epson epl-5500w service manual
TRANSCRIPT
EPSON TERMINAL PRINTER
EPL-5500WSERVICE MANUAL
EPSON4005668
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NOTICE
All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKOEPSON’s express written permission is forbidden.
The contents of this manual are subjects to change without notice.
All efforts have been made to ensure the accuracy of the contents of this manual. However, should anyerrors be detected, SEIKO EPSON would greatly appreciate being informed of them.
The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual orthe consequence thereof.
Epson is a registered trademark of Seiko Epson Corporation.
General Notice:Other product names used herein are for identication purposes only and may be trademarksof their respective campanies.
Copyright © 1995 by SEIKO EPSON CORPORATION Nagano, Japan
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PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage toequipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Greatcaution should be exercised in performing procedures preceded by DANGER Headings.
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/ mainte-nance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI-PHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITHBASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS INTHEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CON-NECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THEPOWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKINGON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI-FIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE,LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS APRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CON-NECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THEPOWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDSAND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATICDISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSINGINTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BYTHE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAP-PROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLEEPSON WARRANTY.
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SAFETY INFORMATION
This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser,provided the printer is operated according to the instructions in this manual provided.
Since radiation emitted by the laser is completely confined within protective housings, the laser beam cannot escapefrom the machine during any phase of user operation.
For United States Users;
[Laser Safety]
This printer is certified as a Class 1 Laser product under the U.S. Department of Health andHuman Services (DHHS) Radiation Performance Standard according to the Radiation Controlfor Health and Safety Act of 1968. This means that the printer does not produce hazardous laserradiation.
[CDRH Regulations]
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Adminis-tration implemented regulations for laser products on August 2, 1976. Compliance is mandatoryfor products marketed in the United States. The label shown below indicates compliance withthe CDRH regulations and must be attached to laser products marketed in the United States.
WARNING : Use of controls, adjustments or performance of procedures other thanthose specified in this manual may result in hazardous radiation exposure.
[Internal Laser Radiation]
Maximum Radiation Power: 5.0× 10-4 (W)Wave Length: 790 ± 20 nm
This is a Class IIIb Laser Diode Assay that has an invisible laser beam. The print head unit isNOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under anycircumstances.
For Other Countries Users;
WARNING : Use of controls, adjustments or performance of procedures other thanthose specified in this manual may result in hazardous radiation exposure.
This is a semiconductor laser. The maximum power of the laser diode is 5.0× 10-4
W and the wavelength is 790± 20 nm.
For Denmark Users;
ADVARSELUsynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgåudsættelse for stråling.
Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.
For Finland, Sweden Users;
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VAROITUSLaitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altis-taa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteiylle.
VARNINGOm apparaten används på annat sätt än i denna bruksanvisning specificerats, kananvändaren utsättas för osynlig laserstrålning, som överskrider gränsen för laser klass1.
For Finland, Sweden Service People
VAROITUSAvattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle laser-säteilylle. Äläkatso säteeseen.
VARNINGOsynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ejstrålen.
For Norway Users;
ADVARSELDersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kanbrukeren utsettes for unsynlig laserstråling som overskrider grensen for laser klasse 1.
Dette er en halvleder laser. Maksimal effeckt til laserdiode er 5.0× 10-4 W ogbølgelengde er 790± 20 nm.
Laser Safety Labels
[Label on rear printer case]
A laser safety labels is attached on the outside of the printer shown below.
For United State
For Europe
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[Label inside printer]
The following laser safety label will be attached inside the printer as shown below.
For Denmark, Finland, Sweden, and Norway
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PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair ofEPL-5500W.The instructions and procedures included herein are intended for the experience repair technician, and attentionshould be given to the precautions on the preceding page. The chapters are organized as follows:
CHAPTER 1. GENERAL DESCRIPTIONProvides a general product overview, lists specifications, and illustrates the main components of the printer.
CHAPTER 2. OPERATING PRINCIPLESDescribes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLYIncludes a step-by-step guide for product disassembly and assembly.
CHAPTER 4. ADJUSTMENTSIncludes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTINGProvides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCEDescribes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIXDescribes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice.
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REVISION SHEET
Revision Issue Date Revision Page
Rev. A November 24, 1995 1st issue
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TABLE OF CONTENTS
CHAPTER 1. GENERAL DESCRIPTIONCHAPTER 2. OPERATING PRINCIPLESCHAPTER 3. DISASSEMBLY AND ASSEMBLYCHAPTER 4. ADJUSTMENTSCHAPTER 5. TROUBLESHOOTINGCHAPTER 6. MAINTENANCEAPPENDIX
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Chapter 1 General Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-31.2.1 Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.3 Reliability Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.4 Environmental Conditions for Operating (Include Imaging Cartridge) . . . . 1-51.2.5 Environmental Conditions for Storage and Transportation . . . . . . . . . . . . 1-51.2.6 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.7 Specifications for Consumable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.9 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.3 INTERFACE SPECIFICATIONS 1-91.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.4 OPERATING INSTRUCTIONS 1-91.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-91.4.2 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1.4.2.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-101.4.2.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1.4.3 Printing Resolution Host PC Capability Dependency. . . . . . . . . . . . . . . . 1-11
1.5 MAIN COMPONENTS 1-121.5.1 C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-131.5.2 PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-141.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-141.5.4 Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-151.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-151.5.6 Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-161.5.7 Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
List of Figures
Figure 1-1. Exterior View of the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Figure 1-2. Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Figure 1-3. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Figure 1-4. Component Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12Figure 1-5. C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Figure 1-6. PWB-E Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-7. PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-8. Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15Figure 1-9. Fusing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15Figure 1-10. Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16Figure 1-11. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
List of Tables
Table 1-1. Options for the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Table 1-2. Paper Feed Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-3. Paper Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-4. Usability of Special Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Table 1-5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Table 1-6. Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10Table 1-7. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10Table 1-8. Host PC Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Rev. A 1-iii
1.1 FEATURES
The EPSON EPL-5500W laser printer has a 300/600 dots per inch (dpi) resolution and 6 pages per minute(ppm) printing speed in a dedicated Microsoft® Windows Printing System. It works under MicrosoftWindows 3.1x and Windows 95, achieving very high performance due to the recent advances in PCtechnology. The main features are:
❏ No ozone
❏ Printing speed — 6 ppm
❏ Resolution — 600/300 dpi
❏ Light weight — about 5 kg (11 lb)
❏ Small footprint
❏ Low running cost: separation of the development/toner cartridge and photoconductor unit
❏ Ease of use with Microsoft Windows Printing System (WPS)
❏ PCL4 software emulation mode
❏ High throughput, especially with fine-pitch halftone image output
❏ Freedom from the memory overflow
❏ Freedom from document incompatibility, True WYSIWYG
❏ Bidirectional parallel interface (ECP and Microsoft Peppy modes)
❏ Achieves high throughput with a very high-speed parallel interface. Maximum transmission speed isapproximately 2 MB/sec. (under ECP mode) or 600 KB/ sec. (under Peppy mode).
Figure 1-1 shows an exterior view of the EPL-5500W.
Figure 1-1. Exterior View of the EPL-5500W
EPL-5500W Service Manual General Description
Rev. A 1-1
Table 1-1 lists the optional units available for the EPL-5500W.
Table 1-1. Options for the EPL-5500W
Cat. No. Description Note
S050005 Developer cartridge Developer and toner cartridgeS051029 Photoconductor unit —
General Description EPL-5500W Service Manual
1-2 Rev. A
1.2 SPECIFICATIONS
This section provides statistical data for the EPL-5500W.
1.2.1 Basic Specifications
Printing method: Laser beam scanning and dry electrophotography
Resolution: 600/300 dpi
Printing speed: 6 ppm (letter/A4)
First printing time (A4/LT): Less than 20 seconds (face-up output)
Warm-up time: Less than 35 seconds(at rated current and 23° C (73° F) temperature)
Paper supply: See Table 1-2.
Table 1-2. Paper Feed Methods
Paper SupplyCapacity Using20 lb. (75 g/m 2)
PaperPaper Sizes Usage Thickness
(Ream Weight)
Standard built-in paper tray
150B5, A4, LT,EXEC, LGL
16 to 24 lb.(60 to 90 g/m2)
5 to 10Monarch,DL, C5, Env #10,11, 12, 14
Envelopes made of20 to 24 lb.(75 to 90 g/m2)paper
Manual feed slot 1Any size feedable(Note 2)
16 to 42 lb.(60 to 157 g/m2)
Notes:
1. The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17× 22 inches;1 g/m2 = 0.2659763 lb.
2. Paper size range: width 3 to 8.5 inches (76 to 216 mm)length 5 to 14.0 inches (127 to 356 mm)
Paper types: See Table 1-3.
Table 1-3. Paper Types
Standard paperXerox 4024 DP paper20 lb (75 g/m2)
Normal paper
Regular photocopier paperBond paperRecycled paper16 to 24 lb (60 to 90 g/m2)
Special papers
Card stock (90 to 157 g/m2)EnvelopesLabelsLetterheadTransparency (OHP) sheetsColored paper
EPL-5500W Service Manual General Description
Rev. A 1-3
Usability of special papers: See Table 1-4.
Table 1-4. Usability of Special Papers
Input OHP Envelopes Labels Card Stock Letterhead
Standard built-inpaper tray
P P P P R
Manual feed slot P P P P R
R: Reliable feeding and good image quality.P: Possible, but better avoided.N: Not supported.
Paper feed alignment and direction: Center alignment for all sizes
Paper ejection: Face down
Output tray capacity: 100 sheets (face down)
Printable area (standard paper): See Figure 1-2.
Note: The actual printable area depends on the printer mode.
Noise: Less than 35 dB(A), standbyLess than 47 dB(A), operating
Ozone density: Less than 0.01 ppm
Toxicity: No toxicity exists in organic photoconductor (OPC), toner, orplastic materials
Printable Area
4.0 mm
4.0 mm
4.0 mm4.0 mm
Figure 1-2. Printable Area
General Description EPL-5500W Service Manual
1-4 Rev. A
1.2.2 Electrical Specifications
Table 1-5. Electrical Requirements and Ranges
Description 100 V Version 200 V Version
Rated voltage 100 ∼ 120 VAC 220 ∼ 240 VACInput voltage range 90 ∼ 132 VAC 198 ∼ 264 VACRated frequency range 50 ∼ 60 HzInput frequency range 47 ∼ 63 HzPower consumption Less than 500 W Less than 600 WPower consumption whilein standby mode
Less than 15 W(without option)
1.2.3 Reliability Specifications
MPBF (Mean Prints Between Failures): Over 25,000 sheets
Note: MPBF indicates the average number of pages printed before an occurrence of a problem requiringreplacement or service.
MTBF (Mean Time Between Failures): 3000 power on hours (POH)Jam rate: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Feed failure: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Multiple paper feeds: 1 out of 500 sheets or lessPaper curl height: 30 mm (1.2 inches) or lessLeading edge bending (1 cm or more): 1 out of 1,000 sheetsMTTR (Mean Time To Repair): 30 minutes or lessDurability: 5 years or 1,800,000 sheets
1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)
Temperature: 10 to 35° C (50 to 95° F)
Humidity: 15 to 85% RH
Altitude: 2,500 m (8,200 feet) or lower
Levelness: 1°
Illuminance: 3,000 lux or less (Must not be exposed to direct sunlight.)
Surrounding space: Printer should have at least 100 mm (4") of clearance on its sidesand rear.
1.2.5 Environmental Conditions for Storage and Transportation
Temperature: 0 to 35° C (32 to 95° F)
Humidity: 30 to 85% RH
Drop test: Clear to JIS Z0200-1987 Level 1
Vibration: Vibration frequency 5 to 100 Hz and 100 to 5 HzAcceleration 1 GAcceleration direction 3 directions
Resistance to atmospheric pressure: More than 61.3 KPa
Storage life: 18 months (following date of manufacture)
EPL-5500W Service Manual General Description
Rev. A 1-5
1.2.6 Applicable Standards
Safety Standards
120 VAC model: UL 1950, CSA 22.2 No. 950 Deviation 3220/240 VAC model: EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950),
SEMKO (IEC950), DEMKO (IEC950)
Safety Regulations (Laser Radiation)
120 VAC model: FDA (NCDRH) Class 1220/240 VAC model: VDE 0837 (Laser Class 1) (IEC825), SETI (IEC825), SEMKO
(IEC825), DEMKO (IEC825)
EMI
120 VAC model: FCC Part 15 Subpart B Class B, DOC Class B220/240 VAC model: Vfg 243 (VDE 0878 Part 3,30)
EN55022 Class B (CISPR Pub. 22 Class B)CE marking, EMC
Others
Toner: No effect on human health (OSHA-TSCA, EINECS)OPC: No effect on human health (OSHA)Ozone: Less than 0.01 mmp
other UL478 (5th edition)Materials: SWISS environmental law (must contain no CdS)
1.2.7 Specifications for Consumables
Life: Developer and toner cartridge: 3,000 pagesPhotoconductor unit: 20,000 pages
Note: In continuous printing mode with A4/letter paper at a 5% image ratio (black/white ratio). The lifevaries, depending on the printing mode (continuous or intermittent) and/or the image ratio.
Environmental Conditions for Storage and Transportation
Temperature: 0 to 35° C (32 to 95° F)
Humidity: 30 to 85% RH
Drop test: Height 76 cm (30.4 inches)Vibration: Same as printerResistance to atmospheric pressure: More than 74 KpaStorage term: 18 months (following date of manufacture)
1.2.8 Physical Specifications
Dimensions (Width× Depth× Height):
Printer: 352× 264 × 299 mm (13.9× 10.4× 11.8 inches)Weight: Approx. 5 kg (11 lb), with consumables, excluding all options
General Description EPL-5500W Service Manual
1-6 Rev. A
1.2.9 Software Specifications
Built-in modes: Microsoft Windows Printing SystemPCL4 (software emulation)
EPL-5500W Service Manual General Description
Rev. A 1-7
1.3 INTERFACE SPECIFICATIONS
The EPL-5500W is equipped with the following external interfaces:
❏ Parallel interface
1.3.1 Parallel Interface
The parallel interface has the following two modes:
❏ ECP mode❏ Microsoft Peppy mode
Pin assignments: Fully IEEE-1284 compliant
Connector type: P90-25027-1 (Amphenol) receptacle
Applicable plug: 57-30360 (Amphenol or equivalent)
General Description EPL-5500W Service Manual
1-8 Rev. A
1.4 OPERATING INSTRUCTIONS
This section describes printer functions, including control panel operation and messages.
1.4.1 Control Panel
The printer control panel gives you easy control over most common printer operations. The panel consists ofthe indicator lights described below.
Indicator Lights
❏ GREEN light
ON: Printer is ready or idle.
Blinking: Printer is currently receiving data.
❏ RED light
ON: Printer has detected errors.
GREEN Light
RED Light
Figure 1-3. Control Panel
EPL-5500W Service Manual General Description
Rev. A 1-9
1.4.2 Display of Messages
This printer indicates two types of messages with the status message window for the printer driver on the PC.
1.4.2.1 Status Messages
This section describes the status messages.
Table 1-6. Status Messages
Message Status
Printer ready Printer is ready.
Printing Printer is printing.
Manual feed Printer is loading paper from manual feed slot.
Paused Printer is in pause mode.
Printing stopped Printer is stopping during printing of a job.
Please wait Printer is in the wait condition.
Paused printer warming up Printer is warming up.
Printer warming up Printer is warming up.
1.4.2.2 Error Messages
This section describes error messages, what they indicate, and what measures to take to eliminate the error.
Table 1-7. Error Messages
Message Status Measures
Configuration error
The user is unable to redirecta port, or system softwarecannot find a file to completea request.
Check the printer connectionport, and reinstall the driver.
Low memory Memory in PC has run out. Add the memory to the PC.
No local printerThe printer is not connectedto the local port when you areusing PCL emulation.
PCL emulation does notsupport a network.
Status not availableThe printer does not returnstatus information.
Check the printer connection.
Check printer/ cableThe printer does not returnstatus information.
Check the printer connection.
Service error Printer is damaged. Service required.
Clear paper jam A paper jam occurred.Open the cover and removethe jammed paper. Thenclose the cover.
General Description EPL-5500W Service Manual
1-10 Rev. A
Table 1-7. Error Messages (Continued)
Message Status Measures
Check Toner & CoverPrinter is cover open or notoner cartridge is installed.
Check the cover and tonercartridge.
Wrong paper loadedPaper in the tray to be fed intothe printer is different from thespecified paper size.
Check the paper size.
Change paper Paper settings are wrong. Check the paper size settings.
1.4.3 Printing Resolution Host PC Capability Dependency
This printer driver calculates the host PC’s capability every time Windows starts up, and the driver drops theprinting resolution at the beginning of each job automatically if the value it detects will not allow completeprinting at the resolution the user has set. This printer can print pages at the resolution if the HOST PC fulfillthe following conditions.
Table 1-8. Host PC Conditions
CPU
Installed DRAM Quantity
Windows 3.1, WFW 3.11 Windows 95
< 8 MB ≥ 8 MB < 8 MB ≥ 12 MB
80386SX16/20/25/33 MHzor compatibles
300 DPI(Note 1)
300 DPI(Note 1)
— —
80386DX16/20/25/33 MHzor compatibles
300 DPI(Note 1)
300 DPI(Note 1)
300 DPI(Note 1)
300 DPI(Note 1)
80486SX/DX16/20 MHzor compatibles
300/600 DPI(Note 2)
300/600 DPI(Note 2)
300/600 DPI(Note 2)
300/600 DPI(Note 2)
80486SX/DX25/33/50 MHz80486DX250/66 MHz80486DX475/100 MHzPentium60/66/75/90/100120/133 MHz
300/600 DPI(Note 2)
300/600 DPI300/600 DPI
(Note 2)300/600 DPI
Note 1: Some pages may be not be printed completely, depending on complexity of those pages.
Note 2: Some pages may not be printed at 600 DPI depending on complexity of those pages.
EPL-5500W Service Manual General Description
Rev. A 1-11
1.5 MAIN COMPONENTS
To simplify maintenance and repair, the main components of the EPL-5500W have been designed for easyremoval and replacement. The main components are:
❏ C180 MAIN Board Main board❏ PWB-E Board Power supply circuit board❏ PWB-F Board High-voltage supply circuit board❏ Optical Unit Printhead unit❏ Fusing Unit❏ Photoconductor unit❏ Developer cartridge❏ Housing
Optical Unit
C180 MAIN Board
PWB-E Board
PWB-F Board
Fusing Unit
Figure 1-4. Main Components
General Description EPL-5500W Service Manual
1-12 Rev. A
1.5.1 C180 MAIN Board
The C180 MAIN board contains a parallel interface controller and engine controller board. The primaryfunctions of this board are receiving print data from the host and sending the print image to the enginecontroller via the video interface.
❏ Memory chips
4M-bit DRAM (U4)
❏ Custom ICs
ASIC E05B23 (U6)
The engine controller consists of an M3807x 8-bit CPU, including a MASK ROM. It controls laser scanning(the polygon mirror drive motor), image synchronization, laser beam pulse width, and power.
M3807(IC201)
E05B23(U6)
4M DRAM(U4)
Figure 1-5. C180 MAIN Board
EPL-5500W Service Manual General Description
Rev. A 1-13
1.5.2 PWB-E Board
The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the ACline voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 Vtype and 220/240 V type. The difference between the two circuits is only in the input section.
CAUTION
Do not touch VR1 on PWB-E board. This volume is for factory setting only.
1.5.3 PWB-F Board
The PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drum chargebias, and image transfer bias.
CAUTION
Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.
F1
VR1
Figure 1-6. PWB-E Board
VR3
Figure 1-7. PWB-F Board
General Description EPL-5500W Service Manual
1-14 Rev. A
1.5.4 Optical Unit
The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) whichdrives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by thelaser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrorsand lenses, to create a latent electro-photographic image on the drum.
1.5.5 Fusing Unit
The fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp, thermistor,and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 V type. The onlydifference between them is the heater lamp.
Figure 1-8. Optical Unit
Figure 1-9. Fusing Unit
EPL-5500W Service Manual General Description
Rev. A 1-15
1.5.6 Photoconductor Unit
Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit.
1.5.7 Developing Cartridge
The developing mechanism for the printing process is integrated into this cartridge.
Figure 1-10. Photoconductor Unit
Figure 1-11. Developing Unit
General Description EPL-5500W Service Manual
1-16 Rev. A
Chapter 2 Operating Principles
Table of Contents
2.1 ENGINE OPERATION 2-12.1.1 Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.1.1.1 Paper Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.1.2 Drum Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.1.1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.4 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.5 Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.1.1.6 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.1.2 Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.1.2.1 Main Motor Functions and Control . . . . . . . . . . . . . . . . . . . . . . . . 2-82.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor. . . . . . . . . . . . . . . 2-92.1.2.3 Fuser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.1.2.4 Scanner Mirror Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112.1.2.5 Laser Diode Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-122.1.2.6 Bias Voltages and Laser Drive Timing . . . . . . . . . . . . . . . . . . . . 2-132.1.2.7 Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-152.1.2.8 Power Supply Circuit Function and Safety Protection. . . . . . . . . 2-15
2.2 PARALLEL INTERFACE CONTROLLER OPERATION 2-162.2.1 C180 MAIN Board Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
List of Figures
Figure 2-1. Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Figure 2-2. Print Process Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Figure 2-3. Paper Feeding from the Paper Feed Tray . . . . . . . . . . . . . . . . . . . . 2-3Figure 2-4. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Figure 2-5. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-6. Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-7. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-8. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-9. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . . 2-7Figure 2-10. Gear and Roller Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Figure 2-11. Main Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9Figure 2-13. Fuser Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10Figure 2-14. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10Figure 2-15. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11Figure 2-16. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-17. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-18. Laser Emission Power Adjustment Timing . . . . . . . . . . . . . . . . . . 2-12Figure 2-19. High-Voltage Supply Block Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-13Figure 2-20. Print Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-21. Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-22. Print Sequence (End) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-23. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-15Figure 2-24. Parallel Interface Controller Section . . . . . . . . . . . . . . . . . . . . . . . 2-16Figure 2-25. C180 MAIN Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2-16
List of Tables
Table 2-1. Functions of C180 MAIN Board Main Elements . . . . . . . . . . . . . . . 2-18
2.1 ENGINE OPERATION
This section describes the functions and operating principles of the EPL-5500W engine. Figure 2-1 shows thelocations and names of the main engine components.
1. Fan Motor (M3) 11. Paper Feeding Tray2. Lower Fusing Roller 12. Paper Lift-up Plate3. Paper Exit Sensor (PC3) 13. Paper Take-up Roller4. Upper Fusing Roller 14. Paper Transport Roller5. Heater Lamp (H1) 15. Paper Take-up Sensor (PC1)6. Paper Exit Roller 16. Pre-image Transfer Roller7. Print Tray 17. Electrode Comb8. Optical Unit 18. Drum Cartridge9. Toner Cartridge10. Manual Feed Guide
1
2
3
4 56
7
8
9
10
11
1213
14
15
16
17
18
Figure 2-1. Main Components
EPL-5500W Service Manual Operating Principles
Rev. A 2-1
2.1.1 Print Process
This section describes the print process from paper feeding to paper exit. Figure 2-2 shows a diagram of theprint process.
Optical Unit
Drum Cartridge
Toner Cartridge
Paper FeedingTray
Fusing
ImageTransfer
Print Exit
DrumCharge
TonerHopper
Develop-ment
Multi Feeding(150 sheets)
Manual Feed(1 sheet)
Exposure
Figure 2-2. Print Process Diagram
Operating Principles EPL-5500W Service Manual
2-2 Rev. A
2.1.1.1 Paper Feeding
Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot (1 sheet ata time). Paper fed by the paper take-up roller is transported to the transport roller, pre-image transfer roller,and then exit roller. After this, the paper is fed out onto the print tray. The starting position of an image isdecided by the paper take-up sensor (PC1). A photo sensor is used as the paper take-up sensor (PC1) and thepaper exit sensor (PC3).
Paper Feeding Tray (Standard Tray)
When the paper take-up solenoid is energized, the main motor (M1) drive is transmitted to the paper take-uproller via the paper take-up clutch (a one-way clutch) to rotate the paper take-up roller one revolution. At thesame time, the depression cam rotates and releases the paper lift-up plate to feed the top (first) paper. Thefixed separating pad is used for the paper separation system. It prevents the second or later sheets from beingfed together with the top paper.
Upper Fusing Roller Paper Exit Roller
LowerFusingRoller
PC Drum
Pre-Image TransferRoller
Paper Lift-Up Plate
Fixed SeparatingPad
Transport Roller
Paper Take-Up Sensor (PC1)
Paper Exit Sensor(PC3)
Paper Take-UpRoller
DepressionCam
Paper Take-Up Clutch
Paper Take-UpSolenoid (SL1)
When SL1 is de-energized
When SL1 is energized
Paper Lift-Up Plate Paper
Figure 2-3. Paper Feeding from the Paper Feed Tray
EPL-5500W Service Manual Operating Principles
Rev. A 2-3
2.1.1.2 Drum Charge
The PC drum is charged with static electricity before laser exposure. The rotating charge brush and pre-filmare used as the charging method. Less ozone is generated by the corona charge of the rotating charge brushand the pre-film, and the PC drum can be charged with low voltage because the charge is directly applied tothe PC drum. The charge brush is rotated by the drive of the M1 main motor via its gear.
Drum Cartridge
Rotating ChargeBrush
PC DrumProtectingShutter
PC Drum
Charged Surface:(approx. -800 V)
PC DrumProtectingShutter
Drum Chargingand Pre-fi lm Bias
PWB-FC180 MAIN
A
B Pre-film
A: Drum Charging BiasB: Drum Ground
IC201
Figure 2-4. Drum Charge
Operating Principles EPL-5500W Service Manual
2-4 Rev. A
2.1.1.3 Laser Exposure
The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan)sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scanline.
2.1.1.4 Development
Toner is applied to the invisible static image on the PC drum and a toner image is created on the surface.When the PC drum starts to rotate (when the main motor is activated), the PC drum surface remains 0 V atthe position between the rotating charge brush and sleeve roller. At this time, a specified positive voltage isapplied to the sleeve roller to prevent toner from being attracted back onto the PC drum (reverse biascontrol).
1. Toner hopper: Contains toner.2. Toner agitating screw:Stirs the toner in the hopper and sends the toner to the toner transport
roller.3. Toner transport roller: Transports the toner to the sleeve roller.4. Doctor blade: Spreads a thin, even coat of toner over the resin sleeve. The toner is
negatively charged by passing between this blade and resin sleeve.5. Sleeve roller: Rotates the resin sleeve.6. Resin sleeve: Carries the toner to the PC drum surface for development.7. Bias seal: Collects the toner remaining on the resin sleeve.8. PC drum: Is exposed to the laser to create an invisible image and rotates to carry
the developed image to the paper surface.
Charged Surface
Laser-Exposed Surface:(Approx. -50 V)
PWB-D
SOS Sensor
Reflector Mirror
Laser Diode
M2
CN210
CN205
C180 MAIN
IC201
1
5
1
7
Figure 2-5. Laser Exposure
2
4
3
Vs Terminal
VB TerminalVBL Terminal
VB (Developing Bias)
VBL (Toner Blade Bias)
Vs (Lower Seal Bias)
PWB-F
CN1F
CN204
C180 MAIN
IC201
1
8
1
8
Figure 2-6. Development
EPL-5500W Service Manual Operating Principles
Rev. A 2-5
2.1.1.5 Image Transfer
The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper.
2.1.1.6 Fusing
The toner image transferred onto the paper is fixed securely using a heat roller system as the fusing system.The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which is securely fixed bythe pressure between the upper and lower fusing rollers. Thermistor TH1 detects and controls the temperatureof the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C (392° F), shuttingdown power to the heater lamp.
Image Transfer Unit
Housing
Pre-Image Transfer Roller
Housing
Electrode Comb
Electrode Comb
Housing
Pre-Image TransferRoller
Housing Ground
Image Transfer Bias
PWB-F
CN1F
PWB-S
C180 MAIN
IC201
CN2041
8
1
8
1
8
1
8
Figure 2-7. Image Transfer
Lower Fusing Roller
Thermal Fuse
Thermistor
Upper FusingRoller
Heater Lamp
Paper
Figure 2-8. Fusing
Operating Principles EPL-5500W Service Manual
2-6 Rev. A
2.1.2 Engine Control
This section describes engine control, the power supply board, and the high-voltage supply board. Theengine is controlled by the main board (C180 MAIN board). Figure 2-9 shows the engine controllerconnection diagram.
C180 MAIN Board
MainMotor(M1)
PolygonMotor(M2)
FanMotor(M2)
ExitSensor(PC3)
PaperTake-upSensor(PC1)
PaperTake-upSolenoid(SL1)
FusingRollerThermistor(TH1)
PWB-SPWB-FHighVoltageUnit
Image TransferHousing
Image TransferCharger
PWB-DLaserDiodeDrive
PWB-EPowerUnit
Heater Lamp
Interlock Switch
Figure 2-9. Engine Controller Connection Diagram
EPL-5500W Service Manual Operating Principles
Rev. A 2-7
2.1.2.1 Main Motor Functions and Control
The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit (lowercassette) via each gear, as shown below.
Toner Cartridge
Sleeve Roller A
Paper Exit Roller
Upper Fusing RollerLower FusingRoller
PC Drum
Pre-image TransferRoller
Main Motor (M1)
Optional Second Paper Feeding Unit
Paper Take-Up Roller
Paper Transport Roller
A
Figure 2-10. Gear and Roller Positions
Operating Principles EPL-5500W Service Manual
2-8 Rev. A
Figure 2-11 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor,controlled by the CPU (IC201) on the main board (C180 MAIN). This board has a stepping motor driver ICthat drives the M1 main motor with a constant current.
2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor
The paper take-up sensor has three functions:1. To detect the top edge of paper. The engine starts printing when the detection signal
is received.2. To detect paper size. The printer detects the time it takes for paper to pass the paper
take-up sensor during paper feeding. If this time is long, longer paper is feeding;if the time is short, shorter paper is feeding.
3. To detect paper jams and feed jams.
If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam or no paper. Afeed jam is a paper jam that occurs in the feed process.
If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jam thatoccurs in the printing process area.
The paper take-up sensor (PC1) or the paper exit sensor (PC3) is on at power on or when the upper caseis closed.
The paper take-up sensor (PC1) or the paper exit sensor (PC3) is not turned on or off within thespecified time. (Refer to the following timing chart.)
A
B
CN206
4321
M1 Main Motor
BoardC180 MAIN
B
A
Figure 2-11. Main Motor Drive Circuit
2.0 11.0
Take Up Solenoid ON
3.5-4.5 3.4-4.7
[seconds]
PC1(CN203-3)
PC3(CN208-3)
Figure 2-12. Paper Take-Up Sensor and Paper Exit SensorOn/Off Timing
EPL-5500W Service Manual Operating Principles
Rev. A 2-9
2.1.2.3 Fuser Control
The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives aFUSERsignal from the main board (C180 MAIN), the power supply board (PWB-E) supplies the AC voltage to theheater lamp. This AC voltage is cut by an interlock switch when the case is open.
Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage tothe 77-pin chip, IC201. Based on this temperature data, the heater lamp on/off signal (theFUSER signal) isoutput from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off to control the fusingtemperature. When the heater lamp is not turned off even if the thermistor detects a high temperaturemalfunction (which occurs if the surface temperature of the upper fusing roller exceeds 200º C), the signalfrom the 75-pin chip, IC201, changes from H to L to turn off the heater lamp forcibly.
The following figure shows the fuser temperature control procedure.
1. Warm up: After printer initialization, printer warm up starts, and the heater lamp turns on untilthe upper fusing roller’s temperature reaches approximately 172º C (342º F).
2. Standby: In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C(313º F). When this condition continues for 3 minutes, the printer goes into standbymode at low temperature.
3. Print cycle: When the printer receives the printing command from the controller, the upperfusing roller is controlled to maintain 172º C (342º F).
4. Standby at low temperature: The upper fusing roller is controlled to maintain 112º C (234º F).
C180 MAIN
IC201
77
54
75
Analog Voltage Detected by theThermistor (TH1)
5 VDC
L
H
IC202B56
4
L
H
H H
23
1IC202A
4 3
L
L H1:ONH H1:OFF
12
1
5
1
5
TH1
Thermistor
PWB-E 123
H1
TF1
Heater Lamp
Thermal Fuse
Heater LampON/OFF Signal
CN202
CN207
CN1E
CN3E
Figure 2-13. Fuser Control Circuit
Temperature (Degrees C)
172
156
112
Power On
Warm up Standby Standby with LowTemperature
Time
When a print is made immediately after warm up
Figure 2-14. Temperature for Fuser Control Procedure
Operating Principles EPL-5500W Service Manual
2-10 Rev. A
If any of the following conditions are detected, the printer indicates a fuser error:
1. If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec.after warm up. (This error applies only when the thermistor detects a temperature of 90º C (194º F)or less.)
2. If the thermistor detects that the temperature has not reached 172º C (342º F) within 60 sec. afterwarm up.
3. Except in pause mode (see the note below), if the thermistor detects that the temperature in theidle state has fallen to 80º C (176º F) or lower for 50 msec., or the temperature during printing hasfallen to 133º C (271º F) or lower.
4. The thermistor detects that the temperature has exceeded 193º C (379º F) for 50 msec. duringtemperature control.
Note: In Pause Mode, the control temperature is decreased to save power in the idle state, theheater lamp is turned OFF.
Thermo fuse TF1 cuts power if the temperature of the fusing section rises to an abnormally high level (over200° C, 392° F).
2.1.2.4 Scanner Motor Control
Figure 2-16 is the scanner motor (M2) control circuit. The scanner motor is driven while it receives thePOLYGON CTL signal. Motor rotation speed is 8622 rpm.
If the any of following conditions are detected, the printer indicates a scanner motor error:
1. The SSCAN signal has not been given once within 1 sec. after the scanner motor is energized.2. The number of scanner motor rotations has not stabilized within± 0.5 rpm by 4.2 sec. after the
motor is energized.3. The number of scanner motor rotations has exceeded± 3% for more than 0.5 sec. after the motor
is energized, even if the rotation number stabilizes within± 0.5 rpm.
+24VGND2
54321CN210
C180 MAIN BoardM2 Scanner Motor
NC
+5VP_CTL
Figure 2-15. Scanner Motor Control Circuit
EPL-5500W Service Manual Operating Principles
Rev. A 2-11
2.1.2.5 Laser Diode Drive
Figure 2-16 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA,LDAPC1, and LDAPC2) from the main board (C180 MAIN).
The LDATA signal is the laser on/off signal. When it is LOW, the laser emits, and when it is HIGH, thelaser stops emitting.LDATA is the combination of the two signals in the figure below. If theVIDEO or theFORCED LASER DIODE ON signal is activated (LOW), theLDATA signal will be active. TheVIDEOsignal is an image signal sent from the video controller circuit. The FORCED LASER DIODE ON signal isa laser emission signal to apply the laser beam to the SOS sensor.
The laser diode is forcibly activated after scanner motor M2 turns on. At this time, laser emission power isadjusted. LDAPC1 and LDAPC2 are the laser emission power adjust signals; they are analog signals.LDAPC1 is a tuning, and LDAPC2 is a fine tuning signal.
If either of the following conditions is detected, the printer indicates a laser error:
The LDAPC1 signal or LDAPC2 signal has been out of the specified range while laser power is adjusted.
SSCANLD_CTL
LDAPC1LDAPC2
L DATA
C180 MAIN Board
LDSOS(PWB-D)
Laser Diode
SOS Sensor
SOS Mirror
Figure 2-16. Laser Diode Drive Circuit
L DATA
Forced Laser Diode ON
VIDE Ofrom the VideoController Circuit(C180 MAIN)
Figure 2-17. LDATA Generation Circuit
Scanner Motor On
LDATA
LDAPC1
LDAPC2
P_CTL
Figure 2-18. Laser Emission Power Adjustment Timing
Operating Principles EPL-5500W Service Manual
2-12 Rev. A
2.1.2.6 Bias Voltages and Laser Drive Timing
Figure 2-19 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developingbias voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltagesupply board (PWB-F). If the printer detects a case-open condition, the interlock switch is set to off, whichcuts the +24 VDC, which, in turn, cuts the bias voltages.
These bias voltages are controlled by the main board (C180 MAIN). TheHV-T signal is the image transferbias voltage control. While this signal is LOW, the image transfer electrode comb is charged to from +3 to+6K VDC by the high-voltage supply circuit.HV SEL1 andHV SEL2 are image transfer bias level controlsignals.
The HVB signal is the digital signal for developing bias voltage control. This signal controls the bias on/off.The BIAS MON signal controls the bias voltage level (–300 V to –375K VDC) using pulse data. The imagedensity is controlled by the developing bias voltage level.
+24 VDC
InterlockSW
Power SupplyBoard(PWB-E)
+24 VDC
HV-C
HV-THV SEL1
Image TransferBias 3K to 6 K VDC
DevelopingBias-270 to -370 VDC
Drum Charge-2.0 K VDC
MainBoard(C180 MAIN)
High Voltage SupplyBoard(PWB-F)
Toner Doctor BladeBias -500 VDC
HV SEL2HV B
BIAS MON
Seal Bias -250 VDC
PWB-S
Figure 2-19. High-Voltage Supply Block Diagram
EPL-5500W Service Manual Operating Principles
Rev. A 2-13
Figure 2-20 shows the print process.
Figure 2-21 shows the start print sequence. The printer’s engine starts printing when it receives thePRINTsignal from the video controller circuit.
Figure 2-22 is the end of the print sequence.
Brush Roller Charging
Laser Exposure
PC Drum
Image Transfer
Development
Figure 2-20. Print Process
[m sec.]
PrintCommand
Polygon Motor(M3)
Paper Take-upSensor (PC1)
Paper Take-upSolenoid(SL1/2)
Main Motor(M1)
Drum Charge
LaserExposure
Development
ImageTransfer
20
200
500300
2310
150
500
260
1st:770, 2nd:2820
1st: 790 to 13002nd: 2670 to 3080
480
1st: 15102nd: 1680
Normal M3 Rotation
4000
Figure 2-21. Print Sequence (Start)
[m sec.]
Polygon Motor(M3)
Main Motor(M1)
Drum Charge
LaserExposure
Development
ImageTransfer
Paper ExitSensor (PC3) 5160
850
480
Figure 2-22. Print Sequence (End)
Operating Principles EPL-5500W Service Manual
2-14 Rev. A
2.1.2.7 Fan Motor Control
The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates duringprinting. When printing ends, the fan motor stops after 3 min.
If the following condition is detected, the printer indicates a laser error:
The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.
2.1.2.8 Power Supply Circuit Function and Safety Protection
The printer’s power supply board (PWB-E) supplies the +5 VDC and +24 VDC. The +24 VDC is used asthe bias voltage supply, main motor (M1) drive, scanner motor (M2) drive, fan motor (M3) drive, andsolenoid drive. For safety protection, the +24 VDC line is cut when the interlock switch (case open switch)is off.
AC IN
InterlockSW
+24 VDC
+5 VDC
FG
SG
Power Supply Board(PWB-E)
Figure 2-23. Power Supply Circuit Block Diagram
EPL-5500W Service Manual Operating Principles
Rev. A 2-15
2.2 PARALLEL INTERFACE CONTROLLER OPERATION
The parallel interface controller section converts from a bidirectional parallel interface to a video interface.The parallel interface controller section is in the C180 MAIN board.
2.2.1 C180 MAIN Board Operation
Figure 2-25 shows a block diagram of parallel interface controller section of the C180 MAIN board.
C180 MAIN Board
Parallel Interface Controller Section
Engine Controller Section
Figure 2-24. Parallel Interface Controller Section
E05B23(U8)
4M DRAM(U4)
BidirectionalParallel I/F
Engine ControllerSection
Figure 2-25. C180 MAIN Board Block Diagram
Operating Principles EPL-5500W Service Manual
2-16 Rev. A
Table 2-1 lists the functions of the main elements of the video controller section in the C180 MAIN board.
Table 2-1. Functions of C180 MAIN Board Main Elements
Element Location Function
E05B23 ASIC U8This ASIC contains the following functions:
Changing from parallel I/F to video I/F.DRAM management (refresh control, RAS/CAS control).
DRAM U4 These DRAMs are used as the working area of the E05B23.
EPL-5500W Service Manual Operating Principles
Rev. A 2-17
Chapter 3 Disassembly and Assembly
Table of Contents
3.1 GENERAL INFORMATION 3-13.1.1 Precautions for Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.2 DISASSEMBLY AND ASSEMBLY 3-43.2.1 Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.1.1 Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.2.2 Removal of the Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.2.1 Main Board (C180 MAIN Board) Removal . . . . . . . . . . . . . . . . . . 3-53.2.3 Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.2.3.1 Optical Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.2.3.2 Image Transfer Roller Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.2.3.3 Upper Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.2.3.4 High-Voltage Supply Board (PWB-F) Removal . . . . . . . . . . . . . . 3-103.2.3.5 Power Supply Unit (PWB-E) Removal. . . . . . . . . . . . . . . . . . . . . 3-113.2.3.6 Fusing Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.2.3.7 Fusing Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
List of Figures
Figure 3-1. Removing the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Figure 3-2. Removing the Shield Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-3. Removing the C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-4. Removing the Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6Figure 3-5. Removing the Image Transfer Unit -1. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-6. Removing the Image Transfer Unit -2. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-7. Moving the Image Transfer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-8. Reinstalling the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-9. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-10. Removing the Upper Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-11. Removing the PWB-F Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-12. Removing the PWB-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-13. Removing the PWB-E Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-14. Removing the PWB-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-15. Gear and Spring Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-16. Removing the Fusing Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-17. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-18. Removing the Fusing Entrance Guide . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-19. Removing the Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-20. Roller Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-21. Removing the Heater Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15Figure 3-22. Removing the Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16Figure 3-23. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16Figure 3-24. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-25. Paper Exit Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-26. Removing the G-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Figure 3-27. Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-18Figure 3-28. Removing the Lower Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-19Figure 3-29. Removing the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
List of Tables
Table 3-1. Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Table 3-2. Abbreviations Used for Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Table 3-3. Screw Types and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Table 3-4. Checks after Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.1 GENERAL INFORMATION
This chapter describes disassembly/assembly procedures to use to replace the main assemblies of theEPL-5500W.
3.1.1 Precautions for Disassembly/Assembly
Follow the precautions below when disassembling/assembling the printer.
WARNING
❒ Disconnect the power cord before disassembling/assembling the printer.❒ Be sure to handle the fusing unit carefully, because the unit remains hot for a while afterthe printer stops printing.❒ If it is necessary to plug in the power cord and operate the printer after disassembling it,please be careful of the following:1.Keep your hands and clothing well away from operating or rotating parts (such asrollers, fan motors, etc.).2.Never touch electric terminals or high-voltage components (such as the charger and thehigh-voltage unit).
CAUTION
❒ Do not disassemble the photoconductor unit and toner cartridge.❒ If the photoconductor unit is removed from the printer, do not place it in direct sunlight.❒ Do not disassemble the optical unit.❒ Never turn power on if the optical unit is not installed.❒ To prevent damage to ICs from static electricity, do not touch the ICs on the circuitboard or the terminals of peripheral electrical components with your hands.❒ Use only the recommended tools to ensure safe and efficient maintenance work.Inappropriate tools may damage the machine.❒ Never open the upper unit until the main motor stops completely. Otherwise, the gearsmay be damaged.❒ When transporting the printer, remove the photoconductor unit and toner cartridge fromthe printer.❒ When transporting the printer a long distance, pack up the printer using the originalpacking material.
3.1.2 Tools
Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.
Table 3-1. Tools
Name Commercially Available? Part No.
Philips screwdriver no. 2 Yes B743800200Regular screwdriver Yes B743000100Tweezers Yes B641000100Soldering iron Yes B740200100Round-nose pliers Yes B740400100
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-1
3.1.3 Small Parts
In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and3-3 list these abbreviations.
Table 3-2. Abbreviations Used for Screws
Abbreviation Part Name
CP Cross-recessed Pan headCC Cross-recessed Cup headCP(O) Cross-recessed Pan head with Outside-toothed lock washerCP(S)(P1) Cross-recessed Pan head with Spring lock washer and 1 Plain washerCCB Cross-recessed Cup head BindSCB Slotted Cross-recessed B-tightSCB(S)(P1) Slotted Cross-recessed Bind with Spring washer and 1 Plain washer
Table 3-3. Screw Types and Abbreviations
HeadBody Washer
(Assembled)Top Side
1.Cross-recessedhead
2.Slotted Cross-recessed head
1.Bind
2.Pan
3.Cup
1.Normal
—————-
2. B-tight
1.Plain washer 1
2.Outside-toothedlock washer
3.Spring washer
Disassembly and Assembly EPL-5500W Service Manual
3-2 Rev. A
3.1.4 Service Checks after Repair
Check the repaired unit using the following list on completion of servicing.
Table 3-4. Checks after Repair
Item Location Checkpoint Check
Operation
Control panel Do all LEDs and buttons function normally?Heater lamp Does the heater lamp turn on normally?Test Page Is the test page printed normally?Data print Does data print in all modes?
Adjustments Print positionIs the gap between the top edge of the paper andthe horizontal line in the adjustment printing sheetprint exactly 4.2 mm (0.17 inch).
Cleaning
Is toner and dust removed from the paper path?Is the paper take-up roller cleaned?Is the roller in the fusing unit cleaned?Is the outer surface of the printer clean?
PackingAre the consumables removed from the printer?Is the unit packed securely?Are accessories packed also?
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-3
3.2 DISASSEMBLY AND ASSEMBLY
This section describes and illustrates procedures for removing and disassembling components of theEPL-5500W. Cleaning is described in Chapter 6. The assembly procedures are not described, except forspecial notes where necessary, because assembly can be accomplished by performing disassembly in reverse.
3.2.1 Housing Removal
This section describes how to remove the cases and the rear frame.
3.2.1.1 Case Removal
1. Push the upper unit lock release button, and open the upper unit.
2. Remove each cover in the following order.
ASSEMBLY POINT
When reinstalling each cover, securely insert the protrusions for the cover into the cutouts in theprinter frame.
2. Front Cover
1. Left cover
3. OperationCover
4. Rear Cover
Upper unit
Upper unit lockrelease button
Figure 3-1. Removing the Housing
Disassembly and Assembly EPL-5500W Service Manual
3-4 Rev. A
3.2.2 Removal of the Controller Section
The control section is comprised of the controller board (the C180 MAIN board).
3.2.1.1 Main Board (C180 MAIN Board) Removal
1. Turn the printer so that its right side faces you.
2. Remove the right cover.
3. Remove 2 screws, and then remove the shield case.
4. Disconnect all connectors on the C180 MAIN board.
5. Remove the 5 screws for the C180 MAIN board.
6. Remove the C180 MAIN board.
Figure 3-2. Removing the Shield Case
Figure 3-3. Removing the C180 MAIN Board
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-5
3.2.3 Disassembling the Engine
This section describes disassembling the engine, including the high-voltage unit (PWB-F) and power supplyboard (PWB-E).
3.2.3.1 Optical Unit Removal
CAUTION
❒ Do not touch the optical unit, except during replacement.❒ Do not open the unit under any conditions.❒ Do not remove the circuit board from the optical unit under any conditions.
1. Open the top cover.
2. Remove the right cover, left cover, and front cover. (Refer to Section 3.2.1.1.)
3. Remove the cover shield plate.
4. Disconnect connectors CN205 and CN210 from the C180 MAIN board.
4. Remove the 6 screws from the optical unit.
5. Remove the optical unit.
Figure 3-4. Removing the Optical Unit
Disassembly and Assembly EPL-5500W Service Manual
3-6 Rev. A
3.2.3.2 Image Transfer Unit Removal
1. Open the top cover.
2. Remove harness cover A. (Refer to Section 3.2.3.3.)
3. Remove the 2 screws and holders at both ends of the image transfer unit.
4. Disconnect the 2 connectors and remove the unit.
Figure 3-5. Removing the Image Transfer Unit - 1
Figure 3-6. Removing the Image Transfer Unit - 2
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-7
ASSEMBLY POINT
After reinstalling the image transfer unit, check that the unit smoothly moves up and down.
5. Remove the electrode comb.
ASSEMBLY POINT
When reinstalling the electrode comb, be careful of the direction of installation. Install theelectrode comb so that the comb terminal faces the image transfer roller drive gear.
Figure 3-7. Moving the Image Transfer Unit
Figure 3-8. Reinstalling the Electrode Comb
Disassembly and Assembly EPL-5500W Service Manual
3-8 Rev. A
3.2.3.3 Upper Unit Removal
1. Open the upper unit.
2. Remove the right cover and left cover. (Refer to Section 3.2.1.1.)
3. Disconnect connectors CN202, CN208, and CN211 from the C180 MAIN.
4. Remove harness covers A and B, and pull CN1 out from the PWB-E board.
5. Remove the image transfer unit. (Refer to Section 3.2.3.2.)
6. Slide and remove the unit as shown in the illustration.
A
B
Figure 3-9. Removing the Harness Cover
Figure 3-10. Removing the Upper Unit
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-9
3.2.3.4 High-Voltage Supply Board (PWB-F) Removal
1. Open the top cover.
2. Remove 1 screw from the PWB-F cover.
3. Remove the PWB-F cover.
4. Remove the 4 screws from the PWB-F board.
5. Disconnect 2 connectors.
6. Remove the PWB-F board.
Figure 3-11. Removing the PWB-F Cover
Figure 3-12. Removing the PWB-F
Disassembly and Assembly EPL-5500W Service Manual
3-10 Rev. A
3.2.3.5 Power Supply Unit (PWB-E) Removal
1. Remove the upper unit. (Refer to Section 3.2.3.3.)
2. Remove 6 screws, and remove the PWB-E cover.
3. Disconnect connector CN207 from the C180 MAIN board.
4. Remove 4 screws and 2 screws, and then remove the PWB-E.
Figure 3-13. Removing the PWB-E Cover
Figure 3-14. Removing the PWB-E
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-11
3.2.3.6 Fusing Unit Removal
1. Open the top cover. (Refer to Section 3.2.3.3.)
2. Remove the image transfer unit. (Refer to Section 3.2.3.2.)
3. Remove 1 screw, and remove the drive tension section of the fusing unit.
4. Remove the transport gear.
5. Release the hook for the spring and remove the drive gear section of the fusing unit.
ASSEMBLY POINT
When rehooking the spring, be sure to hook it in the correct position.
6. Remove 2 screws, and remove the fusing guide plate.
drive gear sectionof the Fusing unit
drive transportgear
hook of thespring
drive tension sectionof the Fusing unit
Figure 3-15. Gear and Spring Position
Figure 3-16. Removing the Fusing Guide Plate
Disassembly and Assembly EPL-5500W Service Manual
3-12 Rev. A
7. Remove the harness cover.
8. Remove the fusing entrance guide.
Figure 3-17. Removing the Harness Cover
Figure 3-18. Removing the Fusing Entrance Guide
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-13
10. Remove 4 screws, and remove the fusing unit.
ASSEMBLY POINT
After reinstalling the fusing unit, check the direction of the bushings on the paper exit roller andthe connection between the roller and the ground plate.
Figure 3-19. Removing the Fusing Unit
Figure 3-20. Roller Position
Disassembly and Assembly EPL-5500W Service Manual
3-14 Rev. A
3.2.3.7 Fusing Unit Disassembly
This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, and upper fusingroller.
Heater Lamp
CAUTION
Do not touch the glass surface of the lamp with your bare hands.
1. Remove the fusing guide plate. (Refer to Section 3.2.3.8.)
2. Pull the heater lamp out of the lamp holder from the front side.
ASSEMBLY POINT
When reinstalling the lamp, position its voltage indicator to the left side (non-gear end.).
Figure 3-21. Removing the Heater Lamp
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-15
Thermistor
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the 1 screw, and remove the thermistor.
ASSEMBLY POINT
When reinstalling the thermistor, wire the harness as shown below.
Figure 3-22. Removing the Thermistor
Figure 3-23. Wiring
Disassembly and Assembly EPL-5500W Service Manual
3-16 Rev. A
Paper Separator
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Release the lock of the holder, and remove the 3 paper separators.
ASSEMBLY POINT
When reinstalling the paper separators, be careful of their positions, because the middle onediffers from the others.
Paper Exit Sensor
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the paper exit sensor.
Figure 3-24. Removing the Paper Separators
Figure 3-25. Paper Exit Sensor
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-17
Fusing Roller
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove the 2 G-rings from the fusing unit.
CAUTION
When reinstalling the G-rings:❒ Be careful of the direction.❒ Securely position them into the grooves of the fusing roller.
3. Remove the upper fusing roller drive gear.
4. Remove the upper fusing roller.
Figure 3-26. Removing the G-Rings
Figure 3-27. Removing the Upper Fusing Roller
Disassembly and Assembly EPL-5500W Service Manual
3-18 Rev. A
5. Take out the lower fusing roller.
Thermal Fuse
1. Remove the fusing unit. (Refer to Section 3.2.3.6.)
2. Remove 2 screws, and remove the thermal fuse.
Figure 3-28. Removing the Lower Fusing Roller
Figure 3-29. Removing the Thermal Fuse
EPL-5500W Service Manual Disassembly and Assembly
Rev. A 3-19
Chapter 4 Adjustment
Table of Contents
4.1 ADJUSTMENT 4-14.1.1 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
List of Figures
Figure 4-1. Print Position Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-ii Rev. A
4.1 ADJUSTMENTS
This section describes the adjustment procedures for the EPL-5500W. You must perform these adjustmentsafter servicing the printer, especially when any component or part is replaced.
4.1.1 Print Position Adjustment
You can adjust the vertical print position on a sheet of paper by turning the image synchronizing volumecontrol on the main board (C180 MAIN). After replacing a main board, be sure to adjust the print positionusing the procedure below.
1. Connect the EPL-5500W to LPT1 port of PC. And set the A4 size paper.
2. Install the EPL-5500W printer driver.
3. Set paper size to A4 setting byPCL Emulation Front Panel window.
4. Copy the adjustment printing data filelj4a4.bin to c:\ drive.
5. Open theDOS Prompt window.
7. Type thecopy /b lj4a4.bin lpt1: , and thenEnter . Printer print adjustment printing sheet.
8. Check that the registration gap between the leading edge of the sheet and the horizontal line printed onthe page is within the following range:
4.2± 2.5 mm (0.17± 0.1 inches) for a adjustment printing sheet on A4 paper:If the gap is not correct, adjust the print position as described in the next few steps.
9. Turn printer power off.
10. Open the right cover and shield plate. (See Chapter 3.)
11. Adjust the image synchronizing adjustment volume (VR1) on the main board (C180 MAIN) so that thegap for the print position of the horizontal line (down from the top edge of the sheet) becomes 4.2 mm(0.17 inches) .
Turn VR1 clockwise to increase the gap for the print position of the horizontal line.Turn VR1 counterclockwise to decrease the gap.
12. Turn on the printer.
13. Print a adjustment printing sheet again (Step 7) to check the print position.
14. Repeat steps 8 to 13 until the print position is 4.2 mm (0.17 inches).
15. Reattach the shield plate and right case.
4.2 mmLeading Edge
Figure 4-1. Print Position Adjustment
EPL-5500W Service Manual Adjustments
Rev. A 4-1
Chapter 5 Troubleshooting
Table of Contents
5.1 OVERVIEW 5-1
5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL 5-1
5.3 TROUBLESHOOTING 5-35.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35.3.2 Print Quality Anomaly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
List of Tables
Table 5-1. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Table 5-2. Symptoms and Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Table 5-3. The Printer Does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-4. Both LED Lights Do Not Come On. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-5. Clear Paper Jam (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-6. Clear Paper Jam (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Table 5-7. Check Toner & Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Table 5-8. Service Error (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Table 5-9. Service Error (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-10. Service Error (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-11. Service Error (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-12. Print Quality Anomalies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.1 OVERVIEW
The EPL-5500W has a sophisticated, built-in, self-diagnostic function that reduces troubleshooting time byidentifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems forpage printers, in which even a trivial failure can result in a serious print quality problem.
5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL
This section describes the self-diagnostic function, in which the controller automatically checks the operatingconditions of each component. If any abnormality is detected, the printer driver displays a message in thestatus window.
If an engine error is detected, the printer driver displays a “SERVICE CALL” message. This error messagedoes not display error information details. To isolate the problem more, you must read the engine error statusregister of the printer using a special tool. This tool is program for Windows 3.1.
The procedure for using the program is as follows:
1. Connect the EPL-5500W to the PC’s LPT1 port, and power the printer on.
2. Start Windows 3.1.
3. If you are using the EPL-5500W printer driver, you must change it so that it does not direct output to aprinter. (If you are not using the EPL-5500W printer driver, skip to step 9.)
CAUTION
The tool program cannot run if EPL-5500W printer driver output is directed a printer port inWindows 3.1, because the EPL-5500W printer driver and special tool both use an interfaceprotocol program. The interface protocol program for the special tool cannot be active in Windows3.1 while the interface protocol for the EPL-5500W printer driver is active.
4. Open theMain window in Windows 3.1.
5. Open thePrinters window.
6. SelectEPL-5500W.
7. Click theConnect button to change thePorts: selection in theConnect menu fromLPT1: or LPT2:to FILE:.
8. Select another printer under theInstalled Printers: list, and then click theSet As Default Printerbutton.
9. Run the SLEEKDBG.EXE file for the special tool from the Program Manager. Windows 3.1 opens theCimarosa Debug Tool window.
10. Set thePort to LPT1 in theCimarosa Debug Tool window.
11. Click the Read / Write Register button in theCimarosa Debug Tool window. The SelectProtocol Cimarosa window is opened.
12. Set the protocol toPeppy .
13. Type000D in theAddress box and04 in theData write box. Then click theWrite button.
14. Type000E in the Address box. And then click theRead button. TheData read box displays theerror code.
The error codes are shown in Table 5-1 on the next page.
EPL-5500W Service Manual Troubleshooting
Rev. A 5-1
Table 5-1. Error Codes
Error Code Error Condition
0x02 Fan motor error0x10 Scanner mirror motor error0x13 Scanner mirror motor and fan motor error0x20 Laser light error0x23 Laser light and fan motor error0x31 Laser light and scanner mirror motor error0x40 Fusing unit error0x43 Fusing unit and fan motor error0x51 Fusing unit and scanner mirror motor error0x52 Fusing unit, scanner mirror motor, and fan motor error0x61 Fusing unit and laser light error0x62 Fusing unit, laser light, and fan motor error0x70 Fusing unit, laser light, and scanner mirror motor error0x73 Fusing unit, laser light, scanner mirror motor, and fan motor error
Troubleshooting EPL-5500W Service Manual
5-2 Rev. A
5.3 TROUBLESHOOTING
This section describes troubleshooting abnormal operations and print quality problems.
5.3.1 Troubleshooting of Abnormal Operations
This section describes how to detect malfunctions, and determine their cause, and it suggests what actions totake for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table.
Table 5-2. Symptoms and Reference Tables
Symptom Printer Condition ReferenceTable
The printer does not operate at all.The heater lamp in fusing unit does not come on,and so neither LED light is on.
5-3
“Status not available” or “Checkprinter / cable” is displayed.
“Status not available” or “Check printer / cable”is displayed by the printer driver interface.
5-4
“Clear paper jam” is displayed.
“Clear paper jam” is displayed by the printerdriver interface during power on.
5-5
“Clear paper jam” is displayed by the printerdriver interface during printing.
5-6
“Check Toner & Cover” isdisplayed.
“Check Toner & Cover” is displayed by theprinter driver interface.
5-7
“Service Call” is displayed.
A fusing unit error is detected.(Refer to Section 5.2)
5-8
A fan motor error is detected.(Refer to Section 5.2)
5-9
A scanner motor error is detected.(Refer to Section 5.2)
5-10
A laser light error is detected.(Refer to Section 5.2)
5-11
EPL-5500W Service Manual Troubleshooting
Rev. A 5-3
Table 5-3. The Printer Does Not Operate at All
Cause Step Checkpoint Finding Solution
Connector CN207 on theC180 MAIN board may bedisconnected.
1Is connector CN207 on theC180 MAIN boarddisconnected?
YesConnect CN207on the board.
The fuse on the PWB-Eboard may be blown.
2Has the fuse blown on thePWB-E board?
Yes Replace the fuse.
PWB-E board may be dead. 3
With power on, is there anoutput of +5 VDC between pin4 (+) and pin 3 (–) for CN207on C180 MAIN board?
NoReplace thePWB-E board.
C180 MAIN board may bedead.
4 — —Replace the C180MAIN board.
Table 5-4. Both LED Lights Do Not Come On
Cause Step Checkpoint Finding Solution
The C180 MAIN board maybe dead.
1If you replace the C180 MAINboard, do the LEDs come on?
YesReplace the C180MAIN board.
Table 5-5. Clear Paper Jam (1)
Cause Step Checkpoint Finding Solution
The paper take-up sensorflag position may beincorrect.
1Is the paper take-up sensorflag position OK?
NoReposition thepaper take-upsensor flag.
The paper exit sensor flagposition may be incorrect.
2Is the paper exit sensor flagposition OK?
NoReposition thepaper exit sensorflag.
The paper take-up sensorconnector may bedisconnected.
3Is the paper take-up sensorconnector disconnected?
Yes Connect it.
The paper exit sensorconnector may bedisconnected.
4Is the paper exit sensorconnector disconnected?
Yes Connect it.
The paper exit sensor maybe bad.
5 — — Replace it.
The paper take-up sensormay be bad.
6 — — Replace it.
Troubleshooting EPL-5500W Service Manual
5-4 Rev. A
Table 5-6. Clear Paper Jam (2)
Cause Step Checkpoint Finding Solution
The paper take-upsolenoid coils may beopen or shorted.
1
Disconnect CN203 on theC180 MAIN board, and checkthe coil resistance betweenpins 5 and 6 on thedisconnected cable side of theconnector using a multimeter.Is the resistanceapproximately 80 ohms?
NoReplace the papertake-up solenoid.
If the coil is shorted, check thesolenoid drive circuit using theprocedure below:1. Set the multimeter to
voltage.2. Place the (–) terminal of
the multimeter on pin 5of connector CN207 onthe C180 MAIN board.
3. Place the (+) terminal ofthe multimeter on pin 6(GND).
With power on, does themultimeter detect any current?
Yes
Replace the papertake-up solenoidand the C180 MAINboard.
The main motor coilsmay be open or shorted.
2
Disconnect CN206 on theC180 MAIN board, and checkthe coil resistance betweenpins 1 and 2 and between pins3 and 4 (2 points total) on thedisconnected cable side of theconnector using a multimeter.
Pin 1 — Pin 2Pin 3 — Pin 4
Are the resistances of all fourpoints approximately 10 ohms?
NoReplace the mainmotor.
3
If any coil is shorted, check themain motor drive circuit usingthe following procedure:1. Set the multimeter to
voltage.2. Place the (–) terminal of
the multimeter on pins1, 2, 3, or 6 of CN206on the C180 MAINboard.
3. Place the (+) terminal onpin 2 of CN207 on theC180 MAIN board(GND).
With power on, does themultimeter detect current?
YesReplace the C180MAIN board.
Continued on next page
EPL-5500W Service Manual Troubleshooting
Rev. A 5-5
Table 5-6. Clear Paper Jam (2) (Continued)
Cause Step Checkpoint Finding Solution
Paper take-up sensor flagposition may be incorrect.
4Is the paper take-up sensorflag position incorrect?
YesReseat the papertake-up sensor flag.
Paper take-up roller maybe bad.
5 — —Replace the papertake-up roller.
Table 5-7. Check Toner & Cover
Cause Step Checkpoint Finding Solution
The interlock switch leveris bad.
1Does the switch turn on whenthe case is closed?
NoReplace theinterlock lever.
The interlock switch maybe bad.
2Does the switch toggle?(Check with a multimeter.)
NoReplace theinterlock switch.
The PWB-E board may bedead.
3
With power on, is there anoutput of +24 VDC betweenpin 1 (+) and pin 2 (–) forCN207 on C180 MAIN board?
NoReplace the PWB-Eboard.
Table 5-8. Service Error (1)
Cause Step Checkpoint Finding Solution
The connector for thethermistor may bedisconnected.
1Is the thermistor connectordisconnected?
Yes Connect it.
The C180 MAIN boardmay be bad.
2Does the heater lampremain lit up until the erroroccurs?
YesReplace the C180 MAINboard.
The heater lamp orthermal fuse in the fusingunit may be bad.
3Does the heater lampcome on at power on?
NoReplace the heater lampor thermal fuse in thefusing unit.
The PWB-E board maybe dead.
4 — —Replace the PWB-Eboard.
Troubleshooting EPL-5500W Service Manual
5-6 Rev. A
Table 5-9. Service Error (2)
Cause Step Checkpoint Finding Solution
Connector CN211 on theC180 MAIN board may bedisconnected.
1Is CN211 on the C180 MAINboard disconnected?
Yes Connect it.
The fan motor may be bad. 2 — — Replace it.
Table 5-10. Service Error (3)
Cause Step Checkpoint Finding Solution
The optical unit may be bad. 1 — —Replace theoptical unit.
The C180 MAIN board maybe bad.
2 — —Replace the C180MAIN board.
Table 5-11. Service Error (4)
Cause Step Checkpoint Finding Solution
The optical unit may bebad.
1 — —Replace the opticalunit.
The C180 MAIN boardmay be dead.
2 — —Replace the C180MAIN board.
EPL-5500W Service Manual Troubleshooting
Rev. A 5-7
5.4.2 Print Quality Anomalies
This section describes how to isolate possible causes of a print quality problem.
Table 5-12. Print Quality Anomalies
Symptom Possible Cause Part Name Check Item Remedy
Low image density Poordevelopment
PWB-F board —Replace the PWB-Fboard.
Image transferproblem
Image transferunit
Check to see if thesurface of imagetransfer unit isdamaged.
Replace the imagetransfer unit.
PWB-F board —Replace the PWB-Fboard.
Defective PCdrum
Photoconduc-tor unit
—Replace thephotoconductor unit.
Improper printdensity setting
— —Adjust the printdensity using theprinter settings.
Foggy background Poor develop-ment
Tonercartridge
—Replace the tonercartridge.
Impropercharging
Drum charge
—Replace the PWB-Fboard.
Check the wiring ofthe PC drum chargingbias line.
Replace thephotoconductor unit.
Improper printdensity setting
— —Adjust the printdensity using theprinter settings.
Troubleshooting EPL-5500W Service Manual
5-8 Rev. A
Table 5-12. Print Quality Anomalies (Continued)
Symptom Possible Cause Part Name Check Item Remedy
Blank print
Poordevelopment
Imagingcartridge
Check whether thetoner cartridge isinstalled properly.
Reinstall the tonercartridge.
PWB-F board —Replace the PWB-Fboard.
Impropercharging
PWB-F board —Replace the PWB-Fboard.
Poor imagetransfer
Image transferunit
Check the surface ofthe image transferunit.
Replace the imagetransfer unit.
PWB-F board —Replace the PWB-Fboard.
Improper printdensity setting
— —Adjust the printdensity using theprinter settings.
Defective opticalunit
Optical unit —Replace the opticalunit.
Black printImpropercharging
Photoconduc-tor unit
—Replace thephotoconductor unit.
PWB-F board —Replace the PWB-Fboard.
Poordevelopment
Tonercartridge
—Replace the tonercartridge.
PWB-F boardReplace the PWB-Fboard.
Improper printdensity setting
— —Adjust the printdensity using theprinter settings.
Defective opticalunit
Optical unit —Replace the opticalunit.
White/black linesand bands.
Impropercharging
Photoconduc-tor unit
—Replace the imagingcartridge.
Poordevelopment
PWB-F board —Replace the PWB-Fboard.
Tonercartridge
—Replace the tonercartridge.
Dirt on the fusingroller
Fusing roller — Clean the fusing roller.
EPL-5500W Service Manual Troubleshooting
Rev. A 5-9
Table 5-12. Print Quality Anomalies (Continued)
Symptom Possible Cause Part Name Check Item Remedy
Toner smudges onthe back side of thesheet.
Impropercharging
PWB-F —Replace the PWB-Fboard.
Poordevelopment
PWB-F —Replace the PWB-Fboard.
Improper fusing Fusing unit —Replace the fusingunit.
Offset print
Improper fusing Fusing unit —Replace the fusingunit.
White spotsPoor imagetransfer
Image transferunit
—Replace the imagetransfer unit.
PWB-F —Replace the PWB-Fboard.
Troubleshooting EPL-5500W Service Manual
5-10 Rev. A
Chapter 6 Maintenance
Table of Contents
6.1 MAINTENANCE 6-16.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.1.2.1 Periodic Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.1.2.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
List of Figures
Figure 6-1. Position of the Special Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Figure 6-2. Cleaning the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
List of Tables
Table 6-1. Periodic Service Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3Table 6-2. Cleaning Parts and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
6-ii Rev. A
6.1 MAINTENANCE
The EPL-5500W is a page printer that uses an electrophotographic printing method. Unlike most impact orink-jet printers, the key components in the electrophotographic process are integrated into two expendableunits (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential toensure high-quality output. Other maintenance items are also described in this chapter, which is divided intotwo sections: user maintenance (preventive maintenance) and service maintenance (repair).
6.1.1 User Maintenance
Users can achieve maximum print quality from the printer by following the procedures below:
6.1.1.1 Cleaning
This section describes the cleaning required for optimal print quality.
❒ External Cleaning
Be sure to disconnect the printer from the power outlet before cleaning it. Wipe the cover and external partsof the printer with a damp cloth that has been soaked in a neutral cleaning solution.
❒ Internal Cleaning
Be sure the printer has been disconnected from the power supply and that the fusing unit has cooled down. Ifthe electrode comb of the image transfer unit is dirty, clean it with a special tool, using the following steps:
1. Pick up the electrode comb cleaner from the upper unit.
2. Wipe the electrode comb surface from end to end with the electrode comb cleaner several times.
Figure 6-1. Position of the Special Tool
Electrode Comb Cleaner
Cleaner Section
Pre-image Transfer Roller
Image Transfer RearGuide
Figure 6-2. Cleaning the Electrode Comb
EPL-5500W Service Manual Maintenance
Rev. A 6-1
6.1.1.2 Replacement of Consumables
This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5%print ratio.
If printed images become faint, remove the toner cartridge and gently shake it. This will distribute the tonerand may make the images darker. If the image is still too light, replace the toner cartridge cartridge.
If the printed image remains faint after you have replaced the toner cartridge, change the photo-conductor unit.
Maintenance EPL-5500W Service Manual
6-2 Rev. A
6.1.2 Service Maintenance
This section describes the periodic service maintenance and the cleaning required.
6.1.2.1 Periodic Service Maintenance
The following units need service maintenance periodically, because they are subject to functionaldeterioration as the total number of printed pages increases, resulting in bad print quality.
Table 6-1. Periodic Service Maintenance
Unit Service Interval
Image transfer unit Approx. 100,000 pages
Fusing unit Approx. 100,000 pages
The service interval listed above is only a reference value. You do not need to perform service maintenanceexactly at this time.
6.1.2.2 Cleaning
Some parts of this printer require regular cleaning. Clean each part using the specified method and tools.(Refer to Chapter 3 for disassembly procedures.)
Table 6-2. Cleaning Parts and Procedures
Parts Name Cleaning Procedure
Paper take-up roller Wipe the surface with a dry soft cloth.
Upper fusing roller (in fusing unit)Dip a soft cloth in silicon oil and wipe the dust off.
Lower fusing roller (in fusing unit)
Thermistor (in fusing unit) Dip a soft cloth in denatured alcohol and wipe thedust off.Paper separator and rollers (in fusing unit)
EPL-5500W Service Manual Maintenance
Rev. A 6-3
Maintenance EPL-5500W Service Manual
6-4 Rev. A
Appendix A Reference Materials
Table of Contents
A.1 CONNECTOR PIN ASSIGNMENTS A-1A.1.1 Main Board (C180 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
A.2 CIRCUIT DIAGRAM A-7
A.3 CIRCUIT BOARD COMPONENT LAYOUT A-12
List of Figures
Figure A-1. Connector Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Figure A-2. C180 MAIN Circuit Diagram (1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-7Figure A-3. C180 MAIN Circuit Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Figure A-4. PWB-E (120V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10Figure A-5. PWB-E (220/240V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . A-11Figure A-6. C180 MAIN Component Layout (Side A) . . . . . . . . . . . . . . . . . . . A-12Figure A-7. C180 MAIN Component Layout (Side B) . . . . . . . . . . . . . . . . . . . A-13
List of Tables
Table A-1. Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2Table A-2. CN2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3Table A-3. CN202 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-4. CN203 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-5. CN204 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-6. CN205 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-7. CN206 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-8. CN207 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-9. CN208 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-10. CN209 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-11. CN210 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-12. CN211 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
A.1 CONNECTOR PIN ASSIGNMENTS
Figure A-1 illustrates the interconnection of the primary components. Table A-1 gives the size and adescription of each connector.
1234
M 1
Main Motor
5432
M 2
Poly gon Motor
1234
1
C N 1 M
CN206ϕAϕAϕBϕB
POLYGON CTL5 VD CG N D24 VDCN C
12
M 3
Fan Moto r CN211FA N24 VDC
CN 2 1 0
1231
23C N 3 S
AN ODE (PC1)G N DP C3
P C 3
CN 2 0 8Paper Exit Sensor
1231
23CN1S
ANODE (PC1)G N DPC 1
P C 1
CN203Paper Take-up Sensor
456
N C24 VDCFE E D1
S L 1 121
2
Paper Take-upSolenoid
C N2S
Fus ing Rol le rTher mistor
TH 112
THE RMIS TOR5 VD C
CN202
123
H V CHV THV SEL1
456
HV SEL2H V BB IAS MON
78
12345678
PWB- S87654321
CN204
PWB- F
HighVo ltageUn it
87654321
G N D24 VDC
CN1F
ImageTransferHousing
Imag eTransferCharger
123
24 VDCFE E D2N C
456
5 VD CG N DP E MP2
78
PSIZE 02NDBIN
910
mm/ inch esUNIVERS AL
118
CHE CK 1
PWB- A87654321
CN1A
1 211109
CN209
12
S L 2
Paper Take-upSo leno id
24 VDCFE E D2
2nd Paper Feed ingUn it ( Optional)
CHE CK 2
7654321
1234567
PWB - D
CN205 C N 1 D
Laser DiodeDr ive Board
12345
12345
D C 5 VL DAT A
G N DLD APC1 (LDVR1)LD APC1 (LDVR2)
C O
S SCAN
CN207
P WB -E
123
H 1
T F 1
Fus ing Rol le rHeate r Lamp
Fusing Roller Thermal Fuse
CN1ECN3E
24 VDCG N DG N D
5 V DC
FUS E R L AMP
InterlockSwitch
InletBo ar d
Power SW
Inlet
PowerUn it
H EAT NN C
HEA T L
C180 MAINBoard
H O STP C
C N 2
Figure A-1. Connector Connections
EPL-5500W Service Manual Appendix
Rev. A A-1
Table A-1. Board Connector Summary
Connector Description Pins Reference
Main Board (C180 MAIN Board)CN1 Video interface (not used) 20 pins —CN2 Centronics parallel interface 36 pins Table A-2
CN202 Connector for thermistor 2 pins Table A-3
CN203Connector for paper take-up solenoid and paper take-upsensor
6 pins Table A-4
CN204Connector for high-voltage supply board (PWB-S and PWB-Fboard)
8 pins Table A-5
CN205 Connector for optical unit 7 pins Table A-6CN206 Connector for motor 4 pins Table A-7CN207 Connector for power supply board (PWB-E board) 5 pins Table A-8CN208 Connector for paper exit sensor 3 pins Table A-9CN209 Connector for lower paper cassette 12 pins Table A-10CN210 Connector for optical unit 5 pins Table A-11CN211 Connector for fan 2 pins Table A-12
Power Supply Board (PWB-E Board)CN1 Connector for AC power inlet 4 pins —CN2 Connector for main board 5 pin Table A-8CN3 Connector for heater lamp 3 pins —
High-Voltage Supply Board (PWB-F Board)CN1 Connector for main board 8 pins Table A-5CN2 Connector for paper take-up sensor 3 pins —
Appendix EPL-5500W Service Manual
A-2 Rev. A
A.1.1 Main Board (C180 MAIN Board)
Table A-2. CN2 Pin Assignments
Pin No. Signal Name I/O Description
1 STROBE I STROBE signal2 DATA1 I Data bit 13 DATA 2 I Data bit 24 DATA 3 I Data bit 35 DATA 4 I Data bit 46 DATA 5 I Data bit 57 DATA 6 I Data bit 68 DATA 7 I Data bit 79 DATA 8 I Data bit 810 ACKNLG O ACKNLG signal11 BUSY O BUSY signal12 PE O PE signal13 SLCT O SLCT signal14 AUTO-FEED I AUTO-FEED signal15 NC — Not connected16 GND — GND
17 CHASSISGND — CHASSIS GND
18 NC — Not connected19 GND — GND20 GND — GND21 GND — GND22 GND — GND23 GND — GND24 GND — GND25 GND — GND26 GND — GND27 GND — GND28 GND — GND29 GND — GND30 GND — GND31 INIT I INIT signal32 ERROR O ERROR signal33 GND — GND34 NC — Not connected35 +5 — +5 VDC36 SLCT IN I SLCT IN signal
EPL-5500W Service Manual Appendix
Rev. A A-3
Table A-3. CN202 Pin Assignments
Pin No. Signal Name I/O Description
1 +5 — +5 VDC2 TH I Fuser temperature
Table A-4. CN203 Pin Assignments
Pin No. Signal Name I/O Description
1 PS1 I Paper take-up sensor2 GND1 — Ground3 PS1 I Paper take-up sensor4 NC — Not connected5 +24V — +24 VDC6 FEED1 O Paper take-up solenoid drive
Table A-5. CN204 Pin Assignments
Pin No. Signal Name I/O Description
1 HV-C —2 HV-T I3 HV-S —4 HV-S2 —5 HV-B6 BIAS-M O7 GND2 — Ground8 +24 — +24 VDC
Table A-6. CN205 Pin Assignments
Pin No. Signal Name I/O Description
1 SSCAN I Horizontal synchronous signal2 LD-CTL I Laser power signal3 LDAPC2 O Laser power adjust 24 LDAPC1 O Laser power adjust 15 GND1 — Ground6 LDATA O Laser data7 +5V — +5 VDC
Table A-7. CN206 Pin Assignments
Pin No. Signal Name I/O Description
1 A O Motor phase A2 A O Motor phase A3 B O Motor phase B4 B O Motor phase B
Appendix EPL-5500W Service Manual
A-4 Rev. A
Table A-8. CN207 Pin Assignments
Pin No. Signal Name I/O Description
1 +24V — +24 VDC2 GND2 — Ground3 GND1 — Ground4 +5V — +5 VDC5 FUSER O Heater lamp on
Table A-9. CN208 Pin Assignments
Pin No. Signal Name I/O Description
1 PS3 I Paper exit sensor2 PS3 I Paper exit sensor3 GND — Ground
Table A-10. CN209 Pin Assignments
Pin No. Signal Name I/O Description
1 +24 V — +24 VDC2 FEED2 O Lower cassette solenoid on3 NC — Not connected4 +5V — +5 VDC5 GND1 — Ground6 PE2 I Lower cassette paper empty7 PSIZ08 PSIZ19 PSIZE210 CHECK111 CHECK212 CHECK3
Table A-11. CN210 Pin Assignments
Pin No. Signal Name I/O Description
1 NC — Not connected2 +24V — +24 VDC3 GND2 — Ground4 +5V — +5 VDC5 P-CTL O Polygon motor control
Table A-12. CN211 Pin Assignments
Pin No. Signal Name I/O Description
1 +24V — +24 VDC2 FAN O Fan control
EPL-5500W Service Manual Appendix
Rev. A A-5
Appendix EPL-5500W Service Manual
A-6 Rev. A
A.2 CIRCUIT DIAGRAMS
Figure A-2. C180 MAIN Circuit Diagram (1/2)
EPL-5500W Service Manual Appendix
Rev. A A-7
Appendix EPL-5500W Service Manual
A-8 Rev. A
TO
DX
VID
EO
XH
SY
NC
X
R2
12
2.2
KR
20
82
.2K
1
2
3
4
8
7
6
5
RM
20
13
.3K
R2
11
10K
P5
4/C
NT
R0
15
P7
2/S
CL
K2
9
P5
3/IN
T4
16
P7
1/S
OU
T2
10
P70
/SIN
2 1
1
P00
56
P86
/RT
P4
66
P5
6/D
A1
13
P5
7/D
A2
12
P60
/AN
5
3
P81
/DA
4 7
1
P76
/AN
3
5
P04
52
P7
5/A
N2
6
P6
3/A
N9
/AM
P+
78
P6
4/A
N1
0/A
MP
- 7
7
P3
7 5
7
P77
/AN
4
4
AM
PO
UT
79
P02
54
XIN
30
XO
UT
31
P8
2/R
TP
0 7
0
P8
3/R
TP
1 6
9
P8
4/R
TP
2 6
8
P8
5/R
TP
3 6
7
P0
1 5
5
P0
3 5
3
P0
7 4
9
P2
2 3
8
P2
4 3
6
P3
6 5
8
P4
0 2
9
P4
1 2
8
P4
3/IN
T1
24
P4
7/S
RD
71
20
P5
0/T
OU
T 1
9
P5
1/I
NT
2 1
8
P5
2/I
NT
3 1
7
P6
2/A
N7
1
P8
7/R
TP
5 6
5
P3
36
1
P3
0/R
TP
66
4
P3
1/R
TP
76
3
P3
26
2
P4
2/IN
T0
25
P2
04
0
P21
39
P23
37
P4
6/S
CL
K1
21
P45
/TX
D2
2
P44
/RX
D2
3
RE
SE
T2
7
P1
54
3
P3
46
0
P1
64
2
P1
44
4
P13
45
P10
48
P1
14
7
P1
24
6
P3
55
9
P25
35
P26
34
P27
33
P80
/DA
37
2
P73
8
P0
55
1
P0
65
0
P5
5/C
NT
R1
14
P6
1/A
N6
2
P7
4 7
P1
74
1
VC
C7
3
AM
PV
CC
80
AD
VR
EF
74
P6
5/A
N1
1/D
AV
RE
F7
6
VS
S3
2
AV
SS
75
CN
AV
SS
26
IC2
01
M3
80
7X
R2
072
.2K
C2
39
0.0
1U
+5
V 7
SS
CA
N 1
LD
AT
A 6
LD
AP
C1
4
LD
AP
C2
3
LD
_C
TL
2
GN
D1
5
CN
20
5
11
12
13
IC2
02D
74
HC
02
R2
06
33
R2
54
1K
R2
53
68
0
C2
53
47
00
P
C2
58
0.1
U
8 9 1
0
IC2
02C
74
HC
02
C2
52
10
00
P
R2
96
10
K
R2
91
10
K
TP
20
4T
P
VC
C 7
C 5
GN
D 4
OU
T
6
NC
1
NC
2
NC
3
NC
8
IC2
51
M5
19
53A
FP
C2
57
0.1
UC
20
7
10
P
EP
RD
YX
PR
RD
YX
ET
BS
YX
SR
CL
KX
STS
XC
MD
X
CT
BS
YX
CP
RD
YX
RE
SE
TX
PR
INT
X
PS
3
1
PS
3
3
GN
D
2
CN
20
8
+2
4V
5
NC
4
PS
1
1
PS
1
3
FE
ED
1
6
GN
D1
2
CN
20
3
C2
40
0.0
1U
1
16
IC2
03
A
ULN
20
03
A
R2
13
22
0 1
/4W
R21
42
20
1/4
W
R21
6
47
K
R2
15
47K
C2
55
0.0
1U
C2
56
0.0
1U
C2
54
0.0
1U
40
0m
A
C2
51
10
00
P
1 3 2
VR
20
11
0K
R21
03
.0K
R2
09
1.0
K
C23
81
00
0P
C23
71
00
0P
C23
61
00
0P
C23
51
00
0P
C2
32
10
00
PC
231
10
00P
C2
30
10
00
P
C22
91
00
0P
C2
59
0.1
U
C2
43
0.1
U
PL
AC
E N
EA
R C
N2
05
PL
AC
E N
EA
R C
N21
0
NC
1
+2
4V
2
+5
V 4
P_
CT
L 5
GN
D2
3
CN
21
0
+5
V 2
TH
1
CN
20
2
TP
202
TP
+2
4V
2
FA
N 1
CN
21
1
C20
6
10
00P
R2
27
6.8
1/4
W
20
0m
A
R20
3
3.0
K 1
.0%
C2
14
10
00
P
DT
20
1
FB
1L
3N
R2
26
47
KR
29
5
10
K
C21
60
.01
U
1
2 3
4
8
7
6
5
RM
20
24
.7K
R23
34
.7K
R23
44
.7K
R2
364
7K
+2
4V
1
+5
V
4
NC
3
PE
2
6
PS
IZ0
7
PS
IZ1
8
PS
IZ2
9
FE
ED
2
2
CH
EC
K1
10
CH
EC
K2
11
CH
EC
K3
12
GN
D1
5
CN
209
C2
41
0.0
1U
C2
271
00
0P
C2
26
100
0P
C2
251
00
0P
7
10
IC2
03
G
UL
N20
03
A
2
15
IC20
3B
UL
N2
00
3A
5
12
IC20
3E
UL
N2
00
3A
3
14
IC20
3C
UL
N2
00
3A
C2
19
10
00
P
C2
20
10
00
P4
00
mA
C2
17
10
00
P
C2
18
10
00
P
C2
05
22P
CR
20
18
MH
z
C2
04
22
P
2 3
1
IC2
02
A
74
HC
02
5 6
4
IC2
02
B
74
HC
02
R2
93
10K
IC2
02-
14
4 1
3
IC2
03
D
UL
N20
03
A
C2
03
0.1
U
TP
20
3
TP
TP
20
1
TP
IC2
02-
7
C2
01
220
U/1
6V
FU
SE
R 5
+2
4V
1
GN
D2
2
+5
V 4
GN
D1
3
CN
207
A 1
A 2
B 3
B 4
CN
206
1A
R2
19
1K
R2
17
56
K
C2
108
20
P
C2
08
82
0P
R2
24
2.7
1/4
W
R2
21
1 1
/2W
1A
MA
15
MB
1
E 1
6
C 1
0
T
2
PH
8
I0 9
I1 7
VM
M 3
VM
M1
4
VC
C 6
VC
C1
1
GN
D 4
GN
D 5
GN
D1
2
GN
D1
3
IC2
04
TE
A37
18
SD
P
R2
92
10
K
1A
R2
38
10
KR
23
71
0K
R2
04
39
K
R20
56
.8K
TP
20
5T
P
R2
90
10
K
C21
5
0.1
U
6
11
IC2
03
F
ULN
20
03
AD
201
1S
S2
26
R22
3
10
0K
C2
13
0.0
22U
GN
D
8
NC
9
IC2
03
20
03X
C2
33
10
00
P
C22
41
00
0P
C22
31
000
P
C22
21
00
0P
C2
21
10
00
P
C23
4
10
00P
C2
281
00
0P
C2
42
0.1
U
HV
_S
2
4
+2
4V
8
HV
_C
1
HV
_S
3
HV
_T
2
HV
_B
5
BIA
S_
M
6
GN
D2
7
CN
20
4
C20
20
.1U
MA
15
MB
1
E 1
6
C 1
0
T
2
PH
8
I0 9
I1 7
VM
M 3
VM
M1
4
VC
C 6
VC
C1
1
GN
D 4
GN
D 5
GN
D1
2
GN
D1
3
IC2
05
TE
A3
71
8S
DP
C2
124
7U
35
V
1A
R2
201
K
R21
85
6K
C2
11
820
P
C2
09
820
P
R2
25
2.7
1/4
W
R2
22
1 1
/2W
1A
Figure A-3. C180 MAIN Circuit Diagram (2/2)
EPL-5500W Service Manual Appendix
Rev. A A-9
LN
F16.3A, 125V
R1
470K
C1
0.22uF125V
NR
1E
NC
271D
-10
Z7D
271
L1Z0408, Z0462
C3
C4
C3
, C4
2200pF
125V
C2
0.1uF
125V
BD
1D
258A50
D2S
860
Th1100-g,M
100 10C,
M10007C
NTH
9D100LA
C19
0.01u250V
R24
100K0.5W
D4
EU
2A, A
GIC
ER
A22-06
R4
220K-180K
0.25W
R5
390K
0.25W
Q1
2SK
1445
2SK
1446
R7
4.7
C5
2200pF125V
+
C5
330u
F2
00V
C8
680p
1kV
500V
R5
222W
L10
ZD
2H
ZS
15
R11
68K
Q2
D1207
C1213
C1815
PC
1P
C81
7
C9
0.0
1uF5
0V
R8
6800.5W
R9
10K
ZD1
HZS
18-20
R10
22K
R25
18K
C10
4700p
F50
V
T1
Z04
96
D2
YG
901C2
D5LC
20U
D3
YG
801C4
D5S
C4M
FMB
-24M
+C
173300uF10V
++
C15
1000uF35V
C1
6100
0uF35V
R27
1.2K0.5W
R19
1.2K0.5W
R20
1.2K0.5W
R26
1.2K0.5W
L9
L7Z0
400
SC
R1
TF3215
2P4M
ZD4
HZS
27Z
D3
HZ
S6
R29
33R
3033C
21 1uF, 50V
R22
1000.5W
34 2 15
SW
2A
M51662A
531
CN
1
+24V
+24V G
ND
+5V G
ND
+5.1V
H.L
R12
1K0.25W
R21
0.25W
PC
2S
21M
D4
VS
21M
E4F
D1
ER
AG
1-21
1S
S8
1R
283
3
R12
1.2K
C14
0.0
47uF
50V
R1
433
0
PC
1P
C917
IC1
L5431TL431uP
C1093
HA
17431
C1
30.1uF50V
R1
547K
VR
11K
R15
1.8K
C7
0.1uF125
VL11
Z0
068
TRC
TM8415
SM
8GZ47
R2
4.7R3
33
13
CN
353259-0320
NL
Figure A-4. PWB-E (120 V) Circuit Diagram
Appendix EPL-5500W Service Manual
A-10 Rev. A
+
5
1 2 3
N.
HE
AT
ER
36
0W
L.
1 2 3
N.
HE
AT
ER
36
0W
L.
CN
2
INL1
SW
1W
H1
WH
2
F1
25
0V
5A
C1
25
0V
0.3
3u
F
VS
14
70V
L1
CM
102
L2
CM
102
R1
1/4
W4
70
K
R2
1/4
W4
70
K
C2
250
V2
200
pF
C3
250
V2
200
pF
C4
25
0V
0.1
uF
RC
16
00V
, 1.5
AR
T1
10
C7
40
0V8
2uF
RC
51
20
0V
10
A
RC
512
00V
10
A
+
+
- +
1 2 4 3
ZC
VS
24
70
V
C2
12
50
V0
.1u
F
TH
16
00V
5A
C2
20
.01
uF
R2
11
/2W
1K
R2
21
/2W
33
PI6
1
61
42
R6
91
W1
.2K
CN
1
FU
SE
R L
AM
P
+2
4V
GN
D(+
24
V)
+5
.1V
GN
D(+
5.1
V)
R3
1/2
W4
70
K
R4
1/2
W4
70K
C9
1K
V1
00p
F
R6
2W
10
0
Q1
80
0V
3A
R1
24
.7K
1/4
W
R5
3W
10
0K
D1
800
1A
C8
63
0V
0.0
1u
F
T1
TM
19
9
D2
70V
0.1
5A
C1
00
.03
3u
F
Q2
50
V2
A
VR
12
00
C1
10
.04
7uF
R7
2W
16
R8
2W
16
R9
2W
16
R10
39
0
D3
2.0
-2.2
V
R1
11
00
D4
70
V0
.15
A
+
+
C62
35
V2
20
0u
FR
632
W1
.2K
R6
42
W1
.2K
SW
61
L62
CL
086
C6
41
0V
22
00
uF
+
C65
50
V1
0u
F
R7
3W
IRE
, PE
S
R6
63
W3
3
PI5
1
5 4
1 2
M5
1
R51
100
R5
21
K
C51
4.7
uF
R6
31
.58
K1
%
R5
41
.47
K1
%
D62
28
.2-
29
.6V
D6
14
.7-
4.9
V
D6
37
0V
0.1
5A
D64
70
V0
.15
A
TH
61
40
0V
5A
C6
14
.7u
F
R6
24
7
R6
11
K
R7
02
21
/4WD
651
9.5
-20
.4V
M6
1
7
8
4
6 5
C66
0.1
uF
R71
10
0
R7
23
.9K
Figure A-5. PWB-E (220/240 V) Circuit Diagram
EPL-5500W Service Manual Appendix
Rev. A A-11
A.3 CIRCUIT BOARD COMPONENT LAYOUTS
Figure A-6. C180 MAIN Component Layout (Side A)
Appendix EPL-5500W Service Manual
A-12 Rev. A
Figure A-7. C180 MAIN Component Layout (Side B)
EPL-5500W Service Manual Appendix
Rev. A A-13
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