Epson TM-U675, TM-U675P Service manual

Confidential

Service manual

TM-U675/U675P

(with MICR)

Issued Date 199 , ,

Issued by

EPSON

English

401093600

Confidential

TM-U675/675P (with MICR) Service Manual

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or any consumable products other than those designated as Original EPSON Products or EPSON Approved
Products by Seiko Epson Corporation.

®

EPSON

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

Rev. A i

Confidential

Contents

Confidentiality Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

For Safe Repair and Maintenance Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Safety Precautions on Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Safety Precautions on Maintenance/Repair/Inspection . . . . . . . . . . . . . . . . . vii

Note on Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

Modular Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Aim of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Manual Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Chapter 1

Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Diagnosing Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Printer Mechanism Power on Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Opening and Closing the Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Detecting the Head Carriage Home Position . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Starting and Stopping Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Printing Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Ending the Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

MICR Reader Test (Only with Printers that Have a MICR Unit.) . . . . . . . . . . 1-7

Troubleshooting Using the ERROR LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Test Points on the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Test Points on the Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Power Supply Line Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Locations of the Main Elements on the Main Circuit Board Unit . . . . . . . . . . . . . . 1-15

Procedures for Replacing the Print Head Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Removing Paper Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Using the Release Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Opening the Clamshell Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Detector Functions and Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Chapter 2

Before Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

About this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Titles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Assembling the Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Pre-assembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Assembly of the Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38

Assembling the TM-U675 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73

Pre-assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73

Assembly of the TM-U675 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75

Troubleshooting

Assembly and Disassembly

Chapter 3

Before Making Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

The Purpose of Adjusting and Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Phase Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Adjusting the Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Setting Threshold Values for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Adjusting and Setting

ii Rev. A

Confidential

TM-U675/675P (with MICR) Service Manual

Appendix A

Appendix B

Maintenance and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

MICR Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Cleaning Sheet Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Procedures for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Appendix C

Connecting to the Host PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Connecting the Drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Connecting to a Direct Connection Display Module . . . . . . . . . . . . . . . . . . . . . . . . C-3

Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4

Appendix D

Component Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Outline of Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Printing Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Detection Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7

Roll Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15

Slip Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-25

Validation Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29

Ribbon Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29

MICR Mechanism (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-31

Outline of Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34

Connection of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34

Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-35

Memory Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36

Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-37

CPU and Peripheral Logic Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-39

Slip Mechanism Drive Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-50

Input Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-60

Control Panel Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-63

Malfunction Protective Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-64

Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-65

Important Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-66

DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67

Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67

Parallel Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-69

Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-70

Outline of Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-71

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-71

Printer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-72

MICR Reader (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-74

Overall Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-75

Interface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-76

Service Tools and Lubricants

Maintenance

Installation

Product Overview

Appendix E

Alphanumeric List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1

Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9

Parts List

Rev. A iii

Confidential

Appendix F

TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1

Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2

Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4

Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5

Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6

PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8

Appendix G

TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1

Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2

Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3

Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4

Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-5

Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6

PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7

MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-8

Appendix H

Main Circuit Board Assembly (Outline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-1

Main Circuit Board Assembly (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-2

Main Circuit Board Assembly (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-3

Main Circuit Board Assembly (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-4

Main Circuit Board Assembly (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-5

Main Circuit Board Assembly (MICR I/F Block) . . . . . . . . . . . . . . . . . . . . . . . H-6

Main Circuit Board Assembly (Memory Block) . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-7

RS-232 I/F Circuit Board Assembly (UB-S01) Circuit Diagram . . . . . . . . . . . . . . . H-8

Parallel I/F Circuit Board Assembly (UB-P02) Circuit Diagram . . . . . . . . . . . . . . H-9

RS-485 I/F Circuit Board Assembly (UB-S02) Circuit Diagram . . . . . . . . . . . . . . . H-10

Exploded Diagrams

General Lubrication Point Diagrams

Circuit Board Unit Circuit Diagrams

Appendix I

Using the Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1

Opening the Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2

Installing or Replacing the Paper Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2

Removing paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5

Installing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7

Inserting Slip Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9

Inserting Validaton Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9

Reading MICR Characters On Personal Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-10

Adjusting the Roll Paper Near End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11

Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

PAPER OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

SLIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

Control Panel Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12

FEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13

RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13

Appendix J

Appendix K

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

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

Printer Handling

Screw Types

Parts Layout

iv Rev. A

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RS-232 I/F Circuit Board Assembly (UB-S01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3

Parallel I/F Circuit Board Assembly (UB-P02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3

RS-485 I/F Circuit Board Assembly (UB-S02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-3

TM-U675/675P (with MICR) Service Manual

Rev. A v

Confidential

For Safe Repair and Maintenance Work

Key to Symbols

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

WARNING:

You must follow warnings carefully to avoid serious bodily injury.

CAUTION:

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

Note:

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

Safety Precautions on Handling

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

WARNING:

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

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

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

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

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

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

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

vi Rev. A

Confidential

Always supply power directly from a standard domestic power outlet.

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

Do not modify or attempt to repair the cord.

Do not place any object on top of the cord.

Avoid excessive bending, twisting, and pulling.

Do not place cord near heating equipment.

Check that the plug is clean before plugging it in.

Be sure to push the prongs all the way in.

TM-U675/675P (with MICR) Service Manual

CAUTION:

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

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

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

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

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

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

Safety Precautions on Maintenance/Repair/Inspection

WARNING:

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

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

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

Rev. A vii

Confidential

CAUTION:

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

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

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

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

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

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

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

Note on Disposal

Note:

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

Modular Connector

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

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

viii Rev. A

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TM-U675/675P (with MICR) Service Manual

About This Manual

Aim of the Manual

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

Manual Content

The manual is made up of the following sections:

Chapter 1 Troubleshooting

Chapter 2 Assembly and Disassembly

Chapter 3 Adjusting and Setting

Appendix A Service Tools and
Lubricants

Appendix B Maintenance

Appendix C Installation

Appendix D Product Overview

Appendix E Parts List

Appendix F Exploded Diagrams

Appendix G General Lubrication
Point Diagrams

Describes troubleshooting procedures (specific
problems and remedies)

Describes product assembly and disassembly

Describes product adjustment and setting
procedures

Describes tools and lubricants required to
perform maintenance and repair

Describes required procedures to perform
maintenance and inspection

Describes installation procedures

Provides reference information for maintenance
and inspection

Contains a list of spare parts

Disassembly diagrams for the product

Lubrication point diagrams for this product

Appendix H Circuit Board Unit Circuit
Diagrams

Appendix I Printer Handling

Appendix J Screw types

Appendix K Parts layout

Rev. A ix

Circuit diagrams for the product

Describes required handling procedures when
performing maintenance and repair

Describes screw types

Describes parts layout

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x Rev. A

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TM-U675/U675P (with MICR) Service Manual

Chapter 1

Troubleshooting

Before Servicing

"Precautions for Safety" (pages vi to viii) at the beginning of this manual provides precautions
you should observe to perform work safely and the necessary information to service this
product safely. Always read that information before starting your work.

Diagnosing Failures

Use one of the following methods to diagnose the areas where failures occurred.

❏ See Table 1-1 for diagnosing areas where failures occurred by the symptom of the problem.
❏ See Table 1-2 on page 1-9 for diagnosing areas where failures occurred from the ERROR LED

code.

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

Note:

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

Symptoms and Solutions

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

Table1-1 Symptoms and Checkpoints.

Symptom Checkpoints (by Priority)

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

There are missing dots in the print. 1. Replace the print head unit. (See page 1-16)

The print is thin. 1. Replace the ribbon cassette. (See page I-7)

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

2. Check the main circuit board unit. (See page 1-13)

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

4. Replace the I/F circuit board. (See page 2-94)

2. Replace the main circuit board unit. (See page 2-75)

2. Proceed to “Ribbon won’t feed” below.

Rev. A Troubleshooting 1-1

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Table1-1 Symptoms and Checkpoints.

Symptom Checkpoints (by Priority)

Ribbon won’t feed. 1. Replace the ribbon cassette. (See page I-7)

2. Check sprocket and gears for paper particles.

3. Check the carriage motor and gears. (See page 1-11)

4. Replace the main circuit board. (See page 2-75)

Unevenness occurs in the concentration of
the print.

There is ink smudging on the print surface. 1. Check for paper residue around the print head unit.

Paper jams Remove the jammed paper by following the directions in

Roll paper feed failure 1. Check that the roll paper is inserted correctly. (See page I-2)

Slip paper/validation paper feed failure 1. Check that the slip paper/validation paper is inserted correctly.

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

1. Replace the ribbon cassette. (See page I-7)

2. Adjust the platen gap. (See page 3-9)

2. Adjust the platen gap. (See page 3-9)

“Removing Paper Jams” on page 1-20.

2. Check the paper feed motor. (See page 1-11)

3. Check the J/S change solenoid. (See page 1-11)

4. Replace the main circuit board. (See page 2-75)

(See page I-9)

2. Check the paper feed motor. (See page 1-11)

3. Check the J/S change solenoid. (See page 1-11)

4. Replace the main circuit board. (See page 2-75)

2. Check that the take-up assembly is installed correctly into the
printer. (See page I-2)

3. Check that the take-up belt is attached correctly.

(See page 2-87)

4. Check the paper feed motor. (See page 1-11)

5. Check the J/S change solenoid. (See page 1-11)

6. Replace the main circuit board. (See page 2-75)

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

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

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

2. Replace the slip B. O. F. detector assembly. (See page 2-45/2-

46)

3. Replace the slip T. O. F. detector assembly. (See page 2-61)

4. Replace the main circuit board. (See page 2-75)

1. Clean away dirt around the validation detector assembly. (See

page B-2)

2. Replace the validation detector assembly. (See page 2-45/2-

46)

3. Replace the main circuit board. (See page 2-75)

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TM-U675/U675P (with MICR) Service Manual

Table1-1 Symptoms and Checkpoints.

Symptom Checkpoints (by Priority)

Roll paper semi-auto loading paper feed
failure

Drawer kick operation failure 1. Replace the main circuit board. (See page 2-75)

Display module display failure 1. Check that the unit is a serial model. (The display module will

1. Check that the roll paper is inserted correctly. (See page I-2)

2. Remove paper residue and dirt from the inside the paper feed
frame assembly.

3. Check the paper feed motor. (See page 1-11)

4. Check the J/S change solenoid. (See page 1-11)

5. Replace the main circuit board. (See page 2-75)

not work on parallel models.)

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

3. Check fuse F3 on the main circuit board. (See page 1-15)

4. Replace the main circuit board. (See page 2-75)

MICR reading failure 1. Clean the MICR head. (See page B-3)

Missing characters/misprinted characters/
font breakdown

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

2. Replace the MICR head. (See page 2-8)

3. Replace the MICR fixing and MICR fixing sheet.

(See page 2-9)

4. Replace the MICR solenoid. (See page 2-11)

5. Replace the main circuit board. (See page 2-75)

1. Check the settings of the DIP switches. (See page D-67)

2. Replace the interface cable. (See page C-1)

1. Close the front cover or roll paper cover (rear cover).

2. Replace with new roll paper. (See page I-2)

Rev. A Troubleshooting 1-3

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Printer Mechanism Power on Checks

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

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

This section describes the items that you can check visually.

Opening and Closing the Platen

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

check for the platen open and
close operation

Figure 1-1 Opening and closing the platen

Detecting the Head Carriage Home Position

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

check for head carriage
movement

Figure 1-2 Detecting the head carriage home position

1-4 Troubleshooting Rev. A

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Feeding Roll Paper

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

check for paper feed

TM-U675/U675P (with MICR) Service Manual

Figure 1-3 Feeding roll paper

Rev. A Troubleshooting 1-5

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Starting and Stopping Self Tests

Printing Tests

Starting the Tests

❏ Roll paper self test:

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

❏ Slip paper self test:

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

❏ Validation paper self test:

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

Test Wait Mode

❏ Roll paper self test:

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

❏ Slip paper self test:

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

❏ Validation paper self test:

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

Ending the Test

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

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TM-U675/U675P (with MICR) Service Manual

MICR Reader Test (Only with Printers that Have a MICR Unit.)

1. Load the roll paper in the printer.

2. Turn off the power supply to the printer.

3. Open the roll paper cover.

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

5. Press the RELEASE button seven times.

6. Close the roll paper cover.

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

**** RECOGNITION MODE ****

Please set check.

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

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

<Example Printing> With E13B Font Check Paper

??????????? ?? ?? ?? ?? ????? ????
T012345678T 90 12 34 56 78900 1234

Data that was read

(lower line).

Rev. A Troubleshooting 1-7

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<Example Printing> With CMC7 Font Check Paper

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

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

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

Data that was read
(lower line).

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TM-U675/U675P (with MICR) Service Manual

Troubleshooting Using the ERROR LED

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

Table1-2 Error causes and solutions

Type of Error and ERROR LED Pattern Explanation

Carriage home position detection
error

Carriage out-of-step error There is no carriage

The head carriage
home position was
not correctly
detected.

detector output
even when the
carriage is
instructed to move.

Solutions
(Listed in order you should use to check printer.)

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

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

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

21.)

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

2. Check the rotary encoder on the carriage motor
gear used to detect carriage position (The rotary
encoder is on the intermediate circuit board
assembly. You need to disassemble the
intermediate circuit board assembly to check the
encoder. To remove the intermediate circuit
board assembly, see page 2-21.)

Slip eject error The slip paper was

not ejected
normally.

Roll paper cover open error The roll paper cover

(rear cover) was
detected as open
when printing.

Memory or gate array R/W error The R/W check did

not operate
properly for the
memory or the
gate array.

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

1. Look into the printer from the left side to check for

a paper jam in the slip paper transport path.

2. Check the paper feed motor. (See page 1-11.)

If the motor is shorted, replace it along with the
main board.

3. Try installing a new main circuit board unit to see if

the printer is fixed. (See page 2-75.)

Close the roll paper cover (rear cover).

Replace the main circuit board unit to see if the
printer is repaired. (See page 2-75.)

Rev. A Troubleshooting 1-9

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Table1-2 Error causes and solutions

Type of Error and ERROR LED Pattern Explanation

High voltage error The power supply

voltage is high.

Solutions
(Listed in order you should use to check printer.)

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

Low voltage error The power supply

CPU execution error An abnormal CPU

Drive circuit error One of the

Head high temperature error/roll
paper error

voltage is low

operation was
detected, or the I/F
board is
disconnected.

following was
detected.

❏

Print head
thermistor
detection error

❏

Lever drive motor
assembly error

One of the
following problems
has occurred.

❏

The roll paper
has been
inserted into the
path wrong.

❏

The print head
temperature is
high.

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

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

2. Replace the main circuit board unit to see if the
printer is repaired. (See page 2-75.)

1. Check if the printer is repaired after replacing the
print head unit. (See page 1-16.)

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

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

61)

4. Check if the printer is repaired after replacing the
main circuit board unit. (See page 2-75)

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

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

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TM-U675/U675P (with MICR) Service Manual

Test Points on the Printer Mechanism

This section shows how to test the motor and the coils.

Table1-3 Test points on the printer mechanism

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

Mechanism
assembly
(M-U675)

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

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

Carriage motor 4 phase stepping

Lever drive
motor assembly

Paper feed
motor

J/S change
solenoid

Coil • Form stopper

Coil • Platen open

motor

DC brush motor • Form stopper

4 phase stepping
motor

Coil Change of

operation

• Slip paper roller
(sub) operation

and close.

• Cylindrical
printer platen
open and close

Head carriage
drive

operation

• Slip paper roller
(sub) operation

• Platen open
and close

• Endorsement
printer platen
open and close

Slip paper feed Remove the cable

journal paper
drive/slip paper
drive.

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

Remove the cable
connector
connected to
CN30 on the main
circuit board unit
and test between
pin 26 and pin 28.

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

Remove the cable
connector
connected to
CN30 on the main
circuit board unit
and test between
pin 29 and pin 30.

connector
connected to
CN30 on the main
circuit board unit
and test between
pin 17 and pin 18
and between
pin 19 and pin 20.

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

Approx. 70 Ω

Approx. 70 Ω

Approx. 4.5 Ω (per
1 phase)

The line must be
continuous.

Approx. 8 Ω (per 1
phase)

Approx. 45 Ω

Rev. A Troubleshooting 1-11

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Table1-3 Test points on the printer mechanism

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

Mechanism
assembly
(M-U675)

MICR solenoid Coil MICR hold drive Remove the cable

connector
connected to
CN27 on the main
circuit board unit
and test between
pin 1 and pin 2 .

Approx. 28.8 Ω

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TM-U675/U675P (with MICR) Service Manual

Test Points on the Main Circuit Board Unit

Power Supply Line Check

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

Table1-4 Checking the power supply line

Step
# Type of Voltage

1 Voltage input

from the power
supply

2 Voltage input

from the power
supply

Location of
Measurement

CN29, pin 1 Output when

U11, pin 1 Output when

Condition of
Measurement

the power
supply is ON.

the power
supply is ON.

Normal
Value Presumed Cause of the Error

24 V ± 10 % It is possible that the problem is pre-

arcing of the F1 fuse. The fuse may
have pre-arced because of an
unusual input circuit.

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

24 V ± 10 % It is possible that the problem is pre-

arcing of the R3 fuse. The fuse may
have pre-arced because of a
problem in the logic power supply
circuit or because of a VCC over­voltage.

3 Logic voltage

(VCC)

4 Logic voltage

(VCC-PWR)

5 Logic voltage

(VCC-PWR2)

VCC pad
(near L2)

VCC-PWR pad
(near U14,
pin 40)

U19, pin 8
potential

Output when
the power
supply is ON.

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

Output when
Q60 (C) is "0."
(24V SW2="H")

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

5 V ± 5 % It is possible that the logic power

supply circuit has malfunctioned.

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

5 V ± 5 % The logic power supply circuit or Q44

could have malfunctioned.

5 V ± 5 % The logic power supply circuit or Q59

could have malfunctioned.

Rev. A Troubleshooting 1-13

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Table1-4 Checking the power supply line

Step
# Type of Voltage

6 Logic voltage

(VCC_SEN)

7 Mechanism

voltage
(24VA)

8 Mechanism

voltage
(24 VB)

9 Mechanism

voltage
(24C)

Location of
Measurement

CN30, pin 5
potential

Located near
Q17 drain

Located near
Q7 drain

Located near
Q29 base

Condition of
Measurement

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

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

Only output
continuously
when power
supply unit is
connected.

Output when
Q46 (C) is "0."
(24V SW1="H")

Normal
Value Presumed Cause of the Error

5 V ± 5 % The logic power supply circuit or Q44

could have malfunctioned.

24 V ± 10 % Q17 could have malfunctioned.

24 V ± 10 % TH1 could have malfunctioned.

24 V ± 10 % It is possible that the problem is pre-

arcing of the F2 fuse. The fuse may
have pre-arced because of a defect
in the 24V line circuit elements.

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

1-14 Troubleshooting Rev. A

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TM-U675/U675P (with MICR) Service Manual

Locations of the Main Elements on the Main Circuit Board Unit

The following shows the locations of the main elements on the main circuit board unit.

Fuse (F3)

Fuse (F1)

CPU (U3)

Gate array (U30)
*under the
memory board

Carriage motor
controller (U14)

Fuse (F2)

Memory board

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

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

Impact dot head
drivers (QM3)

Impact dot head
drivers (QM6)

Slip paper feed motor
controller (U17)

*Rear side

Fuse (F4)
Fuse (R3)

Rev. A Troubleshooting 1-15

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Procedures for Replacing the Print Head Unit

This section explains how to replace the dot impact print head.

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

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

Figure 1-5 Removing the ribbon cartridge

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

Figure 1-6 Pulling the cable connector out

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

Figure 1-7 Arranging the cable wires

1-16 Troubleshooting Rev. A

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TM-U675/U675P (with MICR) Service Manual

4. Remove the two screws and remove the carriage cover frame assembly.

screw

screw

Figure 1-8 Removing the carriage cover frame assembly

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

tooth

nib

Figure 1-9 Tooth and nib

Rev. A Troubleshooting 1-17

Confidential

5. Move the head carriage to the right side and remove the print head unit FPC from the
connector.

Figure 1-10 Removing the print head unit FPC

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

Figure 1-11 Removing the print head unit

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

Two nibsSlit

Figure 1-12 Slit and two nibs

1-18 Troubleshooting Rev. A

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7. Remove the nose guide from the print head unit.

nose guide

Figure 1-13 Removing the nose guide

8. To reinstall the print head, reverse the procedures you used to remove it.

TM-U675/U675P (with MICR) Service Manual

Rev. A Troubleshooting 1-19

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Removing Paper Jams

Use one of the following methods to remove paper jams.

Using the Release Lever

1. Open the roll paper cover.

2. Remove the paper while pushing on the release lever.

Opening the Clamshell Mechanism

1. Turn OFF the power supply to the printer.

2. Open the roll paper cover.

release lever

Figure 1-14

1-20 Troubleshooting Rev. A

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

Levers

TM-U675/U675P (with MICR) Service Manual

Figure 1-15

4. Remove the paper. Close the clamshell mechanism after removing the paper. Push on the
clamshell mechanism until you hear a clicking sound.

Rev. A Troubleshooting 1-21

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Detector Functions and Positions

The following shows the positions and the functions of the detectors.

Table1-5 Detectors and Functions

Detector Function

H. P. detector assembly Printer initial setting (home position)

Carriage detector Detects head carriage misoperation

Slip B. O. F. detector assembly Detects the presence of slip paper.

Slip T. O. F. detector assembly Detects the presence of slip paper.

Paper ejection detector assembly Detects the presence of slip paper.

Paper end detector assembly Detects the presence of roll paper.

Near end detector mechanism
(micro switch)

Validation detector assembly Detects the presence of validation paper.

Lever motor T. P. detector assembly Detects the timing signal of the lever drive motor

Front cover detector assembly Detects the open/close status of the front cover.

Rear cover detector assembly Detects the open/close status of the roll paper

Detects the near end of roll paper.

assembly.

cover (rear cover).

Lever motor T.P. detector
assembly

H. P. detector
assembly

N.E.detector(Micro switch)

Paper end detector assembly

Rear cover detector assembly

Paper ejection detector assembly

Front cover detector assembly

Validation detector assembly

Slip T .O .F. detector
assembly

Carriage detector
assembly

Slip B.O.F. detector
assembly

Figure 1-16

1-22 Troubleshooting Rev. A

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TM-U675/U675P (with MICR) Service Manual

Chapter 2

Assembly and Disassembly

Before Assembly and Disassembly

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

CAUTION:

❏ Always remove the power supply unit from the printer before working.
❏ Power is flowing in the internal circuit board even if you turn the printer off with the power

supply switch. You can damage the printer if you work with the power supply still
attached.

❏ Remove all peripheral equipment connected to the printer before starting your work.
❏ Do not perform any work that is not described in this chapter. Doing so can result in injuries

or damage to the printer.

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

About this Chapter

Titles

This chapter uses titles for important parts and blocks (units), not for all parts (service parts).

Procedures

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

Assembly is organized into "Assembling the Mechanism" and "Assembling the TM-U675." Each
section is divided into "Pre-assembly" and "Assembly."

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

Refer to the "General Disassembly Drawings" during assembly to check the shapes and
attachment positions of the parts while you are working. Refer to "General Lubrication
Drawings" when you are lubricating.

Rev. A Assembly and Disassembly 2-1

Confidential

Quick Reference

This Quick Reference directs you to key areas of this chapter. For a complete listing of topics, see
the Contents at the front of this manual.

Assembling the Mechanism page 2-3
Pre-assembly Procedures

Assembly of the Mechanism page 2-38

Assembling the TM-U675 page 2-73
Pre-assembly Procedures

Assembly of the TM-U675 page 2-75

2-2 Assembly and Disassembly Rev. A

Confidential

Assembling the Mechanism

Pre-assembly Procedures

Pre-assembly of the Validation Detector Assembly

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

Note:

Check that the soldering is secure.

697 Nylon clip

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

Figure 2-1

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

2. Solder lead wires C, D, E to the slip B. O. F circuit board.

TM-U675/U675P (with MICR) Service Manual

Note:

Check that the soldering is secure.

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

606 Slip insertion detector holder

696 Slip B.O.F. detector assembly

742 Lead wire (type C)

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

Figure 2-2

Rev. A Assembly and Disassembly 2-3

Confidential

Pre-assembly of the Lever Drive Coil Assembly

1. Attach coil lever drive A, B to the paper feed core. The rack for lever drive coil (type A, B)
should face upward. Check the direction for attachment.

2. Fasten the paper feed trigger attraction plate to the coil lever drive coil (type A, B).

3. Hook paper feed trigger claw spring onto the paper feed core and paper feed trigger
attraction plate. One side of paper feed trigger claw spring is single and the other side is
double. Attach the double side onto the paper feed trigger attraction plate.

4. Lubricate the area contacting the trigger attraction plate coil lever and the area contacting
the paper feed core (eight places) .

G-36

Paper feed trigger attraction plate

621

Lever drive coil (type A)

731

Paper feed trigger claw spring

732

G-36

732

Paper feed trigger attraction plate

G-36

622

Lever drive coil (type B)

731

Paper feed trigger claw spring

695

Lever coil mounting plate sub assembly

Figure 2-3

2-4 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

Pre-assembly of the Paper Feed Motor

Note:

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

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

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

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

B-5 Motor shield cover

Screws (C.C.S-tite, 2.5X5)

725

B-3

Motor shield spacer

739

Paper feed motor

B-4

Motor shield case

726

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

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

Figure 2-4

Rev. A Assembly and Disassembly 2-5

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Pre-assembly of the J/S Change Solenoid Assembly

1. Attach the J/S change solenoid to the J/S solenoid mounting plate.

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

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

J/S change spring

651

Screw (C.C., 2X3)

J/S solenoid mounting plate

G-36

G-36

650 J/S change lever

716

774

Figure 2-5

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

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

Note:

Check that the soldering is secure.

703 Slip T.O.F. detector assembly

748 Lead wire (type I)
749 Lead wire (type J)
750 Lead wire (type K)

727

J/S change solenoid

Figure 2-6

2-6 Assembly and Disassembly Rev. A

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Pre-assembly of the Lever Motor T. P. Detector Assembly

1. Solder lead wires F, G, H to the lever motor T. P. detector circuit board.

Note:

Check that the soldering is secure.

704 Lever motor T.P. detector assembly

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

Figure 2-7

TM-U675/U675P (with MICR) Service Manual

Rev. A Assembly and Disassembly 2-7

Confidential

Pre-assembly of the MICR Unit

Note:

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

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

Note:

Check that the soldering is secure.

2. Align the MICR head assembly to the MICR frame and attach with the nib.

B-7 MICR assembly

MICR connector assembly

B-11

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

B-18

B-17 MICR frame assembly

Figure 2-8

2-8 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

3. Affix the MICR fixing sheet to the MICR fixing sub assembly. Set the MICR sheet holder on
the MICR fixing sub assembly nib and affix so that the sheet does not protrude from the sub­unit.

4. Attach the MICR fixing sub assembly to the MICR lever. The nib on the MICR fixing sub
assembly should fit into the MICR groove.

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

B-12 MICR lever

B-2 E-ring (1.2)

B-1 MICR roller shaft

B-16 MICR fixing sheet

B-13 MICR fixing

Figure 2-9

Rev. A Assembly and Disassembly 2-9

Confidential

6. Insert the MICR lever guide shaft, starting with the end with the smaller diameter, into the
MICR frame assembly (two pcs.).

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

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

G-47

Figure 2-10

G-47

2-10 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

9. Fit the MICR solenoid into the MICR case.

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

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

Note:

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

B-9 MICR lever fixing plate

B-19

Screws (C.P.(S), 2.6X8)

B-8 MICR case

B-14 MICR solenoid

Figure 2-11

Rev. A Assembly and Disassembly 2-11

Confidential

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

13. Attach the MICR lever spring on the rack.

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

15. Insert the MICR shield cover (type A) into the groove in the MICR head assembly.

16. Attach the cable.

B-10 MICR shield cover (type A)

B-2 E-ring (1.2)

MICR lever spring

B-15

B-1 MICR roller shaft

Figure 2-12

2-12 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

Pre-assembly of the Carriage Frame Unit

1. Lubricate the carriage drive pulley shaft.

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

3. Lubricate the carriage drive pulley.

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

720

E-ring (2)

603

Belt drive cap

633

Carriage drive pulley

G-36

G-36

Carriage motor

733

Figure 2-13

Rev. A Assembly and Disassembly 2-13

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Pre-assembly of the Carriage Assembly

1. Insert the oil rings into the carriage head and lubricate.

2. Insert the flat surface of the oil rings downward.

3. Hook the carriage spring to the carriage head. Push in until you feel the carriage spring
click.

O-10

605 Oil ring

Carriage assembly

611 Carriage spring

Figure 2-14

709

605

Oil ring

O-10

2-14 Assembly and Disassembly Rev. A

Confidential

4. Insert the carriage belt into the carriage assembly.

5. Fit the belt along the groove in the back side of the carriage assembly. The direction of the
belt should be so that the front side is facing the inside of the belt.

TM-U675/U675P (with MICR) Service Manual

629
Carriage belt

Figure 2-15

Rev. A Assembly and Disassembly 2-15

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Pre-assembly of the H. P. Detector Assembly

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

Note:

Check that the soldering is secure.

707 H.P. detector assembly

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

Figure 2-16

2-16 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

Pre-assembly of the Carriage Frame

1. Lubricate five shafts on the carriage sub assembly frame.

2. Insert the ribbon feed spring into the ribbon take-up gear shaft. Set the ribbon feed spring
claw upward and insert all the way by rotating the ribbon feed spring to the right.

3. Lubricate the surface of the ribbon feed spring.

4. Attach the ribbon take-up gear assembly to the carriage sub assembly frame. Align the
ribbon feed spring claw and the ribbon take-up gear assembly and insert.

5. Attach the carriage transmission pulley to the carriage transmission pulley shaft.

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

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

712 Ribbon take-up gear assembly

G-36

Ribbon feed

601

spring

603 Belt drive cap

G-36

Carriage frame

688

sub assembly

632

Carriage transmission pulley

G-36

G-36

Figure 2-17

Rev. A Assembly and Disassembly 2-17

Confidential

8. Insert the carriage drive transmission gear onto the transmission gear shaft.

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

10. Insert the ribbon reduction gear into the ribbon reduction gear shaft.

11. Insert the ribbon intermediate gear into the ribbon intermediate gear shaft. The smaller
diameter ribbon intermediate gear should be on the lower side.

12. Attach the ribbon drive plate assembly above the ribbon reduction gear and the ribbon
intermediate gear. Set the ribbon drive plate assembly downward.

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

720

E-ring (2)

E-ring (2)

706

Ribbon drive plate assembly

682

Ribbon reduction gear

720

Figure 2-18

768

Gear train cover

634 Carriage drive transmission gear

683 Ribbon intermediate gear

720 E-ring (2)

2-18 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

14. Insert the carriage motor onto the carriage sub assembly frame nibs and fasten with one
screw. Temporarily fasten the screw on the lead wire side.

15. Loosen the carriage motor stopper screw (less than one turn).

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

Carriage motor

775

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

733

775

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

630

Belt tension spring

Figure 2-19

Rev. A Assembly and Disassembly 2-19

Confidential

17. Insert the carriage guide shaft into the carriage assembly and attach to the carriage sub
assembly frame with one E-ring. Set the E-ring groove on the carriage guide axis on the
right side and set the carriage spring as shown in the illustration.

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

19. Hook the carriage belt onto the carriage transmission pulley and carriage transmission drive
pulley.

20. Tighten the stopper screw on the lead wire side of the carriage motor.

21. Attach the carriage motor to the carriage sub assembly frame with one screw.

688
Carriage frame sub assembly

611 Carriage spring

709
Carriage assembly

723 E-ring (5)

Figure 2-20

O-10

631

Carriage guide shaft

O-10

2-20 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

22. Align the intermediate circuit board assembly with the carriage sub assembly frame in two
places, and insert the intermediate circuit board cover.

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

24. Attach the H. P. detector circuit board to the carriage sub assembly frame. Keep the H. P.
detector assembly lead wire from being pinched between the carriage sub assembly frame.

775

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

707

H.P. detector assembly

708

Intermediate

769

circuit board cover

775

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

Figure 2-21

Intermediate
circuit board assembly

775

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

Rev. A Assembly and Disassembly 2-21

Confidential

25. Pass the print head unit Eb FPC through the slit in the carriage assembly. When you do this,
the FPC should be below the two hooks on the carriage assembly. Install the print head unit
(Eb) into the carriage assembly. Insert the FPC into the intermediate circuit board assembly
connector.

26. Attach the nose guide to the carriage assembly with one screw. Align the three nibs on the
carriage assembly tip and insert.

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

Slit

FPC

Hooks

Nose guide

689

Print head

unit (Eb)

FPC

623

608

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

FPC

689

688

Carriage frame
sub assembly

Print head unit (Eb)

G-36

Figure 2-22

709 Carriage assembly

Figure 2-23

708

Intermediate
circuit board assembly

G-36

2-22 Assembly and Disassembly Rev. A

Confidential

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

Note:

Check that the soldering is secure.

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

Note:

Check that the soldering is secure.

30. Turn intermediate cables A, B, C to the right side.

TM-U675/U675P (with MICR) Service Manual

Intermediate cable tube

Figure 2-24

771

Rev. A Assembly and Disassembly 2-23

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Pre-assembly of the Front Cover Detector Assembly

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

Note:

Check that the soldering is secure.

691 Front cover detector assembly

Lead wire (type U) 760

Lead wire (type V) 761

Lead wire (type W) 762

Figure 2-25

Pre-assembly of the Rear Cover Detector Assembly

1. Solder lead wires X, Y, Z to the cover detector circuit board.

Note:

Check that the soldering is secure.

692 Rear cover detector assembly

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

Figure 2-26

2-24 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

Assembly of the Paper Feed Frame

Pre-assembly of the Paper End Detector Assembly

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

Note:

Check that the soldering is secure.

710 Paper end detector assembly

Lead wire (type O) 754

Lead wire (type P) 755

Lead wire (type Q) 756

Figure 2-27

Pre-assembly of the Assist Paper Guide Assembly

1. Attach the backup paper guide cap to the center of the assist paper guide.

2. Attach the paper hold roller, assist paper guide spring, and paper hold roller shaft to the
assist paper guide with two C-rings. Hook the spring into the hole in the right side of the
paper guide so that the hook is in front of the paper guide and the hanging part is toward
the back of the paper guide.

3. Apply lubrication to the center of the paper hold roller.

Note:

After lubricating, check that the assist paper guide rotates under its own weight.

678 Backup paper guide cap

Assist paper guide

C-ring (5103-21)

772

Paper hold roller

664

665

G-36

772

C-ring (5103-21)

653

Assist paper guide spring

642 Paper hold roller shaft

Figure 2-28

Rev. A Assembly and Disassembly 2-25

Confidential

4. Attach the paper feed frame to the paper guide lever and sub paper hold roller.

5. Attach the sub paper hold roller shaft to the paper feed frame and sub paper hold roller with
one E-ring.

Note:

Check the status of the roller shaft and E-ring.

6. Attach the paper guide lever spring to the paper guide lever and paper guide lever shaft
with one E-ring.

698 Paper feed frame assembly

724

E-ring (2.3)

640

663

Sub paper
hold roller

639

Paper guide lever shaft

Sub paper hold roller shaft

724

E-ring (2.3)

658 Paper guide lever

652 Paper guide lever springs

Figure 2-29

2-26 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

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

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

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

722 E-ring (4)

G-48

730

Crank shaft
holder

699 Sub paper feed roller assembly

Sub paper feed roller assembly

699

G-48

602 Parallel pin (1.6X10)

730 Crank shaft holder

648 Paper feed gear

602

722 E-ring (4)

Figure 2-30

Rev. A Assembly and Disassembly 2-27

Confidential

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

698 Paper feed frame assembly

652

Paper guide lever spring

Figure 2-31

658 Paper guide lever

2-28 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

11. Attach the paper end detector assembly to the paper feed frame assembly.

710 Paper end detector assembly

Figure 2-32

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

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

14. Attach the paper feed gear to the sub paper feed transmission shaft with one E-ring.

G-48

722 E-ring (4)

730 Crank shaft holder

666

Paper feed roller

Crank shaft holder

730

602

648 Paper feed gear

722 E-ring (4)

G-48

648 Paper feed gear

722 E-ring (4)

602 Parallel pin (1.6X10)

666

Paper feed roller

Figure 2-33

Rev. A Assembly and Disassembly 2-29

Confidential

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

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

654

Paper feed

roller spring

654

Paper feed
roller spring

Figure 2-34

2-30 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

17. Insert the slip feed roller holder onto the slip feed roller. Insert so that the D cut on the slip
feed roller is on the right and the slip feed roller holder leg is below.

18. Attach the slip feed roller to the platen lever assembly. Turn the hinge unit upright and the
D cut to the right while the platen assembly attachment is in the front. Insert the slip feed
roller holder into the third hole from the left of the platen lever assembly.

19. Insert the slip drive gear into the slip feed roller with one E-ring.

20. Lubricate both sides of the slip feed roller and the slip feed roller holder and rotate.

721 E-ring (3)

624 Platen lever assembly

668

649 Slip drive gear

G-48

Slip feed roller holder

659

G-48

668

Slip feed roller

Figure 2-35

Rev. A Assembly and Disassembly 2-31

Confidential

21. Insert a nylon lock nut into the platen lever assembly (one place). The blue area should be
below the screw hole.

22. Insert the platen ground plate into the platen lever assembly.

23. Insert two platen springs into the platen lever assembly. (See the illustration below.)

24. Insert a second nylon lock nut.

25. Attach the platen assembly to the platen lever assembly (two places). Tighten the screws for
both positions of the platen and the platen lever assembly.

26. Attach the slip paper guide to the platen lever assembly. Hang the slip paper guide on the
hooks in three places on the platen lever assembly and insert into the two nibs.

Platen adjustment

685

screw

711 Platen assembly

Nylon lock nut

718

Platen spring

604

670

Slip paper guide

685

Platen adjustment screw

604

Platen spring

Figure 2-36

674

Platen ground
plate (type A)

718 Nylon lock nut

2-32 Assembly and Disassembly Rev. A

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TM-U675/U675P (with MICR) Service Manual

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

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

721 E-ring (3)

721 E-ring (3)

Left platen lever shaft

626

627

Right platen lever shaft

625

Platen lever spring

675

Platen ground plate
(type B)

Figure 2-37

29. Insert the lead wires for the paper end detector assembly in their specified positions.

Figure 2-38

Rev. A Assembly and Disassembly 2-33

Confidential

30. Attach the cover ground plate to the paper feed frame.

31. Cover the paper feed frame using the paper feed cover and tighten the two plate assembly
lever screws.

32. Hang the assist paper guide spring onto the paper feed frame cover.

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

34. Attach the guide roller shaft and sub paper hold roller to the paper feed frame with two E­rings.

609

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

676 Cover ground plate

669

Paper feed
frame cover

719

E-ring (1.5)

657 Paper release lever

638 Release lever shaft

609

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

720

E-ring (2)

663 Sub paper hold roller

Figure 2-39

641 Guide roller shaft

663

Sub paper hold roller

720

E-ring (2)

2-34 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

Note:

Check the status of the roller shaft and E-ring.

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

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

701

Paper feed frame fixing
L lever (type A) assembly

722

E-ring (4)

Paper feed frame

fixing lever spring

655

(type A)

Figure 2-40

702

Paper feed
frame fixing
R lever (type A)
assembly

655

Paper feed frame
fixing lever
spring (type A)

722 E-ring (4)

Rev. A Assembly and Disassembly 2-35

Confidential

37. Hook the paper feed frame fixing lever spring.

38. Attach the parallel pin and paper feed gear to the paper feed roller with one E-ring.

602

648 Paper feed gear

722 E-ring (4)

G-36

Figure 2-41

602

Parallel pin (1.6X10)

2-36 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

Pre-assembly of the Paper Ejection Detector Assembly

1. Solder the paper ejection detector cable (type B ) assembly to the paper ejection detector
circuit board.

Note:

Check that the soldering is secure.

2. Attach the paper ejection detector assembly and the paper ejection detector holder. Insert
into the paper ejection detector holder rack, and align the one nib with one screw.

3. Insert the paper ejection detector cable assembly into the carriage cover frame assembly.
Check the starting position for inserting the cable.

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

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

713

Carriage cover

frame assembly

690

Paper ejection
detector assembly

609

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

635 Paper ejection detector holder

738

Paper ejection detector cable
(type B) assembly

Figure 2-42

Rev. A Assembly and Disassembly 2-37

Confidential

Assembly of the Mechanism

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

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

Screws (C.B., 2.6X4)

726

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

773

686 Lever drive motor assembly

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

Figure 2-43

3. Attach the sub slip feed roller holder to the sub slip feed lever sub assembly with one screw.

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

660 Sub slip feed roller holder

687

Sub slip feed lever

sub assembly

Figure 2-44

2-38 Assembly and Disassembly Rev. A

Confidential

4. Attach the sub slip feed lever to the main frame sub assembly with one E-ring. Use the sub­slip feed lever shaft to fasten.

TM-U675/U675P (with MICR) Service Manual

E-ring (1.5)

719

644 Sub slip feed lever shaft

Figure 2-45

Rev. A Assembly and Disassembly 2-39

Confidential

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

6. Hook the form stopper spring to the main frame sub assembly and form stopper rack.

7. Hook the sub slip feed lever spring onto the sub slip feed lever.

620 Form stopper spring

619 Form stopper shaft

618

Form stopper

620

618

719 E-ring (1.5)

656 Sub slip feed lever spring

Figure 2-46

2-40 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

8. Attach the lever drive shaft assembly to the main frame sub assembly. Insert the D cut side
of the lever drive shaft assembly to the left when pulling the shaft into the round hole in the
bottom center of the main frame sub assembly.

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

Crank shaft holder

693

Lever drive shaft
assembly

730

723 E-ring (5)

730

Crank shaft holder

Figure 2-47

Rev. A Assembly and Disassembly 2-41

Confidential

10. Use one E-ring to attach the lever drive transmission gear to the main frame sub assembly
shaft.

11. Press the lever drive shaft gear into the lever drive shaft assembly.

12. Install the sub slip feed roller assembly into the main frame sub assembly. Align the D cut
side of the sub slip feed roller assembly with the U groove on the opposite side.

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

694

Sub slip feed
roller assembly

617

Lever drive
shaft gear

721 E-ring (3)

616 Lever drive transmission gear

649 Slip drive gear

Figure 2-48

2-42 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

14. Snap fit the lever drive motor detector plate to the lever drive motor gear.

15. Lubricate the lever motor reduction shaft.

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

Lever drive motor

detector plate

615

Lever motor

reduction gear

724

E-ring (2.3)

614

G-36

Figure 2-49

Rev. A Assembly and Disassembly 2-43

Confidential

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

18. Lubricate the sub slip feed roller holder.

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

20. Lubricate the main frame sub assembly and sub slip feed roller in two places where they
contact.

21. Lubricate the sub slip feed roller and main frame sub assembly.

22. Lubricate the area where the stopper drive shaft contacts the form stopper.

23. Lubricate the lever drive cam.

G-48

G-36

G-48

G-48

G-48

G-48

G-48

G-48

Figure 2-50

2-44 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

Note:

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

24. Attach the validation detector assembly to the slip guide lower frame (type B) with one
screw.

25. Attach the validation stopper and validation stopper spring to the slip guide lower frame
(type B).

26. Attach the slip B.O.F. detector assembly to the slip guide lower frame (type B) with one
screw.

672 Validation stopper

Slip guide lower frame

662

(type B)

673

672

662

673

Validation stopper spring

Figure 2-51

697

Validation detector assembly

609

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

696

Slip B.O.F. detector assembly

Rev. A Assembly and Disassembly 2-45

Confidential

Note:

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

27. Attach the validation detector assembly to the slip guide lower frame assembly (type B) with
one screw.

28. Insert the validation stopper and validation stopper spring into the slip guide lower frame
assembly (type B).

29. Attach the slip B.O.F. detector assembly to the slip guide lower frame assembly (type B) with
one screw.

672 Validation stopper

Slip guide lower frame

assembly (type B)

B-6

673

672

B-6

673

Validation stopper spring

Figure 2-52

697

Validation detector
assembly

696

Slip B.O.F. detector assembly

609

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

2-46 Assembly and Disassembly Rev. A

Confidential

Note:

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

30. Attach the slip guide lower frame (type B) to the main frame sub assembly using two screws
(only if your printer does not have a MICR unit).

TM-U675/U675P (with MICR) Service Manual

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

Figure 2-53

Rev. A Assembly and Disassembly 2-47

Confidential

Note:

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

31. Attach the slip guide lower frame assembly (type B) to the main frame sub assembly using
two screws (only if your printer has a MICR unit).

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

Figure 2-54

2-48 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

32. Insert the sub slip hold sleeve to both ends of the roller for the sub slip hold roller.

33. Temporarily attach the front frame and the slip guide upper frame. Insert the D cut side of
the sub slip hold roller to the right; align the two nibs and temporarily assemble.

661 Slip guide upper frame

667 Sub slip hold roller

770

Sub slip
hold sleeve

613 Front frame

Figure 2-55

770

Sub slip hold sleeve

Rev. A Assembly and Disassembly 2-49

Confidential

34. Attach the slip guide upper frame to the main frame sub assembly. Align the slip guide
frame nibs in three places.

35. Attach the front reinforcement frame to the front frame using six screws. Align and insert
the three nibs and check that the front reinforcement frame and the slip guide upper frame
are not rising.

36. Tighten the screws on the slip guide upper frame using two screws.

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

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

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

726

726

680 Endorsement platen shutter

Front reinforcement frame

612

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

Figure 2-56

2-50 Assembly and Disassembly Rev. A

Confidential

38. Insert the slip hold roller spring onto the slip hold roller shaft from the D cut side.

39. Insert the slip hold roller sleeve onto the slip hold roller shaft from the D cut side.

40. Insert the two slip feed roller shaft holders to the slip hold roller shaft with the flange facing
inward.

610 Slip feed roller shaft holder

645 Slip hold roller shaft

Slip hold roller spring

Slip hold roller sleeve

Slip feed roller shaft holder

TM-U675/U675P (with MICR) Service Manual

767

766

610

Figure 2-57

Rev. A Assembly and Disassembly 2-51

Confidential

41. Attach the slip hold roller shaft to the main frame sub assembly.

Figure 2-58

2-52 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

42. Attach the slip feed roller shaft holder to the sub slip hold roller with two E-rings.

43. Push in the slip drive gear to the slip hold roller shaft starting from the side whose diameter
is largest.

44. Press in the slip drive gear to the sub slip hold roller.

721 E-ring (3)

610

Slip feed roller
shaft holder

649 Slip drive gear

Figure 2-59

610 Slip feed roller shaft holder

721 E-ring (3)

649 Slip drive gear

Rev. A Assembly and Disassembly 2-53

Confidential

45. Insert two slip transmission gears onto slip transmission gear shafts A on the main frame
sub assembly. (See the illustration below.)

46. Insert one slip transmission gear onto slip transmission gear shaft B.

47. Insert the paper feed reduction gear onto the paper feed reduction gear shaft on main frame
sub assembly starting from the gear whose diameter is smallest. Attach the E-ring.

729

Paper feed reduction gear

721 E-ring (3)

Figure 2-60

647

Slip transmission
gears

647

647 Slip transmission gear

2-54 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

48. Lubricate the J/S change gear shaft.

49. Insert the J/S change gear onto the J/S change gear shaft.

50. Insert the paper feed reduction gear onto the paper feed reduction gear shaft starting with
the gear whose diameter is smallest.

51. Insert the take-up drive gear onto the take-up drive gear shaft.

52. Insert the paper feed transmission gear onto the paper feed transmission gear shaft on the
main frame sub assembly.

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

G-36

721 E-ring (3)

646 Take-up drive gear

721 E-ring (3)

729 Paper feed reduction gear

637 Paper feed transmission gear

721 E-ring (3)

728

J/S change gear

721

E-rings (3)

Figure 2-61

Rev. A Assembly and Disassembly 2-55

Confidential

Note:

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

54. Attach the lever drive coil assembly to the slip guide lower frame with two screws (only if
your printer does not have a MICR unit).

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

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

Figure 2-62

2-56 Assembly and Disassembly Rev. A

Confidential

Note:

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

55. Attach the lever drive coil assembly to the slip guide lower frame assembly with two screws.

TM-U675/U675P (with MICR) Service Manual

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

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

Figure 2-63

56. Perform phase adjustment. (See Chapter 3,"Adjusting and Setting." )

Rev. A Assembly and Disassembly 2-57

Confidential

Note:

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

57. Attach the paper feed motor to the main frame sub assembly with two screws.

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

Figure 2-64

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

2-58 Assembly and Disassembly Rev. A

Confidential

Note:

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

58. Attach the paper feed motor to the main frame sub assembly with two screws.

59. Check that the circuit board side of the motor is facing the back of the mechanism.

739 Paper feed motor

TM-U675/U675P (with MICR) Service Manual

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

Figure 2-65

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

Rev. A Assembly and Disassembly 2-59

Confidential

60. Align the J/S change solenoid with the nibs and attach to the main frame sub assembly with
one screw.

61. Lubricate the J/S change gear.

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

G-36

721 E-ring (3)

727 J/S change solenoid

Figure 2-66

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

2-60 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

63. Snap fit the slip T.O.F. detector assembly to the slip guide upper frame.

64. Insert the lead wire.

703
Slip T.O.F. detector assembly

Figure 2-67

65. Attach the lever motor T. P. detector assembly to the main frame sub assembly with one
screw. Turn over the main frame sub assembly and align the detector with the lever drive
motor detector plate in two places. Check that the lever drive motor detector plate and the
detector do not touch.

614

704

704

Lever motor T.P.

detector assembly

726

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

614 Lever drive motor detector plate

Figure 2-68

Rev. A Assembly and Disassembly 2-61

Confidential

66. Attach the main circuit board assembly (type AB) with two screws. Place the side with the
connector to the front of the main frame sub assembly, and insert so that the soldered side of
the main circuit board assembly (type AB) is up. Align with the nibs in two places.

67. Solder the lead wires of the cables. (Including the paper ejection detector cable (type A)
assembly.)

Note:

Check the quality of the soldering.

68. Insert the wiring.

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

705
Main circuit board
(type AB) assembly

737
Paper ejection detector
cable (type A) assembly

Figure 2-69

2-62 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

Note:

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

69. Pass the MICR unit cable through the hole in the main frame sub assembly, and attach the
slip guide lower frame (type A) with two screws. Install so that the MICR shield cover (type
A) is facing upward and that the solenoid is on the right side. Tighten the screws from the
outer side of the main frame sub assembly.

776

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

776

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

Figure 2-70

Rev. A Assembly and Disassembly 2-63

Confidential

Note:

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

70. Attach the MICR plate shutter to the slip guide lower frame (type B) with one screw.

679

MICR shutter

776

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

Figure 2-71

2-64 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

71. Attach the carriage frame unit to the main frame sub assembly with four screws.

72. Pass the intermediate cable through the hexagonal hole in the main frame sub assembly and
pull out enough cable. Fit the nibs in the carriage frame unit in the main frame notches.

Note:

Check the operating status of the ribbon drive plate assembly.

73. Solder the intermediate cables (type A, B, and C) to the main circuit board.

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

Figure 2-72

726

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

Rev. A Assembly and Disassembly 2-65

Confidential

74. Attach the paper feed frame stopper and belt plate to the main frame sub assembly.

75. Align the front cover detector assembly with the nibs on the main frame sub assembly and
attach.

76. Solder the lead wire of the front cover detector assembly to the main circuit board.

Note:

Check the quality of the soldering.

77. Install the wiring.

677 Paper feed frame stopper

684 Belt plate

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

Figure 2-73

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

2-66 Assembly and Disassembly Rev. A

Confidential

TM-U675/U675P (with MICR) Service Manual

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

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

636

R cover detector cap

715

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

Figure 2-74

Rev. A Assembly and Disassembly 2-67