epson tmu-675 p service manual

Confidential

Service manualTM-U675/U675P

(without autocutter)

English401093601

Issued Date 200 , ,

Issued by

EPSON

Confidential TM-U675/U675P(without autocutter) Service Manual

Revision Table

Rev. Page Description

Rev. A All pages Newly authorized

Rev. B Front cover

Manual title changed in the following way.

Old: TM-U675/U675P (with MICR)New: TM-U675/U675P (without autocutter)

Reason for change:There was a need to review the TM-U675/U675P service manual due to the addition of “with autocutter” and “paper path spacer supported model.”

New manual system:The TM-U675/U675P service manual has been separated into the following 2 volumes.

TM-U675/U675P (without autocutter) service manual (this manual)(Applicable models:)• TM-U675/U675P without autocutter• TM-U675/U675P with MICR/without MICR• TM-U675/U675P paper path spacer supported model / paper path spacer unsupported

model

TM-U675/U675P (with autocutter) service manual (manual code: 4012391)(Applicable models:)• TM-U675/U675P with autocutter• TM-U675/U675P with MICR/without MICR

All pages Headers of all pages have been changed in the following way.

Old: TM-U675/U675P (with MICR) service manualNew: TM-U675/U675P (without autocutter) service manual

Reason for change:There was a need to review the TM-U675/U675P service manual system.

Chapter 2

The explanations of Chapter 2 have been completely revised. Also, some illustrations have been revised as a result.

Reason for change:To make the explanation easier to understand.

1-20, 1-21

Changed the explanation for “Removing Paper Jam.”

Reason for change:Mistakes and missing information.

AppendixE, F-1, G-1

Eliminated the RS-232 I/F circuit board unit “connector plate (type AA)” from the parts list and the exploded diagram.

Reason for change:The RS-232 I/F circuit board unit “connector plate (type AA)” is no longer supplied as a service part.

Revision Table i

Confidential

Rev. B(con-tinued)

2-114,AppendixE,F-1, G-1

Removed the “caution seal” and added the “head caution seal.” The number of “caution seals” used changed from 2 to 1.

Seal design

• Caution seal (Eliminated part)

• Head caution seal (Added part)

Reason for change:Improvement in safety.

3-10 Added “CAUTION.”

Reason for change:Missing in earlier version.

B-2, B-3

Changed the period for cleaning the MICR head in the following way.

Old: Every three monthsNew: Once a year or every 72,000 passes

Reason for change:Higher MICR head performance than originally estimated is confirmed.

D-67 -D-76

Changed contents of manual to align with changes in specifications. (Details omitted.)

1-14 Table 1-4, step 8 “Location of Measurement” has been changed in the following way.

Old: Located near Q7 drainNew: Located near Q7 source


D-32 Eliminated the explanation for “Endorsement printing.”



ii Revision Table

Confidential TM-U675/U675P(without autocutter) Service Manual

Rev. B(con-tinued)

D-57 The following descriptions have been eliminated.

Through this example uses a bar magnetic, actual reading of magnetic ink characters is performed by passing current through a coil in the read head, creating an electromagnetic field.


AppendixE, F-1, G-1

Added “76 mm width specification kit.”

76 mm width specification kit76 mm roll paper can be used by attaching the following components to the “roll paper holder.”

Reason for change:The “76 mm kit” was to be included or to be assembled at shipment part way through production.

2-86,2-114,3-10,AppendixE,F-1,G-1,Adden-dum 1

Added an explanation for the “paper path spacer supported model.” See Addendum 1 for details of the “paper path spacer supported model.”

Reason for change:The “paper path spacer supported model” was added.


159

160

161

159 = Roll paper guide160 = Holder plate (type B)161 = 76 mm kit

(Numbers indicate those used in the exploded diagrams.)

Revision Table iii

Confidential

iv Revision Table

Rev. B i

TM-U675/U675P (without autocutter) Service ManualConfidentialCONFIDENTIALITY AGREEMENT

BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT. PLEASE RETURN THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE TO THESE TERMS.

This document contains confidential, proprietary information of Seiko Epson Corporation or its affiliates. You must keep such information confidential. If the user is a business entity or organization, you must limit disclosure to those of your employees, agents, and contractors who have a need to know and who are also bound by obligations of confidentiality.

On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson’s request, you must stop using the confidential information. You must then return or destroy the information, as directed by Seiko Epson.

If a court, arbitrator, government agency, or the like orders you to disclose any confidential information, you must immediately notify Seiko Epson. You agree to give Seiko Epson reasonable cooperation and assistance in the negotiation.

You may use confidential information only for the purpose of operating or servicing the products to which the document relates, unless you obtain the prior written consent of Seiko Epson for some other use.

Seiko Epson warrants that it has the right to disclose the confidential information. SEIKO EPSON MAKES NO OTHER WARRANTIES CONCERNING THE CONFIDENTIAL INFORMATION OR ANY OTHER INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY WARRANTY OF TITLE OR NON-INFRINGEMENT. Seiko Epson has no liability for loss or damage arising from or relating to your use of or reliance on the information in the document.

You may not reproduce, store, or transmit the confidential information in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of Seiko Epson.

Your obligations under this Agreement are in addition to any other legal obligations. Seiko Epson does not waive any right under this Agreement by failing to exercise it. The laws of Japan apply to this Agreement.

Cautions No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any

means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation.

The contents of this document are subject to change without notice. Please contact us for the latest information.

While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no responsibility for errors or omissions.

Neither is any liability assumed for damages resulting from the use of the information contained herein.

Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.

Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options or any consumable products other than those designated as Original EPSON Products or EPSON Approved Products by Seiko Epson Corporation.

EPSON® and ESC/POS® are registered trademarks of Seiko Epson Corporation

ii Rev. B

ConfidentialContents

Revision TableConfidentiality Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iFor Safe Repair and Maintenance Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viSafety Precautions on Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viSafety Precautions on Maintenance/Repair/Inspection . . . . . . . . . . . . . . . . . vii

Note on Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viiiModular Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viiiAbout This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Aim of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ixManual Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Chapter 1 Troubleshooting

Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Diagnosing Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Printer Mechanism Power on Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Opening and Closing the Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Detecting the Head Carriage Home Position . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Starting and Stopping Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Printing Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Ending the Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6MICR Reader Test (Only with Printers that Have a MICR Unit) . . . . . . . . . . 1-7

Troubleshooting Using the ERROR LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Test Points on the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11Test Points on the Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Power Supply Line Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Locations of the Main Elements on the Main Circuit Board Unit . . . . . . . . . . . . . . 1-15Procedures for Replacing the Print Head Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16Removing Paper Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Paper Jams in the Roll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20Paper Jams in the Slip Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Detector Functions and Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Chapter 2 Assembly and Disassembly

Before Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1About this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Assembling the Mechanism Assembly (M-U675) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Pre-assembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Assembly of the Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46

Assembling the TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84Pre-assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84Assembly of the TM-U675 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-86

Chapter 3 Adjusting and Setting

Before Adjusting and Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Phase Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Adjusting the Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Setting Threshold Values for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Rev. B iii

TM-U675/U675P (without autocutter) Service ManualConfidentialAppendix A Service Tools and Lubricants

Appendix B Maintenance

Maintenance and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

MICR Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3Cleaning Sheet Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3Procedures for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Appendix C Installation

Connecting to the Host PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1Connecting the Drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2Connecting to a Direct Connection Display Module . . . . . . . . . . . . . . . . . . . . . . . . C-3Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4

Appendix D Product Overview

Component Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1Outline of Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Printing Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2Detection Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7Roll Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15Slip Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-25Validation Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29Ribbon Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29MICR Mechanism (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-31

Outline of Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34Connection of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-35Memory Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-37CPU and Peripheral Logic Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-39Slip Mechanism Drive Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-50Input Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-60Control Panel Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-63Malfunction Protective Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-64Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-65Important Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-66

DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67Parallel Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-69

Outline of Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-70Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-70Printer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-71MICR Reader (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-72Overall Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-73Interface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-74

Appendix E Parts List

Alphanumeric List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9

iv Rev. B

ConfidentialAppendix F Exploded Diagrams

TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8

Appendix G General Lubrication Point Diagrams

TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-5Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-8

Appendix H Circuit Board Unit Circuit Diagrams

Main Circuit Board Assembly (Outline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-1Main Circuit Board Assembly (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-2Main Circuit Board Assembly (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-3Main Circuit Board Assembly (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-4Main Circuit Board Assembly (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-5Main Circuit Board Assembly (MICR I/F Block) . . . . . . . . . . . . . . . . . . . . . . . H-6

Main Circuit Board Assembly (Memory Block) . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-7RS-232 I/F Circuit Board Assembly (UB-S01) Circuit Diagram . . . . . . . . . . . . . . . H-8Parallel I/F Circuit Board Assembly (UB-P02) Circuit Diagram . . . . . . . . . . . . . . H-9RS-485 I/F Circuit Board Assembly (UB-S02) Circuit Diagram . . . . . . . . . . . . . . . H-10

Appendix I Printer Handling

Using the Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1Opening the Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2Installing or Replacing the Paper Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2

Removing paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5Installing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7Inserting Slip Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9Inserting Validaton Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9Reading MICR Characters On Personal Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-10Adjusting the Roll Paper Near End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12PAPER OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12SLIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12Control Panel Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12FEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13

Appendix J Screw Types

Appendix K Parts Layout

Main Circuit Board Unit (Parts Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-1Main Circuit Board Unit (Solder Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-2

Rev. B v

TM-U675/U675P (without autocutter) Service ManualConfidentialRS-232 I/F Circuit Board Assembly (UB-S01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3Parallel I/F Circuit Board Assembly (UB-P02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3RS-485 I/F Circuit Board Assembly (UB-S02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3

Addendum 1 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)

TM-U675 PPSS Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-2TM-U675 PPSS Model Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-3How to Identify the TM-U675 PPSS Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-4Installing and Removing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-5

Removing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-5Installing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-7

Setting Threshold Values for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-11

vi Rev. B

ConfidentialFor Safe Repair and Maintenance Work

Key to Symbols

The symbols in this manual are identified by their level of importance, as defined below. Read the following carefully before handling the product.

WARNING:You must follow warnings carefully to avoid serious bodily injury.

CAUTION:Observe cautions to avoid minor injury to your self, damage to your equipment, or loss of data.

Note:Notes have important information and useful tips on the operation of your equipment.

Safety Precautions on Handling

This section presents important information intended to ensure safe and effective use of this product. Please read this section carefully and store it in an accessible location.

WARNING:Shut down your equipment immediately if it produces smoke, a strange odor, or unusual noise. Continued use may lead to fire or electric shock. Immediately unplug the equipment.

Only disassemble this product as described in this manual. Do not make modifications to the unit. Tampering with this product may result in injury, fire, or electric shock.

Be sure to use the specified power source. Connection to an improper power source may cause fire or shock.

Never insert or disconnect the power plug with wet hands. Doing so may result in severe shock.

Do not allow foreign matter to fall into the equipment. Penetration by foreign objects may lead to fire or shock.

If water or other liquid spills into this equipment, unplug the power cord immediately. Continued usage may lead to fire or shock.

Do not place multiple loads on the power outlet (wall outlet). Overloading the outlet may lead to fire.

Rev. B vii

TM-U675/U675P (without autocutter) Service ManualConfidentialAlways supply power directly from a standard domestic power outlet.

Handle the power cord with care. Improper handling may lead to fire or shock.

Do not modify or attempt to repair the cord.

Do not place any object on top of the cord.

Avoid excessive bending, twisting, and pulling.

Do not place cord near heating equipment.

Check that the plug is clean before plugging it in.

Be sure to push the prongs all the way in.

CAUTION:Do not connect cables in ways other than those mentioned in this manual. Different connections may cause equipment damage and burning.

Be sure to set this equipment on a firm, stable, horizontal surface. Product may break or cause injury if it falls.

Do not use in locations subject to high humidity or dust levels. Excessive humidity and dust may cause equipment damage, fire, or shock.

Do not place heavy objects on top of this product. Never stand or lean on this product.Equipment may fall or collapse, causing breakage and possible injury.

To ensure safety, please unplug this product prior to leaving it unused for an extended period.

Do not touch the print head or the paper feed motor. Wait for the head and the motor to cool. The head and the motor can be very hot after printing for a long time. Touching them may cause burns.

Safety Precautions on Maintenance/Repair/Inspection

WARNING:Be sure to use the designated type of fuse for the circuit board. Use of a different type may result in fire.

Remove the power cord and all other cables from this product before disassembly or reassembly to prevent electrical shock.

To prevent the possibility of electrical shock, do not perform maintenance, repair, or inspection during a thunder storm.

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CAUTION: Wear a grounded wrist band when handling the internal circuit boards to prevent damage from static electricity.

When removing an internal circuit board, place it on an anti-static rubber sheet or similar surface to prevent damage from static electricity.

Parts on the circuit board may become hot during operation. Therefore, wait approximately 10 minutes after turning the power off before touching them.

Be careful not to subject the circuit boards to shock or vibration, because this may damage them.

Do not touch the circuit board or cable terminals with your hands to prevent contamination that may result in a malfunction.

Do not use an alcohol, benzine, thinner, trichloroethylene, or ketone-based solvent to clean the parts. This type of solvent may damage the plastic and rubber parts.

Wipe off any dirt with a dry or slightly moist cloth. Be sure to remove the power cord from the outlet at this time.

Note on Disposal

Note:Be sure to follow current laws or regulations when disposing of the product.

Modular Connector

The following label is visible near the two modular connectors on the back of this product.

Use the modular connectors specifically designed for the cash drawer and customer display for this product. Do not connect these connectors to an ordinary telephone line.

Rev. B ix

TM-U675/U675P (without autocutter) Service ManualConfidential

About This Manual

Aim of the Manual

This manual was created to provide the information on printer maintenance and repair required by technicians who handle this work.

Manual Content

The manual is made up of the following sections:

Chapter 1 Troubleshooting Describes troubleshooting procedures (specific problems and remedies)

Chapter 2 Assembly and Disassembly Describes product assembly and disassembly

Chapter 3 Adjusting and Setting Describes product adjustment and setting procedures

Appendix A Service Tools and Lubricants

Describes tools and lubricants required to perform maintenance and repair

Appendix B Maintenance Describes required procedures to perform maintenance and inspection

Appendix C Installation Describes installation procedures

Appendix D Product Overview Provides reference information for maintenance and inspection

Appendix E Parts List Contains a list of spare parts

Appendix F Exploded Diagrams Disassembly diagrams for the product

Appendix G General Lubrication Point Diagrams

Lubrication point diagrams for this product

Appendix H Circuit Board Unit Circuit Diagrams

Circuit diagrams for the product

Appendix I Printer Handling Describes required handling procedures when performing maintenance and repair

Appendix J Screw types Describes screw types

Appendix K Parts layout Describes parts layout

Addendum 1 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)

This addendum explains the differences in maintenance for the TM-U675 model that supports paper path spacers. Note that this model is called as the validation/slip model from sales point of view.

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Chapter 1Troubleshooting
Before Servicing

The beginning of this manual (pages vi to ix) provides precautions you should observe to perform work safely and the necessary information to service this product safely. Always read that information before starting your work.

Diagnosing Failures

Use one of the following methods to diagnose the area where a failure occurred.

See Table 1-1 for diagnosing the area where a failure occurred by the symptom of the problem.

See Table 1-2 on page 1-9 for diagnosing the area where a failure occurred from the ERROR LED code.

See Table 1-4 on page 1-13 when the failure is on the main circuit board unit.

Note:The explanation of how to use the self test is on page 1-6.The explanation of power on self checks is on page 1-4.

Symptoms and Solutions

This explains how to find the source of a problem using the symptom. The numbers in the Solutions column indicate the order to use to check the problem. If you cannot determine the cause of the problem after checking the first item, proceed to the next number.

Table1-1 Symptoms and Checkpoints

Symptom Checkpoints (by Priority)

Power does not turn on.Power on self check is not completed.Or, POWER LED does not light.

1. Check the power supply unit. Check that 24V is coming out of the power supply.

2. Check the main circuit board unit. (See page 1-13.) 3. Unplug the printer. Then unplug each motor or coil's connector

from the main board one by one; plug the printer back in, and power it on. This will let you know if any motor or coil has burned out and is pulling down the power. (See page 1-11.)

4. Replace the I/F circuit board. (See page 2-110.)

There are missing dots in the print. 1. Replace the print head unit. (See page 1-17.)2. Replace the main circuit board unit. (See page 2-86.)

The print is thin. 1. Replace the ribbon cassette. (See page I-7.)2. Proceed to “Ribbon won’t feed” below.

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Ribbon won’t feed. 1. Replace the ribbon cassette. (See page I-7.)2. Check sprocket and gears for paper particles.3. Check the carriage motor and gears. (See page 1-11.)4. Replace the main circuit board. (See page 2-86.)

Unevenness occurs in the concentration of the print.

1. Replace the ribbon cassette. (See page I-7.)2. Adjust the platen gap. (See page 3-8.)

There is ink smudging on the print surface. 1. Check for paper residue around the print head unit.2. Adjust the platen gap. (See page 3-8.)

Paper jams Remove the jammed paper by following the directions in “Removing Paper Jams” on page 1-20.

Roll paper feed failure 1. Check that the roll paper is inserted correctly. (See page I-2.)2. Check the paper feed motor. (See page 1-11.)3. Check the J/S change solenoid. (See page 1-11.)4. Replace the main circuit board unit. (See page 2-86.)

Slip paper/validation paper feed failure 1. Check that the slip paper/validation paper is inserted correctly. (See page I-9)

2. Check the paper feed motor. (See page 1-11.)3. Check the J/S change solenoid. (See page 1-11.)4. Replace the main circuit board unit. (See page 2-86.)

Roll paper take-up failure 1. Check that the roll paper is inserted correctly. (See page I-5.)2. Check that the take-up assembly is installed correctly into the

printer. (See page I-5.)3. Check that the take-up belt is attached correctly. (See page 2-99.)4. Check the paper feed motor. (See page 1-11.)5. Check the J/S change solenoid. (See page 1-11.)6. Replace the main circuit board. (See page 2-86.)

The printer won’t recognize when slip paper is inserted.

1. Clean away dirt around the slip B. O. F. detector assembly or the slip T. O. F. detector assembly. (See page B-2.)

2. Replace the slip B. O. F. detector assembly. (See page 2-54.)3. Replace the slip T. O. F. detector assembly. (See page 2-68.)4. Replace the main circuit board unit. (See page 2-86.)

The printer won’t recognize when validation paper is inserted.

1. Clean away dirt around the validation detector assembly. (See page B-2.)

2. Replace the validation detector assembly. (See page 2-54.)3. Replace the main circuit board unit. (See page 2-86.)

Roll paper semi-auto loading paper feed failure

1. Check that the roll paper is inserted correctly. (See page I-2.)2. Remove paper residue and dirt from the inside the paper feed

frame assembly.3. Check the paper feed motor. (See page 1-11.)4. Check the J/S change solenoid. (See page 1-11.)5. Replace the main circuit board unit. (See page 2-86.)



1-2 Troubleshooting Rev. B


Drawer kick operation failure 1. Replace the main circuit board unit. (See page 2-86.)

Display module display failure 1. Check that the unit is a serial model. (The display module will not work on parallel models.)

2. Check that DIP switch 2-2 is set to ON. (If it is OFF, the display module will not work.)

3. Check fuse F3 on the main circuit board unit. (See page 1-15.)4. Replace the main circuit board unit. (See page 2-86.)

MICR reading failure 1. Clean the MICR head. (See page B-3.)2. Replace the MICR head. (See page 2-72.)3. Replace the MICR fixing and MICR fixing sheet. (See page 2-10)4. Replace the MICR solenoid. (See page 2-12.)5. Replace the main circuit board unit. (See page 2-86.)

Missing characters/misprinted characters/font breakdown

1. Check the settings of the DIP switches. (See page D-67.)2. Replace the interface cable. (See page C-1.)

ERROR LED is lit.(When it is flashing, see page 1-9.)

1. Close the front cover or roll paper cover (rear cover).2. Replace with new roll paper. (See page I-2.)




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Printer Mechanism Power on Checks

The printer mechanism runs through the following tests when you turn on the power supply to the printer.

Opens and closes the platen. Detects carriage home position. Feeds roll paper to the printer.

This section describes the items that you can check visually.

Opening and Closing the Platen

The printer opens and closes the platen once. Check this operation with the front cover opened.

Figure 1-1 Opening and closing the platen

Detecting the Head Carriage Home Position

The head carriage on a dot impact printer moves to the left side (home position) once and then to the right side before stopping. Check this operation with the front cover opened.

Figure 1-2 Detecting the head carriage home position

check for the platen open and close operation

check for head carriage movement


Feeding Roll Paper
Roll paper is fed 1 to 2 mm. You cannot see this if the roll paper is not inserted.

Figure 1-3 Feeding roll paper

check for paper feed


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Starting and Stopping Self Tests

Printing Tests

Starting the Tests

Roll paper self test:

The printer starts printing on the roll paper when you turn on the power while holding down the receipt FEED button when all the covers are closed.

Slip paper self test:

The SLIP LED flashes and the printer enters the slip paper wait mode when you turn on the power while holding down the RELEASE button when all the covers are closed. Printing starts on the slip paper when you insert a slip of paper in the printer.

Validation paper self test:

Turn on the power supply while holding down the FEED and the RELEASE buttons while the cover is closed. The SLIP LED flashes and the printer enters the validation paper wait status. In this state, printing begins on the validation paper when you insert validation paper.

Test Wait Mode

Roll paper self test:

After the test print is completed, the printer enters the self test wait mode. The PAPER OUT LED flashes after printing "SELF-TEST printing. Please press PAPER FEED button."Test printing starts when you press the receipt paper FEED button.

Slip paper self test:

When the printer status print is completed, the printer ejects the slip and waits for the next slip of paper. Test printing starts when you insert a slip of paper in the printer.

Validation paper self test:

When the printer has ejected the validation paper, you can insert the next validation sheet and printing continues.

Ending the Test

The printer prints "***completed***" and the test ends when the determined number of lines have been printed. The printer enters the normal mode after the power on tests are completed.


MICR Reader Test (Only with Printers that Have a MICR Unit)
1. Load the roll paper in the printer.

2. Turn off the power supply to the printer.

3. Open the roll paper cover.

4. Press the RELEASE button while turning on the power supply.

5. Press the RELEASE button seven times.

6. Close the roll paper cover.

7. The following message is printed on the roll paper. The SLIP LED flashes.

8. Insert check paper into the printer. Insert so that the MICR characters are facing upward on one side of the paper insertion slot. The printer will run a test to read the check.

9. After reading is completed, remove the check. The printer prints the check data on the roll paper.

**** RECOGNITION MODE ****

Please set check.

<Example Printing> With E13B Font Check Paper

Data that was read (lower line).

??????????? ????????????? ????T012345678T 9012345678900 1234


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10. Verify that the check was read correctly. You can continue running the test by inserting more checks.

11. When you have finished the test, turn off the power supply to the printer.

<Example Printing> With CMC7 Font Check Paper

Data that was read (lower line).

=0000066 =123456789012^ 210987654321/???????? ?????????????? ?????????????


Troubleshooting Using the ERROR LED
You can learn the cause of a failure by checking the ERROR LED code. The following table shows problems and solutions to repair the printer. Numbers in the "Solutions" column indicate the order to use to check the problem. If you cannot determine the cause of the problem after checking all the solutions listed, go back to the flowchart given earlier in this chapter.

Table1-2 Error causes and solutions

Type of Error and ERROR LED Pattern ExplanationSolutions (Listed in the order you should use to check printer)

Carriage home position detection error

The head carriage home position was not correctly detected.

1. Check the carriage assembly for paper jams. (To remove the carriage cover, see page 1-17.)

2. Check for paper dust on the H.P. detector assembly. (To remove the carriage cover, see page 1-17.)

3. Replace the H.P. detector assembly. (See page 2-22.)

Carriage out-of-step error There is no carriage detector output even when the carriage is instructed to move.

1. Check the carriage assembly for a paper jam. (To remove the carriage cover, see page 1-17.)

2. Check the rotary encoder on the carriage motor gear used to detect carriage position (The rotary encoder is on the intermediate circuit board assembly. You need to disassemble the intermediate circuit board assembly to check the encoder. To remove the intermediate circuit board assembly, see page 2-22.)

3. Check the carriage motor. (See page 1-11.) If the motor is shorted, replace it along with the main board.

4. Replace the main circuit board unit to see if the problem is fixed. (See page 2-86)

Slip eject error The slip paper was not ejected normally.

1. Look into the printer from the left side to check for a paper jam in the slip paper transport path.

2. Check the paper feed motor. (See page 1-11)If the motor is shorted, replace it along with the main board.

3. Replace the main circuit board unit to see if the printer is repaired. (See page 2-86)

Roll paper cover open error The roll paper cover (rear cover) was detected as open when printing.

Close the roll paper cover (rear cover).

Memory or gate array R/W error The R/W check did not operate properly for the memory or the gate array.

Replace the main circuit board unit to see if the printer is repaired. (See page 2-86.)


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High voltage error The power supply voltage is high.

Replace the power supply unit to see if the printer is repaired. (See page C-4.)

Low voltage error The power supply voltage is low

Replace the power supply unit to see if the printer is repaired. (See page C-4.)

CPU execution error An abnormal CPU operation was detected, or the I/F board is disconnected.

1. Check whether the I/F board is connected.

2. Replace the main circuit board unit to see if the printer is repaired. (See page 2-86.)

Drive circuit error One of the following was detected.

Print head thermistor detection error

Lever drive motor assembly error

1. Check if the printer is repaired after replacing the print head unit. (See page 1-17.)

2. Check the resistance of the lever drive motor assembly. (See page 1-11.) Replace if shorted.

3. Check if the printer is repaired after replacing the lever motor T. P. detector assembly. (See page 2-69.)

4. Check if the printer is repaired after replacing the main circuit board unit. (See page 2-86.)

Head high temperature error/roll paper error

One of the following problems has occurred.

The roll paper has been inserted into the path wrong.

The print head temperature is high.

1. If the error has occurred after loading the roll paper, the roll paper has been inserted into the path wrong. Reinstall the roll paper.

2. If the error occurred during printing, a high head temperature has been detected. This error may occur if you print continuously for too long. Leave the printer as it is. The error will be automatically cleared when the temperature has decreased. If this error occurs frequently, check if the ambient temperature is within specifications.

Table1-2 Error causes and solutions

Type of Error and ERROR LED Pattern ExplanationSolutions (Listed in the order you should use to check printer)


Test Points on the Printer Mechanism
This section shows how to test the motor and the coils.

Table1-3 Test points on the printer mechanism

Name of Mechanism Part Name Internal Element Function Where to Check Normal Status

Mechanism assembly (M-U675)

Lever drive coil A (left side when facing the front of the printer)

Coil • Form stopper operation• Slip paper roller (sub) operation

Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 26 and pin 27.

Approx. 70 Ω

Lever drive coil B (right side when facing the front of the printer)

Coil • Platen open and close.• Cylindrical printer platen open and close


Approx. 70 Ω

Carriage motor 4 phase stepping motor

Head carriage drive

Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 1 and pin 2 and between pin 3 and pin 4.

Approx. 4.5 Ω (per 1 phase)

Lever drive motor assembly

DC brush motor • Form stopper operation• Slip paper roller (sub) operation• Platen open and close• Endorsement printer platen open and close


The line must be continuous.

Paper feed motor

4 phase stepping motor

Slip paper feed Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 17 and pin 18 and between pin 19 and pin 20.

Approx. 8 Ω (per 1 phase)

J/S change solenoid

Coil Change of journal paper drive/slip paper drive.

Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 21 and pin 22 .

Approx. 45 Ω


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Mechanism assembly (M-U675)

MICR solenoid Coil MICR hold drive Remove the cable connector connected to CN27 on the main circuit board unit and test between pin 1 and pin 2 .

Approx. 28.8 Ω

Table1-3 Test points on the printer mechanism

Name of Mechanism Part Name Internal Element Function Where to Check Normal Status


Test Points on the Main Circuit Board Unit
Power Supply Line Check

After a main circuit board unit failure, one basic method for diagnosing the cause of the problem on the main circuit board unit is to check the power supply line. Use the following table to check the power supply line. First, check step number 1, and proceed to the next step if that is not the problem.

Table1-4 Checking the power supply line

Step # Type of Voltage

Location of Measurement

Condition of Measurement

Normal Value Presumed Cause of the Error

1 Voltage input from the power supply

CN29, pin 1 Output when the power supply is ON.

24 V ± 10 % It is possible that the problem is pre-arcing of the F1 fuse. The fuse may have pre-arced because of an unusual input circuit.

Always replace the fuse after removing the cause of the pre-arcing. If you do not remove the cause of the pre-arcing, and replace this fuse, the problem may expand to misoperation. Also, always use the specified type of fuse when replacing.

2 Voltage input from the power supply

U11, pin 1 Output when the power supply is ON.

24 V ± 10 % It is possible that the problem is pre-arcing of the R3 fuse. The fuse may have pre-arced because of a problem in the logic power supply circuit or because of a VCC over-voltage.

If pre-arcing of the R3 fuse happens, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened by pre-arcing of the R3 fuse and safe operation cannot be guaranteed.

3 Logic voltage (VCC)

VCC pad (near L2)

Output when the power supply is ON.

5 V ± 5 % It is possible that the logic power supply circuit has malfunctioned.

If you find this line has a problem, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened, and safe operation cannot be guaranteed.

4 Logic voltage(VCC-PWR)

VCC-PWR pad (near U14, pin 40)

Output when Q51 (C) is "0." (24V SW1="H")

5 V ± 5 % The logic power supply circuit or Q44 could have malfunctioned.

5 Logic voltage(VCC-PWR2)

U19, pin 8 potential




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6 Logic voltage(VCC_SEN)

CN30, pin 5 potential

Output only when there is output sensor conductivity when CPU output port (SEN_PWR) is "L."


7 Mechanism voltage (24 VA)

Located near Q17 drain

Output when Q24 (C) is "0." (24V SW2 = "H")

24 V ± 10 % Q17 could have malfunctioned.

8 Mechanism voltage (24 VB)

Located near Q7 source

Only output continuously when power supply unit is connected.

24 V ± 10 % TH1 could have malfunctioned.

9 Mechanism voltage (24C)

Located near Q29 base


24 V ± 10 % It is possible that the problem is pre-arcing of the F2 fuse. The fuse may have pre-arced because of a defect in the 24V line circuit elements.

If pre-arcing of the F2 fuse happens, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened by pre-arcing of the F2 fuse, and safe operation cannot be guaranteed.

Table1-4 Checking the power supply line

Step # Type of Voltage

Location of Measurement

Condition of Measurement

Normal Value Presumed Cause of the Error


Locations of the Main Elements on the Main Circuit Board Unit
The following shows the locations of the main elements on the main circuit board unit.

Figure 1-4 Locations of the main elements on the main circuit board unit

Fuse (F1)

Fuse (F2)

Fuse (F3)

*Rear side

Fuse (F4)Fuse (R3)

CPU (U3)

Gate array (U30)*under the memory board

Carriage motor controller (U14)

Slip paper feed motor controller (U17)

Impact dot head drivers (QM3)

Impact dot head drivers (QM6)

Memory board

Font ROM (U513)Program ROM (U508)SRAM (U509)


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Procedures for Replacing the Print Head Unit

Follow the steps below to replace the print head unit.

1. Turn off the power switch to the printer. Remove the power supply unit from the printer.

2. Open the printer front cover and remove the ribbon cartridge.

Figure 1-5 Removing the ribbon cartridge

3. Pull the cable connector out of the slit in the case.

Figure 1-6 Pulling the cable connector out

When you are reattaching the cable, arrange the cable wires as shown below.

Figure 1-7 Arranging the cable wires


4. Remove the two screws and remove the carriage cover frame assembly.
Figure 1-8 Removing the carriage cover frame assembly

When you are reattaching the frame, insert the tooth on the left side into the shaft and align the nib on the right side with the nib hole.

Figure 1-9 Tooth and nib

screw

screw

tooth

nib


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5. Move the head carriage to the right side and remove the print head unit flexible plastic cable
(FPC) from the connector.

Figure 1-10 Removing the print head unit FPC

6. Remove the screw and remove the print head unit.

Figure 1-11 Removing the print head unit

When attaching, pass the print head unit FPC through the slit in the head carriage and attach below the two nibs.

Figure 1-12 Slit and two nibs

two nibsslit


7. Remove the nose guide from the print head unit.
Figure 1-13 Removing the nose guide

8. To reinstall the print head, reverse the procedures you used to remove it. When reinstalling, affix the head seal to the print head unit.

Figure 1-14

nose guide

print head unit

head seal


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Removing Paper Jams

Paper Jams in the Roll Paper

1. Pull the latch lever to the front and open the roll paper cover.

2. Remove the take-up assembly.

3. Open the clamshell mechanism while pushing on the levers on both ends.

Figure 1-15

4. Remove the paper.

5. Close the clamshell mechanism. Push on the clamshell mechanism until you hear a clicking sound.


Paper Jams in the Slip Paper

1. Check that the power to the printer is turned ON. If it is not ON, turn it ON.

2. If the slip paper does not release, press the RELEASE button to free the slip paper.

3. Remove paper from the paper insertion side.

If you cannot remove the paper from the paper insertion side, or paper is cut partially while you are removing it, follow the directions in the previous section entitled “Paper Jams in the Roll Paper” to open the clamshell mechanism and remove the paper.

levers


Detector Functions and Positions
The following shows the positions and the functions of the detectors.

*The roll paper near-end detector mechanism is installed in the paper supply unit.

Figure 1-16

Table1-5 Detectors and functions

Mechanism Function

Home position detection mechanism

Initial setting of printer (carriage home position)

Carriage detection mechanism Detection of head carriage malfunction

B.O.F. detection mechanism Slip detection

T.O.F. detection mechanism Slip detection

Paper ejection detection mechanism

Slip detection

Roll paper end detection mechanism

Roll paper detection

*Roll paper near-enddetection mechanism


Validation detector mechanism Validation paper detection

Lever motor T.P. detection mechanism

Lever drive motor timing signal detection

Front cover detection mechanism Front cover open/closed status detection

Rear cover detection mechanism Detects the open/close status of the rear cover

N.E. detector(Micro switch)

Rear cover detector assembly

Paper ejection detector assembly

Front cover detector assembly

H. P. detectorassembly

Lever motor T.P. detectorassembly

Validation detector assembly

Carriage detectorassembly

Slip T.O.F. detectorassembly

Slip B.O.F. detectorassembly

Paper end detector assembly


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Chapter 2Assembly and Disassembly

Before Assembly and Disassembly

Always observe the following precautions when disassembling and assembling the printer.

CAUTION:Always remove the power supply unit from the printer before working. Power is flowing in the internal circuit board even if you turn the printer off with the power supply switch. You can damage the printer if you work with the power supply still attached.

Remove all peripheral equipment connected to the printer before starting your work.

Do not perform any work that is not described in this chapter. Doing so can result in injuries or damage to the printer.

Do not touch the FPC or the FFC pins with your hands.

About this Chapter

Procedures

This chapter provides the procedures for assembling. Reverse them to disassemble the printer.

Assembly is organized into “Assembling the Mechanism Assembly (M-U675),” and “Assembling the TM-U675.” Each section is further divided into “Pre-assembly” and “Assembly.”

Do “Pre-assembly” steps first, and then do “Assembly” after you have assembled the parts into units to some degree.

Rev. B Assembly and Disassembly 2-1

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Assembling the Mechanism Assembly (M-U675)

Pre-assembly Procedures

Pre-assembly of the Validation Detector Assembly

1. Solder lead wires S, T, R to the validation circuit board.

Figure 2-1

697 Validation detector assembly

757 Lead wire (type R)758 Lead wire (type S)759 Lead wire (type T)

2-2 Assembly and Disassembly Rev. B


Pre-assembly of the Slip B.O.F. Detector Assembly

1. Solder lead wires C, D, E to the slip B. O. F. detector assembly.

2. Insert the slip B. O. F. detector assembly into the slip insertion detector holder.

Figure 2-2

606 Slip insertion detector holder

696 Slip B.O.F. detector assembly

742 Lead wire (type C)743 Lead wire (type D)744 Lead wire (type E)


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Pre-assembly of the Lever Drive Coil Assembly
1. Attach lever drive coils (type A, B) to the lever coil mounting plate sub assembly. The rack for lever drive coil (type A, B) should face upward. Do not confuse type A and B. Type A uses brown lead wires. Type B uses gray lead wires.

2. Assemble the paper feed trigger attraction plates to the lever drive coils (type A, B).

3. Hook paper feed trigger claw springs onto the lever coil mounting plate sub assembly and paper feed trigger attraction plate. One side of the hook on the paper feed trigger claw spring is single and the other side is double. Attach the double side onto the paper feed trigger attraction plate.

4. Lubricate the areas where the paper feed trigger attraction plate contacts other parts (eight places).

Figure 2-3

G-36

G-36

G-36

732 Paper feed trigger attraction plate

732 Paper feed trigger attraction plate

621 Lever drive coil (type A)

622 Lever drive coil (type B)731

Paper feed trigger claw spring

731 Paper feed trigger claw spring

695 Lever coil mounting plate sub assembly



Pre-assembly of the Paper Feed Motor

Note:Perform the following three steps only if your printer has a MICR unit.

1. Insert the paper feed motor into the motor shield case. Insert the paper feed motor gear into the hole in the motor shield case. Check that the motor printed circuit board (PCB) fits into the notch.

2. Insert two motor shield spacers into the motor shield case.

3. Attach the motor shield cover onto the motor shield case (two places). Align the screw holes and the nibs on the opposite side, and push in so that they snap fit.

Figure 2-4

781 Motor shield cover

725 Screw (C.C.S-tite, 2.5X5)

739 Paper feed motor

780 Motor shield case

779 Motor shield spacer

726 Screw (C.B.S-tite F, 3X6)


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Pre-assembly of the J/S Change Solenoid Assembly
1. Attach the J/S change solenoid to the J/S solenoid mounting plate. When doing so, tighten the screw while the J/S change solenoid is touching the nib on the right side of the J/S solenoid mounting plate.

2. Attach the J/S change lever to the J/S solenoid mounting plate, and hook the J/S change spring.

3. Lubricate the sliding part of the J/S change solenoid mounting plate and the J/S change lever in four places.

Figure 2-5

651 J/S change spring

716 Screw (C.C., 2X3)

727 J/S change solenoid774

J/S solenoid mounting plate

650 J/S change lever

G-36

G-36



Pre-assembly of the Slip T. O. F. Detector Assembly

1. Solder lead wires I, J, K to the slip T. O. F. detector assembly.

Figure 2-6

703 Slip T.O.F. detector assembly748 Lead wire (type I)749 Lead wire (type J)750 Lead wire (type K)


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Pre-assembly of the Lever Motor T. P. Detector Assembly
1. Solder lead wires F, G, H to the lever motor T. P. detector assembly.

Figure 2-7

745 Lead wire (type F)746 Lead wire (type G)747 Lead wire (type H)

704 Lever motor T.P. detector assembly



Pre-assembly of the MICR Unit

Note:Perform the following 16 steps only if your printer has a MICR unit.

1. Solder the MICR connector assembly lead wires to the MICR head.

2. Align the MICR frame and MICR head with the nib and attach with one screw.

Figure 2-8

782 MICR assembly

786 MICR connector assembly

792 MICR frame assembly

793 Screw (C.P.(S-P2), 2.5X5)


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3. Attach the MICR fixing sheet to the MICR fixing. Set the hole on the MICR fixing sheet over
the MICR fixing nib and attach so that the MICR fixing sheet does not protrude from the MICR fixing.

4. Attach the MICR fixing to the MICR lever. The tabs on the MICR fixing should fit into the MICR grooves.

5. Assemble by inserting the MICR roller shaft. (Attach the shaft with one E-ring.)

Figure 2-9

777 MICR roller shaft

Hole

Nibs

TabsLooking directly from the bottom

778 E-ring (1.2)

787 MICR lever

791 MICR fixing sheet

788 MICR fixing


6. Insert the two MICR lever guide shafts into the MICR frame, starting with the end with the
smaller diameter.

7. Lubricate the areas where the MICR lever and the MICR frame are in contact (six places).

8. Attach the MICR frame to the MICR lever as shown in the drawing.

Figure 2-10

G-47

G-47

G-47

796 MICR lever guide shaft

792 MICR frame assembly

787 MICR lever


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9. Fit the MICR solenoid into the MICR case.
10. Align and fit the MICR solenoid nib into the MICR frame assembly.

11. Position and attach the MICR lever fixing plate to the MICR lever nib. (Use two screws to attach.)

Note:Tighten the screws while holding the MICR solenoid. Check that the MICR lever will fall under its own weight.

Figure 2-11

783 MICR case

789 MICR solenoid

784 MICR lever fixing plate

794 Screw (C.P.(S), 2.6X8)


12. Insert to attach the MICR roller shaft from the opposite direction of the MICR lever fixing
plate. Attach with one E-ring.

13. Attach the MICR lever spring on the hooks.

14. Check that opening and closing the MICR head assembly has a clicking feel to it.

15. Insert the MICR shield cover into the three slits in the MICR frame.

16. Hook the MICR connector assembly lead wire to the hook on the MICR frame.

Figure 2-12

785 MICR shield cover (type A)

790 MICR lever spring

777 MICR roller shaft

778 E-ring (1.2)


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Pre-assembly of the Carriage Frame Unit
1. Lubricate the carriage motor shaft.

2. Insert the carriage drive pulley into the carriage motor shaft.

3. Lubricate the inside of the carriage drive pulley.

4. Attach the belt drive cap to the carriage drive pulley and secure it with one E-ring. Place the belt drive cap with flat surface face up to install it.

Figure 2-13

720 E-ring (2)

603 Belt drive cap

633 Carriage drive pulley

733 Carriage motor

G-36

G-36



Pre-assembly of the Carriage Assembly

1. Insert the oil rings into the carriage assembly and lubricate. When doing so, insert the flat surface of the oil rings so that they are facing up and down.

2. Hook the carriage spring to the carriage assembly. Push in until you feel the carriage spring click.

Figure 2-14

O-10

O-10

611 Carriage spring

Rounded side

709 Carriage assembly

605 Oil ring


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3. Insert the carriage belt into the carriage assembly. Fit the belt along the grooves in the
bottom side of the carriage assembly. For the direction of the belt, see the illustration below.

Figure 2-15

629 Carriage belt



Pre-assembly of the H. P. Detector Assembly

1. Solder lead wires L, M, N in that order to the H. P. detector assembly.

Figure 2-16

707 H.P. detector assembly

753 Lead wire (type N)

751 Lead wire (type L)752 Lead wire (type M)


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Pre-assembly of the Carriage Frame
1. Lubricate five shafts on the carriage frame sub assembly.

2. Insert the ribbon feed spring into the shaft shown in the figure below. Set the ribbon feed spring claw upward and insert all the way by rotating the ribbon feed spring clockwise.

3. Lubricate the surface of the ribbon feed spring.

4. Attach the ribbon take-up gear assembly to the top of the ribbon feed spring. Align the ribbon feed spring claw and the ribbon take-up gear assembly and insert.

5. Attach the carriage transmission pulley to the shaft shown in the figure below.

6. Apply lubrication to the hole in the carriage transmission pulley.

7. Attach the belt drive cap. Place the belt drive cap with the flat surface face up to install it.

Figure 2-17

G-36

G-36

G-36

G-36

712 Ribbon take-up gear assembly

601 Ribbon feed

spring

603 Belt drive cap

632 Carriage transmission pulley

Carriage frame sub assembly


8. Insert the carriage drive transmission gear into the shaft shown in the figure below.
9. Insert the ribbon reduction gear into the shaft shown in the figure below.

10. Insert the ribbon intermediate gear into the shaft shown in the figure below. The smaller diameter ribbon intermediate gear should be on the lower side.

11. Attach the ribbon drive plate assembly above the ribbon reduction gear and the ribbon intermediate gear. Set the gear side of the ribbon drive plate assembly downward.

12. Attach the gear train cover to the carriage drive transmission gear.

13. Fasten the belt drive cap, carriage drive transmission gear, and ribbon drive plate assembly with three E-rings.

Figure 2-18

720 E-ring (2)

720 E-ring (2)

706 Ribbon drive plate assembly

634 Carriage drive transmission gear

768 Gear train cover

682 Ribbon reduction gear

683 Ribbon intermediate gear

720 E-ring (2)



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14. Insert the hole in the carriage motor onto the carriage frame sub assembly nib. Temporarily
fasten the screw on the lead wire side.

15. Loosen the screw you temporarily tightened in the previous step (less than one turn).

16. Hook the belt tension spring on the carriage motor and carriage frame sub assembly.

Figure 2-19

775 Screw (C.P.S-tite(P4), 3x6)

733 Carriage motor

Nib


630 Belt tension spring


17. Attach the carriage assembly to the carriage frame sub assembly. When doing so, set the
carriage spring under the bent part on the carriage frame sub assembly as shown in the illustration. Insert the carriage guide shaft and secure it with one E-ring.

18. Lubricate the right and left sides of the carriage guide shaft.

19. Hook the carriage belt onto the carriage drive pulley (shown with “1” in the illustration) and carriage transmission pulley (shown with “2” in the illustration) in that order.

20. Tighten the screw (the screw loosened in step 15) on the lead wire side of the carriage motor.

21. Secure another screw to firmly tighten the carriage motor.

Figure 2-20

O-10

O-10

688 Carriage frame sub assembly


611 Carriage spring

709 Carriage assembly

723 E-ring (5)

631 Carriage guide shaft

1

2



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22. Align the intermediate circuit board assembly to the carriage frame sub assembly with two
dowels, and attach the intermediate circuit board cover.

23. Tighten the intermediate circuit board assembly and intermediate circuit board cover together with two screws.

24. Attach the H. P. detector assembly to the carriage frame sub assembly with one screw. Pass the H. P. detector assembly lead wires to the bottom through the hole in the carriage frame sub assembly.

Figure 2-21



769 Intermediate circuit board cover

708 Intermediate circuit board assembly


707 H.P. detector assembly



25. Pass the flexible plastic cable (FPC) for the print head unit (Eb) through the slit in the
carriage assembly. When you do this, the FPC should be below the two hooks on the carriage assembly. Install the print head unit (Eb) onto the carriage assembly. Connect the FPC to the intermediate circuit board assembly connector.

26. Attach the nose guide on the print head unit (Eb) while aligning the three nibs. Secure the nose guide with one screw.

27. Attach the head seal to the print head unit (Eb).

28. Lubricate the carriage motor gear and the top of the E-ring fastening the ribbon drive plate assembly.

Figure 2-22

Figure 2-23

608 Screw (C.P.P-tite, 3X12)623

Nose guide

689 Print head unit (Eb)

FPC

Slit Hooks

G-36

G-36

FPC

795Head seal

689 Print head unit (Eb)

FPC 709 Carriage assembly

688 Carriage frame sub assembly 708

Intermediate circuit board assembly


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29. Solder four carriage motor cables and three H. P. detector assembly cables to the
intermediate circuit board assembly.

30. Solder intermediate cables A, B, C to the intermediate circuit board assembly.

31. Cover intermediate cables A, B, C with the intermediate cable tube. Fold the intermediate cables A, B, C to the right side.

Figure 2-24

771 Intermediate cable tube

Three cablesfor H.P. detectorassembly

Four cablesfor motor carriage

734 Intermediate cable (type A)735 Intermediate cable (type B)736 Intermediate cable (type C)

708 Intermediate circuit board assembly



Pre-assembly of the Front Cover Detector Assembly

1. Solder lead wires V, U, W in that order to the front cover detector assembly.

Figure 2-25

760 Lead wire (type U)761 Lead wire (type V)

762 Lead wire (type W)

691 Front cover detector assembly


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Pre-assembly of the Rear Cover Detector Assembly
1. Solder lead wires X, Y, Z to the cover detector circuit board.

Figure 2-26

692 Rear cover detector assembly

764 Lead wire (type Y)763 Lead wire (type X)

765 Lead wire (type Z)



Pre-assembly of the Paper End Detector Assembly

1. Solder lead wires O, P, Q to the paper end detector circuit board.

Figure 2-27

710 Paper end detector assembly

756 Lead wire (type Q)755 Lead wire (type P)754 Lead wire (type O)


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Pre-assembly of the Assist Paper Guide Assembly
1. Attach the backup paper guide cap to the center of the assist paper guide.

2. Attach the paper hold roller and assist paper guide spring to the assist paper guide. When doing so, attach the assist paper guide spring in the direction shown in the figure.

3. Pass the paper hold roller shaft through the assist paper guide and fasten C-rings in 2 places.

4. Lubricate the center of the hole in the paper hold roller.

Figure 2-28

678 Backup paper guide cap

642 Paper hold roller shaft

664 Assist paper guide

772 C-ring (5103-21)

665 Paper hold roller 772 C-ring (5103-21)

653 Assist paper guide spring

G-36



Paper feed frame assembly

1. Insert the paper guide lever and the sub paper hold roller into the paper feed frame assembly.

2. Pass the sub paper hold roller shaft into the paper feed frame assembly and sub paper hold roller. (E-ring, 1 place)

3. Attach the paper guide lever spring and paper ejection detector holder to the paper guide lever with one E-ring. Attach the paper guide lever spring in the direction shown in the figure.

Figure 2-29

663 Sub paper hold roller

658 Paper guide lever

652 Paper guide lever spring

724 E-ring (2.3)

724 E-ring (2.3)

698 Paper feed frame assembly

640 Sub paper hold roller shaft

639 Paper guide lever shaft


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4. Attach the sub paper feed roller assembly and the crank shaft holders to the paper feed
frame assembly.

5. Lubricate the areas where the sub paper feed roller assembly and the crank shaft holder are in contact.

6. Attach the parallel pin and paper feed gear to the sub paper feed shaft with two E-rings.

Figure 2-30

722 E-ring (4)

730 Crank shaftholder

699 Sub paper feed roller assembly

699 Sub paper feed roller assembly

730 Crank shaft holder

602 Parallel pin (1.6X10)

602

648 Paper feed gear

722 E-ring (4)

G-48

G-48


7. Hook the paper guide lever spring to the paper guide lever and paper feed frame. Insert the
tip of the short side of the spring into the lever groove, and bend the spring to hook the tip of the long side on the inside in the gap in the frame.

Figure 2-31

658 Paper guide lever652 Paper guide lever spring

698 Paper feed frame assembly


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8. Snap-fit the paper feed frame assembly to the paper end detector to attach.
Figure 2-32

710 Paper end detector assembly


9. Attach the paper feed roller to the paper feed frame assembly.
10. Attach the crank shaft holder, parallel pin, and the paper feed gear to the paper feed roller with two E-rings.

11. Lubricate the sliding parts of the paper feed roller and crank shaft holder.

12. Attach the paper feed gear to the axis shown in the figure for the paper feed frame assembly with one E-ring.

Figure 2-33

666 Paper feed roller

722 E-ring (4)730 Crank shaft holder

648 Paper feed gear

648 Paper feed gear

722 E-ring (4)

722 E-ring (4)

602

G-48

G-48

666 Paper feed roller




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13. Attach the assist paper guide to the paper feed frame assembly using the paper feed roller
springs.

14. Set the hooks for the paper feed roller springs into the grooves for the shaft and hang the loop of the spring onto the protrusion on the paper feed frame assembly. Be careful of the direction of the attachment of the spring.

Figure 2-34

654 Paper feed roller spring

654 Paper feed roller spring


15. Insert the slip feed roller holder into the slip feed roller.
16. Attach the slip feed roller to the platen lever assembly with one E-ring. Insert the pin-shaped nib of the slip feed roller holder into the third hole from the left on the platen lever assembly.

17. Push the slip drive gear into the slip feed roller from the side with the larger diameter.

18. Apply lubrication to both sides of the slip feed roller and the slip feed roller holder. Rotate the roller several times to allow the oil to work its way completely around.

Figure 2-35

G-48

G-48

72 E-ring (3)

668 Slip feed roller

668

659 Slip feed roller holder

624 Platen lever assembly

649 Slip drive gear


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19. Insert the nylon lock nut (M3) onto the platen lever assembly on the side where the platen
ground plate (type A) is to be attached. The rounded side of the nylon lock nut (M3) should be facing the direction shown in the illustration.

20. Insert the platen ground plate (type A) into the platen lever assembly.

21. Insert the two platen springs into the platen lever assembly.

22. Insert another nylon lock nut (M3).

23. Attach the platen assembly to the platen lever assembly. Secure the two platen adjustment screws.

24. Attach the slip paper guide to the platen lever assembly. Hang the slip paper guide on the hooks in three places on the platen lever assembly and fit the 2 nibs.

Figure 2-36

685 Platen adjustment screw

711 Platen assembly

685 Platen adjustment screw

718 Nylon lock nut

604 Platen spring

604Platen spring

670 Slip paper guide

674 Platen groundplate (type A)

718 Nylon lock nut


25. Attach the platen lever assembly, platen ground plate B, and the platen lever spring to the
paper feed frame assembly. Insert the platen lever spring onto the cross-shaped protrusion on the paper feed frame, and insert the other end onto the protrusion on the platen lever assembly.

26. Insert the left and right platen lever shafts into the holes in the platen lever assembly and attach with two E-rings.

Figure 2-37

626 Left platen lever shaft

721 E-ring (3)

721 E-ring (3)

625 Platen lever spring 675

Platen ground plate (type B)

727 J/S change solenoid


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27. Insert the lead wires for the paper end detector assembly in their specified positions.
Figure 2-38


28. Attach the cover ground plate to the paper feed frame assembly.
29. Cover the paper feed frame assembly using the paper feed cover and tighten the two plate assembly lever screws.

30. Hang the assist paper guide spring onto the paper feed frame cover. Check the operation of the assist paper guide.

31. Insert the paper release lever into the platen lever assembly and attach to the release lever shaft with one E-ring.

32. Attach the guide roller shaft and sub paper hold roller to the paper feed frame assembly with two E-rings.

Figure 2-39

609 Screw (C.B.P-tite, 3X6)

676 Cover ground plate

669 Paper feed frame cover


641 Guide roller shaft

720 E-ring (2)

663 Sub paper hold roller

719 E-ring (1.5)

657 Paper release lever

638 Release lever shaft

720 E-ring (2) 663 Sub paper hold roller


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33. With one E-ring, attach the paper feed frame fixing L lever assembly and the paper feed
frame fixing lever spring to the paper feed release assembly. Hang the spring onto the paper feed frame fixing L lever assembly and hang onto the protrusion on the paper feed frame so that it passes below the cover ground plate.

34. With one E-ring, attach the paper feed frame fixing R lever assembly and the paper feed frame fixing lever spring to the paper feed release assembly. Hang the spring onto the paper feed frame fixing R lever assembly and hang the spring onto the protrusion of the paper feed frame assembly.

Figure 2-40

701 Paper feed frame fixing L lever assembly

655 Paper feed frame fixing

lever spring

702 Paper feedframe fixing R lever assembly

655 Paper feedframe fixinglever spring

722 E-ring (4)

722 E-ring (4)


35. Attach the parallel pin and paper feed gear to the paper feed roller with one E-ring.
Figure 2-41

648 Paper feed gear

722 E-ring (4)


602


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Pre-assembly of the Carriage Cover Frame Assembly
1. Solder the paper ejection detector cable assembly (type B) to the paper ejection detector assembly. After soldering, pass the cables through the slit in the paper ejection detector assembly.

Figure 2-42

690 Paper ejection detector assembly

738 Paper ejection detector cable (type B) assembly

Slit


2. Attach the paper ejection detector assembly and the paper ejection detector holder. Then
secure them with one screw.

3. Route the paper ejection detector cable assembly (type B) as shown in the illustration.

Figure 2-43


635 Paper ejection detector holder

690 Paper ejection detector assembly



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4. Hook the paper ejection detector cable assembly (type B) onto the hooks on the carriage
cover frame assembly. Check the starting position for inserting the cable.

5. Attach the paper ejection detector assembly to the carriage cover frame assembly with one screw.

Figure 2-44


635 Paper ejection detector holder

713 Carriage cover frame assembly




Pre-assembly of the Lever Drive Motor Assembly

1. Solder the lead wires A, B to the lever drive motor assembly. Solder lead wire (type A) (red) to the terminal on the side where the label is affixed.

Figure 2-45

740 Lead wire (type A)

741 Lead wire (type B)

686 Lever drive motor assembly

Label


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Assembly of the Mechanism

1. Tighten two screws on the front of the main frame.

2. Attach the lever drive motor assembly to the main frame with two screws. Install so that the label side of the lever drive assembly motor is facing the back.

Figure 2-46


Main frame

686 Lever drive motor assembly773 Screw (C.B., 2.6X4)



3. Attach the sub slip feed roller holder to the farthest right hole in the sub slip feed lever sub
assembly with one screw.

Figure 2-47

687 Sub slip feed lever sub assembly

660 Sub slip feed roller holder



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4. Attach the sub slip feed lever spring to the main frame.
5. Attach the sub slip feed lever sub assembly to the main frame. Insert the sub slip feed lever shaft from left side and fasten it with one E-ring.

Figure 2-48

644 Sub slip feed lever shaft

656 Sub slip feed lever spring

Main frame

719 E-ring (1.5)

687 Sub slip feed lever sub assembly


6. Install the form stopper into the main frame, and attach the form stopper shaft with one E-
ring. Insert the form stopper shaft from the outer side of the main frame.

7. Hook the form stopper spring to the main frame and form stopper rack.

Figure 2-49

620 Form stopper spring

620

719 E-ring (1.5)

618 Form stopper

618

619 Form stopper shaft

656 Sub slip feed lever spring

Main frame


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8. Attach the lever drive shaft assembly to the main frame. Insert the D cut side of the lever
drive shaft assembly to the left and attach to the main frame.

9. Insert the crank shaft holders from the left and right outer sides and attach with one E-ring.

Figure 2-50



693 Lever drive shaft assembly

723 E-ring (5)


10. Press the lever drive shaft gear into the lever drive shaft assembly.
11. Assemble the sub slip feed roller assembly into the main frame.

12. Press the slip drive gear onto the sub slip feed roller assembly. Press in starting from the slip drive gear whose diameter is larger. (See the illustration below.)

Figure 2-51

649 Slip drive gear

694 Sub slip feed roller assembly

617 Lever drive shaft gear

Main frame


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13. Snap fit the lever drive motor detector plate to the gear on the lever drive motor assembly.
When doing so, align the rib on the gear and attach.

14. Lubricate the shaft to which the lever motor reduction gear is attached.

15. Use one E-ring to attach the lever motor reduction gear to the shaft. The arrow on the lever motor reduction gear should be facing the outside.

Figure 2-52

G-36

Rib

724 E-ring (2.3)

615 Lever motor

reduction gear

614 Lever drive

motor detector plate


16. Lubricate the inside of the sub slip feed lever shaft in two places.
17. Lubricate the sub slip feed roller holder.

18. Lubricate the form stopper shaft rotating unit in two places.

19. Lubricate the main frame and sub slip feed roller where they contact.

20. Lubricate the form stopper and sub slip feed lever sub assembly shaft where they contact.

21. Lubricate the cam on the lever drive shaft assembly.

Note:Apply G-48 grease from step 16 to 20 but apply G-36 to the cam in step 21.

Figure 2-53

G-48

G-36G-48

G-48

G-48

G-48

G-48

Step 20

Step 21Step 18

Step 19

Step 16

Step 17

Step 19


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22. Attach the validation detector assembly to the slip guide lower frame with one screw.
Note:The parts used and the shape of the slip guide lower frame will vary based on the specifications. Use only the one that matches your configuration.

23. Attach the validation stopper and validation stopper spring to the slip guide lower frame.

24. Hook the cable line of the slip B.O.F. detector assembly to the slip guide lower frame.

Figure 2-54

662 Slip guide lower frame

662

673 Validation stopper spring

696 Slip B.O.F. detector assembly

673

672

672 Validation stopper


697 Validation detector assembly


25. Attach the slip guide lower frame to the main frame using two screws. When doing so, pass
the cable wire on the slip B.O.F. detector assembly through the hole in the main frame.

Figure 2-55


Main frame

Hole


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26. Insert the sub slip hold sleeve onto both ends of the shaft for the sub slip hold rollers.
27. Temporarily attach the front frame and the slip guide upper frame. When doing so, align the nibs shown in the illustration with the nib holes.

28. Temporarily attach the sub slip hold roller so that the D cut side is on the right side.

Figure 2-56

661 Slip guide upper frame

667 Sub slip hold roller

613 Front frame

770 Sub sliphold sleeve

770 Sub slip hold sleeve

Nib

Nib

Hole

Hole


29. Attach the slip guide upper frame to the slip guide lower frame. When doing so, align the
nibs and the claw shown in the illustration with the corresponding holes and slit.

Figure 2-57

661 Slip guide upper frame

Claw

Nibs

Nib

Nibs

662 Slip guide lower frame (type B)


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30. While aligning the three nibs shown in the illustration, attach the front reinforcement frame
to the front frame and secure them with six screws. When doing so, make sure the nibs and claw you aligned in the previous step (step 29) are still aligned.

31. Tighten the two screws to secure the slip guide upper frame.

32. Attach the endorsement platen shutter to the slip guide upper frame.

Figure 2-58

612 Front reinforcement

frame

726Screw (C.B.S-tite F, 3X6)


680 Endorsement platen shutter

Nibs


33. Insert the slip hold roller spring onto the slip hold roller shaft from the D cut side.
34. Insert the slip hold roller sleeve onto the slip hold roller shaft from the D cut side.

35. Insert the two slip feed roller shaft holders onto the slip hold roller shaft with the flange facing inward.

Figure 2-59

610 Slip feed roller shaft holder

645 Slip hold roller shaft

610 Slip feed roller shaft holder

766 Slip hold roller sleeve

767 Slip hold roller spring


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36. Attach the slip hold roller shaft to the main frame in the order shown in the illustration.
Align the D cut portions of the slip feed roller shaft holder with the cutouts in the main frame.

Figure 2-60

PUSH

1

23


37. Attach the slip feed roller shaft holders to both sides of the sub slip hold roller starting from
the small diameter. Secure the holders with two E-rings.

38. Push the slip drive gear into the slip hold roller shaft starting from the side whose diameter is larger.

39. Press the slip drive gear into the sub slip hold roller starting from the larger diameter.

Figure 2-61

721 E-ring (3)

610 Slip feed rollershaft holder

721 E-ring (3)610 Slip feed roller shaft holder

649 Slip drive gear

649 Slip drive gear


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40. Insert three slip transmission gears onto the shafts on the main frame.
41. Insert the paper feed reduction gear onto the shaft on the main frame starting from the gear whose diameter is smaller.

Figure 2-62

729 Paper feed reduction gear

647 Slip transmissiongears

647 Slip transmission gear


42. Lubricate the shaft shown in the figure.
43. Inset the J/S change gear onto the shaft shown in the figure.

44. Insert the paper feed reduction gear into the shaft shown in the figure with the gear whose diameter is largest in.

45. Insert the take-up drive gear into the shaft shown in the figure.

46. Insert the paper feed transmission gear into the shaft shown in the figure.

47. Attach the gears with four E-rings (3).

Figure 2-63

646 Take-up drive gear

721 E-ring (3)

721 E-ring (3)721 E-rings (3)

728 J/S change gear

637 Paper feed transmission gear

721 E-ring (3)

G-36

729 Paper feed reduction gear


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48. Attach the lever drive coil assembly to the slip guide lower frame with two screws.
Figure 2-64


Lever drive coil assembly609 Screw (C.B.P-tite, 3X6)


49. Perform phase adjustment. (See page 3-2,"Phase Adjusting." )
Note:Perform the following step only if your printer has a MICR unit.

50. Attach the shielded paper feed motor to the main frame with two screws. Attach so that the motor cable is facing the direction shown in the illustration.

Figure 2-65




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Note:
Perform the following steps only if your printer does not have a MICR unit.

51. Attach the paper feed motor to the main frame with two screws. Check that the circuit board side of the motor is facing downward as shown in the illustration.

Figure 2-66

739 Paper feed motor




52. Align the J/S change solenoid with the nibs and attach to the main frame with one screw.
53. Lubricate the J/S change gear.

54. Attach the E-ring (2.3) to the J/S change gear shaft.

Figure 2-67

721 E-ring (3)


727 J/S change solenoid

G-36


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55. Snap fit the slip T.O.F. detector assembly to the slip guide upper frame.
56. Pass the slip T. O. F. detector assembly lead wires through the two hooks and pass them through the hole in the main frame.

Figure 2-68

703 Slip T.O.F. detector assembly

Hooks

Hole


57. Align the two nibs and attach the lever motor T. P. detector assembly to the main frame with
one screw. The detector assembly should not touch the lever drive motor detector plate.

Figure 2-69

614 Lever drive motor detector plate

704 Lever motor T.P. detector assembly


614

704


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58. Using two screws, attach the main circuit board assembly to the main frame. Place the board
so the side of the main circuit board assembly with two connectors faces the front of the main frame, and the soldered side faces upward. Align with the nibs in two places.

Figure 2-70


705 Main circuit board assembly

Two connectors


59. Solder the lead wires of the cables to the main circuit board assembly.
Note:See Figure 2-83 on page 2-83 and Table 2-1 for details on where to solder.

60. Hook the lead wires on the side of the paper feed motor as shown in the illustration below.

Figure 2-71


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Note:
Perform the following step only if your printer has a MICR unit.

61. Attach the MICR unit to the slip guide lower frame with two screws. Pass the MICR unit cable through the hole in the main frame.

Figure 2-72

Screw (C.B.P-tite, 3X8)



Note:
Perform the following step only if your printer does not have a MICR unit.

62. Attach the MICR plate shutter to the slip guide lower frame with one screw.

Figure 2-73


679 MICR shutter


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63. Pass intermediate cables A, B, C through the hole in the main frame. Attach the carriage
frame unit to the main frame with four screws. Fit the nibs in the carriage frame unit to the main frame notches.

Note:Check that the carriage assembly moves smoothly and that the ribbon drive plate assembly moves smoothly with the carriage assembly.

Figure 2-74



734 Intermediate cable (type A)735 Intermediate cable (type B)736 Intermediate cable (type C)

Main frame

Hole


64. Attach the paper feed frame stopper and belt plate to the main frame sub assembly.
65. Solder the intermediate cables (type A, B, and C) to the main circuit board assembly.


66. Align the front cover detector assembly with the nib on the main frame and attach (with one screw).

67. Solder the lead wires of the front cover detector assembly to the main circuit board assembly.


Figure 2-75

684 Belt plate



691 Front cover detector assembly

677 Paper feed frame stopper


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68. Attach the rear cover detector assembly and the R cover detector cap to the main frame with
one screw.

69. Solder the lead wires of the rear cover detector assembly to the main circuit board and route the wires.

Figure 2-76

636 R cover detector cap

715 Screw (C.P.S-tite F, 3X5)

692 Rear cover detector assembly


70. Attach the drive lever coil cover to the slip guide lower frame.
Figure 2-77

671 Drive lever coil cover


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71. Insert the paper feed frame shaft into the platen unit.
72. Attach the platen unit to the main frame with two screws. Attach the platen unit as you widen both sides of the frame and fit the D shaped portions on both ends of the shaft into the D shaped cutting holes on the frame.

73. Lubricate the area where the platen lever assembly and the main frame touch.

Figure 2-78

G-36

717 Screw (C.C., 3X5)

Main frame

717 Screw (C.C., 3X5)

643 Paper feed frame shaft

Platen unit


74. Solder the lead wires of the paper end detector assembly to the main circuit board assembly.

75. Lubricate the areas shown in the illustration.

Figure 2-79

G-36

G-36

G-36

G-36

G-36

G-48

G-36


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76. Install the carriage cover on the main frame. Hook the carriage cover on the carriage guide
shaft, and align the screw hole and one nib. Tighten the left side and right side screws in that order.

Figure 2-80


Carriage cover

714 Screw (C.B.S-tite F, 3X4) 2

1


77. Connect the paper ejection detector cable assembly (type A) and the paper ejection detector
cable assembly (type B).

78. Fasten the lead wires for the paper ejection detector cable assembly (type A) and the front cover detector using a nylon clip. Secure one screw to fasten the clip.

Figure 2-81

607Nylon clip 726

Screw (C.B.S-tite F, 3X6)

737Paper ejection detector cable (type A) assembly


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Figure 2-82

607 Nylon clip

106Screw (C.B.S-tite F, 3X6)


737 Paper ejection detector cable (type A) assembly



Reference

The following shows the areas to solder on the main circuit board assembly for M-U675.

Figure 2-83 Areas to solder on the main circuit board assembly for M-U675

Note:The colors of the lead wires to be soldered are shown as abbreviations on the circuit board. Refer to the following table for a list of the abbreviations and color names.

Table 2-1 Meaning of abbreviation

Abbreviations Color

Pur purple

Gry gray

Blk black

Red red

Org orange

Blu blue

Wht white

Pnk pink

Bwn brown

J/S change gear


Slip T.O.F. detector assemblyFront cover detector assembly


Lever drive coil (type B)

Carriage unit

Paper feed motor

N.E. detector assembly

Lever drive coil (type A)Lever motor T.P. detector assembly

Lever drive motor assembly

Slip B.O.F. detector assembly



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Assembling the TM-U675/U675P

Pre-assembly

Pre-assembly of the Insulator Spacer Assembly

1. Attach the insulator spacer to the rubber insulator spacer.

Figure 2-84

Pre-assembly of the IF Circuit Board Assembly

1. Attach the RS-232 I/F circuit board assembly to the connector plate (type AA) and tighten the screws.

2. Attach the parallel I/F circuit board assembly to the connector plate (type BA) and tighten the screws.

Figure 2-85

Note:The “connector plate (type AA)” is not supplied as a service part.

The service part “RS232 I/F circuit board unit” is supplied with the “connector plate (type AA)” attached.

113 Rubber insulator spacer

114 Metallic insulator spacer

107 Screw(C.P.S-tite(0), 3X6)

107 Screw (C.P.S-tite(0), 3X6) 107 Screw (C.P.S-tite(0), 3X6)

107 Screw (C.P.S-tite(0), 3X6)

155 Hexagon lock screw (inch type)

202 Parallel I/F circuit board unit

155 Screw (C.P.S-tite, 3X6)

123 Connector plate (type BA)

202 RS-232 I/F circuit board

unit

123 Connector plate

(type AA)



Pre-assembly of the N. E. Detector Assembly

1. Attach the hexagon lock screw to the N. E. detector holder.

2. Attach the N. E. detector lever to the N. E. detector holder. Check how the lever moves two to three times.

3. Fix the micro switch to the N. E. detector holder with one screw. Attach in the direction shown in the figure.

Figure 2-86

119 Micro switch

118 Screw (C.B.B-tite, 2X8)

117 N.E. detector lever

116 N.E. detector holder

120 Hexagon nut


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Assembly of the TM-U675

1. Attach the main circuit board unit to the main plate sub assembly with six screws.

Note:Components and the firmware program used on the main circuit board unit differ according to the configuration. Use the main circuit board unit that is appropriate for your configuration.

2. Attach the strengthening plate B to the main plate sub assembly with three screws.

Figure 2-87

133 Main plate sub assembly

106 Screws (C.B.S-tite F, 3X6)

135 Strengthening plate


107 Screws (C.P.S-tite(0), 3X6)



201 Main circuit board unit


3. Insert the two tabs on the mechanism assembly (M-U675) into the two slits in the
strengthening plate.

4. Position the nibs and nib holes shown in the illustration and attach the two insulator spacer assemblies. The flange of the metallic insulator spacer should be facing downward.

5. Fasten the mechanism assembly (M-U675) using one screw.

Figure 2-88


600 Mechanism assembly (type BB)

Insulator spacer assemblies

Nibs

Nib holes

Flange of the metallic insulator spacer


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6. Connect the power switch cable assembly to the main circuit board unit.
7. Connect the control panel cable to the main circuit board unit.

8. Pass the N. E. detector assembly unit lead wire through the hole in the plate and connect to the main circuit board unit.

Figure 2-89

205 N.E. detector assembly lead wire

203 Power switch cable assembly

Main circuit board unit

207 Control panel cable


9. Pass the power switch cable assembly between the L-shaped piece in the main plate sub
assembly and the QM6 element on the main circuit board unit, as shown in the illustration.

10. Use insulated tape on the areas shown in the illustration to secure the power switch cable assembly temporarily.

11. Connect the two circuit board FFCs to the main circuit board unit and the mechanism assembly (M-U675) in that order. Bend the FFCs so that the fold is on the main circuit board side.

Figure 2-90

206 Circuit board FFC

Tape


QM6


L-shaped piece in the main plate sub assembly


Confidential
Note:
Perform the following step only if your printer has a MICR unit.

12. Connect the MICR cables (two connectors). Put the excess cable into the opening as shown in the illustration.

Figure 2-91


13. Fix the control panel circuit board assembly to the mechanism assembly (M-U675) with one
screw.

14. Connect the control panel cable to the control panel circuit board assembly. Route the wiring so that the control panel cable is positioned under the L-shaped part shown in the illustration.

Figure 2-92

204 Control panel circuit

board assembly


207Control panel cable

L-shaped part


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15. Attach the rubber feet to the lower case.
16. Attach the mechanism assembly (M-U675) to the lower case with four screws. Align the mechanism assembly (M-U675) with the lower case nibs.

CAUTION:Be careful not to allow the power switch cable assembly to become pinched.

Figure 2-93


112 Plain washer (4.2X1X12)


124 Rubber foot

124 Rubber foot

124 Rubber foot


127Lower case


17. Remove the tape that is temporarily holding the power switch cable assembly and attach the
switch to the lower case. Assemble so that the “O” mark is on the left side and the “I” mark is on the right side.

Figure 2-94



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18. Attach the roll paper receive roller to the roll paper holder.
19. Attach the N. E. detector assembly to the roll paper holder.

20. Fit the N. E. detector spacer onto the N. E. detector adjustment screw, and attach the N. E. detector assembly to the paper roll holder.

21. Fit the holder spring onto the holder plate (type A), and attach to the roll paper holder.

Figure 2-95

154 Roll paper receive roller154 Roll paper receive roller

121 N.E. detector spacer

142 Holder spring

141 Holder plate (type A)

143 Roll paper holder

125 N.E. detector adjustment screw

142

141143


22. Lubricate the hole in the axis of the take-up gear.
23. Insert the take-up spring into the take-up pulley while aligning the craw on the spring into the pulley.

24. Remove the take-up pulley and lubricate the take-up spring attached to the take-up gear. Reattach the take-up pulley.

25. Attach the take-up gear to the take-up frame assembly.

Figure 2-96

151 Take-up spring

146 Take-up gear

152 Take-up pulley

105 E-ring (2)

147 Take-up frame assembly

G-36

G-36


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26. Connect the N. E. detector lead wire to the micro switch on the N. E. detector assembly.
27. Fasten the N. E. detector lead wire using a nylon clamp and tighten one screw. Pinch the core of the N. E. detector lead wire and tighten the screw.

Figure 2-97



101 Screw (C.B.P-tite, 3x8)


28. Attach the roll paper holder to the lower case. Touch the roll paper holder against the
mechanism assembly and tighten the two screws while pushing to the back left side.

Figure 2-98


103 Screws (C.P.T-B, 3X10)


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29. Attach the take-up frame assembly to the roll paper holder with two screws. Touch the take-
up frame assembly against the main unit mechanism and roll paper holder ribs.

Figure 2-99

103 Screw (C.P.T-B, 3X10)





30. Hang the paper take-up belt onto the take-up pulley. Then, hang to the take-up gear of the
mechanism assembly. Place the lower side of the belt onto the belt plate. Hang the take-up pulley first. Then, hang on the take-up drive gear on the mechanism assembly (M-U675).

Figure 2-100

153 Paper take-up belt

1

2


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31. Fit the support plate and the table holder into the lower case.
Figure 2-101

137 Support plate

138 Table holder


32. If you have a new upper case, there is a plate for support to prevent damage during
shipment. Cut this plate in the manner shown in the illustration below.

33. Snap fit the back case to the upper case to attach.

Figure 2-102

128 Upper case

129 Back case

CUT

CUT


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34. Attach the upper case to the lower case.
Figure 2-103

128 Upper case

127 Lower case


35. Before aligning the tabs on the upper and lower cases, pass the cable wire for the paper
ejection detector cable assembly (type A) through the slit in the upper case.

NoteDo not confuse with the cable wire for the paper ejection detector cable assembly (type B).

Figure 2-104

737 Paper ejection detector cable assembly (type A)

Slit

738 Paper ejection detector cable assembly (type B)


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36. Align all tabs on the upper and lower cases. When doing so, do not allow the cable wire to
become pinched between the cases.

37. Push the cable wire for the paper ejection detector cable assembly (type A) connector into the hole in the upper case. Then, route the cable wire for the paper ejection detector cable assembly (type B) as shown in the illustration at right, so that it is not in the way of the ribbon cassette.

Figure 2-105


38. Pass the flat cable for the control panel unit through the slit in the front case and attach the
control panel unit to the front case. Snap fit the switch panel unit in the order indicated in the illustration.

Figure 2-106

130 Front case

134 Control panel unit

Slit

12


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39. Attach the clamp to the front reinforcement frame.
40. Connect the control panel unit cable to the control panel circuit board assembly.

41. Attach the front case. Align with the hole in the front case and attach. When doing so, the flat cable for the control panel unit should be on top of the cable wire for the control panel cable.

CAUTION:If the flat cable for the control panel unit is not on top of the cable wire for the control panel cable, there is the possibility that the flat cable could be too short.

42. Fasten the front case using two screws.

Figure 2-107

103 Screw (C.P.T-B, 3X10)

110 Clamp

104 Screw (C.C., 4X20)

130 Front case

Flat cablefor control panel unit

Cable wirefor control panel cable


43. Place the take-up assembly above the main unit mechanism. Lubricate the sliding parts of
the take-up assembly and the take-up frame assembly.

Figure 2-108

126 Take-up assembly

G-36

G-36


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44. Attach the rear sound absorption material and the operation label (type AA) to the roll paper
cover.

45. Attach the roll paper cover to the back case.

Figure 2-109

132 Roll paper cover

139 Operation label (type AA)

145 Rear sound absorption material


46. Attach the front sound absorption material to the ribbon cassette cover.
47. Attach the ribbon cassette cover to the upper case. Align the hinges on the ribbon cassette cover with the nibs and attach.

Figure 2-110

131 Ribbon cassette cover

144 Front sound absorption material

1

2


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48. Attach the I/F circuit board unit to the main circuit board unit with two screws.
Figure 2-111

I/F circuit board unit

107Screws (C.P.S-tite(0), 3X6)


49. Attach the lower plate and the IC cover to the main plate sub assembly with five screws.
When doing so, check that the wiring of the power switch cable assembly is as shown in Figure 2-89.

Figure 2-112

136 Lower plate

111 IC cover



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50. Attach the three screws for fastening the display module (option).
Figure 2-113



51. Fasten the upper case and lower case by tightening the two screws.
Figure 2-114

103 Screws (C.P.T-B, 3X10)


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52. Affix a caution seal.
53. Affix an operation label (type BA).

54. Affix an operation label (type DA).

55. Affix a front seal.

56. Affix a head caution seal.

Figure 2-115

57. Attach paper path spacers to allow printing without roll paper if the printer model supports paper path spacers. (See Addendum 1.)

58. Perform the following adjustments and settings. (See Chapter 3, Adjusting and Setting. For the printer model that supports paper path spacers, also see Addendum 1.)

• Platen gap adjustment

• Setting threshold values for detectors

59. If the customer sent you a printer model that supports paper path spacers but the paper path spacers were removed, remove the spacers from the repaired printer before returning it. (See Addendum 1.)

149 Operation label (type DA)

162 Head caution seal

122 Caution seal

140 Operation label (type BA)

148 Front seal



Chapter 3Adjusting and Setting

Before Adjusting and Setting

Always observe the following precautions when adjusting and setting.

CAUTION:Always remove the power supply unit from the printer before working.There is power flowing in the internal circuit board even if you turn off the printer power supply switch. You can damage the printer if you work when the power supply is still attached.

Remove all peripheral equipment connected to the printer before starting your work.

Do not perform any work that is not described in this chapter. Doing so can result in injuries or damage to the printer.

Do not touch the flexible plastic cable (FPC) or the FFC pins with your hands.

Rev. B Adjusting and Setting 3-1

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Phase Adjusting
Perform phase adjustments when you have removed or replaced any of the following.

1. Press the tab of the lever drive coil (type B).

Figure 3-1

Items Requiring Phase Adjustment

The lever drive gear.

The lever drive transmission gear.

The platen lever drive cam.


Claw when raised Claw when pushed

3-2 Adjusting and Setting Rev. B

2. While pressing the tab of the lever drive coil (type B), rotate the lever motor reduction gear
in the direction indicated in the illustration, so that the protrusion on the lever drive gear faces the very bottom of the printer.

Figure 3-2

3. Remove your finger from the claw of the lever drive coil (type B). Check that the claw returns to its original position. Redo from step 1 if it has not returned to its original position.

Figure 3-3

A

A

A

Lever motor reduction gear

Lever drive gear protrusion

Lever drive gear



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4. Rotate the lever motor reduction gear. Continue until the lever drive gear no longer rotates.
Figure 3-4


Lever drive gear


5. While the printer is in that state, attach the lever drive transmission gear to the lever drive
transmission gear axis. (Using one E-ring.)

Figure 3-5

Lever drive gear

Lever drive transmission gear


E-ring


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6. Lubricate the platen lever drive cam shaft.
7. Assemble the platen lever drive cam to the platen lever drive cam shaft (Using one E-ring). Set so that the three gear teeth of the platen lever drive cam are facing downward.

Figure 3-6

G-36

Three teeth of the gear

Platen lever drive cam

E-ring




E-ring



Figure 3-7

Lever drive gear



Tab of the lever drive coil ( type B )


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Adjusting the Platen Gap
Adjust the platen gap when you have performed either of the following:

Use the following steps to adjust the platen gap.

1. Connect the power supply unit to the printer. Turn on the printer power switch. Turn off the printer power switch when the printer finishes the power on test. Remove the power supply unit from the printer. (This procedure will close the platen.)

Note:When you are adjusting the platen gap, you must close the platen. There are instances where the platen is open on this printer after assembly because of positioning of the gears and cams. Therefore, you must always use the procedure in step to close the platen.

2. Remove the ribbon cassette cover. (See page 2-109.)

3. Remove the carriage cover frame assembly. (See page 1-16.)

4. Use 0.45 mm and 0.50 mm thickness gauges. Insert the thickness gauges from the side of the print head unit, as shown in the figure below.

Figure 3-8

Platen Gap Adjustment

Replaced or removed the print head unit.

Disassembled or re-assembled the TM-U675/U675P printer.


5. Using the thickness gauges, adjust the platen stopper screws so that the positions indicated
below are 0.5 ± 0.05 mm.

The stopper screws for the platen set are located here.

Figure 3-9

Note:Adjust the platen gap to meet the following conditions (0.5 ± 0.05 mm).

The 0.45 mm thickness gauge falls under its own weight.

The 0.50 mm thickness gauge is pinched and will not fall between the platen and the print head unit.

6. Attach the ribbon cassette cover and the carriage cover set frame.

20 mm 40 mm

0.5 +/- 0.05 mm

Adjustment Screw Gauge

Print Head

Adjustment Screw


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Setting Threshold Values for Detectors
Perform this setting when you have removed or replaced any of the following.

CAUTION:Work indoors to avoid direct sunlight when doing the following. Use normal fluorescent lighting available in most rooms. You will not be able to make accurate adjustments if there is natural light (sunlight) or man-made light sources (lamps, etc.) other than fluorescent lighting. Allow all the light from the fluorescent lighting to enter the printer when working. You will not be able to make accurate adjustments if you allow a shadow to fall on the printer or you turn OFF the fluorescent lighting while working.

Note:The procedures for the TM-U675 model that supports paper path spacers to allow printing without roll paper are different from the procedures described in this section.

See Addendum 1 for the procedures to set the threshold values on a printer model that supports the paper path spacers.

1. Install the roll paper.

Note:You must have roll paper installed to make accurate settings.

2. Remove slip paper if it is inserted.

Note:You cannot make accurate settings if there is slip paper present.

3. Connect the power supply to the printer.


5. Turn on the power switch for the printer while holding down the FEED button and the RELEASE button at the same time.

6. Press the RELEASE button 7 times.

Items Requiring Setting

The slip T. O. F. detector assembly.

The slip B. O. F. detector assembly.

The paper ejection detector assembly.

The validation detector assembly.

The mechanism assembly.

The main circuit board unit.


Note:The printer will automatically set the detectors. The main circuit board will store the setting values.


Confidential



Appendix AService Tools and Lubricants

Table A-1 Service tools required

Tool Size Purpose

Gap gauges <Thickness>0.45 mm x 10.50 mm x 1

To adjust the platen gap.

Crosshead screwdriver No. 0, 1 and 2 Other assembly/disassembly

Flathead screwdriver — Other assembly/disassembly

Tweezers — Other assembly/disassembly

Soldering iron — Other assembly/disassembly

Wrist band — Other assembly/disassembly

E-ring holder 1.2, 1.5, 2.0, 2.3, 3.0, 4.0, and 5.0

Other assembly/disassembly

Hexagon box driver 5.5 mm Other assembly/disassembly

Table A-2 Lubricants

Lubricant

O-10

G-36

G-47

G-48

Rev. B Service Tools and Lubricants Appendix A-1

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Appendix A-2 Service Tools and Lubricants Rev. B

Appendix BMaintenance
Maintenance and Inspection

Perform maintenance and inspection to prevent trouble and maintain the fine, initial performance of this printer for a long time.

There are two types of maintenance and inspection of this printer, based on the technical skill required: “Daily Inspection” and “Periodic Inspection.”

Daily Inspection Items that can be inspected easily and handled by a user of this printer.

Periodic Inspection Items that are inspected and handled by a person who has technical knowledge.

Daily Inspection

Table B-1 Daily inspection checklist

Items to Check Checkpoints Handling

Printer setup The connector cables are plugged in. Reconnect cables.

The roll paper and ribbon cassette are properly installed.

Install them properly.

The ribbon is routed properly in the printer.

The ribbon is not damaged. Replace the ribbon cassette.

The roll paper cover is closed. Close the cover.

The front cover (ribbon cassette cover) is closed.

Paper dust or particles in the printer

Open the roll paper cover. There should be no large paper particles or foreign matter inside.

Remove the paper particles or foreign objects.

Use a small vacuum cleaner for computer equipment to clean thoroughly.

Open the front cover (ribbon cassette cover). There should be no large paper particles or foreign matter inside.

Remove the paper particles or foreign objects.


Rev. B Maintenance Appendix B-1

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Periodic Inspection
Table B-2 Periodic inspection checklist

Items to Check Checkpoints Handling When to Perform

Status of paper dust, dirt, dust adhering to the parts

Is there a great deal of dirt, or dust adhering to the parts?


Twice a year

Is there paper dust at each of the following detectors and in the slip paper path? Slip T. O. F. detector Slip B. O. F. detector Paper ejection detector Validation detector H. P. detector

Use an air spray can to blow out paper dust.

Twice a year

Is the receipt side platen roller white with paper dust?

Dampen a cloth with a small amount of water and wipe the roller surface.

Twice a year

Spring shapes Are springs deformed or loose? Reattach or replace the springs. Twice a year

MICR status Check to see if reading can be performed and checks can be inserted.

Clean the MICR head (see page B-3).

Once a year or every72,000 passes

Lubrication status Check the lubrication. See Appendix G “General Lubrication Point Diagrams.”

Twice a year

Operation check Are there any abnormal noises or printing errors when operating?

See Chapter 1 “Troubleshooting.” Twice a year

Appendix B-2 Maintenance Rev. B

MICR Cleaning
It is recommended that you clean the MICR head periodically (generally once a year or every 72,000 passes) to maintain the accuracy of the MICR reading.

Use a damp-type cleaning sheet to clean the MICR head.

CAUTION:Do not use an adhesive-type cleaning sheet.

Note:Generally, clean once a year or every 72,000 passes. Adjust the timing of each cleaning according to the operating conditions.

Cleaning Sheet Standards

Use the following commonly sold cleaning sheet.

PRESAT brand (KIC) “CHECK READER CLEANING CARD” or the equivalent product (damp-type cleaning sheet).

Procedures for Cleaning

You can clean in the following modes. Select the mode when you start cleaning.

Self mode

Command mode

When Cleaning in the Self Mode

1. Load roll paper in the printer.

2. Turn OFF the power supply to the printer.

3. Open the receipt cover.

4. Turn the power supply ON while pressing the RELEASE button.

5. Press the RELEASE button seven times.

6. Close the receipt cover.

Rev. B Maintenance Appendix B-3

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7. The following message prints on the roll paper (receipt side) and the SLIP LED flashes.
8. Insert the cleaning sheet into the printer in the same way as a check.

CAUTION:Insert the cleaning sheet in the correct direction.

9. After the cleaning sheet is ejected, press the RELEASE button once and remove the sheet.

CAUTION:Do not reuse cleaning sheets.

10. Turn OFF the power supply to the printer.

When Cleaning in the Command Mode

1. Execute the MICR cleaning command FS c.

2. Insert the cleaning sheet into the printer in the same way as a check.

CAUTION:Insert the cleaning sheet in the correct direction.

3. After the cleaning sheet is ejected, press the RELEASE button once and remove the sheet.

CAUTION:Do not reuse cleaning sheets.

**** RECOGNITION MODE ****

Please set check.

Appendix B-4 Maintenance Rev. B

Appendix CInstallation
You can connect up to four cables to the printer. They all connect to the connector panel (on the bottom rear of the printer), which is shown below.

Figure C-1 Connector panel

Note:This illustration shows the serial interface model. If you have the parallel interface model, your interface connector will look different.

Before connecting any of the cables, make sure that both the printer and the host PC are turned off.

Connecting to the Host PC

You need an appropriate serial interface or parallel interface cable to connect your computer to the printer. For the serial model use a null modem cable, and for the parallel model use an IEEE 1284 cable.

Note:It is important that you use a null modem cable with the serial interface model. Do not use any other type of serial cable.

1. Plug the cable connector securely into the printer’s interface connector.

2. If the cable connector has screws on it, tighten the screws on both sides of the connector.

Figure C-2 Tightening the screws

Rev. B Installation Appendix C-1

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Note:Your printer has inch-type hexagonal lock screws installed. If your interface cable requires millimeter-type screws, replace the inch-type screws with the enclosed millimeter-type screws using a hex screwdriver (5 mm).

Figure C-3 Inch screw and millimeter screw

3. If your interface connector has a grounding wire, attach it to the printer using the screw labeled FG, which is next to the interface connector.

4. Attach the other end of the cable to the host PC.

Connecting the Drawer

WARNING:Use a drawer that matches the printer specification. Using an improper drawer may damage the drawer as well as the printer.

Do not connect a telephone line to the drawer kick-out connector; otherwise the printer and the telephone line may be damaged.

Plug the drawer cable into the drawer kick-out connector on the connector panel in the location indicated below.

Figure C-4 Connecting the drawer

inch screw millimeter screw

There is a line mark on the side

drawer kick-out connector

Appendix C-2 Installation Rev. B

Connecting to a Direct Connection Display Module
WARNING:Be sure not to connect this cable to the drawer kick-out connector, which is next to the power connector.

Also do not connect a telephone line to the display module connector.

Note:The DM connector can be used only with the serial interface model of this printer.

1. Make sure that the printer is turned off.

2. Plug the cable connector (provided with the direct connection display module) securely into the printer's display module connector until it clicks.

Figure C-5 Connecting to a direct connection display module

DM connector

Rev. B Installation Appendix C-3

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Power Connection
Use the optional EPSON PS-170 power supply or equivalent for your printer.

WARNING:Make sure you use the EPSON PS-170 power supply or equivalent. Using an incorrect power supply may cause fire or electrical shock.

CAUTION:When connecting or disconnecting the power supply from the printer, make sure the power supply is not plugged into an electrical outlet. Otherwise you may damage the power supply or the printer.

If the power supply’s rated voltage and your outlet’s voltage do not match, contact your dealer for assistance. Do not plug in the power cord. Otherwise you may damage the power supply or the printer.

1. Make sure the printer’s power switch is turned off, and the power supply’s power cord is unplugged from the electrical outlet.

2. Check the label on the power supply to make sure the voltage required by the power supply matches that of your electrical outlet.

3. Plug the power supply cord into the connector shown below.

Figure C-6 Power connection

Note:To remove the DC cable connector, make sure the power supply’s power cord is unplugged; then grasp the connector at the arrow and pull it straight out.

power supply connector

Appendix C-4 Installation Rev. B


Appendix DProduct OverviewComponent Functions

Figure D-1

Figure D-2

Figure D-3

Front cover

Paper roll cover

Control panel

Interface connector (*)

DM connector Drawer kick-out connector

Power supply connector

(*) This illustration shows the serial interface model. The parallel interface connector looks slightly different.

DIP switch cover

Rev. B Product Overview Appendix D-1

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Outline of Printer Mechanism
Printing Mechanism

This mechanism consists of the print head unit, which has nine wires vertically arranged in one row, the head carriage assembly, platen, carriage motor, carriage drive pulley, carriage guide shaft, carriage transmission pulley, and carriage transmission belt. (See Figure D-4.)

Figure D-4

Platen

Print head unit

Carriage drive pulley

Carriage motor gear

Head carriage assembly

Carriage transmission belt

Carriage transmissionpulley

Carriage guide shaft

Appendix D-2 Product Overview Rev. B


Movement of print head unit

When the carriage motor rotates the carriage motor gear in the direction shown by the white arrow, the driving force is transmitted sequentially to the carriage drive pulley and carriage transmission belt, moving the head carriage assembly, which is fixed to the carriage transmission belt, in the direction indicated by the white arrow. (See Figure D-5.)

Figure D-5

Printing operation

Wire movement when printing one dot

1. When an electrical pulse is applied to the drive coil, the steel core is excited, and the operation plate is pulled in the direction indicated by black arrow. At this time, the dot wire is pressed against the operation plate by the force of the wire return spring. The force of the operation plate pushes the dot wire out towards the platen (in the direction indicated by black arrow).

2. The dot wire prints a dot when it strikes the platen through the ink ribbon and paper.


Carriage motor gear

Print head unit

Carriage transmission belt

Head carriage assembly


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3. When the electrical pulse to the drive coil ends, the dot wire and operation plate are
returned to the standby status by the spring force of the wire return spring and operation plate spring. (See Figure D-6.)

Figure D-6

Operating plate Wire return spring

Dot wire

Paper

Wire guide

Ink ribbon

Platen

Core

Drive coil



Printing operation when printing one character

This section explains the printing operation for a 9 9 dot matrix.

Characters are printed by energizing the print solenoids at a timing corresponding to the head carriage movement position, using the carriage motor phase change signal as a reference signal. The print head unit moves approximately 0.339 mm with a one step rotation (7.5°) of the carriage motor.

To print the number "2," print solenoid numbers 2 and 9 are energized in sync with the carriage motor phase change signal. Next, print solenoid number 8 is energized in sync with TnH, delayed by a half dot time interval. The number "2" is printed by repeating this process.(See Figure D-7.)

Figure D-7

TnH Tn4(H)

Tn

Print solenoid 1

Carriage motor phase switching timing

2

3

4

5

6

7

8

9

Tn+2 Tn+4Tn+1 Tn+3 Tn+5


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Platen open/close operation
The platen adjustment screw attaches the platen to the platen lever. The platen opens and closes to prepare for feeding a slip, check, or validation sheet. When the lever coil is energized while the lever drive motor rotates, it releases the linkage of the lever ratchet wheel to the paper feed trigger attraction plate, and the lever drive gear rotates the prescribed amount in the direction shown by the arrow. This rotation is transmitted by the lever drive transmission gear, rotating the platen lever open/close cam 180°. The platen lever moves in the direction indicated by arrow a around the platen lever shaft, and the platen and slip feed roller open. (See Figure D-8.)

To close the platen, the lever drive coil is energized again while the lever drive motor rotates, turning the lever drive gear the prescribed amount in the direction of the arrow. This rotates the platen lever open/close cam 180°, and the platen lever is moved in the direction shown by arrow b around the platen lever shaft by the slip retainer spring. The slip feed roller and slip hold roller make contact at this time, closing the platen.

Figure D-8

Validation paper

Platen lever shaft

Platen lever

Slip feed roller

Platen

Slip hold rollerPlaten leverdrive cam


Lever drive gear

a

b



Detection Mechanism Unit

The detection mechanism unit is comprised of the following mechanisms.

* The roll paper near end detector mechanism is installed on the paper supply unit.

Figure D-9

Table D-1 Detection mechanism unit functions

Mechanism Function


Initial setting of printer (carriage home position)

Carriage detection mechanism

Detection of head carriage malfunction

B.O.F. detection mechanism Slip detection

T.O.F. detection mechanism Slip detection


Slip detection

Roll paper end detection mechanism


*Roll paper near enddetection mechanism


Validation detector mechanism

Validation paper detection

Lever motor T.P. detection mechanism

Lever drive motor timing signal detection

Front cover detection mechanism

Front cover open/closed status detection

Rear cover detection mechanism

Detects the open/close status of the rear cover

Roll paper N.E.detector (micro switch)



Front cover detector assembly

Home position detectorassembly

Lever motor T.P. detectorassembly


Carriage detectorassembly

T.O.F. detectorassembly

B.O.F. detectorassembly

Roll paper end detector assembly


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The home position detection mechanism is located at the left end of the head carriage assembly. This mechanism keeps track of the head carriage assembly movement position. The initial setting is made by sensing the detection plate at the rear of the head carriage assembly.

The home position detector consists of an LED and photo IC. When the head carriage assembly is moved, the detection plate passes between the LED and photo IC. The photo IC output level changes when the light rays are interrupted. This change in output level is used as a detection signal for the head carriage movement position.

Figure D-10

Carriage detection mechanism

The carriage detection mechanism uses a rotary encoder interlocked to the carriage motor gear to detect abnormal carriage motor rotation.

This mechanism is comprised of the carriage drive transmission gear and carriage detector, which are located on the carriage motor shaft.

The carriage detector consists of an LED and phototransistor.

The driving force generated by the carriage motor is transmitted to the carriage motor gear, carriage drive pulley, carriage belt, carriage transmission pulley, and the carriage drive transmission gear, which is located at an equal interval on the inside of the gear, where the screening plate is located. When the carriage drive transmission gear is rotated by the driving force of the carriage motor, the screening plate passes between the LED and phototransistor.

The output level of the phototransistor changes at this time, since the light rays are interrupted.

This output level is used as the detection signal for carriage motor rotation.

Figure D-11

GND

High

+5V

GND

Low

When light is interrupted

When light is emitted

Printer side

Head carriage detector assembly

Signal level at point A

GND

High

+5V

GND

Low



Printer side

Screening plate




Figure D-12

Bottom of form (B.O.F.) detection mechanism

The B.O.F. detection mechanism detects whether or not slip paper has been inserted, and detects the rear edge of the paper when printing is performed.

The mechanism is located near the right end of where paper is inserted to ensure it can determine whether or not a slip has been inserted and for proper positioning.

The B.O.F. detector is comprised of an LED and phototransistor. When a paper slip is inserted, the light rays between the LED and photo resistor are interrupted, resulting in a change in the phototransistor output level.

This change in output level is used as a detection signal to determine whether or not a slip has been inserted.

Figure D-13

Top of form (T.O.F.) detection mechanism

The T.O.F. detection mechanism detects whether or not a slip has been inserted. The mechanism is located near the top (before the form stopper) to ensure it can determine whether or not a slip has been inserted and for proper positioning.

Carriage belt


Screening plateCarriage drive transmission gear

Carriage transmission pulley

Carriage motor gear

Carriage detector

GND

High

+5V

GND

Low



Printer side

Paper guide

Slip paper

Slip paper

Document table

B.O.F detector assembly



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The T.O.F. detector is comprised of an LED and phototransistor. Reflected light is used to determine whether or not a slip has been inserted.
When a slip is inserted, light emitted by the LED is reflected, resulting in a change in the phototransistor output level.

This change in output level is used as a detection signal to determine whether or not a slip has been inserted.

Figure D-14


The paper ejection detection mechanism detects whether or not a slip has been inserted. The mechanism is located on the head cover for the slip paper ejection port to ensure it can determine whether or not paper remains in the unit after the slip ejection operation has taken place.

The paper ejection detector is comprised of an LED and phototransistor. Reflected light is used to determine whether or not the slip has been ejected.

When a slip reaches the paper ejection detector after printing is performed and the slip is fed, light emitted by the LED is reflected, resulting in a change in the phototransistor output level.

This change in output level is used as a detection signal to determine whether or not a slip is present.

Figure D-15

GND

High

+5V

GNDLow



Printer side

Slip paper


GND

High

+5V

GNDLow



Printer side

Slip paper




Roll paper end detector mechanism

The roll paper end detector mechanism detects the presence of roll paper. It is located behind the sub paper feed roller in the roll paper feed path so that it can detect the insertion of paper when semi-automatically loading roll paper.

The roll paper end detector includes an LED and a phototransistor. The reflection of light is used to detect the presence of paper.

When there is paper in the feed path, or when you are performing semi-autoloading, LED light is reflected when the roll paper is inserted. This changes the output level of the phototransistor. The change in output level is detected and is used as the detection signal for the presence of roll paper.

Figure D-16

GND

High

+5V

GNDLow



Printer side

Roll paper



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Roll paper near end detector mechanism
The roll paper near end detector mechanism is made up of the N.E. detector lever and a microswitch. It is attached to the right side of the paper feed unit, and it detects the amount of roll paper remaining.

The tip of the N.E. detector lever is pushed against the edge of the roll paper by a spring built into the microswitch. Therefore, the N.E. detector lever touches the edge of the roll paper when there is a substantial amount of roll paper remaining, which keeps the microswitch turned ON, as shown in the following illustration. The tip of the N.E. detector lever moves in the direction of the arrow as the amount of roll paper remaining becomes lower than the prescribed amount. The tip of the N.E. detector, thus, moves toward the core of the roll paper center thereby turning OFF the microswitch to generate a detection signal.

Figure D-17

Validation detector mechanism

The validation detector mechanism is located near the bottom of the paper insertion position to detect the presence of a validation sheet.

The validation detector mechanism includes an LED and a phototransistor. Reflected light is used to detect the presence of paper. Inserting validation paper causes the LED light to reflect, which changes the output level of the phototransistor.

This detector mechanism detects the change in output level and outputs a detection signal for the presence of the validation paper.

Figure D-18

Unit case

Roll paper

Micro switch

N.E. detector lever

Roll paper axis center

Roll paper axis center

GND

High

+5V

GNDLow



Printer side

Validation paper




Lever motor timing pulse (T.P.) detection mechanism

The lever motor T.P. detection mechanism consists of a lever drive motor detector plate and lever motor T.P. detector on the lever drive motor gear. It detects lever drive motor rotation and generates the signal, which determines the timing for energizing of the lever coil, which in turn controls opening/closing of the platen lever and opening/closing of the sub slip feed roller.

Figure D-19

Figure D-20

Lever drive motor

Lever drive motor detector plate

Lever drive motor gear

Lever motor T.P. detector

GND

High

+5V

GND

Low



Printer side

Lever drive motor detector plate



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Front cover open detection mechanism
The front cover open detector is located at the right side of the printer mechanism, and detects opening and closing of the front cover. This detector consists of an LED and phototransistor. A screening part, located on the rear of the cover, interrupts light rays when the cover is closed. When the cover is opened, the light rays reach the phototransistor, resulting in a change in its output level. This change in output level is used as a detection signal to determine when the front cover is open.

Figure D-21

Rear cover detector mechanism

The rear cover detector is located in the back, right side of the printer mechanism. It detects whether the rear cover is open or closed. This detector is comprised of an LED and phototransistor. When the cover is closed, the light interrupter on the back of the cover interrupts the optical axis. When the cover is open, the optical axis is opened, which changes the output level of the phototransistor. The detector takes this output level as the detection signal for the rear cover open detector.

Figure D-22

GND

High

+5V

GND

Low

Printer side

Front cover light interrupter unit




GND

High

+5V

GND

Low

Printer side

Rear cover light interrupter unit






Roll Paper Feed Mechanism

This mechanism mainly includes the paper feed motor, J/S change assembly, roll paper feed gears, and the paper feed unit. Paper feeds are performed by switching the power from the paper feed motor between the roll paper feed and slip paper feed by the J/S change assembly. This explains the operation for roll paper feeds.

Figure D-23

Roll paper insertion operation (semi-autoloading)

When the platen lever open/close cam is in the idle position, the sub paper feed rollers and sub paper hold rollers in the paper feed unit are open. (See "Platen open/close operation" earlier in this appendix.) When the leading edge of paper is manually inserted into the opening, the paper end detector built into the paper feed unit detects its presence. The platen lever open/close cam rotates and the sub paper feed roller and sub paper hold rollers close to grasp the paper and the rotation of the paper feed motor starts the semi-autoloading.

As shown in Figure D-24, when idling, the platen lever open and close cam holds the platen lever in the direction of arrow a and the paper guide lever in the direction of arrow c. The auxiliary paper guide spring force holds the auxiliary paper guide in the direction of arrow e. When roll paper is inserted and the paper end detector detects the edge of the paper, the lever drive motor is started and the platen lever open and close guide operates. The platen lever spring holds the platen lever in the direction of arrow b. The paper guide lever spring holds the paper guide lever in the direction of arrow d while the paper feed motor drives and starts semi-

Paper feed unit

Main frame

Roll paper feed gears

Paper feed motor

J/S change assembly

Release lever


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autoloading. The semi-autoloaded paper roll passes through the paper path past the platen lever, and then passes to the front side of the platen to be guided to the auxiliary paper guide. It is guided outside the paper feed unit after passing the area where the paper feed roller and paper pressing roller are pressed together. The roll paper that has passed out of the paper feed roller is directed up by the protrusions in center of assist paper guide, and the assist paper guide is rotated in the direction of arrow f and is closed. (See Figure D-25.)
In this configuration, you cannot insert roll paper to the paper feed roller in slip mode.

Figure D-24

Roll paper

Protrusions

Assist paper guide

Paper hold roller

Paper hold roller shaft

Paper guide roller

Sub paper feed roller

Sub paper feed shaftPaper end detector

Paper feed roller shaft

Paper feed frame

Guide roller

Platen

Platen lever

Paper feed lever center shaftPaper guide lever

Sub paper hold roller

a

b

cd

e

f



Figure D-25

Paper feed operation

The power from the paper feed motor is transmitted to the paper feed roller and sub paper feed roller using the following set of gears.

1. Paper feed motor gear

2. Paper feed transmission gear

3. J/S change gear

4. Paper feed reduction gear

5. Take-up drive gear

6. Paper feed gears

Roll paper

Protrusions

Assist paper guide

Paper hold roller


Paper guide roller


Sub paper feed shaftPaper end detector


Paper feed frame

Guide roller

Platen

Platen lever

Paper feed lever center shaftPaper guide lever



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The paper feed rollers and paper hold rollers and the sub paper feed rollers and sub paper hold rollers are pressed together. They feed the roll paper that has been fed by the roll paper insert operation. (See Figure D-26.) The paper feed roller feeds paper the prescribed amount, but the sub paper feed roller is set to a paper feed amount that is slightly less than that amount. The difference in feed amounts is built into the sub paper feed roller. (See Figure D-27.) The sub paper feed clutch spring and related parts slip to prevent slack in the roll paper.
Figure D-26

Figure D-27

Roll paper

Paper feed roller

Paper feed gears

Paper feed reduction gear Paper feed transmission gear

Paper feed motor gear

Paper feed motor

J/S change gear

Take-up drive gear

Sub paper feed rollerSub paper feed shaft


Sub paper hold roller shaft

Paper hold shaft

Paper hold roller

Paper feed shaft

Guide rollers

Guide roller shaft


Sub paper feed shaft

E-ring

Sub paper feed clutch spring

Sub paper feed roller holder

E-ring



Roll Paper take-up mechanism

This mechanism consists of a take-up frame, take-up drive gear, take-up belt, take-up gear, take-up pulley, take-up clutch, and take-up shaft, all of which ensure stable take-up operation. (See Figure D-28.)

Figure D-28

Take-up drive gear

Take-up belt

Main frame

Take-up pulley Take-up gear

Take-up frame

Take-up shaft

Paper feed unit


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Take-up operation
The take-up drive force for the printed roll paper is supplied by the paper feed motor, and is sequentially transmitted to the take-up shaft by the paper feed transmission gear, J/S change gear, paper feed reduction gear, take-up drive gear, take-up belt, take-up pulley, take-up clutch, and take-up gear. (See Figure D-29.) Take-up force is transmitted to the take-up shaft by the movement of the take-up clutch spring between the take-up pulley and take-up gear. This rotates the take-up shaft in the direction indicated by arrow a, winding up the printed paper roll.

Figure D-29

Take-up shaft

Take-up beltTake-up drive gear

Paper feed reduction gear

J/S change gear

Paper feed transmission gear


Take-up pulley(Take-up clutch) Take-up gear

Take-up frame

a



Clamshell mechanism

The clamshell mechanism consists of a paper feed unit, paper feed frame shaft, and paper feed frame fixing lever. This mechanism is used in the event of a quality problem, such as a paper jam.

Figure D-30

Opening mechanism

1. Press the on the two paper feed frame fixing levers (indicated by "arrow a" in Figure D-30).

2. The paper feed frame fixing lever comes off the main frame, allowing the entire paper feed unit to rotate on the paper feed frame shaft. (See Figure D-31.)

3. Rotate the entire paper feed unit approximately 90° in the direction indicated by arrow b. (See Figure D-31.)

Paper feed unit Paper feed frame fixing levers

Paper feed frame shaft

Main frame


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Figure D-31

Closing mechanism

1. When a paper jam or other problem has been fixed, rotate the entire paper feed unit in the opposite direction from when the mechanism was opened.

2. Lightly press down on the upper part of the paper feed unit to lock the paper feed frame fixing lever to the main frame.

Paper feed unit

Paper feed frame shaft

Main frame

b



Roll paper release operation

The roll paper release operation lets you remove pieces of roll paper that still remain when you are replacing roll paper. You can use this when there are paper jams or when you are removing pieces of paper.

The paper is released by operating the release lever beside the paper feed motor on top of the paper feed unit. The end of the release lever is located very near the paper hold roller. When you push the part of the lever labeled "PUSH" in the direction indicated by arrow b, the paper hold roller on the paper hold roller shaft is moved in the direction indicated by arrow a, releasing the connection with the paper feed roller, releasing any paper in between.

Figure D-32

Roll paper

Release lever

Paper release lever shaft

Paper hold roller spring


Paper hold roller

Paper feed roller



Paper feed frame

PUSH

b

a


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Specifically, the release lever is provided by the paper feed motor and very near the paper hold roller shaft to remove paper that interferes with the contact between the paper hold roller and paper feed roller. When you push the part of the release lever labeled “PUSH” in the direction indicated by arrow b, the release lever rotates around the pivot in the direction of arrow c, and the end of the release lever pushes out the end of the paper hold roller shaft in the direction indicated by arrow a. After the paper is released, the paper hold roller and release lever are returned to their original positions by two paper hold roller springs built into both ends of the paper hold roller shaft.
Figure D-33

b

a

Roll paper

Roll paper

Paper feed frame

Release lever pivot point axis

Release leverPaper hold roller

Paper holdroller axis


"PUSH"

c



Slip Feed Mechanism

The slip feed mechanism is comprised of the following parts:

Form stopper

Sub slip feed lever

Sub slip feed roller

Sub slip hold roller

Slip feed roller

Slip hold roller

Paper feed motor and wheel

Positioning slip paper

The slip paper path is normally interrupted by the form stopper, located perpendicular to the path, which is held in place by the form stopper spring. When a slip is inserted along the right edge of the slip guide lower frame in the direction indicated by the arrow, the slip paper goes in as far as the form stopper and is positioned. (See Figure D-34.)

When the paper feed motor rotates several times forward and reverse while energizing the J/S change solenoid, the J/S change lever will switch the J/S change gear that had been engaged with the roll paper feed gear so that it is engaged with the slip paper feed gear. (See Figure D-35.)

Figure D-34

Paper feed trigger attraction plateLever drive camSlip feed roller

Slip hold rollerSub slip hold roller

Slip guide upper frame

Slip paper

Slip guide lower frame

Sub slip feed roller Sub slip feed lever

Lever drive coil

Form stopper

T.O.F. detector assembly

B.O.F. detector assembly

ab


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Figure D-35


Main frame


J/S change gear

J/S change lever

J/S change solenoid


When the T.O.F. detector and B.O.F. detector determine that a slip has been inserted, the lever drive coil is energized while the lever drive motor is rotated. At this time, the linkage between the paper feed trigger attraction plate and lever drive ratchet wheel is disconnected, the lever drive shaft and lever drive cam rotate, and the sub slip feed lever moves in the direction indicated by arrow a. (See Figure D-34.) This pushes up the sub slip feed roller, compressing the sub slip hold roller. At the same time as this, the sub spring feed lever moves the form stopper in the direction indicated by arrow b (See Figure D-34), completing preparations for feeding the slip away from the form stopper slip path. (See Figures D-34, 36.)
Figure D-36

After this, the paper feed motor is rotated a number of steps corresponding to the slip paper format in the direction indicated by the arrow. The rotation force is transmitted to the slip feed roller and sub slip feed roller by the gears, positioning the slip paper at the top. (See Figure D-37.)


Lever drive gear

Sub slip hold roller

Sub slip feed roller

Sub slip feed lever

Form stopper

Lever drive shaft

Lever drive motor

Paper feed trigger attraction plate

Lever drive cam

Lever drive rachet wheel


Lever drive coil


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Figure D-37

Slip paper printing and paper feed operation

After the slip is positioned, printing can be performed. The paper feed motor drives the slip feed roller upon the completion of printing of one line, feeding the paper the prescribed distance. The slip paper can be fed forward or reverse by controlling the energizing signal of the paper feed motor.

The slip feed mechanism gear assembly is comprised of the following parts:

Paper feed motor gear for paper feed motor


J/S change gear (J/S change solenoid engages this with the slip paper feed gear)


Slip transmission gear

Slip drive gear

The driving force of the paper feed motor is transmitted to the slip feed roller and slip hold roller simultaneously via the gears, creating the force to feed the slip paper on the front and on the back.

Slip drive gears

Slip drive gearsJ/S change solenoid

J/S change lever

J/S change gear

Slip transmission gears




Paper feed motor

a

b

c

d

h

h

g

g

f

f

e


When the slip paper is fed forward, the respective gears rotate in the directions indicated by arrow a, arrow b, arrow c, arrow d, arrow e, and arrow f. This rotates the slip feed roller and slip hold roller in the directions indicated by arrows g and h, feeding the slip paper in the direction indicated by the arrow. When the slip paper is fed in the reverse direction, the operation is performed in the opposite direction. (See Figure D-37.)
Validation Mechanism

Feeding validation paper

When you use validation paper, the force of the drive of the paper feed motor switches to the slip paper feed gear using the J/S change mechanism.

The open/close operation (see "Platen open and close operation") moves the platen lever frame in the direction of arrow a and the slip paper roller and platen are opened. Validation paper can be inserted from the top of the printer mechanism in this state. When the trailing edge of validation paper is detected, the detection signal is output. This signal is received, the lever drive motor is started, and the platen lever moves in the direction of arrow b (in Figure D-8). This causes the slip feed roller and the slip hold roller to grasp the validation paper. The platen closes to ensure the appropriate platen gap, and printing is possible. When the printing of one line of characters is completed, the paper feed motor is driven to rotate the slip feed roller to feed the validation paper the prescribed amount in the upward direction.

Ribbon Feed Mechanism

The ribbon feed mechanism is comprised of the following parts. (See Figure D-38.)

Transmission gear

Ribbon reduction gear

Ribbon drive gear

Ribbon intermediate gear

Ribbon take-up gear

Ribbon take-up shaft

The rotation of the carriage transmission pulley driven via the carriage transmission belt is used to feed the ribbon.


Confidential
This ribbon feed mechanism only feeds the ribbon when the head carriage assembly is moved from the right side to the left side.
Figure D-38

Ribbon feed operation

When the carriage motor moves the head carriage assembly from the right side to the left side, the carriage transmission pulley rotates in the direction indicated by arrow A in Figure D-39. This driving force rotates the ribbon drive gear (planetary gear) in the direction indicated by arrow B via the transmission gear and ribbon reduction gear. At this time, the ribbon drive plate rotates in the direction indicated by arrow C around the ribbon reduction gear rotation shaft until the ribbon drive gear meshes with the ribbon intermediate gear.

Meshing of these gears transmits the driving force of the ribbon drive gear to the ribbon take-up gear via the ribbon intermediate gear, rotating the ribbon take-up shaft mounted at the top in the direction shown by arrow D. (See Figure D-39.)

The ribbon is fed when the ribbon feed roller in the ribbon cassette meshes with this ribbon take-up shaft.

On the other hand, when the head carriage assembly moves from left to right, the carriage transmission pulley rotates in the direction of arrow E, and the ribbon drive plate rotates in the direction of arrow F around the ribbon reduction gear rotation shaft. Consequently, the ribbon drive gear and ribbon intermediate gear no longer mesh, the ribbon take-up gear remains in place, and the ribbon is not fed.

Ribbon reduction gearTransmission gear



Ribbon take-up gear

Ribbon intermediate gearRibbon drive gear

Head carriage set


The ribbon take-up gear has an internal one-way clutch, preventing it from rotating in the direction indicated by arrow G and this, in turn, prevents ribbon slack. (See Figure D-39.)
Figure D-39

MICR Mechanism (Factory Option)

The MICR unit is comprised of the following parts (See Figure D-40.):

MICR head

MICR frame

MICR lever

MICR fixing

MICR solenoid

The MICR unit is located in the slip paper path.

B

F

C D G E

A

Transmission gear

Ribbon reduction gear



Ribbon take-up gearRibbon intermediate gearRibbon drive plate

Ribbon drive gear


Confidential
MICR character reading, and printing on front
When using the MICR process, the force of the drive of the paper feed motor switches to the slip paper feed gear using the J/S change mechanism. A check is inserted just like any other slip. When a check is inserted along the right edge of the slip guide lower frame in the direction indicated by the arrow in the figure below, it is fed up to the form stopper and positioned.

After the T.O.F. and B.O.F. detectors determine that a check has been inserted, the sub slip feed roller and sub slip hold roller take hold of the check in an operation like that described for positioning the slip paper. This prepares for movement of the form stopper in the direction indicated by the arrow to feed the check. The MICR solenoid is then energized, moving the MICR lever in the direction indicated by the arrow, and the MICR fixing mounted to the MICR lever pushes the check against the MICR head.

Next, the paper feed motor rotates at the MICR reading speed in the same way as for slip paper feed, transporting the check. When the MICR characters on the check pass over the MICR magnet in front of the MICR unit, they are magnetized. The check is transported farther, and when the characters pass through the MICR unit, they are read by the MICR head, shown in Figure D-41.

In the event the MICR characters cannot be recognized during the MICR reading process, the check is ejected out the rear (see Note 1).

Upon completion of MICR reading, the check is fed to the position corresponding to the format for printing on the front of the check, and the head carriage assembly prints in the prescribed format on the front of the check. After printing, the check is fed forward and ejected, completing the operation. The slip feed roller rotates during the front printing process, feeding the check forward in the same way as for a slip (see Note 2).

Figure D-40

T.O.F. detector

Sub slip paper hold roller

MICR assembly

Slip guide upper frame

B.O.F. detector

Slip guide lower frameMICR fixing

MICR magnet

Sub slip feed rollerMICR lever

Form stopper

Check paper



Note 1

Insert the check again if the MICR characters cannot be recognized the first time.

Note 2

When endorsement printing and printing on the front of the check are not performed, the check is fed forward and ejected upon completion of the MICR reading process.

Figure D-41

MICR lever

MICR head

MICR fixing

MICR lever

MICR solenoid


Confidential
Outline of Circuits
Connection of Units

This printer consists of the following main units:

Impact head

Impact mechanism drive unit

MICR head unit (factory option)

Main circuit board unit

Memory circuit board unit

Figure D-42

CN8

DKDDM

Memory circuit board(ROM, RAM)

I/F board

Power supply unit

Main circuit board assembly

Roll paper NE sensor

CN9 CN18

CN29 Switch

CN2

CN

22C

N5

CN

1C

N27

CN30CN28CN6

Control panel LEDs

Slip mechanism unit(paper feed, carriage, impact head)

CN

7

MICRhead

MICRsolenoid



Circuit Block Diagram

In the circuit block diagram below, the circuit units in this printer are divided into main units.

Figure D-43

The circuit boards consist of the following units:

Main circuit board

Memory circuit board (the memory circuit board is soldered to the main circuit board and cannot be removed)

Interface circuit board (option)

CN18Power supply unit

VCCPower supply

5VPower supply

G/A

Memory board

Slip transport/carriage motor solenoids drive voltage supply

Impact head ,MICR head voltage supply

24VBPower supply

24VCPower supply

I/F board DM

SLIP paper feed

SLIP carriage

Sensor

Solenoid

Impact head

LED/SWDKD

U17

U14

QM3QM6

SW

Q45

Mechanism unit

(U30)CPU(U3)

CN

30C

N28


Confidential
Memory Circuit Board
An outline of the memory board configuration and specifications is provided below.

Program ROM (flash memory, U508)

Font ROM (flash memory, U513)

Volatile RAM (SRAM, U509)

EEPROM for future expansion (electrically erasable NAND memory, U512)

Program Updates

Program downloads can be performed over communication lines (via the interface board).

Table D-2 Program ROM specifications

Item Specification

Application Mainly for storage of programs

Capacity Standard: 4 Mbit8 Mbits may be used, depending on specifications. Circuit also is compatible with 16 Mbits (reserved)

Access Speed 55 ns

Table D-3 Font ROM specifications

Item Specification

Application Mainly for storage of fonts

Capacity Standard: 4 Mbit8 Mbits may be used, depending on specifications. Circuit also is compatible with 16 Mbits (reserved)

Access Speed 55 ns

Table D-4 Volatile RAM specifications

Item Specification

Application Receive bufferPrint buffer

Capacity 1 MbitCircuit also is compatible with 2 Mbits (reserved), which can be used as external memory.

Access Speed 55 ns

Other SRAM is used.Flags and stacks use CPU internal RAM (256 bytes)

Table D-5 Specifications for the EEPROM for future expansion

Item Specification

Model TC5816BFT (Toshiba) etc.

Firmware Support Not determined



Memory Map

Figure D-44

Main Circuit Board Unit

The main circuit board consists of the following elements:

CPU peripheral circuit

• CPU

• GA (gate array)

• Reset circuit

Slip mechanism drive function

• Impact head drive circuit

• Platen open/close, MICR drive circuit (MICR is factory option)

• Paper feed motor drive function

000000H

0003FFH000400H

1FFFFFH

400000H

4000FFH

800000H

8FFFFFH

F00000H

FFFFFFH

CPU I/O

RAM (EXT)

RAM (INT)

000C00H000BFFH

Gate Array

Font ROM4M or 8M

Program ROM4M or 8M

CS1=0

CS0=0

CS3=0

CS2=0


Confidential
• Lever function drive circuit (for paper feed path changeover)
• MICR signal detection circuits (factory option)

• Detection circuits

Input circuit

• Logic power circuit

DIP switch read circuit

Control panel display drive circuit

Malfunction protective circuit

DM interface circuit



CPU and Peripheral Logic Circuits

CPU

CPU Terminals and Functions

Table D-6 CPU specifications

Item Specification

External Data Bus Width 16 bits

Internal Data Bus Width 32 bits

External Clock (root oscillation)

9.83 MHz

Bus Speed 19.66 MHz

Product Number TMP94C251F (Toshiba)

Internal RAM 256 bytes (used as stack area)

A/D Input Ports 7Four slip sensors (TOF detector, BOF detector, ejection detector, validation detector), and one each for MICR head reading, power source voltage monitoring, impact head thermistor voltage

D/A Output Port 1Carriage motor reference voltage

Table D-7 CPU terminals and functions

Port (Terminal) Pin Description Circuit Signal I/O I/O Definition

Name No. Name H L

DAREFH 1 VCC

DAREFL 2 GND

DAOUT0 3 For thermal PF, current setting THPF_DA OUT 5/256 0/256

DAOUT1 4 For impact CR, current setting CR_DA OUT 5/256 0/256

DVCC 5 VCC

PC0 6 Paper roll near end (common for HB/U175)

ROL_NE IN Paper detected

No paper

PC1 7 Paper end (roll paper) ROL_RE IN No paper Paper detected

PD0 8 Thermal PF_PHASE1 THPF_PH1 OUT

PD1 9 Thermal PF_PHASE2 THPF_PH2 OUT

PD2 10 Thermal PF_I01 THPF_I01 OUT




DVSS 14 GND

PE0 15 DSW2-5 DSW2-5 IN OFF ON


Confidential

PE1 16 EP_TP EP_TP IN E/P timing pulse interrupt

PE2 17 SW_SLIP_PF SW_SLIP IN None Depressed

PE4 18 SW_RECEIPT_PF SW_RPT IN None Depressed

PE5 19 Receive DMA request receipt DREQ IN

PE6 20 Interrupt for synchronous serial input

SD_INT IN

PF0/TXD0 21 Serial TXD for asynchronous communication

TXD OUT

PF1/RXD0 22 Serial RXD for asynchronous communication

RXD IN

PF2/CTS0/SCLK0

23 Serial CLKIN/DTR for asynchronous communication

CLKIN IN

PF4/TXD1 24 Serial CLKREQ for asynchronous communication

CLKREQ OUT

PF5/RXD1 25 Serial CTS for asynchronous communication

CTS IN

PF6/CTS1/SCLK1

26 Serial IF_DET for asynchronous communication

IF_DET IN

DVCC 27 VCC

NMI 28 VCC connection VCC IN

P86/WAIT 29 HCTS HCTS IN

AM0 30 CPU mode setting (fixed to "1")

CLK 31 Not used NC

TEST0 32 Not used (GND fixed)

TEST1 33 Not used (GND fixed)

CLVSS 34 VSS

CLVCC 36 VCC

DVSS 37 GND

X1 38 9.83 MHz

X2 39 9.83 MHz

AM1 40 CPU mode setting (fixed to "0")

RESET 41 Hard reset RESET

WDTOUT 42 Abnormal detect (used by GA) TIMI

DVCC 43 VCC

PB0/CAS1 44 LED_ERROR LED_ERROR OUT On Off

PB1/UCAS1 45 LED_SLIP LED_SLIP OUT On Off



Name No. Name H L



PB2/HLCAS1 46 LED_PAPER LED_PAPER OUT On Off

PB3/HUCAS1 47 SEN_PWR (sensor power On/Off)

SEN_PWR OUT Power off Power on

PB4/WE1 48 PTLED_COM PTLED_COM OUT Power on Power off

PA0/CAS0 49 MICR plunger (+) MICR_SOL1 OUT

PA1/UCAS0 50 MICR plunger (-) MICR_SOL2 OUT

PA2/OE0 51 SLIP plunger (+) SLIP_SOL1 OUT

PA3/OE1 52 SLIP plunger (-) SLIP_SOL2 OUT

PA4/WE0 53 EP-Power ON/OFF EP_ON OUT

DVSS 54 GND

P85/CS5 55 CS spare CS_RES OUT

P84/CS4 56 EJM (electronic journal flash) CS_EJ OUT Not selected EJM selected

P83/CS3 57 GA CS_CG OUT Not selected Font selected

P82/CS2 58 ROM1 (external program) CS_PGM OUT Not selected Program selected

P81/CS1/RAS0 59 RAM CS_RAM OUT Not selected External RAM selected

P80/CS0 60 ROM2 (FONT) CS_GA OUT Not selected GA selected

DVCC 61 VCC

P76/BUSAK 62 M190 motor drive signal 1 EP_MOTOR1 OUT Not driven Driven

P75/BUSRQ 63 M190 motor drive signal 2 EP_MOTOR2 OUT Brake

P74 64 Solenoid drive 1 LEVER1 OUT Open Driven

P73 65 Solenoid drive 2 LEVER2 OUT Open Driven

P72/WRLH 66 External memory write (D8 15) WRH OUT

P71/WRLL 67 External memory write (D0 7) WRL OUT

P70/RD 68 External memory read RD OUT

DVSS 69 GND

P00/D0 70 External data bus D0 1 0








DVCC 78 VCC



Name No. Name H L


Confidential









DVSS 87 GND

DVCC 88 VCC

DVSS 89 GND

P67/A23 90 External address bus A23 1 0








DVCC 98 VCC









DVSS 107 GND









Name No. Name H L





DVCC 116 VCC

PZ0 117 DSW1-1 DSW1-1 IN OFF ON






PZ6 123 EJ memory WP signal EJ_WP OUT

PZ7 124 Power source LED LED_POWER OUT ON OFF

PH4/INT0 125 For future expansion, currently pulled down

WAKE IN

PH0/TC0 126 DKD1 DKD1 OUT OFF ON

PH1/TC1 127 DKD2 DKD2 OUT OFF ON

PH2/TC2 128 Drawer sensor 1 DKDS1 IN Terminal 24V

Terminal GND

PH3/TC3 129 DSW1-7 DSW1-7 IN OFF ON

DVSS 130 GND

PG0/AN0 131 24 VDC monitor 24V_RD IN

PG1/AN1 132 Thermal head temperature (TH_THERM)

TH_THERM IN

PG2/AN2 133 Impact head temperature (IM_THERM)

IM_THERM IN

PG3/AN3 134 MICR data MIRD IN

PG4/AN4 135 TOF SLIP_TOF IN

PG5/AN5 136 BOF SLIP_BOF IN

PG6/AN6 137 Validation detector SLIP_VARI IN

PG7/AN7 138 Ejection detector SLIP_HAI IN

VREFH 139 VCC

VREFL 140 GND

ADVSS 141 GND

ADVCC 142 VCC

DAVSS 143 GND

DAVCC 144 VCC



Name No. Name H L


Confidential
Gate Array (GA)
The GA for this printer mainly consists of a custom IC with the following functions. The GA is operated by external root oscillation (10 MHz).

Impact head drive function

General-purpose port and other functions

Table D-8 GA terminals and functions

Terminal Name

Pin No. Description

Circuit Signal Name Spec.

Meaning of H

Meaning of L

DREQ 1 DMA request DREQ DREQ

CLKREQ 2 Synchronous serial CLK_REQUEST

CLKREQ CLKREQ

VDD1 3 Fixed power source VCC VCC

CLKIN 4 Synchronous serial CLKIN/DTR CLKIN CLKIN

TXD 5 Synchronous serial TXD TXD TXD

RXD 6 Synchronous serial RXD RXD RXD

SD_INT 7 Synchronous serial SD_INT SD_INT SD_INT

RTS 8 Synchronous serial RTS RTS RTS

PC7 9 Port PC/MSL1 MSL1 IN Yes No



PC4 12 Port PC/DSW2-1 DSW2-1 IN DSW-OFF DSW-ON



VSS1 15 Fixed power source GND

PC1 16 Port PC/lever timing detector LEVER_DT IN Light received

Light blocked

PC0 17 Port PC/HB-R cover TH_R_COVER IN

PG7 18 Port PG/F cover F_COVER IN Open Closed

PG6 19 Port PG/R cover/HB unit sensor R_COVER IN Open Closed

PG5 20 Port PG/AC reset detector AC_RESET IN Stopped Operating

PG4 21 Port PG/M190 reset detector EP_RES IN Detected

PG3 22 Port PG/DSW2-6 DSW2-6 IN

PG2 23 Port PG/CR motor step-out detector

CR_MOT_DT IN Light blocked

Light received

PG1 24 Port PG/CR motor HP detector CR_MOT_HP IN Light received

Light blocked

SW24V1 25 24V enabler 1 24VSW1 OUT 24V supplied

24V interrupted



SW24V2 26 24V enabler 2 24VSW2 OUT 24V supplied

24V interrupted

PB7/HEAD9 27 Impact/shuttle head 9 SHEAD9 OUT Blocked Driven

VDD2 28 Fixed power source VCC

PA7/HEAD8 29 Impact/shuttle head 1 SHEAD1 OUT Blocked Driven









PI4/HEADCOM1

38 Impact head common changeover

HEADCOM1 OUT Driven Blocked

PI3/TIMI 39 Timer in input TIMI IN


PI2/HEADCOM2

41 Shuttle head common changeover

HEADCOM2 OUT Driven Blocked

PE5 42 CR motor I10 CR_I10 OUT




PE1 46 CR motor PH1 CR_PH1 OUT

PE0 47 CR motor PH2 CR_PH2 OUT

PD7 48 Slip PF motor I10 PF_I10 OUT




PD3 52 Slip PF motor PH1 PF_PH1 OUT


PD2 54 Slip PF motor PH2 PF_PH2 OUT

PD1 55 Slip PF motor HOLD PF_HOLD OUT HOLD

PD0 56 DSW1-8 DSW1-8 IN DSW-OFF DSW-ON


PI1/ 58 Lever drive motor (brake not required)

LEV_M1 OUT Not driven

Driven


Terminal Name

Pin No. Description


Meaning of H

Meaning of L


Confidential

PI0/ 59 DSW2-4 DSW2-4 IN DSW-OFF DSW-ON

PE7 60 AC motor 1 AC_M1 OUT

PE6 61 AC motor 2 AC_M2 OUT


XOUT 63 Oscillator output 10.0 MHz

XIN 64 Oscillator input 10.0 MHz


RESET 66 RESET input RESET

PJ0 67 EJ-Memory ALE EJ_ALE

PJ1 68 EJ-Memory CLE EJ_CLE

PJ2 69 EJ-Memory R/B EJ_R/B

TEST 70 GA test pin GND

A7 71 Address-7 A7

A6 72 Address-6 A6

A5 73 Address-5 A5

A4 74 Address-4 A4

A3 75 Address-3 A3

A2 76 Address-2 A2

A1 77 Address-1 A1


A0 79 Address-0 A0

D7 80 Data-7 D7

D6 81 Data-6 D6

D5 82 Data-5 D5

D4 83 Data-4 D4

D3 84 Data-3 D3

D2 85 Data-2 D2

D1 86 Data-1 D1

D0 87 Data-0 D0

WR 88 Write WRL OUT

RD 89 Read RD IN


OUTH 91 OUTH OUTH OUT Always "H" after reset

NC2 92 VSS GND IN


Terminal Name

Pin No. Description


Meaning of H

Meaning of L



GACS 93 GA CS CS_GA IN Not selected

GA selected

PH5/STB1 94 Thermal head strobe-1 TH_STB1 OUT Not selected

Block 1 selected

PH4/STB2 95 Thermal head strobe-2 TH_STB2 OUT Not selected

Block 2 selected

PH3/DI1 96 Thermal head block-1 DATA TH_D1 OUT Printed Not printed

PH2/DI2 97 Thermal head block-2 DATA TH_D2 OUT Printed Not printed


PH1/SCLK 99 Thermal head SCLK H_SCLK OUT Data input at leading edge

PH0/LAT 100 Thermal head DATA latch TH_LAT OUT Retained Latched


Terminal Name

Pin No. Description


Meaning of H

Meaning of L


Confidential
Reset Circuit
Stable operation of the CPU and GA requires a certain reset period immediately after power up. All operations return to their initial status after the reset operation. The reset IC (U1) on this printer monitors the logic power source (VCC, Standard output: +5V), and sets the reset signal to LOW when the VCC is 4.2V or lower. The reset signal is restored from LOW to HIGH 50 ms after the VCC exceeds 4.2V. The CPU and GA operate normally after reset.

The main specifications of the reset IC are shown below:

Reset also can be performed by sending the reset signal from the host interface.

Table D-9 Reset IC specifications

Item Min. Typ. Max.

Detection Voltage (V) 4.0 4.2 4.5

Hysteresis Voltage (mV) 30 50 100

Delay Time (ms) 30 50 75

M/R Terminal "H" Voltage (V) 2.0 - -


The host interface reset signal (DSR signal and pin 25 input signal) is connected through DSW 2-7 and 2-8. When the reset signal (LOW) is applied here, the printer is reset. In the reset status, the CPU and GA are initialized, but the power remains on, and this status differs from when the power is turned on again. It is necessary to keep this in mind. The reset circuit is shown below.
Figure D-45

VCC

RESET

DSW2-7DSW2-8

U1

PST596

M/R1

SUB2

GND3

VOUT4

VCC5

C30.1uF

12

Q1

DTA114EK

23

1DA1

DAP202

13

2

R210K

12


Confidential
Slip Mechanism Drive Function
The main functions of the slip mechanism are described below:

Impact head drive

Carriage motor drive

Paper feed motor drive

Lever motor drive

Lever drive

MICR solenoid drive circuit

MICR signal detection circuit

Detection circuits

Impact Head Drive

The impact head drive unit consists of the head solenoid drive and common drive. The head drive circuit diagram is shown below.

Figure D-46

VCC

CR_DET

THERM(103HT)

E/P E

HEAD #3

HEAD #6

GND

THERM(10K)

E/P D

E/P F

HEAD #7

E/P COM

HP_DET

HEAD COM(3,5,7)

E/P COM

E/P BE/P C

HEAD #1

VCC

HEAD #2

HEAD COM(1,2,9)

HEAD #5

E/P A

HEAD COM(8,4,6)

HEAD #4

E/P HE/P G

E/P COM

NC

HEAD #9

HEAD #8

COMMON (24V)

SHEAD5

SHEAD2

CR_HP

HH7

EP_D

SHEAD4

SHEAD1

SHEAD3

HH1

SHEAD8

HH9

EP_EEP_F

EP_H

HH2

SHEAD9

HH4

EP_C

HH5

EP_G

SHEAD6 HH6

HH3

EP_A

HH8

EP_B

SHEAD7

D7

1

34

D101

2

34

5

6

QM73

5

2

1

4

QM53

5

2

1

4

CN28

11

22

33

44

55

66

77

88

99

1010

1111

1212

1313

1414

1515

1616

1717

1818

1919

2020

2121

2222

2323

2424

2525

2626

2727

2828

2929

3030

QM43

5

2

1

4

Q12

1

23

D111

2

34

5

6

R451 2

R56

1 2

R48

1 2

QM6

8

6

4

2

9

7

5

3

101

R471 2

D6

1

34

QM3

8

6

4

2

9

7

5

3

101

QM23

5

2

1

4

R631 2

R541 2

R65

1 2

R521 2

D91

2

34

5

6

Q13

23

1

R611 2


The SHEAD 1-9 signal lines (LOW active) are on the left side. These signals are directly driven by the GA (directly connected to GA [U30]). Signals SHEAD 1-9 are input to the head drive (QM3, 6, Q12: All NPN Darlington transistors) via the print driver (QM2, 4, 5, 7, Q13: All PNP transistors). The driver is an NPN Darlington transistor. The driver is internally clamped at Vce = 60V ±10V by an internal Zener. The driver performs logical calculation at hgf>1000, providing adequate flow for one solenoid. To utilize the regenerative current of the head solenoid effectively, the regenerative current when the GND COMMON is turned off by D6, D7 is channeled to the solenoid. With this printer, the head drive signal is controlled by the GA, and at the same time, the COMMON (24V power source voltage side) is chopped, enabling efficient head drive. The chopping circuit is shown below:
Figure D-47

The HEADCOM1 common drive signal driven by GA (U30) drives the Q7 MOSFET. Since it is necessary to drive Q7 at high speed (100 KHz or less), a speed-up circuit is added (Q47 periphery, pulls out electric gate load of Q7). The operating principle of the speed-up circuit is not described here. The relationship of the HEADCOM1 signal and SHEAD signals are shown below. The chopping cycle of the HEADCOM signal differs, depending on the voltage and temperature, but is virtually the same as the waveform in the diagram.

Figure D-48

24VB

HEADCOM1

R182

D6 D7

Q47

ZD1

D47

10KD48

R37

Q14

Q7

S H E A D 1 t o 9

H E A D C O M 1

Solenoid current


Confidential
Carriage Motor Drive Circuit
The carriage motor for this printer is a two-phase stepping motor. Constant-current drive is provided using 2-2 phase excitation as the drive method. Therefore, a dedicated constant-current drive chopping driver (U14, A2917SEB made by Alegrow) is used.

Figure D-49

Since the driver is of the constant-current type, the motor can be directly driven by setting the peak current. The peak current is set as described below, using the logical level of terminal I0 and I1.

At this time, VREF uses the DA output of the CPU (U3), and is set to an arbitrary value (0 - VCC) by firmware. RS is the resistance value (0.68 Ω) of R78 and R101. Accordingly, the current to the motor is calculated by the logic level of I0, I1 (judged by VREF1, 2 terminal voltage).

Table D-10 Logical level of terminal I0, I1 and output current

I0 I1 Output Current

L L VREF / (10 × Rs)

H L VREF / (15 × Rs)

L H VREF / (30 × Rs)

H H 0

24VC

VCC-PWR

M

CR_B-

CR_B-

CR_A+

CR_I11

CR_B+

CR_A-

CR_PH2

24VSW1

CR_I10

CR_PH1

CR_A+

CR_DA

CR_I21CR_I20

CR_A-

CR_B+

R97

R83

Q18

U14

OU

T1A

6E

15

SE

NS

E1

4O

UT

1B3

I10

2I1

11

VR

EF

144

PH

AS

E1

43E

NA

BLE

142

RC

141

LOG

IC S

PLY

40

OU

T2A

18E

219

SE

NS

E2

20O

UT

2B21

LOA

D S

PLY

22I2

023

I21

24V

RE

F2

25P

HA

SE

226

EN

AB

LE2

27R

C2

28

G29

G30

G31

G32

G33

G34

G35

G36

G37

G38

G39

G17

G16

G15

G14

G13

G12

G11

G10

G9

G8

G7

C45

R99

R78R81

C126

R100C47

D19

D18D14

C48

D15

C46R101

C36

C34


The drive signal to drive the phases is sent at the logical level of the PHASE1, 2 terminals. The motor driver cannot operate unless signal 24VSW1 in the circuit diagram is set to HIGH (controlled by the GA). When this signal is at a status other than HIGH, IC consumption is 0, and no electricity goes to the motor.
Slip Paper Feed Motor Drive Circuit

The slip paper feed motor is two-phase stepping motor. The driving method is 1-2 phase excitation during acceleration and deceleration, and constant-current drive is performed with 2-2 phase excitation. Therefore, a dedicated constant-current drive chopping driver (U17, A2917SEB made by Alegrow) is used.

Figure D-50

The circuit configuration is the same as the carriage motor driver, but the current setting is fixed, and is changed between two levels by the output (PF_HOLD) of the GA (U30) port. The current calculation procedure is described below.

Current = VREF/(10 Rs)

RS: 1Ω

VREF: VCC or voltage obtained by voltage division ratio of R105 and R106.

As for the carriage motor drive circuit, the driver IC is operated by setting the 24VSW1 signal HIGH.

VCC-PWR

24VCVCC

24VC

M

SLIP-PF

PF_I21PF_A+

PF_A-

PF_B+

PF_B-

PF_I11

PF_PH2

PF_PH1

PF_HOLD

24VSW1

R10211W1%

12

R117

1K

1 2

C54

47uF6.3V

PN

R10375K

12

U17A2917SEB

OU

T1A

6E

15

SE

NS

E1

4O

UT1

B3

I10

2I1

11

VR

EF

14

4P

HA

SE

14

3E

NA

BL

E1

42

RC

14

1L

OG

IC S

PL

Y4

0

OU

T2A

18

E2

19

SE

NS

E2

20

OU

T2B

21

LO

AD

SP

LY

22

I20

23

I21

24

VR

EF

22

5P

HA

SE

22

6E

NA

BL

E2

27

RC

22

8

G29

G30

G31

G32

G33

G34

G35

G36

G37

G38

G39

G17

G16

G15

G14

G13

G12

G11

G10

G9

G8

G7

C573300pF

12

D29EC10QS061

2

R104

1K

1 2

R11875K

12

C493300pF1

2

D26EC10QS06

12

D30EC10QS061

2

R11911W1%

12

R1133.3K 1

2

C55470pF

12

D27EC10QS06

12

C560.1uF

12

C50470pF

12

R10568K1%

12

R106

30K1%

12

+

-U16BNJM2904M

5

67

Q30

DTC114EK

23

1C530.1uF

12

+

- U16ANJM2904M

3

21

84

Q18

DTC114EK

23

1


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Lever Motor Drive Circuit
This printer has a DC type lever motor for the purpose described below.

Adjustment of paper path changeover timing

Adjustment of shaft rotation position

Rotation of the lever motor starts changeover of the paper path and the platen open/close operation. An NPN Darlington transistor is used for lever motor drive. Due to the structure of the lever motor, a brake circuit is not required. The lever motor is driven using the ELV_M1 output signal from the GA.

The lever motor rotates when LEV_M1 = LOW. The motor cannot be driven when the VCC-PWR is not being supplied. Furthermore, the Q41 NPN Darlington transistor incorporates a CE Zener to perform kickback protection.

Figure D-51

VCC-PWR

24VC

LEV_MOT2

LEV_M1

LEV_MOT1

D57 R116

D32

Q39Q41

CN30

123456789101112131415161718192021222324252627282930



Lever Drive Circuit

This printer has two levers to drive the mechanism. The lever motor rotation enables lever A and lever B to function. This controls the mechanism.

Lever A and lever B are solenoids driven by 24V. Simple drive of lever A and lever B is performed by an NPN Darlington transistor. LEVER1 and LEVER2 are output signals from the CPU.

• Lever A: Driven by a LOW level of the LEVER1 signal

• Lever B: Driven by a LOW level of the LEVER2 signal

Figure D-52

VCC

24VC

LEVERLEVER1

LEVER2LEVER-ALEVER-B

CN30

123456789101112131415161718192021222324252627282930

Q43

Q54

R175

D17

R174D44

Q42 Q53

D21


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MICR Solenoid Drive Circuit (Factory Option)
This printer can have an optional MICR mechanism. MICR reading is performed when a check is inserted. The MICR solenoid is a locking solenoid that uses a permanent magnet, and performs the following operations:

• During Operation: Driven by 24V, held by permanent magnet

• Reset Status: 13V applied in opposite direction of operation, releasing hold status

Figure D-53

To control the MICR solenoid, it is necessary to apply two voltage levels (24V, 13V) in opposite directions. Therefore, the MICR solenoid has a complicated circuit configuration. The MICR solenoid is driven by MICR_SOL1 and MICR_SOL2 (output signals from the CPU). MICR_SOL1 determines the direction in which electricity is sent, and MICR_SOL2 drives the MICR solenoid. The logic is described in the following table.

Table D-11 MICR_SOL1, 2, and MICR

MICR_SOL1 MICR_SOL2 MICR Solenoid Status

H L Drives MICR solenoid. Pulled to magnet side in this status.

L L Drives MICR solenoid. Status where it attempts to reset.

H H Not driven, regardless of MICR_SOL1 logic.

L H

24VC

VCC

13V

MICR_SOL2

M_SOL1M_SOL2

MICR_SOL1

R213

Q31

Q32

R214

C51

R233 R112

D55

CN27

12

R232

QM8

R110

D63

U29

Q36

D28

D25

Q28

C52

R111

Q57

Q33

D56

U15

G

IO

R107

D31

D62

Q37

D54


The MICR solenoid is not driven when MICR_SOL2 is HIGH. MICR_SOL1 is the solenoid drive signal. This is to prevent a short when the transistors go on at the same time.
The MICR solenoid drive circuit is shown below.

Figure D-54

MICR reader operating principles

MICR stands for “magnetic ink character recognition.” Unlike conventional printing ink, magnetic ink includes iron powder or some other magnetic element, which gives the ink itself magnetic properties.

Application of a magnetic field on one side of characters printed in magnetic ink on a check causes the characters to be magnetized, as shown in the illustration below.

Figure D-55

24V 13V

MICR_SOL1

MICR_SOL2

QM8(7)NPN

QM8(9)NPN

Q28PNP

Q32

PNP

INV

3 4

INV

34

INV

3 4 1 2 12

SS

S

S

S

SS

N

N

N

NNN

SS

SSSSSS

SSSSSS

SSSS

NN

NN

NN

NN

NN

N

NN

NNN

Check paper movement


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The magnetic reader head recognizes the magnetized characters as shown below.
The voltage waveform output from the magnetic reader head is different for each character, making it possible to recognize each individual character.

Detection Circuits

This printer has detection circuits for paper and various mechanisms. The detection functions are described in the table below.

Figure D-56

Figure D-57

Table D-12 Detection circuits

Detector FunctionType of Sensor Circuit

TOF Slip detection Transparent photo

Voltage drop of load resistor (R69) is read by the AD port of the CPU

BOF Slip detection Transparent photo


Paper ejection

Slip detection Reflective photo


Validation Slip detection Reflective photo


Paper Insertion

Paper roll detection

Reflective photo

Logical judgment of voltage drop of load resistor (R147)

Near Paper End

Paper roll detection

Microswitch Logical judgment of switch status by the CPU port.

Voltage Power source voltage

Voltage potential divider

Potential divider ratio of 24V power source voltage 1/7.2 (R71, R76) is read by the AD port of the CPU

I

V

S S N N S SN N

0 1



Impact Head Temperature

Head temperature

Thermistor VCC potential voltage ratio of thermistor resistance value and R72 is read by the AD port of the CPU

Thermal Head Temperature

Head temperature

Thermistor VCC potential voltage ratio of thermistor resistance value and R126 is read by the AD port of the CPU

Carriage Motor Step-Out

Mechanism Transparent photo

Base of Q50 is driven by voltage drop of load resistor (R90); phase data with no delay is taken out; and logical judgment is performed by the GA port

Home Position

Mechanism Photo IC Logical judgment of photo IC output is performed by the GA port

Lever Timing Detector

Mechanism Photo IC Logical judgment of photo IC output is performed by the GA port

Front Cover Case Transparent photo

Logical judgment of load resistor (R88) voltage drop is performed by GA port

Rear Cover Case Transparent photo

This signal is used for thermal unit sensor

Rear Cover TM-H6000

Case Photo IC Logical judgment of photo IC output is performed by the GA port

EP Timing Pulse

EP unit Tacho-gene Waveform shaping (Q19) of sine wave output, and processing by the CPU interrupt port with hysteresis (U28)

EP Reset EP unit Read switch Logical judgment of the GA port with time constant

DIPSW DIPSW Pull-up by resistor group (RM1, 2, 3, 4). "L" is read at On. Logical judgment is performed by the CPU, GA

Table D-12 Detection circuits

Detector FunctionType of Sensor Circuit


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Input Circuits
Logic Power Source Circuit

The logic power source circuit generates the power for this printer. The CPU, GA, and most other circuits do not operate if voltage is not output by the logic power source circuit. The power source circuit has an input of 24V, and uses a dedicated DC/DC converter IC (U11: PQ1CZ1) to output 5V ± 4%.

Figure D-58

The output voltage is determined by the potential division of R82 and R85. In other words, the circuit operates so that the crossover voltage of R82 and R85 is 1.26 V.

The input voltage of 24V for the power supply circuit is supplied to U11 through the R2 fuse resistor (KOA RF73B2HTE0.51). R3 may burn out in the event of a malfunction in the U11 area. R3 will also burn out in the event of excessive VCC voltage (approx. 7.5 V or more). This fuse resistor cannot be replaced. Therefore, the circuit cannot be repaired by replacing the R3 in the event it has burned out due to a circuit malfunction.

Table D-13 Power source specifications

Item Min. Typ. Max. Remarks

Output Voltage (V) 4.85 5.04 5.24

Output Current (A) - - 1.0

Input Voltage (V) 21.6 24 26.4

Over-Current Protection (A)

1.55 2 2.6 L2, D13, C35 not provided. The peak current is detected, and detected voltage is lowered. Automatic reset.

Over-Voltage Protection (V)

7.5 CY1 goes On after detection, and R3 burns out. Does not reset.

VCC

AVCC

24VB

R253

C35C38

R3

U11

PQ1CZ1

VIN1

VOUT2

COM3

ADJ4

ON/OFF5

G6

L2

D13

C37

CY1

ZD3L1

R82

C155

R85



Rush Current Control Circuit

The rush current control circuit controls rush current when the power source is turned on. This printer has large-capacity condensers to facilitate stable operation of mechanism drivers and circuits. Therefore, an excess of rush current is generated when the power is turned on. This circuit controls the rush current.

The CN18 external power source is connected to the CN19 switch. Q61 is Off when the switch is turned On. Accordingly, the current that flows when the switch is turned on is supplied to the respective parts via the power thermistor (TH1). The power thermistor controls the input current with an in-line resistor (room temperature: 2.2 Ω). When the printer circuit begins to operate, GA (U30) output OUTH is HIGH, and Q61 goes On. This bypasses TH1.

The OUTH signal is connected to the RESET signal internally by the GA, causing TH1 to be bypassed when RESET is HIGH.

The power thermistor (TH1) has high resistance at room temperature, but the resistance value decreases with heat generated by current flow. The power thermistor immediately begins to heat up when 24V is turned on, but cools down when it is bypassed at the time the circuit begins to operate, regaining its high resistance. Accordingly, it controls the rush current when the power source is turned on again.

Figure D-59

24VB

OUTH

SIN2-1

PIN1MIN1

CN18

123

SH

F1

C41

CN29

12

Q62

Q61

TH1

D70

R244

R245

C44C43C42

D16C40

L3


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Switch Circuit
The 24V supplied from the external power source is supplied to the required locations in this circuit. The supply power source and application are described below. The 5V system is controlled by the same switch. The circuit is configured with a MOSFET semiconductor switch. Q44 is a 2-element MOSFET that turns the VCC_PRW and VCC_SEN on and off.

Figure D-60

Table D-14 Switch circuit

Type (circuit network name)

Switch(On/Off) Control Application

24VB OUTH GA (U30) Impact head drive power source, MICR read circuit power source. Supplied via TH1 when other than OUTH = HIGH status. Can only be turned off with power switch.

24VC 24VSW1Turned on and off by Q45

GA (U30) Slip mechanism power source.

24V(DM) None None DM power source, DK power source.

VCC None None Started after power switch is turned on.

VCC-PWR 24VSW1Turned on and off by Q44

GA (U30) 5V used by slip mechanism.

VCC_SEN SEN_PWRTurned on and off by Q44

CPU (U3) Power source for slip system paper detection sensor.

24V(DM)

24VB

24VC

24VA

VCC

VCC-PWR2

VCC

VCC-PWR

SIN2-1

SIN2-1

MIN1

24VSW1

FG

PIN1

24VSW2

24VSW1

VCC_SEN

SEN_PWR

CN18

123

SH

F1

C41

CN29

12

Q24

Q61

TH1

Q46

Q45

R96

R244

R176

C44C43C42

D16

Q59

D1D2G S

D3D4

Q17R243

F2

F3

R177D45

C40

L3

R94

D22

Q60

Q44

S1G1S2G2 D2

D2AD1A

D1

Q51

R207

R208



Control Panel Functions

This printer has four LEDs and two input switches.

Display Functions

The LED displays are shown below. The CPU (U3) controls them.

The circuit configuration is shown below. All lamps turn on when the signal outputs the HIGH status.

Figure D-61

Types of Switches

The printer has two switches. As shown by the circuit for the display functions in the previous section, input is enabled by two signals (SW_SLIP, SW_RPT). LOW status is input when the panel switch is pressed. HIGH is input when the switch is not pressed.

Table D-15 Types of displays

Circuit Signal Color Application

LED_POWER Green Lights during normal operation

LED_ERROR Red Indicates printer error

LED_PAPER Red Indicates printer paper status

LED_SLIP Green Indicates slip selection

VCC

VCC

LED_PAPER

LED_SLIP

LED_ERROR

LED_POWER

SW_RPT

SW_SLIP

C13C14

CN6

12345678

Q3

Q4

Q6

R178

R30 R31

R28

R179

R181

R29R180

Q58


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Malfunction Protective Circuit
This printer has the following three malfunction protection functions:

GA operation monitor

The CPU (U3) monitors GA clock oscillation. The CPU firmware reads a specific GA register at an arbitrary time, and compares that value with the value previously read. If the results of the comparison are different, the system is judged to be operating normally. The GA changes the register value using clock oscillation. Therefore, if it is operating normally, the register value continuously changes.

CPU operation monitor

CPU runaway causes a WDT (watch dog timer) overflow, resulting in output of LOW status from the CPU WDT output terminal. This is connected to the GA TIMI input terminal, and when the GA detects the LOW status for a certain time, it goes to the reset status and is not restored.

Mechanism malfunction monitor

When the thermal head becomes abnormally hot, the GA TIMI input terminal goes LOW, and the GA is reset and is not restored. The firmware judges this as a GA malfunction, and processes it as an unrecoverable error.

GA TIMI input terminal also goes LOW when the impact head becomes abnormally hot, causing the GA to go to the reset status, which will not be restored. The firmware judges this as a GA malfunction, and processes it as an unrecoverable error.



Interfaces

This printer has a variety of interfaces. There is a dedicated connector (CNB) for the EPSON customer display. A general-purpose drawer can be connected to CN9 and used. The optional interface board allows communication with more interfaces.

Interface Boards

This printer can accommodate an exchangeable interface board. The following types of interface boards can be installed. As new interfaces are developed, they may become available for this printer.

UB-S01 (RS-232C interface)

UB-S02 (RS-485 interface)

UB-P02 (IEEE-1284 interface)

DM

The EPSON DM series customer display can be connected to CN8. However, the DM can only operate with CN8 when the UB-S01 serial interface is used.

The UB-U01 interface board has a dedicated DM connector that can be used.

DKD

A general-purpose drawer can be used.


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Important Parts
Fuses

Table D-16 Fuses

Fuse Function Standard

Fuse F1 Main fuse, provided for safety purposes. Fuse may burn out when input circuit is unsafe.Make sure to use the same type of fuse when it is replaced. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.

R452003 Littelfuse Inc.

Fuse F2 Used to protect against unsafe circuit elements. It will burn out in the event of a circuit board problem. The problem cannot be corrected by replacing the fuse.It may burn out due to an unsafe 24VC line. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.

R451002 Littelfuse Inc.

Fuse F3 Fuse provided for safety standard compliance. Does not relate to operation. Will burn out for short of power line after DM connection.

SSFR-S2.0A-F002 SOC CO Ltd

Fuse F4 Used to protect against unsafe circuit elements. It will burn out in the event of a circuit board problem. The problem cannot be corrected by replacing the fuse.Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.

ICP-S1.0 ROHM ELECTRONICS

Fuse R3 Used as safety protection for the logic power source circuit. It may burn out due to a logic power circuit problem or excessive VCC voltage. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.

RF73B2HTD0.51OHMJ KOA Corp.



DIP Switch Settings

Serial Interface Specifications

DIP Switch 1

bps: bits per second

Table D-17 DIP switch 1 settings

Switch No. Function ON OFF

1 Data receive error Ignored "?" printed

2 Receive buffer capacity 45 bytes 4KB

3 Handshake XON/XOFF DTR/DSR

4 Bit length 7 bits 8 bits

5 Parity check Yes No

6 Parity selection Even Odd

7 Baud rate selection See table below

8

Table D-18 Baud rate selection

Transfer Rate Switch No.

[bps] 7 8

2400 ON ON

4800 OFF ON

9600 ON OFF

19200 OFF OFF


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DIP Switch 2


1 Handshake operation (BUSY condition) Receive buffer full Offline or receive buffer full

2 Customer display (DM-D) connection Connected Not connected

3 Printing line count selection Multi Standard

4 TM-U375 print width compatibility mode Compatible Not compatible

5 Used internally - Fixed to OFF


7 Pin 6 reset signal Enabled Disabled

8 Pin 25 reset signal Enabled Disabled

Table D-20 TM-U375 print width compatibility mode settings

SW2-4 SW2-3 Font/Character Dot Spacing Printing Line Count Total No. of Dots

ON OFF 5 x 9/1 half dot 33 lines 400 half dots

7 x 9/3 half dots 40 lines

ON 5 x 9/1 half dots 35 lines 385 half dots




Parallel Interface Specifications

DIP Switch 1

DIP Switch 2



1 Auto carriage return Enabled Disabled

2 Reception buffer capacity 45 bytes 4KB

3 Reserved - Fixed to OFF








1 Handshake operation (BUSY condition) Receive buffer full Offline or receive buffer full

2 Not used (DM-D connection) - Fixed to OFF

3 Printing line count selection Multi Standard

4 TM-U375 print width compatibility mode Compatible Not compatible



7 Reserved (dedicated serial I/F) - Fixed to OFF

8 #31 pin reset signal Fixed to ON -

Table D-23 TM-U375 print width compatibility mode settings

SW2-4 SW2-3 Font/Character Dot Spacing Printing Line Count Total No. of Dots

ON OFF 5 x 9/1 dot 33 lines 400 half dots


ON 5 x 9/1 half dots 35 lines 385 half dots



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Outline of Specifications
Features

This product was designed as a high-performance POS printer where one unit can handle printing slips, validations, and journals (journals and receipts using pressure-sensitive paper) and to be highly reliable, durable, and long-lasting. The main features are listed below.

• Minimum line logic-seeking controls for high-speed printing.

• When combined with MICR (factory option), MICR reading + check table printing (single-pass high-speed processing) are possible.

• Quiet printing (impact-type industry's top-class quiet printing).

• Sheets can be inserted in two ways: when using validation paper, use the drop-in method by inserting from the top; when using slip paper, insert from the front.

• A mechanical form stopper stabilizes slip sheet insertion.

• Page mode allows printing of any font.

• Many types of check printing are possible.

• Has highly operable roll paper, easy loading of roll paper, and one-touch T/U paper take-up.

• Using the packaged attachment provides the use of two types of paper width.

• Two system drawer drive is available.

• Commands allow you to select character sizes (7 x 9 fonts and 5 x 9 fonts).

• Commands conform to ESC/POS.®

• Printer status is automatically transmitted using the installed ASB (automatic status back) function.

• Supports many I/F specifications (RS-232/bidirectional parallel).



Printer Unit

Printing Specifications

Printing method Serial impact dot matrix

Head wire arrangement 9 x 1 row, wire pitch of 0.353 mm 1/72 inch

Printing direction Bidirectional printing at shortest distance

Print speed Approx. 5.14 lps (for 40 columns, 17.8 cpi, printing on roll paper)

[lps: lines per second][cpi: characters per 25.4 mm (characters per inch) ]

Paper SpecificationsInch values are approximate.

Roll paper

Paper type Plain paper, pressure-sensitive paper

Paper dimensions Paper width 82.5 mm ± 0.5 mm or 76 mm ± 0.5 mm 3.25 ± 0.02” or 2.99 ± 0.02”

External diameter Max. φ60 mm 2.36” for 1 ply paper and journal paper onlyMax. φ89 mm 3.5” for receipt paper only Max. φ83 mm 3.27” for 2-ply paper and 3-ply paper only (However, always take up the last sheet.)

Core Min. 10 mm 0.39” for inner diameter

Single-sheet paper: slip/validation paper

Paper type Regular paper, pressure-sensitive, carbonless copy paper

Paper dimensions Slip 70148 mm (width) × 150210 mm (length) 0.39 - 5.83” (width) × 5.91 - 8.27” (length)

Validation 148150 mm (width) × 70210 mm (length) 5.83 - 5.91” (width) × 0.39 - 8.27” (length)

Table D-24 Paper thickness

Type Paper Thickness

Regular Paper 0.06 mm0.085 mm

Multi-ply paper Per sheet 0.05 mm0.08 mm

Total thickness Max. 0.2 mm

Number of pieces Max. 3 pieces (1 original + 2 copies)


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1 sheet (no copies)
• Paper thickness

Pressure-sensitive paper (with pressure-sensitive paper, use a maximum of 4 sheets including roll paper).

The following table shows the copying capacity. Ambient temperature influences copying capacity, so use this printer within the guaranteed temperatures in the table.

Ribbon Cassette

Use the following dedicated ribbon cassette.

MICR Reader (Factory Option)

Reading Method

Permanent magnet recognition

Recognition Ratio

98% or more (at 25°C 77°F)

• Standard evaluation checks made by EPSON were used for testing purposes.

• Checks should be free of curls, bends, wrinkles, etc.

Table D-25 Thickness of transfer paper

Type Paper Thickness

Base paper 0.07 mm0.12 mm

Copy paper and original paper

0.04 mm0.07 mm

Thermal transfer carbon Paper

Approximately 0.035 mm

Total thickness 0.09 mm0.31 mm (includes paper thickness of roll paper.)

Table D-26 Copying capacity

Copy Page Count Guaranteed Temperatures

Original + 2 Copies 10°C40°C 50°F - 104°F

Original + 1 Copies 5°C45°C 41°F - 113°F

Table D-27 Dedicated ribbon cassette

Type Color Ribbon Life

ERC-32 (P) Purple 6 million characters (25°C 77°F, continuous printing)

ERC-32 (B) Black 4 million characters (25°C 77°F, continuous printing)



Overall Specifications

Internal Buffer


Electrical Specifications

Operating voltage +24 VDC ± 10% Current consumption (at 24V, excluding drawer kick drive)

Environmental Specifications

Temperature Operating: 5 45°C 41 - 113°FStorage: -10 50°C 14 - 122°F (excluding paper, ribbon)

Humidity Operating: 10 90% RH (without condensation)Storage: 10 90% RH (without condensation)

(excluding paper, ribbon)

Table D-28 Internal buffer capacity

Buffer Capacity

Receive buffer 45 bytes or 4KB, selected by DIP switch

Communication baud rate 2400, 4800, 9600, 19200 bps

NV bit image storage area 384KB

User NV memory 1KB

Table D-29 Current consumption

Mode Current Consumption

Operation Average: Approx. 1.8 A

Peak: Approx. 5.5 A

Standby Average: Approx. 0.2 A


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Interface Features
RS-232C Serial Interface

Refer to DIP switches for data bit length, baud rate, and parity settings.

Bidirectional Parallel Interface (IEEE-1284)

The interface is Centronics compatible and meets the specifications for IEEE-1284 bidirectional communications.

Table D-30 RS-232C serial interface specifications

Item Specifications

Data transfer method Serial

Synchronization Asynchronous

Handshake DTR/DSR or XON/XOFF control

Signal level MARK: - 3V - 15 V, Logic "1"SPACE: + 3V + 15 V, Logic "0"

Stop bit 1 bit fixed

Printer connector D-SUB25 (female) connector

Table D-31 Bidirectional parallel interface specifications

Item Specifications

Data transfer method 8 bit parallel

Synchronization By externally supplied Strobe signal

Handshake By Ack signal and Busy signal

Signal Level All signals are TTL compatible

Connector ADS-B36BLFDR176 (Honda Tsushin Kogyo) or equivalent (IEEE1284 Type B)



RS-485 Serial Interface


Handshake, bit length, baud rate, and parity are set by the DIP switches.

The data stop bit is fixed at 1 bit.

Table D-32 RS-485 serial interface specifications

Item Specifications

Data transfer method Serial

Synchronization Asynchronous

Handshake DTR/DSR or XON/XOFF control

Signal level 2.5V 5 V: Logic "1" 0.0V 0.8 V: Logic "0"

Baud rate 2400, 4800, 9600, 19200 bps

Parity None, even, odd

Stop bit 1 bit or more

Connector D-SUB25 (female)


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Appendix EParts List
Alphanumeric List

name for service manual name for price list q’ty page ref.#

76 mm kit 76MM KIT 1 F-1 161

Assist paper guide PAPER GUIDE,ASSIST 1 F-7 664

Assist paper guide spacer SPACER,ASSIST PAPER GUIDE 1 F-1 163

Assist paper guide spring SPRING,ASSIST PAPER GUIDE 1 F-7 653

Back case CASE,BACK,AA 1 F-1 129

Backup paper guide cap CAP,BACK-UP PAPER GUIDE 1 F-7 678

Belt drive cap CAP,BELT DRIVE 2 F-6 603

Belt plate PLATE,BELT 1 F-2,3 684

Belt tension spring SPRING,BELT TENSION 1 F-6 630

Carriage assembly CARRIAGE ASSEMBLY 1 F-6 709

Carriage belt BELT,CARRIAGE 1 F-6 629

Carriage cover frame assembly FRAME,CARRIAGE COVER ASSEMBLY 1 F-2,3 713

Carriage drive pulley PULLEY,CARRIAGE DRIVE 1 F-6 633

Carriage drive transmission gear GEAR,CARRIAGE DRIVE TRANSMISSION 1 F-6 634

Carriage guide shaft SHAFT,CARRIAGE GUIDE 1 F-6 631

Carriage motor MOTOR,CARRIAGE 1 F-6 733

Carriage spring SPRING,CARRIAGE 1 F-6 611

Carriage transmission pulley PULLEY,CARRIAGE TRANSMISSION 1 F-6 632

Caution seal SEAL,CAUTION 1 F-1 122

Circuit board FFC FFC,CIRCUIT BOARD 2 F-1 206

Clamp CLAMP 1 F-1 110

Connector plate (type BA) PLATE,CONNECTOR,BA 1 F-1 123

Control panel cable CABLE,SWITCH PANEL 1 F-1 207

Control panel circuit board assembly SWITCH PANEL CIRCUIT BOARD ASSEMBLY 1 F-1 204

Control panel label LABEL,SWITCH PANEL,AA 1 F-1 157

Control panel unit SWITCH PANEL UNIT,AA 1 F-1 134

Cover ground plate PLATE,COVER GROUND 1 F-7 676

Crank shaft holder CRANK SHAFT HOLDER 6 F-4,5,7 730

C-ring (5103-21) C-RING,5103-21 2 F-7 772

Drive lever coil cover COVER,DRIVE LEVER COIL 1 F-4,5 671

Endorsement platen shutter SHUTTER,ENDORSEMENT PLATEN 1 F-4,5 680

Rev. B Parts List Appendix E-1

Confidential

E-ring (1.2) RETAINING RING TYPE-E(1.2) F/UC - F-8 778

E-ring (1.5) RETAINING RING TYPE-E(1.5) - F-4,5,7 719

E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-1 105

E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-6,7 720

E-ring (2.3) RETAINING RING TYPE-E (2.3) F/UC - F-2,3,4,5,7 724

E-ring (3) RETAINING RING TYPE-E(3)F/UC - F-2,3,4,5,7 721


E-ring (5) RETAINING RING TYPE-E(5) F/UC - F-4,5,6 723

Form stopper FORM STOPPER 1 F-4,5 618

Form stopper shaft SHAFT,FORM STOPPER 1 F-4,5 619

Form stopper spring SPRING,FORM STOPPER 1 F-4,5 620

Front case CASE,FRONT,AA 1 F-1 130

Front cover detector assembly FRONT COVER DETECTOR ASSEMBLY 1 F-2,3 691

Front frame FRAME,FRONT 1 F-4,5 613

Front reinforcement frame FRAME,FRONT REINFORCE 1 F-4,5 612

Front seal SEAL,FRONT,AA 1 F-1 148

Front sound absorption material SOUND ABSORPTION MATERIAL,FRONT 2 F-1 144

Gear train cover COVER,GEAR TRAIN 1 F-6 768

Guide roller shaft SHAFT,GUIDE ROLLER 1 F-7 641

H.P. detector assembly H.P.DETECTOR ASSEMBLY 1 F-6 707

Head caution seal SEAL,CAUTION,HEAD B 1 F-1 162

Head seal SEAL,HEAD 1 F-6 795

Hexagon lock screw (millimeter type) HEXAGON LOCK SCREW 2 F-1 155

Hexagon nut H.N.-1,3,F/ZN 1 F-1 120

Holder plate (type A) PLATE,HOLDER,A 1 F-1 141

Holder plate (type B) PLATE,HOLDER,B 1 F-1 160

Holder spring SPRING,HOLDER,A 1 F-1 142

IC cover IC COVER 1 F-1 111

Intermediate cable (type A) CABLE,INTERMEDIATE,A 1 F-6 734

Intermediate cable (type B) CABLE,INTERMEDIATE,B 1 F-6 735

Intermediate cable (type C) CABLE,INTERMEDIATE,C 1 F-6 736

Intermediate cable tube TUBE,CABLE INTERMEDIATE 1 F-6 771

Intermediate circuit board assembly INTERMEDIATE CIRCUIT BOARD ASSEMBLY 1 F-6 708

Intermediate circuit board cover COVER,INTERMEDIATE CIRCUIT BOARD 1 F-6 769

J/S change gear J/S CHANGE GEAR 1 F-2,3 728

J/S change lever LEVER,J/S CHANGE 1 F-2,3 650


Appendix E-2 Parts List Rev. B


J/S change solenoid J/S CHANG SOLENOID 1 F-2,3 727

J/S change spring SPRING,J/S CHANGE 1 F-2,3 651

J/S solenoid mounting plate MOUNTING PLATE,J/S SOLENOID 1 F-2,3 774

Lead wire (type A) LEAD WIRE,A 1 F-4,5 740

Lead wire (type B) LEAD WIRE,B 1 F-4,5 741

Lead wire (type C) LEAD WIRE,C 1 F-4,5 742

Lead wire (type D) LEAD WIRE,D 1 F-4,5 743

Lead wire (type E) LEAD WIRE,E 1 F-4,5 744

Lead wire (type F) LEAD WIRE,F 1 F-4,5 745

Lead wire (type G) LEAD WIRE,G 1 F-4,5 746

Lead wire (type H) LEAD WIRE,H 1 F-4,5 747

Lead wire (type I) LEAD WIRE,I 1 F-4,5 748

Lead wire (type J) LEAD WIRE,J 1 F-4,5 749

Lead wire (type K) LEAD WIRE,K 1 F-4,5 750

Lead wire (type L) LEAD WIRE,L 1 F-6 751

Lead wire (type M) LEAD WIRE,M 1 F-6 752

Lead wire (type N) LEAD WIRE,N 1 F-6 753

Lead wire (type O) LEAD WIRE,O 1 F-7 754

Lead wire (type P) LEAD WIRE,P 1 F-7 755

Lead wire (type Q) LEAD WIRE,Q 1 F-7 756

Lead wire (type R) LEAD WIRE,R 1 F-4,5 757

Lead wire (type S) LEAD WIRE,S 1 F-4,5 758

Lead wire (type T) LEAD WIRE,T 1 F-4,5 759

Lead wire (type U) LEAD WIRE,U 1 F-2,3 760

Lead wire (type V) LEAD WIRE,V 1 F-2,3 761

Lead wire (type W) LEAD WIRE,W 1 F-2,3 762

Lead wire (type X) LEAD WIRE,X 1 F-2,3 763

Lead wire (type Y) LEAD WIRE,Y 1 F-2,3 764

Lead wire (type Z) LEAD WIRE,Z 1 F-2,3 765

Left platen lever shaft SHAFT,PLATEN LEVER,L 1 F-7 626

Lever coil mounting plate sub assembly MOUNTING PLATE,LEVER COIL SUB ASSEMBLY

1 F-4,5 695

Lever drive coil (type A) COIL,LEVER DRIVE,A 1 F-4,5 621

Lever drive coil (type B) COIL,LEVER DRIVE,B 1 F-4,5 622

Lever drive motor assembly MOTOR,LEVER DRIVE ASSEMBLY 1 F-4,5 686

Lever drive motor detector plate DETECTOR PLATE,LEVER DRIVE MOTOR 1 F-4,5 614

Lever drive shaft assembly LEVER DRIVE SHAFT ASSEMBLY 1 F-4,5 693



Confidential

Lever drive shaft gear GEAR,LEVER DRIVE SHAFT 1 F-4,5 617

Lever drive transmission gear GEAR,LEVER DRIVE TRANSMISSION 1 F-2,3 616

Lever motor reduction gear GEAR,LEVER MOTOR REDUCTION 1 F-4,5 615

Lever motor T.P. detector assembly LEVER MOTER T.P. DETECTOR ASSEMBLY 1 F-4,5 704

Lower case CASE,LOWER,AA 1 F-1 127

Lower plate PLATE,LOWER,A 1 F-1 136

Main circuit board (type AB) assembly MAIN CIRCUIT BOARD,AB ASSEMBLY 1 F-4,5 705

Main circuit board unit (with MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201

Main circuit board unit (without MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201

Main plate sub assembly PLATE,MAIN,SUBU ASSEMBLY,A 1 F-1 133

Mechanism assembly (with MICR) MECHANISM ASSEMBLY 1 F-1 600

Mechanism assembly (without MICR) MECHANISM ASSEMBLY 1 F-1 600

Metallic insulator spacer INSULATOR SPACER 2 F-1 114

MICR assembly ASSEMBLY,MICR 1 F-8 782

MICR case CASE,MICR 1 F-8 783

MICR connector assembly CONNECTOR ASSEMBLY,MICR 1 F-8 786

MICR fixing MICR FIXING 1 F-8 788

MICR fixing sheet SHEET,MICR FIXING 1 F-8 791

MICR frame assembly FRAME,MICR ASSEMBLY 1 F-8 792

MICR lever LEVER,MICR 1 F-8 787

MICR lever fixing plate FIXING PLATE,MICR LEVER 1 F-8 784

MICR lever guide shaft SHAFT,MICR LEVER GUIDE 2 F-8 796

MICR lever spring SPRING,MICR LEVER 1 F-8 790

MICR roller shaft SHAFT,MICR ROLLER 2 F-8 777

MICR shield cover (type A) COVER,MICR SHIELD,A 1 F-8 785

MICR shutter SHUTTER,MICR 1 F-4 679

MICR solenoid SOLENOID,MICR 1 F-8 789

Micro switch MICROSWITCH 1 F-1 119

Motor shield case CASE,MOTOR SHIELD 1 F-3 780

Motor shield cover COVER,MOTOR SHIELD 1 F-3 781

Motor shield spacer SPACER,MOTOR SHIELD 1 F-3 779

N.E. detector adjustment screw SCREW,DETECTOR ADJUSTMENT,N.E 1 F-1 125

N.E. detector assembly lead wire LEAD WIRE N.E.DETECTOR ASSEMBLY 1 F-1 205

N.E. detector holder HOLDER,N.E.DETECTOR 1 F-1 116

N.E. detector lever LEVER,N.E.DETECTOR 1 F-1 117

N.E. detector spacer SPACER,N.E.DETECTOR 1 F-1 121




Nose guide GUIDE,NOSE 1 F-6 623

Nylon clamp NYLON CLAMP 1 F-1 150

Nylon clip NYLON CLIP 1 F-2,3 607

Nylon lock nut NYLON LOCK NUT M3 2 F-7 718

Oil ring OIL RING 2 F-6 605

Operation label (type AA) LABEL,OPERATION,AA 1 F-1 139

Operation label (type BA) LABEL,OPERATION,BA 1 F-1 140

Operation label (type DA) LABEL,OPERATION,DA 1 F-1 149

Operation label (type EA) LABEL,OPERATION,EA 1 F-1 158

Paper ejection detector assembly PAPER EJECTION DETECTOR ASSEMBLY 1 F-2,3 690

Paper ejection detector cable (type A) assembly

CABLE ASSEMBLY,PAPER EJECTION DETECTOR,A

1 F-4,5 737

Paper ejection detector cable (type B) assembly

CABLE ASSEMBLY,PAPER EJECTION DETECTOR,B

1 F-2,3 738

Paper ejection detector holder HOLDER,PAPER EJECTION DETECTOR 1 F-2,3 635

Paper end detector assembly PAPER END DETECTOR ASSEMBLY 1 F-7 710

Paper feed frame assembly PAPER FEED FRAME ASSEMBLY 1 F-7 698

Paper feed frame cover COVER,PAPER FEED FRAME 1 F-7 669

Paper feed frame fixing L lever (type A) assembly

LEVER,PAPER FEED FRAME FIXING L,A ASSEMBLY

1 F-7 701

Paper feed frame fixing lever spring (type A)

SPRING,PAPER FEED FRAME FIXING LEVER,A

2 F-7 655

Paper feed frame fixing R lever (type A) assembly

LEVER,PAPER FEED FRAME FIXING R,A ASSEMBLY

1 F-7 702

Paper feed frame shaft SHAFT,PAPER FEED FRAME 1 F-2,3 643

Paper feed frame stopper STOPPER,PAPER FEED FRAME 1 F-2,3 677

Paper feed gear GEAR,PAPER FEED 4 F-7 648

Paper feed motor MOTOR,PAPER FEED 1 F-2,3 739

Paper feed reduction gear PAPER FEED REDUCTION GEAR 2 F-2,3 729

Paper feed roller ROLLER,PAPER FEED 1 F-7 666

Paper feed roller spring SPRING,PAPER FEED ROLLER 2 F-7 654

Paper feed transmission gear GEAR,PAPER FEED TRANSMISSION 1 F-4,5 637

Paper feed trigger attraction plate PAPER FEED TRIGGER ATTRACTIVE PLATE 2 F-4,5 732

Paper feed trigger claw spring PAPER FEED TRIGGER CROW SPRING 3 2 F-4,5 731

Paper guide lever LEVER,PAPER GUIDE 1 F-7 658

Paper guide lever shaft SHAFT,PAPER GUIDE LEVER 1 F-7 639

Paper guide lever spring SPRING,PAPER GUIDE LEVER 2 F-7 652

Paper hold roller ROLLER,PAPER HOLD 1 F-7 665



Confidential

Paper hold roller shaft SHAFT,PAPER HOLD ROLLER 1 F-7 642

Paper release lever LEVER,PAPER RELEASE 1 F-7 657

Paper take-up belt PAPER TAKE UP BELT 1 F-1 153

Parallel I/F circuit board unit (without connector plate)

PARALLEL I/F CIRCUIT BOARD 1 F-1 202

Parallel pin (1.6X10) PP-A,1.6X10,S/NA 3 F-7 602

Plain washer (4.2X1X12) PLAIN WASHER,4.2X1X12,F/ZN 2 F-1 112

Platen adjustment screw SCREW,PLATEN ADJUSTMENT 2 F-7 685

Platen assembly PLATEN ASSEMBLY 1 F-7 711

Platen ground plate (type A) PLATE,PLATEN GROUND,A 1 F-7 674

Platen ground plate (type B) PLATE,PLATEN GROUND,B 1 F-7 675

Platen lever assembly LEVER,PLATEN ASSEMBLY 1 F-7 624

Platen lever drive cam CAM,PLATEN LEVER DRIVE 1 F-2,3 628

Platen lever spring SPRING,PLATEN LEVER 1 F-7 625

Platen spring SPRING,PLATEN 2 F-7 604

Power switch cable assembly POWER SWITCH CABLE SET,AA 1 F-1 203

Power switch cover COVER,POWER SWITCH,BA 1 F-1 156

Print head unit (Eb) PRINT HEAD UNIT EB 1 F-6 689

R cover detector cap CAP,R COVER DETECTOR 1 F-2,3 636

Rear cover detector assembly REAR COVER DETECTOR ASSEMBLY 1 F-2,3 692

Rear sound absorption material SOUND ABSORPTION MATERIAL,REAR 1 F-1 145

Release lever shaft SHAFT,RELEASE LEVER 1 F-7 638

Ribbon cassette cover COVER,RIBBON CASSETTE,AA 1 F-1 131

Ribbon drive plate assembly RIBBON DRIVE PLATE ASSEMBLY 1 F-6 706

Ribbon feed spring RIBBON FEED SPRING 1 F-6 601

Ribbon intermediate gear GEAR,RIBBON INTERMEDIATE 1 F-6 683

Ribbon reduction gear GEAR,RIBBON REDUCTION 1 F-6 682

Ribbon take-up gear assembly GEAR,RIBBON TAKE-UP ASSEMBLY 1 F-6 712

Right platen lever shaft SHAFT,PLATEN LEVER,R 1 F-7 627

Roll paper cover COVER,ROLL PAPER,BA 1 F-1 132

Roll paper guide GUIDE,ROLL PAPER 1 F-1 159

Roll paper holder HOLDER,ROLL PAPER,A 1 F-1 143

Roll paper path spacer SPACER,ROLL PAPER PASS 1 F-1 164

Roll paper receive roller ROLL PAPER RECEIVE ROLLER 3 F-1 154

RS-232 I/F circuit board unit (with connector plate)

RS-232 I/F CIRCUIT BOARD 1 F-1 202

Rubber foot RUBBER FOOT 3 F-1 124




Rubber insulator spacer SPACER,INSULATOR 2 F-1 113

Screw (C.B., 2.6X4) C.B.,2.6X4,F/ZN - F-4,5 773

Screw (C.B.B-tite, 2X8) C.B.B-TITE,2X8,F/ZN - F-1 118

Screw (C.B.B-tite, 4X12) C.B.B.SCREW,4X12,F/ZN - F-1 108

Screw (C.B.B-tite, 4X25) C.B.B.SCREW,4X25 F/ZN - F-1 109

Screw (C.B.P-tite, 3X6) C.B.P-TITE SCREW,3X6,F/ZN - F-2,3,4,5,7 609

Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN - F-1 101

Screw (C.B.P-tite, 3X8) C.B.P-TITE SCREW,3X8,F/ZN - F-4,5 776

Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-1 102

Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-2,3 714

Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-1 106

Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-2,3,4,5,6 726

Screw (C.C., 2X3) C.C.2X3,F/ZN - F-2,3 716

Screw (C.C., 3X5) C.C.SCREW,3X5,F/ZN - F-2,3 717

Screw (C.C., 4X20) C.C.SCREW,4X20,F/ZN - F-1 104

Screw (C.C.S-tite, 2.5X5) C.C.S-TITE SCREW,2.5*5,F/ZN - F-2,3,4,5 725

Screw (C.P.(S), 2.6X8) C.P.(S)SCREW,2.6X8.F/ZN - F-8 794

Screw (C.P.(S-P2), 2.5X5) C.P.(S-P2),2.5X5,F/Zn - F-8 793

Screw (C.P.P-tite, 3X12) C.P.P-TITE SCREW,3X12,F/ZN - F-6 608

Screw (C.P.S-tite F, 3X5) C.P.S-TITE F,3X5,F/ZN - F-2,3 715

Screw (C.P.S-tite(0), 3X6) C.P.S-TITE.(0),3X6,F/ZN - F-1 107

Screw (C.P.S-tite(P4), 3x6) C.P.S-TITE(P4),3X6,F/ZN - F-6 775

Screw (C.P.S-tite, 3X6) C.P.S-TITE SCREW,3X6,F/ZN - F-1 155

Screw (C.P.T-B, 3X10) C.P.T-B SCREW,3X10,F/ZN - F-1 103

Slip B.O.F. detector assembly SLIP B.O.F. DETECTOR ASSEMBLY 1 F-4,5 696

Slip drive gear GEAR,SLIP DRIVE 4 F-2,3,4,5,7 649

Slip feed roller ROLLER,SLIP FEED 1 F-7 668

Slip feed roller holder HOLDER,SLIP FEED ROLLER 1 F-7 659

Slip feed roller shaft holder SHAFT HOLDER,SLIP FEED ROLLER 4 F-2,3,4,5 610

Slip guide lower frame (type B) FRAME,SLIP GUID LOWER,B 1 F-4 662

Slip guide lower frame assembly (type B) FRAME,SLIP GUID LOWER,B ASSEMBLY 1 F-5 662

Slip guide upper frame FRAME,SLIP GUID UPPER 1 F-4,5 661

Slip hold roller shaft SHAFT,SLIP HOLD ROLLER 1 F-2,3 645

Slip hold roller sleeve SLEEVE,SLIP HOLD ROLLER 1 F-2,3 766

Slip hold roller spring SPRING,SLIP HOLD ROLLER 1 F-2,3 767

Slip insertion detector holder HOLDER,SLIP INSERT DETECTOR 1 F-4,5 606



Confidential

Slip paper guide PAPER GUIDE,SLIP 1 F-7 670

Slip T.O.F. detector assembly SLIP T.O.F. DETECTOR ASSEMBLY 1 F-4,5 703

Slip transmission gear GEAR,SLIP TRANSMISSION 3 F-2,3 647

Strengthening plate PLATE,STRENGTHEN,B 1 F-1 135

Sub paper feed roller assembly ROLLER,SUB PAPER FEED ASSEMBLY 1 F-7 699

Sub paper hold roller ROLLER,SUB PAPER HOLD 3 F-7 663

Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER 1 F-7 640

Sub slip feed lever shaft SHAFT,SUB SLIP FEED LEVER 1 F-4,5 644

Sub slip feed lever spring SPRING,SUB SLIP FEED LEVER 1 F-4,5 656

Sub slip feed lever sub assembly LEVER,SUB SLIP FEED SUB ASSEMBLY 1 F-4,5 687

Sub slip feed roller assembly ROLLER,SUB SLIP FEED ASSEMBLY 1 F-4,5 694

Sub slip feed roller holder HOLDER,SUB SLIP FEED ROLLER 1 F-4,5 660

Sub slip hold roller ROLLER,SUB SLIP HOLD 1 F-4,5 667

Sub slip hold sleeve SLEEVE,SUB SLIP HOLD 2 F-4,5 770

Support plate PLATE,SUPPORT,A 1 F-1 137

Table holder HOLDER,TABLE,A 1 F-1 138

Take-up assembly TAKE-UP ASSEMBLY 1 F-1 126

Take-up drive gear GEAR,TAKE-UP DRIVE 1 F-2,3 646

Take-up frame assembly FRAME,TAKE-UP ASSEMBLY 1 F-1 147

Take-up gear GEAR,TAKE-UP 1 F-1 146

Take-up pulley TAKE UP PULLEY 1 F-1 152

Take-up spring TAKE UP SPRING 1 F-1 151

Upper case CASE,UPPER,AA 1 F-1 128

Validation detector assembly VALIDATION DETECTOR ASSEMBLY 1 F-4,5 697

Validation stopper STOPPER,VALIDATION 1 F-4,5 672

Validation stopper spring SPRING,VALIDATION STOPPER 1 F-4,5 673



Reference Number List

Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN - F-1 101

Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-1 102

Screw (C.P.T-B, 3X10) C.P.T-B SCREW,3X10,F/ZN - F-1 103

Screw (C.C., 4X20) C.C.SCREW,4X20,F/ZN - F-1 104


Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-1 106

Screw (C.P.S-tite(0), 3X6) C.P.S-TITE.(0),3X6,F/ZN - F-1 107

Screw (C.B.B-tite, 4X12) C.B.B.SCREW,4X12,F/ZN - F-1 108

Screw (C.B.B-tite, 4X25) C.B.B.SCREW,4X25 F/ZN - F-1 109

Clamp CLAMP 1 F-1 110

IC cover IC COVER 1 F-1 111

Plain washer (4.2X1X12) PLAIN WASHER,4.2X1X12,F/ZN 2 F-1 112

Rubber insulator spacer SPACER,INSULATOR 2 F-1 113

Metallic insulator spacer INSULATOR SPACER 2 F-1 114

N.E. detector holder HOLDER,N.E.DETECTOR 1 F-1 116

N.E. detector lever LEVER,N.E.DETECTOR 1 F-1 117

Screw (C.B.B-tite, 2X8) C.B.B-TITE,2X8,F/ZN - F-1 118

Micro switch MICROSWITCH 1 F-1 119

Hexagon nut H.N.-1,3,F/ZN 1 F-1 120

N.E. detector spacer SPACER,N.E.DETECTOR 1 F-1 121

Caution seal SEAL,CAUTION 1 F-1 122

Connector plate (type BA) PLATE,CONNECTOR,BA 1 F-1 123

Rubber foot RUBBER FOOT 3 F-1 124

N.E. detector adjustment screw SCREW,DETECTOR ADJUSTMENT,N.E 1 F-1 125

Take-up assembly TAKE-UP ASSEMBLY 1 F-1 126

Lower case CASE,LOWER,AA 1 F-1 127

Upper case CASE,UPPER,AA 1 F-1 128

Back case CASE,BACK,AA 1 F-1 129

Front case CASE,FRONT,AA 1 F-1 130

Ribbon cassette cover COVER,RIBBON CASSETTE,AA 1 F-1 131

Roll paper cover COVER,ROLL PAPER,BA 1 F-1 132

Main plate sub assembly PLATE,MAIN,SUBU ASSEMBLY,A 1 F-1 133

Control panel unit SWITCH PANEL UNIT,AA 1 F-1 134

Strengthening plate PLATE,STRENGTHEN,B 1 F-1 135

Lower plate PLATE,LOWER,A 1 F-1 136


Confidential

Support plate PLATE,SUPPORT,A 1 F-1 137

Table holder HOLDER,TABLE,A 1 F-1 138

Operation label (type AA) LABEL,OPERATION,AA 1 F-1 139

Operation label (type BA) LABEL,OPERATION,BA 1 F-1 140

Holder plate (type A) PLATE,HOLDER,A 1 F-1 141

Holder spring SPRING,HOLDER,A 1 F-1 142

Roll paper holder HOLDER,ROLL PAPER,A 1 F-1 143

Front sound absorption material SOUND ABSORPTION MATERIAL,FRONT 2 F-1 144

Rear sound absorption material SOUND ABSORPTION MATERIAL,REAR 1 F-1 145

Take-up gear GEAR,TAKE-UP 1 F-1 146

Take-up frame assembly FRAME,TAKE-UP ASSEMBLY 1 F-1 147

Front seal SEAL,FRONT,AA 1 F-1 148

Operation label (type DA) LABEL,OPERATION,DA 1 F-1 149

Nylon clamp NYLON CLAMP 1 F-1 150

Take-up spring TAKE UP SPRING 1 F-1 151

Take-up pulley TAKE UP PULLEY 1 F-1 152

Paper take-up belt PAPER TAKE UP BELT 1 F-1 153

Roll paper receive roller ROLL PAPER RECEIVE ROLLER 3 F-1 154

Hexagon lock screw (millimeter type) HEXAGON LOCK SCREW 2 F-1 155

Screw (C.P.S-tite, 3X6) C.P.S-TITE SCREW,3X6,F/ZN - F-1 155

Power switch cover COVER,POWER SWITCH,BA 1 F-1 156

Control panel label LABEL,SWITCH PANEL,AA 1 F-1 157

Operation label (type EA) LABEL,OPERATION,EA 1 F-1 158

Roll paper guide GUIDE,ROLL PAPER 1 F-1 159

Holder plate (type B) PLATE,HOLDER,B 1 F-1 160

76 mm kit 76MM KIT 1 F-1 161

Head caution seal SEAL,CAUTION,HEAD B 1 F-1 162

Assist paper guide spacer SPACER,ASSIST PAPER GUIDE 1 F-1 163

Roll paper path spacer SPACER,ROLL PAPER PASS 1 F-1 164

Main circuit board unit (with MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201

Main circuit board unit (without MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201

Parallel I/F circuit board unit (without connector plate)

PARALLEL I/F CIRCUIT BOARD 1 F-1 202

RS-232 I/F circuit board unit (with connector plate)

RS-232 I/F CIRCUIT BOARD 1 F-1 202

Power switch cable assembly POWER SWITCH CABLE SET,AA 1 F-1 203

Control panel circuit board assembly SWITCH PANEL CIRCUIT BOARD ASSEMBLY 1 F-1 204




N.E. detector assembly lead wire LEAD WIRE N.E.DETECTOR ASSEMBLY 1 F-1 205

Circuit board FFC FFC,CIRCUIT BOARD 2 F-1 206

Control panel cable CABLE,SWITCH PANEL 1 F-1 207

Mechanism assembly (with MICR) MECHANISM ASSEMBLY 1 F-1 600

Mechanism assembly (without MICR) MECHANISM ASSEMBLY 1 F-1 600

Ribbon feed spring RIBBON FEED SPRING 1 F-6 601

Parallel pin (1.6X10) PP-A,1.6X10,S/NA 3 F-7 602

Belt drive cap CAP,BELT DRIVE 2 F-6 603

Platen spring SPRING,PLATEN 2 F-7 604

Oil ring OIL RING 2 F-6 605

Slip insertion detector holder HOLDER,SLIP INSERT DETECTOR 1 F-4,5 606

Nylon clip NYLON CLIP 1 F-2,3 607

Screw (C.P.P-tite, 3X12) C.P.P-TITE SCREW,3X12,F/ZN - F-6 608

Screw (C.B.P-tite, 3X6) C.B.P-TITE SCREW,3X6,F/ZN - F-2,3,4,5,7 609

Slip feed roller shaft holder SHAFT HOLDER,SLIP FEED ROLLER 4 F-2,3,4,5 610

Carriage spring SPRING,CARRIAGE 1 F-6 611

Front reinforcement frame FRAME,FRONT REINFORCE 1 F-4,5 612

Front frame FRAME,FRONT 1 F-4,5 613

Lever drive motor detector plate DETECTOR PLATE,LEVER DRIVE MOTOR 1 F-4,5 614

Lever motor reduction gear GEAR,LEVER MOTOR REDUCTION 1 F-4,5 615

Lever drive transmission gear GEAR,LEVER DRIVE TRANSMISSION 1 F-2,3 616

Lever drive shaft gear GEAR,LEVER DRIVE SHAFT 1 F-4,5 617

Form stopper FORM STOPPER 1 F-4,5 618

Form stopper shaft SHAFT,FORM STOPPER 1 F-4,5 619

Form stopper spring SPRING,FORM STOPPER 1 F-4,5 620

Lever drive coil (type A) COIL,LEVER DRIVE,A 1 F-4,5 621

Lever drive coil (type B) COIL,LEVER DRIVE,B 1 F-4,5 622

Nose guide GUIDE,NOSE 1 F-6 623

Platen lever assembly LEVER,PLATEN ASSEMBLY 1 F-7 624

Platen lever spring SPRING,PLATEN LEVER 1 F-7 625

Left platen lever shaft SHAFT,PLATEN LEVER,L 1 F-7 626

Right platen lever shaft SHAFT,PLATEN LEVER,R 1 F-7 627

Platen lever drive cam CAM,PLATEN LEVER DRIVE 1 F-2,3 628

Carriage belt BELT,CARRIAGE 1 F-6 629

Belt tension spring SPRING,BELT TENSION 1 F-6 630

Carriage guide shaft SHAFT,CARRIAGE GUIDE 1 F-6 631



Confidential

Carriage transmission pulley PULLEY,CARRIAGE TRANSMISSION 1 F-6 632

Carriage drive pulley PULLEY,CARRIAGE DRIVE 1 F-6 633

Carriage drive transmission gear GEAR,CARRIAGE DRIVE TRANSMISSION 1 F-6 634

Paper ejection detector holder HOLDER,PAPER EJECTION DETECTOR 1 F-2,3 635

R cover detector cap CAP,R COVER DETECTOR 1 F-2,3 636

Paper feed transmission gear GEAR,PAPER FEED TRANSMISSION 1 F-4,5 637

Release lever shaft SHAFT,RELEASE LEVER 1 F-7 638

Paper guide lever shaft SHAFT,PAPER GUIDE LEVER 1 F-7 639

Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER 1 F-7 640

Guide roller shaft SHAFT,GUIDE ROLLER 1 F-7 641

Paper hold roller shaft SHAFT,PAPER HOLD ROLLER 1 F-7 642

Paper feed frame shaft SHAFT,PAPER FEED FRAME 1 F-2,3 643

Sub slip feed lever shaft SHAFT,SUB SLIP FEED LEVER 1 F-4,5 644

Slip hold roller shaft SHAFT,SLIP HOLD ROLLER 1 F-2,3 645

Take-up drive gear GEAR,TAKE-UP DRIVE 1 F-2,3 646

Slip transmission gear GEAR,SLIP TRANSMISSION 3 F-2,3 647

Paper feed gear GEAR,PAPER FEED 4 F-7 648

Slip drive gear GEAR,SLIP DRIVE 4 F-2,3,4,5,7 649

J/S change lever LEVER,J/S CHANGE 1 F-2,3 650

J/S change spring SPRING,J/S CHANGE 1 F-2,3 651

Paper guide lever spring SPRING,PAPER GUIDE LEVER 2 F-7 652

Assist paper guide spring SPRING,ASSIST PAPER GUIDE 1 F-7 653

Paper feed roller spring SPRING,PAPER FEED ROLLER 2 F-7 654

Paper feed frame fixing lever spring (type A)

SPRING,PAPER FEED FRAME FIXING LEVER,A

2 F-7 655

Sub slip feed lever spring SPRING,SUB SLIP FEED LEVER 1 F-4,5 656

Paper release lever LEVER,PAPER RELEASE 1 F-7 657

Paper guide lever LEVER,PAPER GUIDE 1 F-7 658

Slip feed roller holder HOLDER,SLIP FEED ROLLER 1 F-7 659

Sub slip feed roller holder HOLDER,SUB SLIP FEED ROLLER 1 F-4,5 660

Slip guide upper frame FRAME,SLIP GUID UPPER 1 F-4,5 661

Slip guide lower frame (type B) FRAME,SLIP GUID LOWER,B 1 F-4 662

Slip guide lower frame assembly (type B) FRAME,SLIP GUID LOWER,B ASSEMBLY 1 F-5 662

Sub paper hold roller ROLLER,SUB PAPER HOLD 3 F-7 663

Assist paper guide PAPER GUIDE,ASSIST 1 F-7 664

Paper hold roller ROLLER,PAPER HOLD 1 F-7 665

Paper feed roller ROLLER,PAPER FEED 1 F-7 666




Sub slip hold roller ROLLER,SUB SLIP HOLD 1 F-4,5 667

Slip feed roller ROLLER,SLIP FEED 1 F-7 668

Paper feed frame cover COVER,PAPER FEED FRAME 1 F-7 669

Slip paper guide PAPER GUIDE,SLIP 1 F-7 670

Drive lever coil cover COVER,DRIVE LEVER COIL 1 F-4,5 671

Validation stopper STOPPER,VALIDATION 1 F-4,5 672

Validation stopper spring SPRING,VALIDATION STOPPER 1 F-4,5 673

Platen ground plate (type A) PLATE,PLATEN GROUND,A 1 F-7 674

Platen ground plate (type B) PLATE,PLATEN GROUND,B 1 F-7 675

Cover ground plate PLATE,COVER GROUND 1 F-7 676

Paper feed frame stopper STOPPER,PAPER FEED FRAME 1 F-2,3 677

Backup paper guide cap CAP,BACK-UP PAPER GUIDE 1 F-7 678

MICR shutter SHUTTER,MICR 1 F-4 679

Endorsement platen shutter SHUTTER,ENDORSEMENT PLATEN 1 F-4,5 680

Ribbon reduction gear GEAR,RIBBON REDUCTION 1 F-6 682

Ribbon intermediate gear GEAR,RIBBON INTERMEDIATE 1 F-6 683

Belt plate PLATE,BELT 1 F-2,3 684

Platen adjustment screw SCREW,PLATEN ADJUSTMENT 2 F-7 685

Lever drive motor assembly MOTOR,LEVER DRIVE ASSEMBLY 1 F-4,5 686

Sub slip feed lever sub assembly LEVER,SUB SLIP FEED SUB ASSEMBLY 1 F-4,5 687

Print head unit (Eb) PRINT HEAD UNIT EB 1 F-6 689

Paper ejection detector assembly PAPER EJECTION DETECTOR ASSEMBLY 1 F-2,3 690

Front cover detector assembly FRONT COVER DETECTOR ASSEMBLY 1 F-2,3 691

Rear cover detector assembly REAR COVER DETECTOR ASSEMBLY 1 F-2,3 692

Lever drive shaft assembly LEVER DRIVE SHAFT ASSEMBLY 1 F-4,5 693

Sub slip feed roller assembly ROLLER,SUB SLIP FEED ASSEMBLY 1 F-4,5 694

Lever coil mounting plate sub assembly MOUNTING PLATE,LEVER COIL SUB ASSEMBLY

1 F-4,5 695

Slip B.O.F. detector assembly SLIP B.O.F. DETECTOR ASSEMBLY 1 F-4,5 696

Validation detector assembly VALIDATION DETECTOR ASSEMBLY 1 F-4,5 697

Paper feed frame assembly PAPER FEED FRAME ASSEMBLY 1 F-7 698

Sub paper feed roller assembly ROLLER,SUB PAPER FEED ASSEMBLY 1 F-7 699

Paper feed frame fixing L lever (type A) assembly

LEVER,PAPER FEED FRAME FIXING L,A ASSEMBLY

1 F-7 701

Paper feed frame fixing R lever (type A) assembly

LEVER,PAPER FEED FRAME FIXING R,A ASSEMBLY

1 F-7 702

Slip T.O.F. detector assembly SLIP T.O.F. DETECTOR ASSEMBLY 1 F-4,5 703

Lever motor T.P. detector assembly LEVER MOTER T.P. DETECTOR ASSEMBLY 1 F-4,5 704



Confidential

Main circuit board (type AB) assembly MAIN CIRCUIT BOARD,AB ASSEMBLY 1 F-4,5 705

Ribbon drive plate assembly RIBBON DRIVE PLATE ASSEMBLY 1 F-6 706

H.P. detector assembly H.P.DETECTOR ASSEMBLY 1 F-6 707

Intermediate circuit board assembly INTERMEDIATE CIRCUIT BOARD ASSEMBLY 1 F-6 708

Carriage assembly CARRIAGE ASSEMBLY 1 F-6 709

Paper end detector assembly PAPER END DETECTOR ASSEMBLY 1 F-7 710

Platen assembly PLATEN ASSEMBLY 1 F-7 711

Ribbon take-up gear assembly GEAR,RIBBON TAKE-UP ASSEMBLY 1 F-6 712

Carriage cover frame assembly FRAME,CARRIAGE COVER ASSEMBLY 1 F-2,3 713

Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-2,3 714

Screw (C.P.S-tite F, 3X5) C.P.S-TITE F,3X5,F/ZN - F-2,3 715

Screw (C.C., 2X3) C.C.2X3,F/ZN - F-2,3 716

Screw (C.C., 3X5) C.C.SCREW,3X5,F/ZN - F-2,3 717

Nylon lock nut NYLON LOCK NUT M3 2 F-7 718

E-ring (1.5) RETAINING RING TYPE-E(1.5) - F-4,5,7 719

E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-6,7 720

E-ring (3) RETAINING RING TYPE-E(3)F/UC - F-2,3,4,5,7 721


E-ring (5) RETAINING RING TYPE-E(5) F/UC - F-4,5,6 723

E-ring (2.3) RETAINING RING TYPE-E (2.3) F/UC - F-2,3,4,5,7 724

Screw (C.C.S-tite, 2.5X5) C.C.S-TITE SCREW,2.5*5,F/ZN - F-2,3,4,5 725

Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-2,3,4,5,6 726

J/S change solenoid J/S CHANG SOLENOID 1 F-2,3 727

J/S change gear J/S CHANGE GEAR 1 F-2,3 728

Paper feed reduction gear PAPER FEED REDUCTION GEAR 2 F-2,3 729

Crank shaft holder CRANK SHAFT HOLDER 6 F-4,5,7 730

Paper feed trigger claw spring PAPER FEED TRIGGER CROW SPRING 3 2 F-4,5 731

Paper feed trigger attraction plate PAPER FEED TRIGGER ATTRACTIVE PLATE 2 F-4,5 732

Carriage motor MOTOR,CARRIAGE 1 F-6 733

Intermediate cable (type A) CABLE,INTERMEDIATE,A 1 F-6 734

Intermediate cable (type B) CABLE,INTERMEDIATE,B 1 F-6 735

Intermediate cable (type C) CABLE,INTERMEDIATE,C 1 F-6 736

Paper ejection detector cable (type A) assembly

CABLE ASSEMBLY,PAPER EJECTION DETECTOR,A

1 F-4,5 737

Paper ejection detector cable (type B) assembly

CABLE ASSEMBLY,PAPER EJECTION DETECTOR,B

1 F-2,3 738

Paper feed motor MOTOR,PAPER FEED 1 F-2,3 739




Lead wire (type A) LEAD WIRE,A 1 F-4,5 740

Lead wire (type B) LEAD WIRE,B 1 F-4,5 741

Lead wire (type C) LEAD WIRE,C 1 F-4,5 742

Lead wire (type D) LEAD WIRE,D 1 F-4,5 743

Lead wire (type E) LEAD WIRE,E 1 F-4,5 744

Lead wire (type F) LEAD WIRE,F 1 F-4,5 745

Lead wire (type G) LEAD WIRE,G 1 F-4,5 746

Lead wire (type H) LEAD WIRE,H 1 F-4,5 747

Lead wire (type I) LEAD WIRE,I 1 F-4,5 748

Lead wire (type J) LEAD WIRE,J 1 F-4,5 749

Lead wire (type K) LEAD WIRE,K 1 F-4,5 750

Lead wire (type L) LEAD WIRE,L 1 F-6 751

Lead wire (type M) LEAD WIRE,M 1 F-6 752

Lead wire (type N) LEAD WIRE,N 1 F-6 753

Lead wire (type O) LEAD WIRE,O 1 F-7 754

Lead wire (type P) LEAD WIRE,P 1 F-7 755

Lead wire (type Q) LEAD WIRE,Q 1 F-7 756

Lead wire (type R) LEAD WIRE,R 1 F-4,5 757

Lead wire (type S) LEAD WIRE,S 1 F-4,5 758

Lead wire (type T) LEAD WIRE,T 1 F-4,5 759

Lead wire (type U) LEAD WIRE,U 1 F-2,3 760

Lead wire (type V) LEAD WIRE,V 1 F-2,3 761

Lead wire (type W) LEAD WIRE,W 1 F-2,3 762

Lead wire (type X) LEAD WIRE,X 1 F-2,3 763

Lead wire (type Y) LEAD WIRE,Y 1 F-2,3 764

Lead wire (type Z) LEAD WIRE,Z 1 F-2,3 765

Slip hold roller sleeve SLEEVE,SLIP HOLD ROLLER 1 F-2,3 766

Slip hold roller spring SPRING,SLIP HOLD ROLLER 1 F-2,3 767

Gear train cover COVER,GEAR TRAIN 1 F-6 768

Intermediate circuit board cover COVER,INTERMEDIATE CIRCUIT BOARD 1 F-6 769

Sub slip hold sleeve SLEEVE,SUB SLIP HOLD 2 F-4,5 770

Intermediate cable tube TUBE,CABLE INTERMEDIATE 1 F-6 771

C-ring (5103-21) C-RING,5103-21 2 F-7 772

Screw (C.B., 2.6X4) C.B.,2.6X4,F/ZN - F-4,5 773

J/S solenoid mounting plate MOUNTING PLATE,J/S SOLENOID 1 F-2,3 774

Screw (C.P.S-tite(P4), 3x6) C.P.S-TITE(P4),3X6,F/ZN - F-6 775



Confidential

Screw (C.B.P-tite, 3X8) C.B.P-TITE SCREW,3X8,F/ZN - F-4,5 776

MICR roller shaft SHAFT,MICR ROLLER 2 F-8 777

E-ring (1.2) RETAINING RING TYPE-E(1.2) F/UC - F-8 778

Motor shield spacer SPACER,MOTOR SHIELD 1 F-3 779

Motor shield case CASE,MOTOR SHIELD 1 F-3 780

Motor shield cover COVER,MOTOR SHIELD 1 F-3 781

MICR assembly ASSEMBLY,MICR 1 F-8 782

MICR case CASE,MICR 1 F-8 783

MICR lever fixing plate FIXING PLATE,MICR LEVER 1 F-8 784

MICR shield cover (type A) COVER,MICR SHIELD,A 1 F-8 785

MICR connector assembly CONNECTOR ASSEMBLY,MICR 1 F-8 786

MICR lever LEVER,MICR 1 F-8 787

MICR fixing MICR FIXING 1 F-8 788

MICR solenoid SOLENOID,MICR 1 F-8 789

MICR lever spring SPRING,MICR LEVER 1 F-8 790

MICR fixing sheet SHEET,MICR FIXING 1 F-8 791

MICR frame assembly FRAME,MICR ASSEMBLY 1 F-8 792

Screw (C.P.(S-P2), 2.5X5) C.P.(S-P2),2.5X5,F/Zn - F-8 793

Screw (C.P.(S), 2.6X8) C.P.(S)SCREW,2.6X8.F/ZN - F-8 794

Head seal SEAL,HEAD 1 F-6 795

MICR lever guide shaft SHAFT,MICR LEVER GUIDE 2 F-8 796



Rev. B Exploded Diagrams Appendix F-1

TM-U675/U675P (without autocutter) Service ManualCoAppExp

TM-U

126

103

151

154

154

103

146

103

119

118

152

105

121125

142 141

147

205

150

117

143

116

101

120

124

122203

127

124

159

160

161

nfidentialendix Floded Diagrams

675/U675P

SERIAL

PARALLEL

158132

131

157

139

110

106

162

149

204600

102

109

112

113

114

109

113

114108

133

106

108

135

137

124

103 148

156103

106

136

138

107

107

107

107

107

107

201

206

106

106

106111

140

128

130

207

134104

103

144 145

129

153

164

163

202

112

155

107

107

202

155

123


TM-U675/U675P (without autocutter) Service ManualCoMec

691

714636

692

715764763

765

677

684

726726

717646

721729

726

647

647

651

6726

727

774

721

650

647

649

721728

724

721729

643

nfidentialhanism Assembly (without MICR)

725

635

738

714

690

609

714

713

610

645

721

616

717

721

628

739

760761762

610766

767

607

726

71



726

691

714636

692

715764763

765

677

684

726726

717646

721729

726

647

647

651

6726

727

774

721

650

647

649

721728

724

721729

643

nfidentialhanism Assembly (with MICR)

725

635

738

714

690

609

714

713

610

645

721

616

717

721

628

781

725

739

780

779

726

760761762

610766

767

607

726

71


TM-U675/U675P (without autocutter) Service ManualCoFram

726

705

745746747

704

726

726

649

721610

730723

637

721

686

656687

620

719

618

660725

740 741

nfidentiale Assembly (without MICR)

726

721610

726680

703748749750

661

667

613

612

726

726

726

726

671

732

732

621

622

731

731

609

609

695

726

726

662

673

606

696

609

742743744

737

719

724619

694

615614

773

617

730

644726

693

679

697

757758759

776

672

770

770



726

705

745746747

704

726

726

649

721610

730723

637

721

686

656

620

719

618

660725

740 741

nfidentiale Assembly (with MICR)

726

721610

726680

703748749750

661

667

613

612

726

726

726

726

671

732

732

621

622

731

731

609

609

695

726

726

662

673

606

696 609742743744

737

644

719

687

724619

694

615614

773

617

730

726

693

697

757758759

776

776

672

770

770


TM-U675/U675P (without autocutter) Service ManualCoCarr

726

nfidentialiage Assembly

608

623

689

720

603

633

775707

720

720

629

706

634

768

712

682

683601

720

603

632

753

751752

605

611

709

775

775

733

630

734

726

775775

769

735

771

708

736

723

631

726

795


TM-U675/U675P (without autocutter) Service ManualCoPF A

625

609

699

663

641

640

648

722

730602

648

722

702

655

722

720

663

638

675

602

730

639

648722

nfidentialssembly

685 711

685626

718

721

604

604

668

670659

624

674

654

678

666

642

663

654

658

652

724

724

721

664

772665

772 653

627

648

722

718

602649

701

609676

655

722

730

669

698

719 657

710

720

756755754

722

722730

721


TM-U675/U675P (without autocutter) Service ManualCoMIC

777

784

794

nfidentialR Unit

785

782

786

793

790

792

783

777

787

791

788

789

778

778

796

796

Rev. B General Lubrication Point Diagrams Appendix G-1

TM-U675/U675P (without autocutter) Service ManualCoAppGe

TM-U

G-36

G-36

G-36

nfidentialendix G

neral Lubrication Point Diagrams

675/U675P

SERIAL

PARALLEL



G-36

G-36

G-36

G-36

G-36

nfidentialhanism Assembly (without MICR)

G-36

G-36



G-36

G-36

G-36

G-36

G-36

nfidentialhanism Assembly (with MICR)

G-36

G-36



G-48

G-48

G-48

G-48

nfidentiale Assembly (without MICR)

G-36

G-48

G-48

G-48

G-48

G-36

G-36

G-36

G-36



G-48

G-48

G-48

G-48

nfidentiale Assembly (with MICR)

G-36

G-48

G-48

G-48

G-48

G-36

G-36

G-36

G-36


TM-U675/U675P (without autocutter) Service ManualCoCarr

nfidentialiage Assembly

G-36

G-36

G-36

G-36

G-36

G-36

G-36

G-36G-36

G-36

G-36

G-36

G-36

G-36O-10

G-36

G-36

G-36

O-10


TM-U675/U675P (without autocutter) Service ManualCoPF A

G-48

G-48

nfidentialssembly

G-36

G-36

G-36

G-48

G-48


TM-U675/U675P (without autocutter) Service ManualCoMIC

nfidentialR Unit

G-47

G-47

Rev. B Circuit Board Unit Circuit Diagrams Appendix H-1

TM-U675/U675P (without autocutter) Service ManualCoAppCirc

Main

page H-4

page H-5

nfidentialendix Huit Board Unit Circuit Diagrams

Circuit Board Assembly (Outline)

MICR I/F block (page H-6)

page H-2

page H-3


TM-U675/U675P (without autocutter) Service ManualCoMain

nfidential Circuit Board Assembly (1 of 4)



nfidential Circuit Board Assembly (MICR I/F Block)



nfidential Circuit Board Assembly (Memory Block)


TM-U675/U675P (without autocutter) Service ManualCoRS-2

TP2

DK 1 1

DK S 2

PG 3

PG 4

+24V 5

+24V 6

PG 7

HOST RTS 8

CTS 9

RTS 11I/F DET 10

CLKOUT/DTR 12

CLKREQ 13

SG 14

+5V 15

DK 2 16

DK G 17

DK P 18

PG 19

+24V 20

+24V 21

PG 22

SG 23

SD 24

RD 25

(RES) 26

#25_RESET 27

DSR_RESET 28

#RESET 29

SG 30

CN2

DSRRTS

TO MAIN BOARD

+5V

ETT

C5

R1

R21

Q1

RDSD

DTR

RTS

+5V

SG

SG

SG

TP1

10K10K

10K10K

Q2

nfidential32 I/F Circuit Board Assembly (UB-S01) Circuit Diagram

DSR

+12V

+5VC1

VCC 16

C2+ 4

C2- 5

R1I 13

R2I 8

T1O 14

T2O 7

GND 15

V+ 2

C1+ 1

C1- 3

R1O 12

R2O 9

T1I 11

T2I 10

V- 6

U1

C2

C7

DSR

SD

RD

DTR

FG 1

SD/SD1 2

RD/SD2 3

RS/RD1 4

/RD2 5

DR/INIT1 6

SG 7

/DR1 8

/DR2 9

/CS1 10

/CS2 11

12

13

14

15

16

17

18

19

ER20

21

22

23

24

INIT2 25

SHELL 0

CN1

SG

RTS

TO HOST

C3

DTRSD

DSRRD

+12V

SG

RTS

DTR

SDRD

+5V

+5V

SG

RTS

SG

DSR_RES#25_RESE

+12V

-12V

R7

R3

+5V

+12V

RTS

#25|RESET

DSR|RESET

D1

D2R5

R2

R16

R4

R17

R18

C6

3

2 1

8

4

U2A

R20SG

DSR

R11

#25INIT

D3

D4

-12V

R13

R14

R6R15

C4

R10

R19

R12

5

6 7

U2B

SG

+12V

-12V

R9

R8

-12V


TM-U675/U675P (without autocutter) Service ManualCoPara

nfidentialllel I/F Circuit Board Assembly (UB-P02) Circuit Diagram


TM-U675/U675P (without autocutter) Service ManualCoRS-4

TP2

+5V

C5

R17

R16

R18

DK 11

DK S2

PG3

PG4

+24V5

+24V6

PG7

HOST_RTS8

CTS9

DET10

RTS11

CLKIN/DTR12

CLKREQ13

SG14

+5V15

DK 216

DK G17

DK P18

PG19

+24V20

+24V21

PG22

SG23

SD24

RD25

(RES)26

#25_RESET27

DSR_RESET28

#RESET29

SG30

CN2

+5V

+5VSGSG

SGCTS

DR

TO MAIN BOARD

TP1

R15R7

R14R19

SG

SG

RDSD

nfidential85 I/F Circuit Board Assembly (UB-S02) Circuit Diagram

+5VR12

1

2

3

4

8

7

6

5

U2R13R9

R8

R1

R2

FG 1

SD/SD1 2

RD/SD2 3

RS/RD1 4

/RD2 5

DR/INIT1 6

SG 7

/DR1 8

/DR2 9

/CS110

/CS2 11

12

13

14

15

16

17

18

19

ER20

21

22

23

24

INIT2 25

SHELL 0

CN1

FG

TO HOST

R6

R3

R11 R4

1

2

3

4

8

7

6

5

U1

R10

R5

CS1CS1

CS2 CS2

DR1

DR2

RD1

RD2

SD1

SD2 +5V

+5VCTS

CTS

SD

RD

SG

SG

DR

DR

SDRD

SG

SGSG

CS1CS2DR1DR2

RD2RD1

SD1SD2

SG

FG

TM-U675/U675P (with MICR) Service ManualConfidential
Appendix IPrinter Handling
Using the Power Switch Cover

WARNING:If an accident occurs when the power switch cover is attached, unplug the power cord from the outlet immediately to avoid fire or shock.

You can use the enclosed power switch cover to make sure the power switch is not accidentally pressed. The illustration below shows the power switch cover installed.

Figure I-1 Power switch cover

If you need to turn the power on or off when the cover is installed, you can insert a thin tool into one of the holes in the cover to operate the switch.

switch cover

Rev. B Printer Handling Appendix I-1

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Opening the Front Cover
You can open the front cover of the printer by using the tabs on each side of the cover.

Figure I-2 Opening the front cover

Installing or Replacing the Paper Roll

You need to install a paper roll even if you are using only the slip or validation sections of the printer.

Note:Do not use paper rolls that have the paper glued or taped to the core because they might cause a paper jam.

1. Make sure the printer is turned on.

2. To prevent data loss make sure that the printer is not receiving data.

tab

Appendix I-2 Printer Handling Rev. B

3. Open the paper roll cover by lifting up the two tabs on the paper roll cover and then pushing
the cover back.

Figure I-3 Opening the paper roll cover

4. Remove the used paper roll core if there is one.

5. Insert the paper roll as shown.

Figure I-4 Inserting the paper roll

tab

tab


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6. Be sure to note the correct direction that the paper should come off the roll.
Figure I-5 Correct direction

7. Hold both edges of the paper and insert it into the paper slot. The paper is automatically fed into the printer.

Figure I-6 Inserting the paper into the paper slot

paper slot


8. When using 2-ply roll paper, insert the end of the journal paper into the take-up spool as
shown below. Be sure that 40 to 60 mm (1.5 to 2.25 in.) of paper extends beyond the spool and that the right side of the paper is against the spool’s flange.

Figure I-7 Inserting the end of the journal paper into the take-up spool

9. Insert the take-up spool and tear off the receipt paper, as shown below.

Figure I-8 Inserting the take-up spool

Removing paper

If you need to remove roll paper before it is all gone, follow these steps:

1. Lift up the take-up spool with the journal paper attached.


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2. Cut the paper off behind the paper insert slot.
3. Push the release lever (located on the right side of the paper roll).

Then pull out the remaining paper in the paper feed direction. Always pull paper in the paper feed direction to prevent damage to the printer mechanism.

Figure I-9 Removing the paper

➀➀➀➀

➁➁➁➁

➂➂➂➂


Installing the Ribbon Cassette
To install the ribbon cassette for the first time or to replace a used ribbon, follow the steps below:

Note:Be sure to turn on the power before installing a ribbon cassette.

1. Unpack the ribbon cassette and turn the knob in the direction shown to take up any slack.

Figure I-10 Turning the knob

2. Open the front cover of the printer, using the tabs on each side of the cover.

Figure I-11 Opening the front cover

3. Remove the old ribbon, if there is one.

knob

tab


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4. Insert the new ribbon cassette as shown.
Figure I-12 Inserting the new ribbon cassette

5. Turn the knob two or three times to make sure the ribbon is seated correctly. You can also look at the side of the slip unit to see if the ribbon is in the correct place. See below.

Figure I-13 Making sure if the ribbon is seated correctly

6. Close the front cover of the printer.

EPSON recommends the use of genuine EPSON ribbon cassettes. Ribbon cassettes not manufactured by EPSON may cause damage to your printer that is not covered by EPSON’s warranties.

edge of ribbon cassette


Inserting Slip Paper
When you insert slip paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below.

Figure I-14 Inserting slip paper

Inserting Validaton Paper

When you insert validation paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below.

Figure I-15 Inserting validaton paper

➀➀➀➀➁➁➁➁

➀➀➀➀➁➁➁➁


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Reading MICR Characters On Personal Checks
To use the MICR function with personal checks (for printers with the factory-installed optional MICR reader), follow the steps below:

CAUTION: Do not insert checks with staples in them. This may cause paper jams, MICR reading errors, and damage to the MICR head.

Note:Be sure that the checks are flat, without curls, folds, or wrinkles.

1. Wait until the computer sends the FS a 0 command to the printer, causing it to enter the MICR mode. The SLIP light blinks.

2. Turn the check over so that it is face up with the MICR characters on the right side. The MICR characters must be next to the right edge of the paper inlet.

Figure I-16 Inserting a check

3. Insert the check straight into the paper inlet, using the right edge of the paper inlet as a guide.

4. Insert the check as far as it will go. The printer will detect the check and start drawing it in.

5. When the printer starts drawing it in, let go of the check immediately. Otherwise, the check may not be fed straight, and there could be a paper jam or a MICR reading error. The SLIP light quits blinking but stays on.

6. When printing and MICR reading are finished, the printer ejects the check and the SLIP light starts blinking again.

7. Remove the check by pulling it straight up; do not pull it at an angle. The SLIP light goes off.

MICR characters on this side face up


Adjusting the Roll Paper Near End Detector
The paper near end detector detects when paper is almost gone by measuring the diameter of the paper roll. The detector has five settings. The factory setting (#5) leaves the least paper on the roll when the near-end sensor is triggered. If you want more paper on the roll when the sensor is triggered, choose one of the other settings, using the procedure below.

Note:Because of variations in paper roll cores, it is not possible for the detector to measure exactly the length of paper left on the roll when the detector is triggered.

1. Open the paper roll cover, and remove the paper roll.

2. Loosen the adjusting screw with a coin, and carefully move the detecting lever down. At the factory the lever is set at the highest position (#5). As you move the lever down through the five positions, you increase the amount of paper left on the roll when the near-end sensor is triggered.

Figure I-17 Adjustment screw and detecting lever

3. When you have moved the lever where you want it, tighten the adjusting screw, and check to be sure that the detecting lever moves freely.

4. Replace the paper roll.

adjusting screw

detecting lever


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Using the Control Panel
Most of the functions of this printer are governed by software, but you can monitor the printer’s status by looking at the lights on the control panel, and for some procedures you will use the buttons.

Control Panel

Figure I-18 Control panel

POWER

This light is on when the power is turned on.

ERROR

When this light is on but not blinking, it means that the printer is offline. Check to see if a cover is open. When this light is blinking, there is an error. If you see this light blinking, turn off the printer for a few seconds and then turn it back on. If the light is still blinking, see Chapter 1 Troubleshooting.

PAPER OUT

This light comes on when the printer is out or nearly out of roll paper. The printer has a paper end detector, and it also has a near-end detector (which can be adjusted) to warn you that the printer is nearly out of paper. See previous section if you want to adjust this detector.

This light blinks during the self-test printing standby state or macro execution standby state (when the macro execution command is used).

SLIP

This light blinks when the printer is ready to receive slip paper. It stays on during printing on slip paper and blinks again when slip paper should be removed.

Control Panel Buttons

The control panel has two paper buttons that you may have to use, although most paper handling functions will be handled by your software.


FEED
Use this button to feed roll paper or to start a roll or validation paper self test.

RELEASE

Use this button to release slip paper or to start a slip or validation paper self test.


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Appendix JScrew Types
Figure J-1 Screw configuration

Table J-1 Screw types

Head (top) Head (side) Body Washer (assembled)

C (Cross) P (Pan)

B (Bind)

C (Cup)

S-tite

B-tite

P-tite

T-B

(S) (Spring lock washer)

(S-P1)/(S-P2)/(S-P3)/(S-P4) (Spring lock washer + plain washer )

(O) (Outside toothed lock washer)

(P1)/(P2)/(P3)/(P4) (Plain washer)

(O-P1) (Outside toothed washer + plain washer)

Head (top)

Head (side)

Washer (assembled)

Body

Rev. B Screw Types Appendix J-1

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Appendix J-2 Screw Types Rev. B

Appendix KParts Layout
Main Circuit Board Unit (Parts Side)

(memory board)

Rev. B Parts Layout Appendix K-1

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Main Circuit Board Unit (Solder Side)
(memory board)

Appendix K-2 Parts Layout Rev. B

RS-232 I/F Circuit Board Assembly (UB-S01)
Parallel I/F Circuit Board Assembly (UB-P02)

RS-485 I/F Circuit Board Assembly (UB-S02)

C5

15143029

121617

R7

U1

11

R1TP1

R9

13

25

1

14

R2CN1

R3

R

CMK-G2X

R4

U2

R11

R12

R13

R8

R15 TP2

R5 R18

R14 R16 R19R17

R10R6

CN2 RS485-30P

BOARD

Rev. B Parts Layout Appendix K-3

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Appendix K-4 Parts Layout Rev. B

Addendum 1Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)
EPSON provides an optional model of the TM-U675 for customers, such as banking and financial institutions, that want to use the slip and MICR functions of the printer without loading roll paper. This model contains two paper path spacers and special firmware on the main circuit board unit.

Information throughout the main part of this manual applies to the TM-U675 model that does not use these paper path spacers. This addendum explains only the differences for the TM-U675 model that uses paper path spacers.

When performing maintenance on the TM-U675 model that supports paper path spacers, use this addendum along with the main part of this manual.

For brevity, this addendum refers to the TM-U675 model that uses paper path spacers as the “PPSS model,” and it refers to the TM-U675 model that does not use paper path spacers as the “PPSUS model.”

Note that this model is called as the validation/slip model from sales point of view.

The contents of this addendum are shown below.

Addendum Table 1-1 Contents of this addendum

Item Content

TM-U675 PPSS model configuration

Explains the differences between the parts for the TM-U675 PPSS model and the TM-U675 PPSUS model.

TM-U675 PPSS model repair Lists precautions when repairing the TM-U675 PPSS model.

How to identify the TM-U675 PPSS model

Explains how to identify the TM-U675 PPSS model.

Attaching and removing the spacers

Explains how to attach and how to remove the spacers.

Setting the threshold values for the detectors

Explains how to set the threshold values for the detectors on the TM-U675 PPSS model.

Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-1

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TM-U675 PPSS Model Configuration
The following three components differ between the TM-U675 PPSS model and the TM-U675 PPSUS model.

Note: The only difference between the main circuit board unit for the PPSS and PPSUS model is in the

firmware.

The assist paper guide spacer and the roll paper path spacer are both called “paper path spacers” in this addendum.

TM-U675 PPSS model is shipped with the paper path spacers installed. It is possible for the customer to remove the paper path spacers from the TM-U675 PPSS model.

Addendum Table 1-2 Configuration of the TM-U675 PPSS model

Part names in the addendum(Part names in the price list)

TM-U675 PPSS model

TM-U675 PPSUS model

assist paper guide spacer(spacer,assist paper guide)

Installed Not installed

roll paper path spacer(spacer,roll paper pass)

Installed Not installed

main circuit board unit(main circuit board unit)

The main circuit board unit for the PPSS model is installed.

The main circuit board unit for the PPSUS model is installed.

Addendum 1-2 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B

TM-U675 PPSS Model Repair
Observe the following precautions when repairing the TM-U675 PPSS model.

Always use the main circuit board unit for the PPSS model. Normal operation cannot be guaranteed if you use the the main circuit board unit for the PPSUS model.

Always set the threshold values for the detectors with the paper roll removed and paper path spacers installed.


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How to Identify the TM-U675 PPSS Model
Before starting your maintenance work, use the following procedures to verify that the printer you are working on is a TM-U675 PPSS model.

1. Check the manufacturing nameplate on the right side of the printer, when you are facing the front of the printer.

Addendum Figure 1-1 Location of the manufacturing nameplate

2. Check the type code inscribed on the manufacturing nameplate. Check Addendum Table 1-3 for the type code corresponding to TM-U675 PPSS model.

Addendum Figure 1-2 Checking the type code

Note:Type codes may be added or changed. Always check them using the latest manual.

Addendum Table 1-3 Type code corresponding to the PPSS model

Type code for the PPSS model

121

Manufacturing nameplate

Type code


Installing and Removing the Paper Path Spacer
Removing the Paper Path Spacer



3. Insert the tip of a pen or tweezers into the perforation in the assist paper guide spacer and lift the assist paper guide spacer directly vertical.

Addendum Figure 1-3 Lifting the assist paper guide spacer

4. Lift the assist paper guide spacer and pull it out from the roll paper ejection slit.

Addendum Figure 1-4 Pulling out the assist paper guide spacer

Step 1.Insert the tip of a pen or tweezers into the perforation in the assist paper guide spacer.

Step 2.Lift the assist paper guide spacer directly up.

Assist paper guide spacer

Roll paper ejection slit

Lift the assist paper guide spacer



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5. Lift the edge of the roll paper path spacer and pull the tab out from the guide roller
shaft.

Addendum Figure 1-5 How to pull out the tab

6. While holding down the right side of the sub paper hold roller shaft, grasp the tab on the roll paper path spacer and pull out the roll paper path spacer along the paper path.

Addendum Figure 1-6 Removing the roll paper path spacer

Tab

Roll paper path spacer

Guide roller shaft


Tab



Installing the Paper Path Spacer
The hard surface of the roll paper path spacer is the face. The soft surface is the back. When the tab is facing up and you are looking at the face, the center opening is slightly right of center.

Addendum Figure 1-7 Checking the front and back of the roll paper path spacer



3. Push the right side of the sub paper hold roller shaft down.

4. Place the face of the roll paper path spacer up and insert along the paper path until it touches.

Addendum Figure 1-8 Inserting the roll paper path spacer

5. Check that the roll paper path spacer is completely inserted all the way until it touches. Release the sub paper hold roller shaft that you are holding down.

Tab

Center opening is slightly right of center


Face is hard

Back is soft


Tab



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6. Push the tab on the roll paper path spacer with your fingertips, bend it upward, and fit it
under the guide roller shaft.

Addendum Figure 1-9 Fitting the tab

7. Fold the perforations of the assist paper guide spacer as shown in the following figure.

Note:When you use the perforation as a boundary, the side with a notch is the back, the side without a notch is the front.

Addendum Figure 1-10 Folding perforation

Bend tab upward

Fit tab under guide roller shaft

Guide roller shaft

Notch

The side with a notch is the back.

The side without a notchis the front.

Perforation Assist paper guide spacer


8. Pinch the front and back of the assist paper guide spacer with your fingertips and insert
the front into slit A and the back into slit B.

Note:There are two slits. The slit closest to the manual cutter blade is “slit A” and the slit farthest from the manual cutter blade is “slit B.” A partition separates “slit A” and “slit B.”

Addendum Figure 1-11 Inserting the assist paper guide spacer

9. Insert the front of the assist paper guide spacer vertically into slit A along the partition until you feel it touch.

Addendum Figure 1-12 Inserting the assist paper guide spacer

Manual cutter blade

The slit closest to the manual cutter blade is “slit A.”

The slit farthest from the manual cutter blade is “slit B.”

Partition

Front

Back


Step 1.Position the front vertically.

Step 2.Insert until you feel it touch.



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10. Push the perforation of the assist paper guide spacer while pressing the release lever.
Release the release lever when you hear a “click” and you feel it engage.

Addendum Figure 1-13 Checking that it is engaged and that there was a “clicking” sound

11. Remove the take-up assembly.

12. Open the clamshell mechanism.

13. Check that the assist paper guide is closed. If the assist paper guide is not closed, close the clamshell mechanism, remove the assist paper guide spacer, and repeat from step 8.

Note:Press the assist paper guide with an appropriate amount of force. If the assist paper guide does not move, it is closed. If the assist paper guide moves, it is not closed.

Addendum Figure 1-14 Checking the assist paper guide

14. Close the clamshell mechanism.

15. Attach the take-up assembly.

16. Set the threshold values for the detectors.

Step 1.Press the release lever

Step 2.Push the perforation of the assist paper guide spacer


Assist paper guideClamshell mechanism

Press the assist paper guide with an appropriate amount of force to check.


Setting Threshold Values for Detectors
Do this when you have removed or replaced any of the following.

CAUTION:Work indoors to avoid direct sunlight when setting the values. Use normal fluorescent lighting available in most rooms. You will not be able to make accurate setting if there is natural light (sunlight) or man-made light sources (lamps, etc.) other than fluorescent lighting.

Allow all the light from the fluorescent bulb to enter the printer when working. You will not be able to make accurate adjustments if you allow a shadow to fall on the printer or you turn off the fluorescent lighting while working.

1. Check that the paper path spacers are installed.

2. Install the paper path spacers if they are not installed. If roll paper is installed, remove it.

Note:The paper path spacers must be installed correctly to set the threshold values of the detectors accurately.

3. Remove slip paper if it is inserted.

Note:You cannot make accurate settings if slip paper is present.

4. Connect the power supply to the printer.

5. Attach the ribbon cassette.


7. Turn ON the power switch for the printer while holding down the FEED and RELEASE buttons at the same time.

8. Press the RELEASE button 7 times.


Items Requiring Setting

The slip T. O. F. detector assembly.

The slip B. O. F. detector assembly.

The paper ejection detector assembly.

The validation detector assembly.

The mechanism assembly.

The main circuit board unit.


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10. Check that the SLIP LED is flashing. If it is not flashing, repeat from step 6.
11. Insert a slip.

Note:The printer automatically sets the detectors and saves the setting values in the main circuit board unit; then it prints the setting values on the slip paper.

12. If the customer uses the TM-U675 PPSS model with the paper path spacers removed, remove the paper path spacers.

13. Remove the ribbon cassette.


SEIKO EPSON CORPORATION Printed in Japan

EPSON

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