Service manual

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Table Of Contents

Revision Table
- Key to Symbols
- Safety Precautions on Maintenance/Repair/Inspection
- Modular Connector
- CONTENTS
Introduction
Chapter 1
Features and General Specifications
- Features
- Hardware Configuration
- Main Unit Specifications
- Connectors
- Interface
- Buttons and Switches
- Panel LEDs
- Self-test
- Error Processing
  - Printer Operation When an Error Occurs
  - Data Receive Error
- Buffer Full Printing
- Detectors and Printing
- Hexadecimal Dump
  - Performing a Hexadecimal Dump
- Options
  - External Power Supply PS-170
Chapter 2
Mechanism Configuration and Operating Principles
- Printer Mechanism Operating Principles
- Ribbon Switch Mechanism Unit
  - Switching from Black to Red
  - Releasing from Red to Black
- Electrical Circuitry Operating Principles
  - Hardware Configuration
- Principles of Operation
- Printer Mechanism Driver Circuits
Chapter 3
Handling and Maintenance
- Handling Precautions
- Replacing the Paper Roll
- Replacing the Ribbon Cassette
- Removing Jammed Paper
- Using the Power Switch Cover
- Inspection and Maintenance
  - Maintenance Procedures
- Cleaning
- Lubricants
- Tool List
Chapter 4
Troubleshooting
- Self-test
- Troubleshooting Flowchart
- Troubleshooting Tables
- Error Types and Countermeasures
Chapter 5
Disassembly, Assembly, and Adjustment
- Small Part Specifications
- Disassembly
  - Removing the fuse
- Sub-assembly A
  - Paper feed frame unit assembly
- Main Assembly 1
  - Ribbon switch lever, ribbon release spring, ribbon release lever, ribbon intermediate gear, ribbo...
- Main Assembly 2
  - Tension plate assembly
- Main Assembly 3
  - Paper feed frame assembly
- Main Assembly 4
  - Carriage motor assembly
- Main Assembly 5
  - Carriage sub assembly
- Main Assembly 6
  - Carriage shaft assembly
- Main Assembly 7
  - Adjustment roller shaft holder assembly
- Main Assembly 8
  - Carriage guide shaft assembly
- Main Assembly 9
  - Belt tension spring assembly
- Main Assembly 10
  - Sensor assembly
- Main Assembly 11
  - Carriage motor heat sink assembly
- Main Assembly 12
  - Print head FPC assembly
- Main Assembly 13
  - Print head unit
- Main assembly 14
  - Left cover fixing plate and right cover fixing plate
- Main Assembly 15
  - Ribbon frame earth plate
- Main Assembly 16
  - Ribbon frame assembly, ribbon frame spring, and ribbon frame fixing plate
- Main Assembly 17
  - Thumb-screw and head cover
- Main Assembly 1 (Case Unit)
  - Lower cutter plate assembly
- Main Assembly 2 (Case Unit)
  - Upper plate assembly
- Main Assembly 3 (Case Unit)
  - Main circuit board assembly
- Main Assembly 4 (Case Unit)
  - Inserting the cables
- Main Assembly 5 (Case Unit)
  - Lower case assembly
- Main Assembly 6 (Case Unit)
  - Manual cutter assembly and auto-cutter fixing plate
- Main Assembly 7 (Case Unit)
  - Auto-cutter assembly
- Main Assembly 8 (Case Unit)
  - Paper roll receive rollers, upper case, guide roller, and switch panel assemblies
- Main Assembly 9 (Case Unit)
  - Interface circuit board assembly and connector plate
- Main Assembly 10 (Case Unit)
  - Lower plate, ROM cover, and rubber foot assembly
- Main Assembly 11 (Case Unit)
  - Main cover assembly
- Main Assembly 12 (Case Unit)
  - Near-end detector assembly (optional)
- Adjustment
  - Platen gap adjustment
  - Removing the print head unit
  - Removing the auto-cutter
  - Removing the main circuit board assembly
Appendix
- RS-485 Serial Interface
  - XON/XOFF Transmission Timing
  - Data Format When Using RS-485
- Parts Layout
Appendix
- Circuit Diagrams
- Printer Mechanism Unit Overall Exploded Diagram
- Case Unit Overall Exploded Diagram
- Case Unit Overall Exploded Diagram
- Printer Mechanism Unit Lubrication Points Diagram
- Case Unit Lubrication Points Diagram
Addendum 1
Main Circuit Board Types and Maintenance
- Changes
- Servicing Precautions
Addendum 2
Lower Plate Change and ROM Spacer Abolition
- Description of Change
- Servicing Precautions
Addendum 3
Auto-Cutter Release Tab Change
- Description of Change
- Assembly Procedure Change
- Spare Parts Supply Unit Change

Rev. B Appendix A-19

TM-U200 Series (Type B) Service Manual

Confidential

IEEE 1284 Parallel Interface Board

1 8

2 7

3 6

4 5

RM2

1 8

2 7

3 6

4 5

RM1

CEN0

CEN1

CEN2

CEN3

CEN4

1A1

1Y1

1A2

1Y2

1A3

1Y3

1A4

1Y4

2A1

2Y1

2A2

2Y2

2A3

2Y3

2A4

2Y4

RM11

RM12

+5V DD5V

CEN7..0

U11D

R14R13 R15

R16

+5V

+5v

DK 1

DK S

+24V

HOST_RTS

CTS

DET

RTS

CLKIN/DTR

CLKREQ

+5V

DK 2

DK G

DK P

+24V

(RES)

#25_RESET

DSR_RESET

#RESET

CN2

CEN_DIR

AFXT

CTS

1284ACT

C15

C14

R39R45 R46

+5V

P31/RXD

P32/SCLK

P33/TXD

P35/RD

P36/WR

P37/TO1/WAIT

P80/INT0

P81/INT1/TI2

NMI

CLK

P00/D0

P01/D1

P02/D2

P03/D3

P04/D4

P05/D5

P06/D6

P07/D7

VSS

VCC

P27/A15

P26/A14

P25/A13

P24/A12

P23/A11

P22/A10

P21/ A9

P20/ A8

P17/ A7

P16/ A6

P15/ A5

P14/ A4

P13/ A3

P12/ A2

P11/ A1

P10/ A0

RESET

CEN5

CEN6

CEN7

123

456

R40 R42 R43

R48

C23

C26

R49

R51

+5V

C19

C18

R11

R50

C20 C21 C22

C24 C25

DD5V

-STB/HOSTCLK

DATA1

DATA2

DATA3

DATA4

DATA5

DATA6

DATA7

DATA8

-ACK/PTRCLK

BUSY/PTRBUSY/37

PE/ACKDATREQ/26

SLCT/XFLAG/15

-AFXT/HOSTBUSY

GND

LOGIC-H

GND

SHELL

GND

-INIT

-ERR/-DTVAIL/04

GND

DK STATUS

+5V

-SELIN/1284ACT

CN1

R27

R28

R29

R30

R31

R32

C29 C30 C31

R36

C17

DD5V

123

456

U5A

CLK

1A1

1Y1

1A2

1Y2

1A3

1Y3

1A4

1Y4

2A1

2Y1

2A2

2Y2

2A3

2Y3

2A4

2Y4

U10

C27 C28

+5V

BS_CLR

S_BUSY

ACK

DK_STAT

ERR

SLCT

RTS

H_BUSY

LOGIC-H

C90M00NB

CEN0

CEN1

CEN2

CEN3

CEN4

CEN5

CEN6

CEN7

C10

C11

R10

C16

U1 U5U9 U10 U11

CU1 CU9 CU10 CU11 CU5

+5VDD5V DD5V DD5V DD5V

U5B

U11A

U11B

U11C

CU7

+5V

R12

R24

R25

R26

C32 C33

R54 R53 R52

R23