b 443 service manual

TEC Bar Code Printer

B-443

Original Oct., 1999(Revision )

Document No. EO0-33006

PRINTED IN JAPAN

Service Manual

September, 99 All Rights Reservedi

B-443 Bar Code PrinterService Manual

Table Of Contents

1.FUNDAMENTALS ABOUT THE SYSTEM.....................................................................................1

1.1 Features of the B-443.............................................................................................................1

1.2Model Naming Syntax..............................................................................................................1

1.3 Overview................................................................................................................................2

1.3.1 Front View......................................................................................................................2

1.3.2 Rear View.......................................................................................................................3

1.4 Basic Specifications................................................................................................................4

1.5 Effective Print Area.................................................................................................................6

1.6 Available Bar Codes...............................................................................................................6

1.7 Various Sensors......................................................................................................................7

2. SUPPLY SPECIFICATIONS .........................................................................................................9

2.1 Types of Paper.......................................................................................................................9

2.2 Specifications.........................................................................................................................9

2.3 Ribbon Sizes and Shapes.....................................................................................................10

3. ELECTRONICS...........................................................................................................................11

3.1 Circuit Description.................................................................................................................11

3.2 MCU Pin Description.............................................................................................................13

3.3 Reset Circuit.........................................................................................................................15

3.4 Memory System....................................................................................................................15

3.5 Connector Circuit Diagram....................................................................................................16

3.6 Real-Time Clock Circuit........................................................................................................18

3.7 Decode Circuit......................................................................................................................19

3.8 Thermal Head Drive/ Protection and History Control Circuit..................................................21

3.9 24V/5V Converter Circuit......................................................................................................22

3.10 Stepping Motor And DC Motor Driver/ Protection Circuit.....................................................23

3.11 Communication (Serial & Parallel Port) Circuit....................................................................24

3.12 Cutter Drive Circuit.............................................................................................................25

3.13 Mainboard Replacement.....................................................................................................26

3.14 Flash memory Replacement...............................................................................................30

3.15 Cutter, DC Motor, Stepping Motor Driver IC Replacement..................................................31

September, 99 All Rights Reservedii


4. MECHANISM..............................................................................................................................32

4.1 Cutter Installation..................................................................................................................32

4.2 Print Head Replacement.......................................................................................................33

4.3 DC Motor Replacement.........................................................................................................35

4.4 Ribbon Rewind Spindle Encoder Replacement.....................................................................36

4.5 Felt Fabric Replacement.......................................................................................................37

4.6 Stepping Motor Replacement................................................................................................39

4.7 Black Mark Sensor / Gap Sensor (Receiver) Replacement...................................................40

4.8 Ribbon Sensor (Receiver) Replacement...............................................................................41

4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement.................................43

4.10 Platen Replacement............................................................................................................44

4.11 Parts List.............................................................................................................................47

5. TROUBLE SHOOTING...............................................................................................................57

5.1 Error Messages.....................................................................................................................57

5.2 Trouble Shooting..................................................................................................................58

5.3 Calibrate the Gap Register....................................................................................................59

5.4 Self-test................................................................................................................................59

5.5 Ram Clear............................................................................................................................59

5.6 Diagnosis Operation Procedure.............................................................................................59

5.7 Testing Sensors....................................................................................................................60

5.8 Cleaning the Print Head........................................................................................................62

September, 99 All Rights Reserved1


1. FUNDAMENTALS ABOUT THE SYSTEM

1.1 Features of the B-443

1. B-443 bar code printer prints bar codes, characters, logos, on various types of labels andtickets by direct thermal or thermal transfer printing.

2 B-443 adopts a BASIC-like high level programming language to help users programme thedesired label forms with ease.

3. B-443 bar code printer can be connected to personal computer or optional LCD keyboard toexecute the programs downloaded in the printers memory. The printer is equipped with thefollowing standard devices: black mark sensor, peel off module and real time clock

4. B-443 bar code printer provides a selection of optional features, including cutter module,memory module, portable LCD keyboard, etc.

5. User friendly label design package software is bundled with B-443.

1.2 Model Naming Syntax

B 4 4 3 Q Q

Destination Code: QQ: NorthAmerica QP: Europe GH12-GB: UK



1.3 Overview

1.3.1 Front View

Fig. 1.1 Front View of B-443

Front PanelCover Release Button

Top CoverOperation Panel



1.3.2 Rear View

Fig. 1.2 Rear view of B-443

DC Power Jack RS-232 Interface Centronics Interface

Label Entrance(External MountUse)

Power Switch



1.4 Basic Specifications

n Thermal transfer and direct thermal printingn High dot density printing (203 dots/inch)n Selectable print speeds at 1.5, 2.0 or 3.0 per secondn Supports parallel and serial interfacen Maximum media width up to 4.4 (114 mm)n Adjustable label edge guiden International character setsn Print area is 4.09W x 90L (without any file downloaded in the printer memory)n User selectable bar code ratios and heightsn Prints on labels or ticketsn Equipped with black mark sensorn Equipped with Real Time Clockn Comes with self-peeling functionn Buzzer provided to warn of possible errorsn Label stock and thermal transfer ribbon easy to installn Internal label print countern Self test and hex dump moden Downloadable fonts from label design software

Electronics/Communication Specificationsn ElectricalCPU: MITSUBISHI M37720S1BFPTPH: ROHM 4 KF-2004-GC17BStepping Motor: MitsumiDC Motor: DC24VMemory:

wDRAM: MOSEL 2 Mb.

wFlash: ATMEL 1 Mb

Adapter 100~240VAC10%, 50~60HzRegulations: CE, FCC, UL, CUL, TV-GS, CNS

n Communications Interface:Serial port: RS-232C (DB-9) at 2400, 4800, 9600 or 19200 baud rate

wWord Length: 7 or 8 data bits, 1 or 2 stop bits, selectable parity

wHandshaking: XON/XOFF and DSR/DTR

Parallel port: Standard parallel interfaceInput Buffer: 60KB



n RS-232 Interface Pin Configuration:

Host Function 9 Pin 25 Pin 9 Pin Printer Function1 +5V

RxD 2 3 2 TxDTxD 3 2 3 RxDDTR 4 20 4 DSRGND 5 7 5 GNDDSR 6 6 6 RDYRTS 7 4 7 N/CCTS 8 5 8 RDY

9 +5V



1.5 Effective Print Area

Label/Ticket Length 12mm~2286mmEffective Print Length10mm~2284mmLabel/Ticket Width 25mm~103mmEffective Print Width 23mm~101mmNo Print Area 1mm

1.6 Available Bar Codes

n Code 39n Code 93n Code 128 UCCn Code 128, Subsets A, B, and Cn Codabarn Interleaved 2 of 5n EAN-8, EAN-13, EAN-128n UPC-A, UPC-En EAN and UPC with 2 or 5 digits add-onn UPC Shipping container coden Postnetn Maxicoden PDF-417n DataMatrix



1.7 Various Sensors

(1) Feed Gap SensorThe feed gap sensor detects label gap to locate the starting print position of the next label. Thesensor is mounted 4 mm off the center line of the main mechanism.

.n In case of Label

(2) Black Mark SensorThe black mark sensor locates the position of label by emitting infrared rays onto the black markat the back of the ticket. The sensor is mounted 5.75 mm off the center line of the ticket roll widthon the mechanism.



n In case of Ticket

The default sensor position is (1) as shown in the figure below. To change to the (2) position, the

customer should notify the manufacturer in advance. There can be only one position for the

sensor. Once the sensor position is agreed upon, it can not be changed afterwards.

(3) Ribbon End SensorThe sensor detects the end portion of the ribbon. The ribbon end must be transparent.

(4) Label End SensorThe sensor detects the end portion of the label.

(5) Peel off SensorThe sensor detects the backing paper of a label.

(6) Ribbon encoderThe encoder is used to detect if the ribbon is broken.



2. SUPPLY SPECIFICATIONS

2.1 Types of Paper

Two types of media are available for B-443: label and ticket.

In B-443, there are two types of sensors for paper: gap sensor and black mark sensor.

Label and ticket can be further classified into direct thermal type or thermal transfer type.

2.2 Specifications

Items LabelMax.114mm

Paper WidthMin. 25.4mm

Length (Pitch) 12 2286mmPaper Thickness0.05 0.20mmPaper Weight Max 240 g/ m2

Inner roll diameter. Max 4.3 (110mm)Max. RollDiameter(1 core) External roll diameter. Max 8.4 (214mm)

Roll Up Method Print surface wound outside as standardPaper Core ID. f25.70.3mm

Note: (1). The width and thickness quoted above are said of the label plus its backing paper.(2). Likewise, the approval of label entails that of its backing paper.(3). In the peel off mode, the minimum pitch is 35mm.(4). In the cutter mode, it is required the paper be wound outside. Otherwise, paper jam

tends to result.(5). In the cutter mode, the paper thickness is 0.2 mm at maximum, and the paper weight

must be less than 100g/ m2.(6). Paper shape is as shown on next page.



2.3 Ribbon Sizes and Shapes

Item SpecificationsRibbon shape Spool type

Max. 110mmRibbon width

Min. 40mmMax. 110mm

Ribbon winding widthMin. 40mm

Leading tape Polyester film, 3355mm longEnd tape Polyester film (transparent), 2505mm longMax. ribbon OD. f67mmWinding method Ink surface to be wound outside

Note: The maximum length of ribbon depends on its thickness and core outsidediameter.

The formula below defines the correlation between ribbon roll length and ribbon core diameter.

t4)d(D

= L22 p-

, where

L = Ribbon lengthD = Max. roll diameterd = Ribbon core outside diametert = Ribbon thickness



3. ELECTRONICS

3.1 Circuit Description

L1

C110u

+5V

OUT 1VCC2

GN

D3

U2

S-807C20.1u

+5V

C3

20P

C4

20P

X116MHz

DO

0D

O1

DO

2D

O3

DO

4D

O5

DO

6D

O7

MA0MA1MA2MA3MA4MA5MA6MA7MA8MA9A8A9A10A11A12A13A14A15

12 U7A74LS0534 U7B

74LS0556 U7C74LS05 8 9U7D

74LS05

R83.3K

R91.8K

R10910

R11430

R131M

R/W

/RAS/CAS/E

1011 U5E

74HC04

ST0ST1

RDY

C70.1u

1

23U24A

74HC32

4

56U24B

74HC32

89

10

U24C

74HC32

L5

L21

C700.1u

C490.1u

P67/RTP131P66/RTP122

P65/RTP113

P64/RTP104P63/RTP035

P62/RTP026

P61/RTP01 7

P60/RTP008

P57/TB1IN9

P56/TB0IN 10

P55/TA4IN 11

P54/TA4OUT 12

P53/TA3IN13

P52/TA3OUT 14

P51/TA2IN 15P50/TA2OUT 16

P107/MA9 17P106/MA8 18

P105/RAS 19

P104/CAS 20

P103/TC21

P102/INT222

P101/IN

T1

23

P100/IN

T0

24

P47/DBC25P46/VPA26P45/VDA27

P44/QCL 28

P43/MX 29

30

RD

Y31

HO

LD32

BYTE

33

CN

VSS

34

RESETO

UT

35

RESET

36

XIN37

XOUT38

E 39

VSS

40

VC

C41

ST0 43

ST1 42

ALE

44

BLE45

BHE46

R/W 47

A23/D

748

A22/D

649

A21/D

550

A20/D

451

A19/D

352

A18/D

253

A17/D

154

A16/D

055

A15/D15 56A14/D14 57A13/D13 58A12/D12 59A11/D11 60A10/D10 61

A9/D9 62A8/D8 63

A7/MA7 64A6/MA6 65A5/MA5 66A4/MA4 67A3/MA3 68A2/MA2 69A1/MA1 70A0/MA0 71

P97/DMAREQ372

P96/DMAACK373

P94/DMAACK275

P92 77

P95/DMAREQ274

P93/D

MA

REQ

176

P91/DMAREQ0 78

P90/DMAACK079

P87/TXD1 80

P86/RXD181

P85/CLK1 82

P84/C

TS1/R

TS1

83

P83/TXD084

P82/RXD085

P81/CLK086

P80/CTS0/RTS087

VC

C88

AV

CC

89

VR

EF

90

AV

SS

91

VSS

92

P77/AN7 93P76/AN6 94

P75/AN5 95

P74/AN496

P73/AN397

P72/AN298

P71/AN1 99

P70/AN0 100

U1

M37721S1AFP

MA[0..9]

RX1RX2

TX1TX2

PE/ERRORSELECT

INT

COMMUNICATION SYSTEM

RX1RX2

TX1TX2

PE/ERRORSELECT

INT

PHASE1PHASE2

PHASE3

I1I0

DCMCUTTERMOTORR/W

MOTOR SYSTEM

PHASE1PHASE2

PHASE3

I1I0

DCMCUTTERMOTORR/W

/RASDRAMWR

/OEDRAMOE

R/W

MEMORY SYSTEM

/RASDRAMWR

/OEDRAMOE

R/W

DI/LAT

CLK

PH_HEAT

HISTORY

PH

TM

Vdet

PRINT SYSTEM

DI/LAT

CLK

PH_HEAT

HISTORY

PH

TM

Vdet

ALE

DO[0..7]

ST0ST1

MA[0..9]

A[8..15]

GAP_EMITTER

BUZZER

CUTTER SENSORDECODER SENSORGAP SENSORB.L. SENSORPEEL SENSOR

FEED BUTTONPAUSE BUTTON

RIBBON SENSOR

POWER LEDONLINE LEDERROR LED

PH_DETECT SENSOR

Fig. 3.1 MCU Circuit Diagram

The above is the MCU circuit diagram.

The main board of B-443 consists of five system blocks:A. Memory System (decoder & memory block)B. Motor System (stepping motor, DC motor and cutter block)C. Print head SystemD. Communication System (serial & parallel port block)E. Power System



The figure below shows the PCB system area.

Fig. 3.2 System Blocks of PCB

MOTORSYSTEM

MEMORYSYSTEM

RTC

COMMUNICATIONPORT

DECODERSYSTEM

PRINTHEADSYSTEM

POWERSYSTEM

MCU

MEMORY CARDCONNECTOR



3.2 MCU Pin Description

Pin Name Input/Output FunctionVcc, Vss Power supply Supply 5V 10% to Vcc and 0V to Vss.CNVss CNVss input Input This pin controls the processor mode.

Connected to Vss for single-chip mode, toVcc for external ROM types.

/RESET Reset input Input To enter the reset state, this pin must bekept at L condition, and maintained so forthe required time.

XIN Clock input Input

XOUT Clock output Output

These are I/O pins of internal clockgenerating circuit. Connect a ceramic orquartz crystal resonator between XIN andXOUT. When an external clock is used, theclock source should be connected to the XINpin, and the XOUT pin should be left open.

/E Enable output Output Data/instruction read and data write areperformed when output from this pin is L.

BYTE Bus widthselection input

Input In memory expansion mode ormicroprocessor mode, this pin determineswhether the external data bus is of 8-bitwidth or 16-bit width. The width is 16 bits forL signal input and 8 bits for H signalinput.

/HOLD /HOLD input pinInput This is an input pin for the /HOLD requestsignal.

/RDY /RDY input pin Input This is an input pin for the /RDY signal.

r1 Clock r1output

Output This is the r1 output pin, which is equal tothe clock XIN pin divided by 2.

ST0, ST1 Status signaloutput pin

Output The bus use status output is generated in 2-bit code

AVcc, AVss Analog supplyinput

Power supply for the A-D converter.Connect AVCC and AVSS to VSS externally.

VREF Referencevoltage input

Input This is reference voltage input pin for the A-Dconverter.

A0/MA0~A7/MA7

Address low-order/DRAMaddress

Output This is an output pin for the 8 low-order bitsof addresses. When the DRAM is to beaccessed, the row and column addressesare generated by means of time divisionmultiplexing.



A8/D8~A15/D15

Addressmedium-order/data high-order

I/O When the BYTE pin is set to L in memoryexpansion mode or microprocessor mode andexternal data bus is 16-bit width, high-order data(D15~D8) is input or output when /E output is Land an address (A15~A8) is output when /E outputis H.If the BYTE pin is H that is an external data busis 8-bit width, only address (A15~A8) is output.

A16/D0~A23/D7

Address high-order/data low-order

I/O In memory expansion mode or microprocessormode low-order data (D7~D0) is input or outputwhen /E output is L and an address (A23~A16)is output when /E output is H.

R/W, /BHEALE, /BHE

Memory Controlsignal output

Output These are R/W, /BHE, ALE, and /BLE output pins.

P40~P47 I/O port P4 I/O This port is provided 5-bit I/O. As it has an I/Oregister, it is possible to perform programming todetermine whether each bit serves as an input pinor an output pin.

P50~P57 I/O port P5 I/O This port is used for 8-bit I/O. It has basically thesame function as port P4. In addition, it providestimer A2, timer A3, timer A4 with I/O pins andTimeB0, and TimeB1 with input pins.

P60~P67 I/O port P6 I/O This port is used for 8-bit I/O. It has basically thesame function as port P4. In addition, pins P60through P63 and pins P64 through P67 arecapable of functioning as a 4-bit real-time output,respectively.

P70~P77 I/O port P7 I/O This port is used for 8-bit I/O. It has basically thesame function as port P4. In addition, it providesinput pins for analog inputs AN0 through AN7. PinP77 is also used for A-D conversion start triggerinput.

P80~P87 I/O port P8 I/O This port is used for 8-bit I/O. It has basically thesame function as port P4. In addition, it providesRxD, TxD, CLK, /CTS//RTS terminals for UART 0and UART 1.

P90~P97 I/O port P9 I/O This is an 8-bit I/O port. It has basically the samefunction as port P4. In addition, it provides DMArequest input pin and DMA acknowledge signaloutput pin.

P100~P107 I/O port P10 I/O This is an 8-bit I/O port. It has basically the samefunction as port P4. In addition, it provides the/INT0, /INT1, /INT2 input pins, /TC I/O pins, and/RAS, /CAS, MA8, MA9 output pin.



3.3 Reset Circuit

OUT1

VCC2

GN

D3

U2

S-807C20.1u C47

0.1uF

VCC

RESET

Fig. 3.3 Reset Circuit

This is the reset circuit .The 80746ALO IC outputs the system reset signal of LOW when the

driving voltage is lower than 4.6V (Typical).

3.4 Memory System

VC

C1

DQ02

DQ13

DQ24

DQ35

VC

C6

DQ47

DQ58

DQ69

DQ710

NC11

NC12

W13

RAS14

NC/A1115

NC/A1016

A017

A118

A219

A320

VC

C2

1G

ND

22

A423

A524

A625

A726

A827

A928

OE29

UCAS30

LCAS31

NC32

DQ833

DQ934

DQ1035

DQ1136

GN

D3

7

DQ1238

DQ1339

DQ1440

DQ1541

GN

D4

2

U15

TMS416160P

/RAS

DRAMWRA18

1

A162

A153

A124

A75

A66

A57

A48

A39

A210

A111

A012

AD013

AD114

AD215

GND16

AD317

AD418

AD519

AD620

AD721

CE22

A1023

OE24

A1125

A926

A827

A1328

A1429

A1730

WE31

VCC32

U16

29C040

A[8..23]

MA[0..9]

DO[0..7]

MA0MA1MA2MA3MA4MA5MA6MA7MA8MA9

DO0DO1DO2DO3DO4DO5DO6DO7 A8

A9A10A11A12A13A14A15A16A17A18

DO0DO1DO2DO3DO4DO5DO6DO7

/OE

DRAMOE

ROM1

MA0MA1MA2MA3MA4MA5MA6MA7


/LCAS/UCAS

R/W

VCC

VCC

DO[0..7]

MA[0..9]

A[8..23]

A181

A162

A153

A124

A75

A66

A57

A48

A39

A210

A111

A012

AD013

AD114

AD215

GND16

AD317

AD418

AD519

AD620

AD721

CE22

A1023

OE24

A1125

A926

A827

A1328

A1429

A1730

WE31

VCC32

U25

29C040

VCC

ROM2

A8A9A10A11A12A13A14A15A16A17A18



A191

A182

A173

A164

A155

A146

A137

A128

CE9

VCC10

NC11

RESET

12

A1113

A1014

A915

A816

A717

A618

A519

A420

A321

A222

A123

A024

DO025

DO126

DO227

DO328

GND29

GND30

VCC31

DO432

DO533

DO634

DO735

RDY36

OE37

WE38

NC39

NC40

U2649F080(TSOP)

A8A9A10A11A12A13A14A15A16A17A18



ROM3

VCC

/RESET

A19

OPTIONAL FLASH ROM

Fig. 3.4 FLASH ROMS and DRAM Diagram

This is the memory circuit. The U16&U17 type 512K Byte FLASH ROM,U26 type 1M Byte

FLASH ROM and U15 type 2M Byte DRAM are used. The MCU R/W pin becomes H when

reading Flash ROM or DRAM, and L when writing.



3.5 Connector Circuit Diagram

123456789

10111213141516171819202122232425262728293031323334353637383940

JP8

MEM. CARD

L32

BEAD

1

2

3

4

5

6

JP1

6 PIN

12 U5A74HC04

34 U5B74HC04 56 U5C

74HC04

R5

100R6

100 R7

100

1

2

3

JP2

RIBBON

1

2

3

JP4

B.L.

1

2

3

4

5

JP6

DC MOTOR

C680.1uDCMB

DCMA

1 2

U11A

74LS14

1

2

3

4

5

6

JP5

6 PIN

1234567

JP3

CUTTER&PEEL

1

2

PH_DERECT

1

2

JP8PH_DERECT

MA0MA1MA2MA3MA4MA5MA6MA7A8A9

/RESET

A10A11A12A13A14A15A16A17A18A19A20A21A22A23

/ER/WOEDO0DO1DO2DO3DO4DO5DO6DO7

+5V

+24V

+5V

+5V

+5V

+5V

+5V

+5V

P65

CUTTERP53

PH_DETECT

P45

P46

P47

P72P60

P62

P63

P57

DC_MOTOR_ADC_MOTOR_B

P64

GAP_EMITTER

Fig. 3.5 Connector Circuit Diagram

P45~P47 are output pins from MCU, which control the Power-on, Feed and Error LEDs

respectively. The LED lights on when the signal is low, goes out when the signal is on.

P72: the detect pin of push button.(normally at high level)

P60: the detect pin of feed button. (normally at high level)

P65: the detect pin of the peel-off sensor. (normally at high level)

P62: the detect pin of the ribbon sensor. (normally at high level)

P63: the detect pin of the black mark sensor. (normally at high level)

P64: the detect pin of the gap sensor and print head micro sensor. (normally at high level)

Memory card connector



P57: the detect pin of the decoder sensor. (normally at high level)

P53:the detect pin of the cutter sensor (check if the cutter is in right position, normally at high

level)

JP8: the connector which connects the external memory module.

CUTTER: the control pin of the CUTTER system.

DC_MOTOR_A: the control pin of the DC MOTOR system.

DC_MOTOR_B: the control pin of the DC MOTOR system.

GAP_EMITTER: the control pin of the GAP EMITTER system

PH_DETECT: the detect pin of the print head open detect sensor



3.6 Real-Time Clock Circuit

MOT1

NC

2

NC

3

AD04

AD15

AD26

AD37

AD48

AD59

AD610

AD711

GN

D12

CS13

AS14

R/W15

NC

16

DS17

RESET

18

IRQ19

NC20

RCLR21

NC22SQW23

VC

C24

U14

DS12887A


DO[0..7]DO[0..7]

+5V

DSRTCAS

R/W

BZ1

R505.6K

C66

0.1u

/RES

+5V

BUZZER

Fig. 3.6 Real-Time Clock Circuit

This is a real-time clock circuit. MCU will read the date/time and write the data when the signal

of RTC is low. AS is the address strobe signal. DS is the data strobe signal. R/W decides

whether MCU is in read mode or write mode. When R/W is at HIGH level, MCU reads data or

time from RTC. When R/W is at LOW level, MCU writes data to RTC.



3.7 Decode Circuit

D03

Q02

D14

Q15

D27

Q26

D38

Q39

D413

Q412

D514

Q515

D617

Q616

D718

Q719

OE1

LE11

U3

74HC373


A16A17A18A19A20A21A22A23

CLKI/01

I12

I23

I34

I45

I56

I67

I78

I89

GND10

OE/I911

I/O012

I/O113

I/O214

I/O315

I/O416

I/O517

I/O618

I/O719

VCC20

U8

PALCE16V8DIGITAL GND

A18A19A20A21A22A23/E

12345678910

RN5 10KVCC

CLKI/01

I12

I23

I34

I45

I56

I67

I78

I89

GND10

OE/I911

I/O012

I/O113

I/O214

I/O315

I/O416

I/O517

I/O618

I/O719

VCC20

U10

PALCE16V8

A13A14A15A16A17A18A19

A20

A21A22A23

C69 30p

A[8..23]

VCC VCC

/UCAS/LCASRTCDSAS

ST0ST1

/CAS

DO[0..7]

ALE

/ERESET

CENTRONIC

ROM2

ROM3ROM12ROM11

MA0

Fig. 3.7 Decode Circuit

This is the decode circuit which calculates memory map. U3 is used to latch addresses from

DO0 to DO7. The main function of U8 and U10 are to decode the address and memory controlsignal .The memory map of B-443 is as shown in Figure 1.2.

The pin function description is as follows:

AS: The address strobe control signal of RTC.

DS: The data strobe control signal of RTC.

/CAS: The DRAM column address control pin of MCU.

/LCAS: The bank 0 column address control pin of DRAM.

/UCAS: The bank 1 column address control pin of DRAM.

RTC: The chip select pin of RTC.

CENTRONIC: Enable MCU to read data from parallel port.

ROM11: The chip select pin of U16 when system is in normal mode.

ROM12: The chip select pin of U16 when system is in BIOS update mode.

ROM2: The chip select pin of U25.

ROM3: The chip select pin of U26.

ST0: Status signal output pin of MCU.

ST1: Status signal output pin of MCU.



DRAM(INTERNAL RAM2)

FFFFFFHF00000HEFFFFFH

E00000H

DRAM(INTERNAL RAM1)

8FFFFFH

800000H

FLASH ROMEXTERNAL ROM5

(ON BOARD)

FLASH ROMEXTERNAL ROM4(MEMORY CARD)

6FFFFFH

600000H5FFFFFH

500000H


RTC ADDRESS PORTRTC DATA PORT

CENTRONIC PORTPARALLEL COMMUNICATION

400001H400000H380000H

2FFFFFH

200000H



1FFFFFH 100000H0FFFFFH 080000H 07FFFFH

002000H

FLASH ROMINTERNAL ROM2

(ON BOARD)

FLASH ROMINTERNAL ROM1

SYSTEM BIOS( D { )

Fig. 3.8 The Memory Map of B-443



3.8 Thermal Head Drive/ Protection and History Control Circuit

VH1

GND2

VH3

GND4

VH5

GND6

/LAT7DI2

8

DI19

NC10

STB411

STB312

STB213

STB114

TM15

TM16

DO117

VDD18

CLK19

DO220

VH21

GND22

VH23

GND24

VH25

GND26

JP9

ROHM

DI

/LAT

CLK

VCC

C200.1u

R3720K

Z1

4.7V

A1

B2

CLR3 Q 4

Q13

Cext14

RCext15U12A

74HC123

R39150K

VCC

1213

U5F

74HC04

PH_HEAT

89

10U9C

74HC08

1112

13U9D

74HC08HISTORY

Q1

HSC945

Q2

2SJ177Q3

2SJ177

Q4

2SJ177Q5

2SJ177

VDD

R2110K

R4210

R2210K

R431K

PH

STROBE1

STROBE2

STROBE1

TMR443.9K

R48 1K

Vdet

1

2

3

J1

200DPI

STROBE1

300DPI

1

2

3

200DPI

300DPI

DIGITAL GND

89 U5D

74HC04

1

23U9A

74HC08/RESET

VH_POWER

C2210u\TANT

Z2

IN4745\16V

Analog GroundAnalog Ground

Analog Ground

C79

300p

C80220p

MOTOR_GND

VH1

VH2

VH3

VH4

DO5

LAT6

CLK7

VDD8

STB19

STB210

STB311

PGND12

PGND13

PGND14

PGND15

JP91A

ROHM_PD1

PGND1

PGND2

PGND3

PGND4

LGND5

TM6

TM7

STB48

STB59

STB610

DI11

VH12

VH13

VH14

VH15

JP92B

ROHM_PD1VH_POWERSTROBE1

VCC

R3820K

C21

0.1u

OPTIONAL CIRCUIT

WHEN OPTIONAL CIRCUIT DON'T USE. THEPIN2&3 OF Q2-Q5 MUST BE CONNECTTEDTOGETHER

PH_GND OLrYtaDIGITAL GNDOta

DIGITAL GNDOtaPVDDOLrYq

Fig. 3.9 Thermal Head Drive/ Protection and History Control Circuit

This is the thermal head drive/protection and history control circuit. CLK and /LAT are connected

to thermal head control clock and data latch respectively. PH controls the DC24V voltage of the

thermal head. When PH is LOW, the thermal head will be separated from 24V (VDD).

PH_HEAT determines whether to heat the thermal head or not. HISTORY determines whether

the history control is available or not. DI sends the printer data to the print head. TM is the

temperature/voltage sensor for thermal head. Vdet feeds back the voltage and compensates the

heat time for voltage accuracy when printing.



3.9 24V/5V Converter Circuit

SW 1

SWE 2

TC 3

GND 4Vref5VCC6Ipk7VDD8

U4

34063

R11

R2 1

R3

30KR410K

C5220p

C810u/35V

qqe

D11N5819

L2

330u

C51470u

C1147u/35V

L3

1u

+5V

R12 1

L23

BEAT

B1

DC JACK

+24V

C100.1u

C6

1500pFC91000u/35V

SW1

SW SPDT

R56470/2W

L14

CHOKE

D3

SR505

C82

0.01u

0.01u

L26

1

2

3

4

L4

COMM_CHOKE

Fig. 3.10 24V/5V Converter Circuit

Figure 3.10 is the DC-TO-DC (DC24V to DC 5V) converter circuit, which is a boost system

circuit structure. U4 is the DC-TO-DC converter IC, which converts voltage by using PWM

control mode. The output voltage is dependent on R3 and R4, and its value is derived by the

following formula:



3.10 Stepping Motor And DC Motor Driver/ Protection Circuit

MB1

T2

VM

M3

GN

D4

VC

C6

I17

PHASE8

I09

C10

VR

11

MA15

E16

VM

M,1

4

GN

DG

ND

GN

DU17

PBL3770A

MB1

T2

VM

M3

GN

D4

VC

C6

I17

PHASE8

I09

C10

VR

11

MA15

E16

VM

M,1

4

GN

DG

ND

GN

D

U18

PBL3770A

C55

820pC56820p

C57

820pC58820p

R5156K

R45

1K

R5256K

R46

1K

R141

R151

R161

R171

PHASE1

PHASE2

VCC

VCCVDD

VDD

L18

BEAD

L20

BEAD

C52

470u

C54

470u

C270.1u

C280.1u

MB1

T2

VM

M3

GN

D4

VC

C6

I17

PHASE8

I09

C10

VR

11

MA15

E16

VM

M,1

4

GN

DG

ND

GN

D

U19

PBL3770A

C59

820pC60820p

R5356K

R47

1KR181

R191

VCC

VDD

L19 BEAD

C53

470u

C290.1u

PHASE3DCMA

DCMB

Q6

TIF32C

R5468

R55

390

VDD

D5IN4002

CTSENS

R2310K

VCC

A9

B10

CLR11

Q12

Q5

Cext6

RCext7

U12B

74HC123

R40

150K

/RESET

VCC

1 16

9

GN

D8

U20A2003

2 15

9

GN

D8

U20B2003

3 14

9

GN

D8

U20C

2003

4 13

9

GN

D8

U20D2003

DIGITAL GND

MOTOR_GND

MOTOR_GNDMOTOR_GND

MOTOR_GND

MOTOR_GNDMOTOR_GND

D12

1N

4002

D13

1N

4002

D14

1N

4002

D15

1N

4002

I1I0DCM

CUTTER

A1

B2

CLR3

Q4

Q13

Cext14

RCext15

U13A

74HC123

C1210u

R41

150K

VCC

MOTOR

DIGITAL GND

1

2

3

4

5

6

RN6

10K 6PIN

1A12

1A24

1A36

1A48

2A111

2A213

2A315

2A417

1Y118

1Y216

1Y314

1Y412

2Y19

2Y27

2Y35

2Y43

1G1

2G19

U6

74LS244

C3010u\TANT

1234567

JP3

CUTTER&PEEL

DIGITAL_GND

PEEL

VCC

DIGITAL GND

MOTOR_GND

1

2

3

4

JP12

STEP MOTORL31 BEAD

L30BEADL29BEAD

L28BEADL27

BEAD

L7

BEAD

C780.01uF

C77

0.01uF

C73

0.01u

C74

0.01u

C76

0.01u

C75

0.01u

F2

FUSE2

F1

FUSE2

F3

FUSE2

D16

DSP

D17

DSP

MOTOR_GND

13,1

2,5

13,1

2,5

13,1

2,6

BUZZER

VCC

Fig. 3.11 Stepping Motor And DC Motor Driver/ Protection Circuit

This is the Stepping Motor and DC Motor Drive/ Protection Circuit. Connector JP12 sends the

pattern as shown in table1. The status of I0 & I1 determines the stepping motor power level, the

power level pattern is as shown in table2. Motor port is the protection pin. When it is at LOW

level, the power of the motor system will be closed. Power will be ON again when MOTOR pin is

the pulse of HIGH level. PHASE1 and PHASE2 determine the pattern of stepping motor drivecircuit. For example, the sequence of PHASE1/PHASE2 in full step mode is 0/0 0/1

1/1 1/0.

Step

Pin on JP121 2 3 4 PHASE

1 ON ON ON A2 ON ON /A3 ON ON ON /B4 ON ON B

Table1 Stepping Motor Pattern

MOTOR CURRENT I0 I1HIGH LEVEL 100% L LMEDIUM LEVEL 60% H LLOW LEVEL 20% L HZERO CURRENT 0% H HTable2 Stepping motor power pattern

The power of DC motor is on when DCM pin is at LOW level. PHASE3 determines the DC

motor rotation direction (forward or backward).



3.11 Communication (Serial & Parallel Port) Circuit

C1+1

V+2

C1-3

C2+4

C2-5

V-6

T2OUT7

R2IN8

R2OUT9

T2IN10

T1IN11

R1OUT12

R1IN13

T1OUT14

GN

D1

5V

CC

16

U21RS232

RX1

RX2TX1

TX2

C610.1u

C620.1u

C630.1u

C640.1u

L8BEAD

C1310u

L9 BEAD

L10BEADL11 BEAD

L12BEAD

CVCC

VCC

181716151413121110987654321

363534333231302928272625242322212019

JP14

CENTRONIC

CLK3

D2

SD

4C

D1

Q5

Q6

U22A74LS74

3 4

U11B

74LS14

R57

100C65220p

D03

Q02

D14

Q15

D27

Q26

D38

Q39

D413

Q412

D514

Q515

D617

Q616

D718

Q719

OE1

CLK11

U23

74LS374

12345678910

RN4

10KCVCC

C38

220p

C39

220p

C40

220p

C41

220p

C42

220p

C43

220p

C44

220p

C45

220p

R24 100R25 100R26 100R27 100R28 100R29 100R30 100R31 100

R33

100

R34

100

R35

100

R36

100

PE

/ERROR

SELECT

VCC

DO[0..7]DO[0..7]


CENTRONIC

INT

C710.1u

CGND

CGND

CGND

CGND

DIGITAL GND

DIGITAL GND

5 6

U11C

74LS14

8 9U11D

74LS14

10 11U11E

74LS14

12 13

U11F

74LS14

R32

100

594837261

JP13

DB9_1

R20

100

Fig. 3.12 RS-232 (Serial Port) Circuit

The RS-232 Circuit is for use with the externally connected personal computer and keyboard

unit. JP13 connects to PC serial port through the RS-232 cable. RxD is the data receive pin of

MCU. CTS is the Clear To Send of MCU, which sends the signal from the external device. TxD

is the data output pin of MCU. RTS is the Request To Send signal which MCU sends to the

external device.

The parallel port circuit is for use with the external personal computer parallel port connected

through the printer cable. When PCs strobe signal comes in, the printer responds the busy

status until it reads the data from parallel port. Printer will respond the error signal to PC

when it is in error status.



3.12 Cutter Drive Circuit

Q6

TIF32C

R5468

R55

390

+24V

D5IN4002

CTSENS

R2310K

+5V

A9

B10

CLR11 Q 12

Q 5

Cext6

RCext7U12B

74HC123

R40

150K

/RESET

+5V

1 16

9

GN

D8

U20A2003

2 15

9

GN

D8

U20B2003

3 14

9

GN

D8

U20C

2003

4 13

9

GN

D8

U20D2003

C3010u\TANT

1234567

JP3

CUTTER&PEEL

PEEL

+5V

D16

DSP

D17

DSP

CUTTER

Fig. 3.13 Cutter Drive Circuit

This is the cutter drive circuit. The RESET signal is 1 when the printer is turned on. CUTTER

controls the activation of the cutter. The cutter is activated when CUTTER signal is low. The

sensor of cutter sends the Hi-Low signal to MCU through CTSENS pin that detects the action

of cutter.



3.13 Mainboard Replacement

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel.

Fig. 3.14 Remove the front coverin the direction of the arrows

5. Remove the two screws and the metal cover.

Fig. 3.15 Remove the screwsand metal cover

Screws

Metal Cover



6. Release the cable tie and remove the peel-off sensor connector.

Fig. 3.16 Cable tie and peel-off sensor connector

7. Remove the screws on the lower left and lower right corners of main mechanism.

Fig. 3.17 Remove the screws in the lower left, lower

right corners of the main mechanism.

Cable Tie

Peel-Off SensorConnector

Cutter Connector



8. Remove the four screws of the internal label roll mount.

Fig. 3.18 Remove screws of the label roll mount

9. Move the mechanism about 5 mm in the label feed direction.10. Take out the internal label roll mount and remove the connector.

Fig. 3.19 Take out the internal label rollmount and remove the connector

11. Remove the screw of ground wire on the mainboard.12. Remove all connectors on the mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,

JP9, JP12)

Ground Wire

Push ButtonConnector



Connector DescriptionJP1 External button, LED connectorJP2 Ribbon sensor receiver connectorJP3 Cutter and Peel off sensor connectorJP4 Black mark sensor connectorJP5 Gap / ribbon transmit sensor connectorJP6 DC motor and encoder connectorJP7 TPH head up switch connectorJP8 Memory cartridge connectorJP9 TPH connectorJP12 Stepping motor connector

13. Take out the mechanism.14. Replace the mainboard.15. Reassemble the mechanism and internal label roll mount in the reverse procedures of the removal.



3.14 Flash memory Replacement

If files can not be stored in the FLASH memory or if the firmware can not be upgraded, the first

LED turns ON and OFF incessantly to indicate the Flash memory fails. Please follow the steps

below to replace the flash memory.

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel.5. Remove the two screws and the metal cover.6. Release the cable tie and remove the peel-off sensor connector.7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of main mechanism.9. Remove all four screws of the internal label roll mount.10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove the connector.12. Use an IC clamp to remove the FLASH memory.

Fig. 3.20 Remove Flash Memory with an IC clamp

Note: The notch of flash memory and mark on the socket must face the samedirection.

13. Install the new FLASH memory.14. Install the FLASH memory cartridge. Copy firmware into the new Flash memory cartridge.15. Reassemble the mechanism and internal label roll mount in the reverse procedures of the

removal.



3.15 Cutter, DC Motor, Stepping Motor Driver IC Replacement

Fig. 3.21 Driver IC Locations

If the DC motor (ribbon rewind spindle) rotates back and forth, please check the DC motor driver

IC, make sure it is firmly inserted in the IC socket and is not burned.

If the cutter does not work, please check that the software or program has been switched to the

cutter mode. If the cutter still does not function, please check the cutter driver IC, make sure it is

firmly inserted in the IC socket and is not burned.

The stepping motor driver IC is burned if the stepping motor makes noises but does not feed

labels when the FEED key is pressed. In this case, please replace with a new driver IC.

Use an IC clamp to remove the damaged IC.

SteppingMotor DriverIC

DC MotorDriver IC

FlashMemory

Cutter Driver IC



4. MECHANISM

4.1 Cutter Installation

1. Turn off the printer power.2. Open the top cover of the printer.3. Remove the printer front panel slowly and carefully. (Cf. Fig. 3.14)4. Remove the two screws and the metal cover. (Cf. Fig. 3.15)5. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)6. Remove the peel-off sensor connector. (Cf. Fig. 3.17)7. Plug in the cutter connector.8. Insert the right and left side flange of cutter into the slot.

Fig. 4.1 Cutter Installation

9. Fasten the cutter from the bottom of the printer with the provided screw.10. Make sure no screws or other parts are left in the printer.11. Reassemble the mechanism and internal label roll mount in the reverse procedures of the

removal.

Right FlangeLeft Flange



4.2 Print Head Replacement

1. Turn off the printer power.2. Remove the RS-232 cable and power cord.3. Open the top cover.4. Remove the ribbon and label roll.5. Open the print carriage.6. Remove the screw at the top front center of the mechanism, as shown.

Fig. 4.2 The Print Head Screw

7. Disconnect the print head cable.

Fig. 4.3 Printhead and the Cable

Print HeadConnector

Key of theConnector

Print HeadCable



Note: The key of connector must be positioned upward.Do not touch the elements of the print head.Do not disassemble the print head.

8. Tidy up the cable so that it does not protrude or interfere with the ribbon.9. Reassemble the removed parts in the reverse order of removal.



4.3 DC Motor Replacement

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel. (Cf. Fig. 3.14)5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of the main mechanism.9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove connector JP1. (Cf. Fig. 3.19)12. Remove the screw of ground wire on the mainboard.13. Remove all connectors on the mainboard.14. Take out the mechanism.15. Remove the cable tie.16. Remove the three screws on DC motor fixture.

Fig. 4.4 DC Motor Fixture

17. Remove the three screws used to fix DC motor from behind the fixture.18. Replace the DC motor and motor wires.19. Reassemble the removed parts in the reverse order of the removal.

DC MotorFixture



4.4 Ribbon Rewind Spindle Encoder Replacement

The encoder is installed on the gear box of DC motor, and is used to detect if the ribbon can be

unerringly rewound by the spindle. The encoder is connected to JP6 on the mainboard. Please

switch the printer to thermal transfer mode. The multi-meter is used to measure the voltage of

Pin2 (+5V). If the voltage changes continuously from 0 to 5 volts DC, the encoder is in condition.

Otherwise, please follow the steps below to replace the encoder PCB

1. Follow directions in Section 4.3 to remove DC motor and DC motor fixture.

Fig. 4.5 DC Motor Encoder

2. Remove the two flat tap screws and cable tie.3. Replace the Encoder PCB and Encoder Wires.4. Reassemble the removed parts in the reverse order of removal.

DC MotorEncoder



4.5 Felt Fabric Replacement

Felt Fabric is located in the ribbon supply spindle. It is used to tighten the ribbon to prevent it

from getting wrinkled during printing. If the ribbon does not stretch tight when label back feeds

during printing, please replace the felt to secure the best printing quality. Follow the steps below

to replace the felt fabric.

1. Follow the instructions in Section 4.3 to remove DC motor and DC motor fixture.2. Remove the E-ring and washer on ribbon supply spindle.

Fig. 4.6 Components of theRibbon Supply Spindle

3. Remove the spring cover, compression spring and spring holder.4. Remove the spring, felt clutch and felt fabric.5. Replace with a new felt.

Fig. 4.7 Side View of theRibbon Supply Spindle Assembly

E Ring

Washer

Spring Cover

CompressionSpring

Spring Holder

Spring

Felt Clutch

Felt Fabric



6. Reassemble the removed parts in the reverse order of removal.

Fig. 4.8 Front View of theRibbon Supply Spindle



4.6 Stepping Motor Replacement

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or Parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel. (Cf. Fig. 3.14)5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig.

3.17)9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)12. Remove the screw of ground wire on the mainboard.13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,

JP9, JP12)14. Take out the mechanism.15. Remove the two screws of the stepping motor.

Fig. 4.9 Stepping Motor

16. Replace the stepping motor, stepping motor wires, and reassemble the removed parts in thereverse order of removal.



4.7 Black Mark Sensor / Gap Sensor (Receiver) Replacement

Black mark sensor is reflection type sensor. It is connected to JP4 (3 pin connector). A multi-

meter is used to measure the signal of Pin2 to test if there is voltage variation when black mark

is detected. Before conducting the test, please invoke the BLINE command first. The printer will

switch from gap sensor to black mark sensor. If there is no voltage variation, please follow steps

below to replace the black mark sensor / gap sensor (receiver) PCB.

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel. (Cf. Fig. 3.14)5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig.

3.17)9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)12. Remove the screw of ground wire on the mainboard.13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,

JP9, JP12)14. Take out the mechanism.15. Remove one flat tap screws and black mark sensor PCB.

Fig. 4.10 Black Mark Sensor and Gap Receiver Sensor

16. Reassemble the removed parts in the reverse order of removal.



4.8 Ribbon Sensor (Receiver) Replacement

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel. (Cf. Fig. 3.14)5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig. 3.17)9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19`)12. Remove the screw of ground wire on the mainboard.13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,

JP9, JP12)14. Take out the mechanism.15. Remove the screws, springs and spring bushing on both sides of the mechanism.

Fig. 4.11 Ribbon Sensor Cover

Flat Tap Screw

Sensor Cover

Print Head



Fig. 4.12 Ribbon Sensor

Fig. 4.13 Spring Installation on Left Side and Right Side

Note:The left side spring and the right side spring are different in shape. The rightside spring has a straight end, whereas the left side spring has an end that iscurved 90 degrees.

16. The main mechanism is divided into upper mechanism and lower mechanism.17. The ribbon sensor (receiver) is located in the upper mechanism.18. Remove the screws on the ribbon sensor cover.19. Replace with a new ribbon sensor PCB.20. Reassemble the removed parts in the reverse order of removal.



4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement

1. Please follow the steps in Section 4.6 to separate the upper mechanism from the lowermechanism.

2. The ribbon sensor (transmitter) is located in the center of the lower mechanism.

Fig. 4.14 Ribbon Sensor (Transmitter)

3. Remove the two flat tap screws4. Remove the cable tie and sensor PCB.5. Replace with a new PCB. Reassemble the removed parts in the reverse order of removal.



4.10 Platen Replacement

1. Turn off the printer power.2. Remove the power cord and RS-232 and/or parallel port cable.3. Open the top cover of the printer.4. Remove the printer front panel. (Cf. Fig. 3.14)5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)7. Remove the screw on the PCB of peel-off and cutter connector.8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig. 3.17)9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)10. Move the mechanism in the label feed direction about 5 mm.11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)12. Remove the screw of ground wire on the mainboard.13. Remove all the connectors on the mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11,

JP7, JP9, JP12)14. Take out the mechanism.15. Remove the two screws, stepping motor and stepping motor cover. (Cf. Fig. 4.9)16. Remove the E ring and two gears.

Fig. 4.15 Location of E ring and Gears

17. Remove the E ring and the printer carriage release lever on the left side of the mechanism.(Fig. 4.16)

18. Remove the E ring and the printer carriage release lever arm. (Fig. 4.17)

Thermal Head

Gear #1

E Ring

Gear #2



Fig. 4.16 Printer carriage release lever and E ring

Fig. 4.17 Printer carriage release lever arm and E ring

19. Remove the teflon tube and metal rod. (Fig. 4.18)20. Remove the E ring, the left side and right side platen bushes. (Fig. 4.19)21. Remove the stripper plate.

Printer CarriageRelease Lever

Thermal Head

Bracket

E Ring

Teflon Tube

Printer CarriageRelease LeverArm

Stripper Plate

Platen Bush(Right Side)

E Ring



Fig. 4.18 Teflon tube and metal rod

Fig. 4.19 Remove E ring and platen bush

22. Move the platen a bit to the right of the mechanism, take out the platen.23. Replace the platen and reassemble the removed parts in the reverse order of removal.

Teflon Tube

E Ring

Platen Bush(Left Side)



4.11 Parts List

Cover and Panels

Ref.No. Part No. Description Remarks List Price

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

1-9

1-10

1-11

1-12

1-13

1-14

1-15

1-16

1-17

1-18

1-19

1-20

1-21

37-1403008-34

30-0130050-00

98-0130057-00

98-0181009-00

98-0181010-00

98-0181011-00

98-0181012-00

30-0130059-00

30-0130048-00

30-0130060-00

30-0180043-00

98-0180065-00

37-1403006-34

98-0180071-00

98-0180016-00

37-1402005-31

98-0130055-00

98-0130069-00

98-0180060-00

52-0300021-21

32-0130015-00

30-0130041-00

80-ULN2003-00

80-PBL3717-00

82-029C040-00

Screw, f3x8Memory Module Cover

Push Botton Box Assy

1 MB Memory Module

2 MB Memory Module

3 MB Memory Module

4 MB Memory Module

Label Roller (Hub shape: circular)

Label Roller (Hub shape: quadrangular)

Label Roller Fixed Tab

Label Roller Mount

Upper Cover Assy

Screw, f3x6 Tap4 Round+NiMain PCB-A Assy

PCB-I Assy

Screw, f2x5Front Cover Assy

Cutter Module

Lower Cover Assy

Screw, M3x6 Round + Ni

Hinge Shaft

Stopper

Cutter Driver IC

DC Motor, Stepping Motor Driver IC

Flash Memory

Option

Option

Option

Option



Ribbon Mechanism Assembly


2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

2-9

2-10

2-11

98-0130019-10

98-0180009-10

37-1403005-32

37-1403008-34

37-1203510-31

30-0130014-10

98-0180011-10

37-1502604-34

37-1201705-24

98-0180015-10

36-0180002-00

Ribbon Spindle Assy

Ribbon Mechanism Assy

Screw, f3x5 Tap4 Round + BlackScrew, f3x8Screw, f3.5x10 Tap2 Round + YellowRibbon Base Side Cover

DC motor Assy

Screw, M2.6x4 Round + Ni

Screw, f1.7x5 Tap2 Flat + NiPCB-F Assy (ribbon rewind DC motor)

Felt Fabric



Mechanism Upper Cover Assembly


3-1

3-2

3-3

3-4

3-5

3-6

3-7

3-8

3-9

3-10

3-11

3-12

98-0180069-00

37-1403008-34

37-1202612-22

37-1503006-34

37-1403015-32

37-1403508-52

98-0180012-00

37-1201705-24

72-0050003-00

64-0010011-00

32-0130041-20

37-1201703-32

Mechanism Upper Cover Assy

Screw, f3x8Screw, f2.6x12 Tap4Screw, M3x6 Round + Ni

Screw, f3x15 Tap4 Round + NiScrew, f3.5x8PCB-G Assy (Ribbon sensor)

Screw, f1.7x5 Tap2 Flat + NiFlat Cable

Thermal Head

TPH Head-Up Spring

Screw, f1.7x3



1112



Mechanism Lower Cover Assembly


4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-11

98-0180070-00

98-0180013-00

65-0010005-00

37-1403008-34

37-1403006-74

36-0130002-00

30-0130053-10

98-0180014-00

37-1201705-24

36-0130001-40

37-1503004-14

Mechanism Lower Cover Assy

PCB-D Assy (Gap/Ribbon Sensor)

Stepping Motor

Screw, f3x8Screw, f3x6 Tap4 Round/W + NiDamper

Printer Carriage Release Lever ( L)

PCB-E1 Assy

Screw, f1.7x5 Tap2 Flat + NiPlaten

Screw M3x4



Accessories


5-1

5-2

5-3

5-5

72-0010001-00

98-0130050-00

62-0130003-01

36-0130038-00

Parallel Port Cable

External Label Roll Mount Assy

Power Adapter

Print Head Cleaning Pen Option



5. TROUBLE SHOOTING

5.1 Error Messages

Syntax Error:The command format is incorrect. Check users manual to be sure.The serial port setting is incorrect. Check DIP switch and reset the printer.

Out of Range:Numeric input is too large to be processed.The input string is too long to be stored.The size of the text of bar code exceeds that of the label.

Download Error:The format of the downloaded file is incorrect.There is not enough memory to store the file.

Stack Overflow:Program contains too complex mathematical expressions. Divide into several expressions.There is too much nested routine.

Memory Error:Too many variables defined.

RS-232 Error:The serial port setting is incorrect.

File Not Found:Cannot open the file specified. Download the file again.

Type Mismatch:Variable type mismatch.

Gap Not Found:Cannot detect label edge. Calibrate the backing paper again.

Clock Access Error:Can not read from/write to the clock.



5.2 Trouble Shooting

Problems Solutions

1. Ribbon does not advance. Check the printing mode setting and reset theprinter.

2. Poor print quality. Clean the print head.Adjust the print density setting.

3. Only prints diagonal pattern in the self-test. Ribbon and paper are incompatible. Use a differenttype of ribbon.

4. Power indicator light does not illuminate. Check the connection of serial port cable.

5. On-line indicator light does not to illuminate.Check the DIP switch setting and reset the printer.Check that power cord is properly connected.

6. Error indicator remains illuminated. Out of paper or out of ribbon.

Check the DIP switch setting

Check the paper core, make sure it is installed onthe ribbon rewind spindle.

Press the FEED key. The error message will beprinted out on the print media or sent out throughRS-232 port.

If there is no problem with direct thermal printing,but error occurs in thermal transfer printing. Pleasecheck the encoder of the DC motor.



5.3 Calibrate the Gap Register

1. Install the label.2. Turn on the printer power while pressing the PAUSE button. The printer will calibrate the

transparency of the backing paper and adjust the gap register.

5.4 Self-test

1. Install the label.2. Turn on the printer power while pressing the FEED button, the printer will:

(1) Print head checking pattern.(2) Calibrate the label length.(3) Print internal settings.(4) Initiate self-test.(5) Enter dump mode.

5.5 Ram Clear

Press the PAUSE and FEED button simultaneously for more than 3 seconds. The printer will clearthe memory and reset the printer.Be sure to calibrate the gap register with blank label before printing.

5.6 Diagnosis Operation Procedure

When the power is turned on without any button pressed, self diagnosis is performed automatically totest the available memory. If any error occurs during this period, the ERR light will flash.

Do the self test and inspect the test pattern to check if the thermal head is available.



5.7 Testing Sensors

A. Checking Ribbon Sensor

Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to

PIN2 of JP2.

1. When ribbon is detected between TX and RX of the ribbon sensor, the measured voltage

should be 5 Vdc.

2. When ribbon is not detected between TX and RX of the ribbon sensor, the measured voltage

should be 0 Vdc.

The ribbon sensor is normal if the checking complies with the two cases above. Or else, the

ribbon sensor is out of order.

B. Checking DC Motor Encoder Sensor


PIN2 of JP6.

1. When gap of the gear box is detected by the DC motor encoder sensor, the measured

voltage should be 5 Vdc.

2. When gap of the gear box is not detected by the DC motor encoder sensor, the measured

voltage should be 0 Vdc.

The DC motor encoder sensor is normal if the checking complies with the two cases above. Or

else, the DC motor encoder sensor is out of order.

C. Checking Gap Sensor

Do gap calibration first by holding the Pause button and activating the printer power at the same

time. If the calibration result is correct, go on and check the gap sensor. Switch the multimeter to

the DC gear. Connect the black wire to DC GND, and the red wire to PIN2 of JP5. Load label on

the printer.

1. When gap (backing paper only) is detected between TX and RX of the gap sensor, the

measured voltage should be 0 Vdc.

2. When gap (backing paper only) is not detected between TX and RX of the gap sensor, the

measured voltage should be 5 Vdc.

The gap sensor is normal if the checking complies with the two cases above. Or else, the gap

sensor is out of order.



D. Checking Black Line Sensor


PIN2 of JP4. Load black line label on the printer.

1. When black line is detected by the black line sensor, the measured voltage should be 5 Vdc.

2. When black line is not detected by the black line sensor, the measured voltage should be 0

Vdc.

The black line sensor is normal if the checking complies with the two cases above. Or else, the

black line sensor is out of order.

E. Checking Peel Off Sensor


PIN6 of JP3.

1. When label is detected by the peel off sensor, the measured voltage should be 0 Vdc.

2. When label is not detected by the peel off sensor, the measured voltage should be 5 Vdc.

The peel off sensor is normal if the checking complies with the two cases above. Or else, the

peel off sensor is out of order.



5.8 Cleaning the Print Head

The printer should be cleaned regularly to retain high quality and optimum performance. The

greater the usage of the printer, the more frequent the cleaning.

1. Turn the power off2. Open the printer cover.3. Open the printer carriage by pulling up the release lever to the left of the front rubber roller.4. Remove the ribbon and label.5. Clean the print head element with a head cleaner pen.6. Clean the front rubber roller with a piece of alcohol moistened cloth.

Precaution

This service manual is intended for use by service technicians, and designed as a guide for repair& maintenance. The manual is intended to promote smooth service operations of the product inthe market place. It is not intended for any other purpose such as development or productspecifications. For questions regarding development or product specifications, please contactdirectly to the TAIWAN SEMICONDUCTOR.

This manual may be changed or revised without notice. If you find any misprints or omissions,please contact directly to the TAIWAN SEMICONDUCTOR promptly. (Facsimile No. +886-2-2912-2499)

TOSHIBA TEC and TAIWAN SEMICONDUCTOR cannot be held responsible for any trouble whichhave been caused by misprints or omissions.

Safety Summary

Personal safety in handling or maintaining the equipment is extremely important. Warnings andCautions necessary for safe handling are included in this manual. All warnings and cautionscontained in this manual and written inside or outside of the printer should be read and understoodbefore handling or maintaining the equipment.

Never modify the machine. Except for the addition of options as specifically provided for in theservice manual, change or modifications to the machine are not approved. Unauthorized changesor modifications may not comply with your country's safety standards.

Safety Precaution

Electrical equipment is dangerous. Electrical shock from such equipment can cause death. Neveroperate electrical equipment unless authorized to do so by a responsible authority.In emergency work on electrical equipment is authorized, be sure that it is performed in strictcompliance with approved safety regulations.

The following safety precautions will help to ensure proper use of the printer:

Turn off the printer before 1) opening the top cover for any reason, 2) attaching/detachingany cable and memory cards, and 3) changing the dip switch setting.

Disconnect the power cord whenever you are working inside the printer.

Keep your work environment static free.

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