Contents
Revision Table
For Safe Repair and Maintenance Work
- Key to Symbols
- Safety Precautions on Maintenance/Repair/Inspection
Modular Connectors
About this Manual
- Aim of the Manual
- Manual Content
Chapter 1
- Product Overview
Chapter 2
- Repair Guide
Chapter 3
- Troubleshooting
Chapter 4
- Disassembly and Assembly
Chapter 5
- Adjustment and Setting
Chapter 6
- Preparation for Shipment
Appendix
- Parts List
  - Reference Number List

Epson TM-U220PA User Manual

Displayed below is the user manual for TM-U220PA by Epson which is a product in the Dot Matrix Printers category. This manual has pages.

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Confidential

Service manual

TM-U220 Series

(Type A)

English

404619501

Rev. B

Issued date , ,

Issued by

EPSON

Rev. B i

TM-U220 Type A Service Manual

Confidential

CONFIDENTIALITY AGREEMENT

BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT. PLEASE RETURN

THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE TO THESE TERMS.

❏This document contains confidential, proprietary information of Seiko Epson Corporation or its affiliates. You

must keep such information confidential. If the user is a business entity or organization, you must limit disclosure

to those of your employees, agents, and contractors who have a need to know and who are also bound by

obligations of confidentiality.

❏On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson’s request, you must

stop using the confidential information. You must then return or destroy the information, as directed by Seiko

Epson.

❏If a court, arbitrator, government agency, or the like orders you to disclose any confidential information, you must

immediately notify Seiko Epson. You agree to give Seiko Epson reasonable cooperation and assistance in the

negotiation.

❏You may use confidential information only for the purpose of operating or servicing the products to which the

document relates, unless you obtain the prior written consent of Seiko Epson for some other use.

❏Seiko Epson warrants that it has the right to disclose the confidential information. SEIKO EPSON MAKES NO

OTHER WARRANTIES CONCERNING THE CONFIDENTIAL INFORMATION OR ANY OTHER

INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY WARRANTY OF TITLE

OR NON-INFRINGEMENT. Seiko Epson has no liability for loss or damage arising from or relating to your use of

or reliance on the information in the document.

❏You may not reproduce, store, or transmit the confidential information in any form or by any means (electronic,

mechanical, photocopying, recording, or otherwise) without the prior written permission of Seiko Epson.

❏Your obligations under this Agreement are in addition to any other legal obligations. Seiko Epson does not waive

any right under this Agreement by failing to exercise it. The laws of Japan apply to this Agreement.

Cautions

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

means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of

Seiko Epson Corporation.

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

❏While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no

responsibility for errors or omissions.

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

❏Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties

for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or

abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.)

failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.

❏Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options

or any consumable products other than those designated as Original EPSON Products or EPSON Approved

Products by Seiko Epson Corporation.

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

ii Rev. B

Confidential

Contents

Revision Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv

For Safe Repair and Maintenance Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

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

Modular Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi

About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Aim of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Manual Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii

Chapter 1 Product Overview

Notes on Connecting the Power Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Control Panel (LEDs and Button) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Power Switch and Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Inserting Roll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Installing or Replacing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

Differences between the TM-U300, TM-U200, and TM-U220 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

Chapter 2 Repair Guide

Repair Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Outline of Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Repair Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Confirming the User’s Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Confirming the Printer Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Service Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Chapter 3 Troubleshooting

Preparations for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Diagnosing Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Symptoms when Power is On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

Symptoms when the All Function Test is Executed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Symptoms for other operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

Test Points on the Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-21

Resistance Values of Printer Mechanism Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22

Chapter 4 Disassembly and Assembly

Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Standard Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Tool List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

Notes for Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Shortest Route for Disassembly of Major Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

Disassembling the TM-U220 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

Disassembling the Mechanism Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Rev. B iii

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Disassembling the Carriage Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

DIsassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Disassembling the Rotation Frame Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

DIsassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Disassembling the Roll Paper Guide / Roll Paper Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

DIsassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Disassembling the Autocutter Unit / Fixed Blade Holder Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

DIsassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Disassembly and Assembly Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Lubrication Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

Chapter 5 Adjustment and Setting

Setting the Installation Position for the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Adjusting the Detection Point for the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Setting the Paper Roll Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Setting the Autocutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Carriage Belt Tension Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Adjust Various Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

How to Confirm the Current Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Adjusting the DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Memory Switch Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Chapter 6 Preparation for Shipment

Inspection and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

How to Clean the Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Removing Dirt, Paper Chips, and Dust from Inside the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Appendix Parts List

Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

iv Rev. B

Confidential

Revision Table

Revision Pages Description

Rev. A All pages Newly authorized.

Rev. B 1-2 Part names added.

1-3 Control panel (LEDs and buttons) added.

1-4 Inserting roll paper added.

1-8 Installing and replacing the ribbon cassette added.

4-3, 4-4 Illustration was changed.

4-5, 4-16, 4-17 An explanation of the roll paper cover assembly was added.

4-6, 4-7 Cutter rotation plate (1129) added.

4-7 Step 6 added to disassembly.

4-10, 4-11, 4-20 Paper feed roller plate B deleted.

4-11 An explanation of the platen assembly 1 was added.

4-30 An explanation of the lubrication reference was added.

Chapter 6 Inserting roll paper and installing or replacing the ribbon cassette was

moved to Chapter 1.

Rev. B v

TM-U220 Type A Service Manual

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 yourself, damage to your equipment, or loss of

data.

Note:

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

vi Rev. B

Confidential

Safety Precautions on Maintenance/Repair/Inspection

WARNING:

❏Be sure to use the EPSON-supplied fuse on the circuit board. Use of another fuse 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 thunderstorm.

❏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.

CAUTION:

❏Parts on the circuit board may become hot during operation. Therefore, wait

approximately 10 minutes after turning the power off before touching them.

❏To avoid injury, take care not to insert fingers or any part of the hand in the paper roll

opening where the manual cutter is installed.

❏Do not open the paper roll cover without taking the necessary precautions, as this

can result in injury from the autocutter fixed blade.

Modular Connectors

Use the modular connectors specifically designed for the cash drawer and customer display for

this product. Do not connect these connectors to an ordinary telephone line.

Rev. B vii

TM-U220 Type A Service Manual

Confidential

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 Product Overview Provides an overview of the product.

Chapter 2 Repair Guide Describes the instructions to complete repair of

the product.

Chapter 3 Troubleshooting Provides information on troubleshooting.

Chapter 4 Disassembly and

Assembly Describes disassembly and assembly procedures.

Also, shows exploded diagrams and lubrication

point diagrams for this product.

Chapter 5 Adjustments and Settings Describes adjusting and settings procedures.

Chapter 6 Preparation for shipment Describes preparation for transport. Also

provides information on maintenance,

inspection, and cleaning.

Appendix Parts List Provides a parts list. Also describes screw types.

Rev. B Product Overview 1-1

TM-U220 Type A Service Manual

Confidential

Chapter 1

Product Overview

The TM-U220 is a serial impact dot-matrix printer for POS systems that can print on roll paper of

various widths. This manual describes the TM-U220 Type A, which has a take-up shaft for

journal paper. The following model types are available for the TM-U220.

TM-U220 Model Comparison

Note: * Other compatible interfaces, such as USB and Ethernet, are available from the dealer.

** Multilingual support means that the printer can print any one of the following: Japanese Kanji, Simplified

Chinese, Traditional Chinese, Thai characters, or Korean characters.

Notes on Connecting the Power Supply Unit

Be sure to use the correct power supply unit, as listed in the table below.

Note:

The AC adapter C, which is packed with the alphanumeric model, cannot be used with the multilingual

model. Be sure to use the PS-180 with the multilingual model. If the AC adapter C power supply is

connected to the multilingual model by mistake, the printer may not operate correctly. For example,

printing may stop before all lines are printed, or the printer might print the same line repeatedly.

Type A Type B Type D

Two-color printing Yes Yes Yes

Autocutter Yes Yes No

Take-up device Yes No No

Paper width 76 / 69.5 / 57.5 mm

{3" / 2.74" / 2.26"}

76 / 69.5 / 57.5 mm

{3" / 2.74" / 2.26"}

76 / 69.5 / 57.5 mm

{3" / 2.74" / 2.26"}

Interface (supplied with printer)* Serial or parallel Serial or parallel Serial or parallel

Characters supported Alphanumeric (ANK) or

multilingual**

Alphanumeric (ANK) or

multilingual**

Alphanumeric (ANK) or

multilingual**

TM-U220 alphanumeric model TM-U220 multilingual model

1. AC adapter C (packed with the alphanumeric model)

2. PS-180 (option) PS-180 (packed with the multilingual model)

TM-U220 external views

Type B Type D

Type A

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Configurations

This TM-U220 is configured by combining features from the list below.

Note: Selections in the table above may be added to or changed in the future.

dpi: dots per 25.4 mm (dots per inch)

Part Names

The figure below shows part names for the TM-U220.

Table 1-1 Configurations

Features Selection Description

Interface types

UB-S01 (RS-232)

UB-P02II (IEEE 1284 (bidirectional parallel))

EPSON UB universal interface board

options

Use an EPSON-approved interface board

Paper width selections 76, 69.5, or 57.5 mm {3", 2.74", or 2.26"}

Be sure to change the paper guide

spacer if paper of a different width is used.

Then, set the customized value in printer

memory for the correct paper width. For

details about how to set the paper width,

see Chapter 6, “Installation.”

Power supply unit types

Exclusive external power supply for the

alphanumeric model:

AC Adapter C (North America only)

(pre-packaged).

External power supply unit for the

multilingual model:

PS-180

Do not use the AC Adapter C with the

multilingual model.

Installation positions

Horizontally (default)

Vertically by use of the optional WH-10

wall-hanging bracket

Roll paper cover

Control panel

Ribbon cassette cover

Power switch

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Control Panel (LEDs and Button)

LEDs

POWER

On when power is on.

ERROR

On when printer is offline. Off when printer is online. Flashes during an error.

PAPER OUT

On when paper is out or nearly out. Flashes during self-test

Button

FEED

This button feeds roll paper or starts a self-test.

Note:

Paper cannot be fed by using this button when a paper out is detected.

Power Switch and Power Switch Cover

The power switch is on the front of the printer. Press this switch to turn on the printer.

Power Switch Cover

This cover prevents the power from being turned off accidentally during printing. If you need to

turn the power on or off while the cover is attached, you can insert a small screwdriver or

similar tool into one of the holes in the cover to flip the switch.

WARNING:

If an accident occurs while the power switch cover is attached, immediately unplug the

power supply cable to avoid fire.

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Inserting Roll Paper

CAUTION:

Be sure to use only roll paper that meets the specifications.

Be sure not to touch the manual cutter. Otherwise, you may cut your fingers.

1. Using scissors, cut the leading edge of the roll paper.

2. Turn on the printer and open the roll paper cover by using the tab.

3. Open the unit by using the unit open lever, as shown below.

Unit open lever

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4. Insert the roll paper.

Note:

Note the direction that the paper comes off the roll, as shown above.

When using two-ply paper, be sure that the top and bottom sheets are aligned at the paper exit. Do not

allow paper to be loaded as shown below.

5. If you are not using the take-up flange, pull out a small amount of roll paper and close the

roll paper cover. Then, tear off the paper with the manual cutter. You can skip steps 6

through 11.

6. When using 2-ply roll paper, pull out the roll paper to the bottom front of the printer, as

shown below.

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7. Close the unit, as shown below.

8. Insert the end of the bottom layer of paper (journal paper) into the paper take-up flange, as

shown below.

9. Insert the paper take-up flange into the printer. Be sure that the paper is aligned with the

flange, as shown.

10. Feed the paper with the FEED button so that the paper is taken up by the flange.

11. Close the roll paper cover and tear off the roll paper with the manual cutter, as shown

below.

Note:

Do not open the roll paper cover during printing or paper feeding.

When using the printer, be sure to cut the roll paper with the manual cutter after paper feeding is

complete.

Take-up flange

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Installing or Replacing the Ribbon Cassette

CAUTION:

EPSON recommends the use of only genuine EPSON ribbon cassettes. Ribbon cassettes

not manufactured by EPSON may cause damage to your printer that is not covered by

EPSON’s warranties.

To install the ribbon cassette for the first time or to replace a used ribbon, follow the steps below.

1. Unpack the ribbon cassette and turn the knob in the direction shown to take up any slack.

2. Open the printer’s ribbon cassette cover using the tabs on each side of the cover.

3. Remove the old ribbon, if there is one.

4. Insert cassette as shown below. Put ribbon between print head and platen. Push cassette

down until it clicks.

Note:

Make sure the ribbon is installed between the print head and the platen without wrinkles or creases.

5. Again, turn the cassette knob 2 or 3 times to take up slack.

6. Close the printer’s ribbon cassette cover.

Knob

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Differences between the TM-U300, TM-U200, and TM-U220

Specification TM-U300 (Type A, B, C, D) TM-U200 (Type A, B, D) TM-U220 (Type A, B, D)

Print speed 3.5 lines/second (at 40 columns, 16 cpi) 3.5 lines/second (at 40 columns, 16 cpi) 4.7 lines/second (at 40 columns, 16 cpi)

Paper feed speed 25 lines/second 25 lines/second 30 lines/ second

Character tables Alphanumeric 95, international 32,

extended 126 x 7 Alphanumeric 95, international 32,

extended 128 x 8 Alphanumeric 95, international 48,

extended 128 x 12

Paper loading Paper roll holding shaft Semi automatic loading Drop in loading

Paper near-end sensor Yes Option Configured option

Cover open detector Yes No Yes

Paper width 76 mm 76 mm 76 mm, 69.5 mm, or 57.5 (B and D only)

Number of copies Original + 2 copies (at 77°F)

Original + 1 copy (at all temperatures) A and B: original + 1 copy;

D: original + 2 copies All models: original + 1 copy

Autocutter

(Type A, B only) Full cut or partial cut set by command Partial cut default;

full cut set by command Partial/full cut set by command

Auto take-up unit Type A, C Type A Type A

Print area 76 mm paper:

Width: 63.34 mm (200 dots x

400 positions)

Left margin: 6 mm

Right margin: 6.5 mm (approx.)

76 mm paper:

Width: 63.34 mm (200 dots x

400 positions)

Left margin: 5.9 mm

Right margin: 6.76 mm

76 mm paper:

Width: 63.34 mm (200 dots x

400 positions)

Left margin: 6.8 mm

Right margin: 5.8 mm

69.5 mm paper:

Width: 57 mm (180 dots x

360 positions)

Left margin: 6.7 mm

Right margin: 5.8 mm

57.5 mm paper:

Width: 47.5 mm (150 dots x

300 positions)

Left margin: 4.2 mm

Right margin: 5.8 mm

Space from autocut to

print start:

Space from manual cut to

print start:

36 mm

Type A, B: 26 mm; Type C, D: 28 mm

27 mm

20.2 mm

27 mm

Type D: 22.1 mm; Type A, B: 34.9 mm

Receive buffer Alphanumeric: 1KB/40 bytes

Multilingual: 512 bytes/40 bytes Alphanumeric: 1KB/40 bytes

Multilingual: 512 bytes/40 bytes Alphanumeric: 4KB/40 bytes

Multilingual: 4KB/40 bytes

NV bit image memory Alphanumeric: none

Multilingual: none Alphanumeric: none

Multilingual: none Alphanumeric: 128KB

Multilingual: 128KB

NV user memory Alphanumeric: none

Multilingual: none Alphanumeric: none

Multilingual: none Alphanumeric: 8KB

Multilingual: 8KB

Power supply PA-6509 or PB-6509 (North America) PB-6509 (North America) AC Adapter C — Low-cost universal

power supply for impact dot matrix

printer supplied in box.

Dimensions (W x D x H) Type A: 170 x 288 x 183 mm

{6.7 x 11.3 x 7.2"}

Type B: 170 x 253 x 148 mm

{6.7 x 10 x 5.8"}

Type C: 158 x 295 x 145 mm

{6.2 x 11.6 x 5.7"}

Type D: 158 x 235 x 125 mm

{6.2 x 9.3 x 4.9"}

Type A: 160 x 295 x 160 mm

{6.3 x 11.6 x 6.3"}

Type B: 160 x 248 x 150 mm

{6.3 x 9.8 x 5.9"}

Type D: 160 x 248 x 133 mm

{6.3 x 9.8 x 5.2"}

Type A: 160 x 286 x 157.5 mm

{6.3 x 11.3 x 6.2"}

Type B: 160 x 248 x 138.5 mm

{6.3 x 9.8 x 5.5"}

Type D: 160 x 248 x 138.5 mm

{6.3 x 9.8 x 5.5"}

Installation Horizontally with a 15° slant, maximum.

Type B, D: Vertically on wall using WH-10

bracket.

Horizontally with a 15° slant, maximum. Horizontally with a 15° slant, maximum.

Optional IR tray also can be used.

Type B, D: Vertically on wall using WH-10

bracket.

Buzzer None None Printer also can be used with annunciator

interface.

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Chapter 2

Repair Guide

This chapter gives instructions to complete repair of the product. Follow the process in this

section for repair.

Repair Process

Outline of Repair

Check each item before and after repair, as shown in the following flowchart. This chapter

explains the operations to confirm a “normal state” of operation of items in the flowchart. If an

item is in a state other than the “normal state,” follow the instructions in the chapter to

troubleshoot based on the symptom.

Repair Flow

Confirming the User’s Environment

Confirm the printer’s settings by using the service utility.

Confirming the Printer Status

Confirm the status of the printer you are repairing. Confirm that the power turns on/off; run the

self-test; run all function tests with the service utility; and check other items, following the table

below. Perform the appropriate measures for the symptom.

Assembly/disassembly

Confirm the right status

Troubleshooting

If no problem is found, the product is considered to be

normal, and can be sent to the user’s environment.

Adjustment/setting

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Printer Status Checks

Once you have confirmed the printer status using the table above, you can perform the

necessary functions below.

❏Identification of defective parts. (See Chapter 3.)

❏Preparation for replacing parts. (Read and follow the precautions and notes at the beginning

of Chapter 4.)

❏Parts replacement, assembly, and disassembly. (See Chapter 4.)

❏Adjustment and setting. (See Chapter 5.)

❏Preparation for shipment. (See the Chapter 6 before sending the printer back to the

customer.)

Self-test

Operation

The self-test can be run using the service utility or by operating the control panel. See page 2-12

for information about control panel operation.

Before running the self-test, make sure the roll paper and ribbon are installed correctly in the

printer. Then, turn power off. To run the self-test, turn the power back on while holding down

the FEED button.

The first page of the self-test printout should look like the example in the table below. To print

the second part of the self-test, press FEED again.

Operation Normal printer operation When a problem occurs

Power on.

Power LED light comes on.

Mechanical initializing operation occurs.

ERROR LED light is off.

POWER LED does not light. (See page 3-3.)

ERROR LED light. (See page 3-3.)

ERROR LED flashes. (See page 3-4.)

PAPER OUT LED lights. (See page 3-6.)

Run the self-test.

*Refer to page 2-2

for operation.

POWER LED light comes on.

Prints the printer status. (See page 2-3.)

Prints the roll pattern after the FEED button

is pressed. (See page 2-3.)

Mechanical initialization occurs.

ERROR LED light is off.

Self-test cannot be performed. (See page 3-6.)

Printing cannot be performed. (See page 3-7.)

The print result is not normal. (See page 3-12.)

A paper jam occurs. (See page 3-14.)

PAPER OUT LED lights. (See page 3-6.)

Run the “all

function test” with

the service utility.

*Refer to page 2-7

for operation.

Reads printer status.

Prints the RECEIPT sheet. (See page 2-9.)

Prints the STATUS sheet after confirming the

sensor operation. (See page 2-10.)

Prints the REPORT sheet. (See page 2-12.)

The communication test fails. (See page 3-16.)

The print result is not normal. (See page 3-12.)

Drawer kick is not performed. (See page 3-17.)

The sensor does not work. (See page 3-18.)

Perform other

checks of

operation.

Normal opening/closing of roll paper

cover.

Normal opening/closing of ribbon cover.

The case is dirty.

Parts do not move smoothly. (See page 3-20.)

The case is dirty. (See page 3-20.)

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Printer Status Print

Normal printout result Explanation

➀

➁

➂

➃

➄

➅

➇



Main program version

Boot program version

➁ Interface classification

Interface information

➂ Receive buffer capacity *1)

*1) Differs depending on DIP SW1-2.

➃ Busy release conditions for receive buffer full *2)

*2) Differs depending on MSW 8-7. Prints only when the

receive buffer capacity is 4KB. (Does not print when the

receive buffer capacity is 40 bytes.)

➄ Busy condition *3)

*3) Differs depending on DIP SW1-8.

➅ Resident character *4)

*4) Performs a multilingual CG judgment when printing resident

characters.

7 Paper roll width *5)

*5) Differs depending on the paper roll width set with the

memory switch (customized value).

➇ Dot spacing between characters *6)

*6) Differs depending on DIP SW2-1.

9 Characters per line *7)

*7) Differs depending on the paper roll width and dots

between characters.

 Autocutter unit installed/not installed *8)

*8) Differs depending on DIP SW2-2.

Note:

➀ Version information

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Roll Pattern

Normal print result Explanation

Paper feeds 2 lines.

Paper is fed to a position where the user can see

the ending message at left.

Black (6 lines)

Red (6 lines)

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Service Utility

Using the service utility, you can confirm the printer status and change settings. The following

section explains the operation for confirming the printer status.

* To use the repair functions in the service utility, a password is required. Refer to the manual

supplied with the service utility for the password.

Start up of the service utility

When you start the service utility, the following communication conditions dialog box appears.

1. Model selection:

Select the TM-U220 (Type A model printer).

2. Communication condition selection:

Select the I/F used with the printer. You can confirm the communication conditions set for

the printer by running the self-test. Refer to the self-test section for details.

3. Communication test:

4. Confirm the communication status with the connected printer. Normally, the following

message appears.

When the communication conditions are set correctly, the following functions are available.

❏Self-test mode 1: Outputs the same results as the self-test printout of status.

❏Self-test mode 2: Outputs the same results as the self-test printout of the roll pattern.

1. Select the model (TM-U220).

2. Select the type of I/F.

3. Select the parameters to

communicate with the printer.

4. Test the communication.

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❏Real-time status: Lets you confirm sensor operations, such as cover open/close, in real

time.

❏Printer status: Lets you read and set the printer values collectively. Also, you can save

the settings to a file, read the set values in the file, and the display the default state. Refer

to the chapter on adjustment settings.

Printer sequence selection

When you click the Next button at the bottom of the communication conditions dialog box, the

printer sequence selection screen appears.

❏Test printing:

This outputs a test pattern to confirm printer status. Follow the screen instructions to

operate.

❏Confirmation of the drawer operation:

You can confirm the drawer open function and the change in the open/close status. Follow

the screen instructions to operate.

❏Setting for notification of power on:

You can enable or disable the notification function for power on.

❏Firmware update:

You can update the firmware. Follow the screen instructions to operate.

❏Main circuit board replacement wizard/backup wizard/restore wizard:

You can back up the data in the main circuit board and restore it in the repaired product.

Follow the screen instructions to operate.

2. Click Next to proceed.

1. Select a printer sequence

to execute.

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All Function Test

When you select the all function test in the printer sequence selection screen and click Next, the

all function test screen appears.

Select the test elements and click the Start button to start the all function test.

Using this test, you can check the following functions for the printer.

❏Communication function:

You can confirm that communication with the printer is enabled/disabled.

❏Setting function:

Reads and prints on the status sheet the status settings for EPSON NV memory, memory

switches, communication conditions, and customized value.

❏Receipt print function:

Prints patterns to confirm print operations and print quality.

❏Roll paper cut function:

The Type A model autocutter cuts roll paper after each printing on the roll.

❏Drawer open/close function:

Runs a test of drawer open/close operation while printing the receipt pattern. Be sure to

connect the drawer kick to the printer before executing the all function test.

❏Sensor function:

Confirms the operation of sensors controlling and detecting printer operations. The checking

method for the sensor indicated with the arrow is displayed on the screen. Operate the

printer following the instructions on the screen.

2. Click to start the All Function Test.

1. Select the test elements.

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When the sensor detects the printer operation correctly, OK is displayed.

When the sensor is not installed (depending on the printer model), you can skip with

the Skip button.

Test results are OK when the tests confirm the normal operation of the sensors.

3. Click If you want to skip the test.

1. Indicate the sensor to test.

2. Follow the message to operate

the printer.

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Output result

When the printer operates normally, the following sheet is printed. Refer to the chapters on

“Troubleshooting” and “Adjustment and Setting” when print results differ.

Receipt Print

Normal print result Explanation

➀

➁

➂

➃

➄

➅

➆

➇

➀ Prints execution date.

➁ Prints execution time.

➂ Prints “EPSON/”

➃ Prints “TM-U220.”

➄ Prints product serial number. *1)

➅ Prints graphic pattern. Checks for missing dots.

(See“Dots are missing continuously” on page 3-12.)

➆ Prints ANK characters. *2)

➇ Performs full cut. *3)

Note:

*1) When the serial number is not registered on the

product itself, “NG” is printed.

*2) When using the 2-color ribbon, prints in 2 colors.

*3) When autocutter setting is partial cut, full cut is

not performed.

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Status Print

Normal print result Explanation

➀

➂

➄

➅

➁

➃

➆

➇

➀ Prints execution date.

➁ Prints execution time.

➂ Prints “EPSON.”

➃ Prints “TM-U220.”

➄ Prints product serial number. *1)

➅ Prints setting status of memory switches. *2)

➆ Prints setting status of customize value. *3)

➇ Performs partial cut. *4)

Note:

*1) When the serial number is not registered on the

product itself, “NG” is printed.

*2, 3) When the default setting is changed, “*” is

printed before the memory switch number.

*4) When autocutter setting is full cut, partial cut is

not performed.

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Normal print result Explanation

➀

➂

➄

➅

➁

➃

➆

➇

➈

➀ Prints program version.

➁ Prints ”power on status” set with printer sequence.

➂ Displays size of main ROM. (Differs depending on

specifications.)

➃ Displays size of extended ROM. (Differs depending

on specifications.)

➄ Prints defined bit image data in NV memory. *1)

➅ Prints defined data in NV user memory. *2)

➆ Prints information on EPSON NV memory. It is

changeable with the printer status. *3)

➈ Prints definition of command default values.

Note:

*1, 2) Data defined by a user must be backed up

and restored.

Main program version is printed.

Boot program version is printed.

Original program version is printed.

Manufacturer name

Model name

Product serial no.

➇ Prints defined data for the space page.

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Report Print

Running a Self-test

The steps below describe how to run a self-test by operating the control panel.

1. Make sure the printer is turned off and the roll paper cover is closed properly.

2. While holding down the FEED button, turn on the printer using the switch on the front of the

printer. The self-test prints the printer settings and then prints the following, cuts the paper,

and pauses. (The PAPER OUT light flashes.)

If you want to continue SELF-TEST printing, Please press the FEED button.

3. Press the FEED button to continue printing. The printer prints a pattern using the built-in

character set.

4. The self test automatically ends and cuts the paper after printing the following:

*** completed ***

5. The printer is ready to receive data as soon as it completes the self test.

Note:

If you want to pause the self-test manually, press the FEED button. Press the FEED button again to

continue the self-test.

Normal print result Explanation

➀

➂

➄

➅

➁

➃

➆

➀ Prints execution date.

➁ Prints execution time.

➂ Prints “EPSON.”

➃ Prints “TM-U220.”

➄ Prints the serial number for the product.

➅ Prints the execution status of all function test.

➆ Prints test results of sensor operation. *1)

Note:

*1) When an operation such as cover open sensor

check is skipped using the button on the screen,

the report shows a problem for that item. (Refer

to “Cannot pass one of the tests for a sensor” on

page 3-18.)

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Chapter 3

Troubleshooting

Preparations for Troubleshooting

Before troubleshooting, check and, if necessary, correct the following points.

Paper is jammed inside the printer

CAUTION:

Be sure not to touch the manual cutter. Otherwise, you may cut your fingers.

1. Turn the power off.

2. Open the roll paper cover using the tab, as shown in the below illustration.

3. Remove the jammed paper.

Note:

If you turn the power off accidentally during printing, the cutter blade may stop in the paper feed path. So,

paper may not be fed normally at first when you turn the power on again. If the cutter blade does not

return to the normal position, the autocutter unit may be jammed. If so, follow the procedure described

below to repair the autocutter unit.

1. Power off the unit and open the roll paper cover.

2. Remove the jammed paper.

Roll paper cover

Tab

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3. Return the cutter blade to the normal position by rotating the autocutter knob in the

direction of the arrow. When the blade is returned to the normal position, the lever moves to

the center of the hole in the autocutter frame.

4. Lift up the roll paper cover.

Note:

❏Besides a paper jam, a foreign object, such as a push pin, can cause the autocutter to lock up. In

this case, follow the same procedure described above to return the cutter to its normal position.

Before Servicing

Pages iv to v at the beginning of this manual provide precautions you should observe to perform

work safely and supply 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 identify the area where a failure occurred.

❏See the tables in the section "Symptoms and Solutions" for diagnosing failures by the

symptom of the problem.

❏See "Test Points on the Main Circuit Board Unit" for failures on the main circuit board unit.

Autocutter unit

Lever

Hole

Knob

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Symptoms and Solutions

Symptoms when Power is On

POWER LED does not light

ERROR LED lights

Table 3-1 POWER LED not Lit

Probable part/probable cause Checkpoints Action to correct the problem

External power unit

Check the connections. Make sure the

connector is plugged in.

Plug in the connector. Completed if

the POWER LED lights.

Check the output voltage. Make sure

24 V is coming out.

Replace power unit. Completed if

the POWER LED lights.

Cable connector (1098)

Check the connectors. Make sure the

ones below are plugged in:

❑ Connector (CN10) on the main circuit

board unit (201)

❑ Connector (CNC3) on the sub circuit

board unit (123)

Plug in the connectors. Completed if

the POWER LED lights.

Sub circuit board unit (123) Check the sub circuit board unit for

damage. Make sure it looks normal.

Replace the sub circuit board unit

(123). Completed if the POWER LED

lights.

Main circuit board unit (201)

(Refer to page 3-21.)

Check the resistance value of fuses F1

and F4. Make sure neither fuse is blown.

If the circuit board has no damage,

such as burns, replace fuse F1 or F4.

Completed if the POWER LED lights.

If the fuse blows when power is

turned on, unplug all connectors

from the mechanism assembly (120)

and check again.

If the POWER LED does not light and

the fuse is blown, replace the main

circuit board unit.

Check the operation of SW1. Replace the main circuit board unit

(201). Completed if operation is

normal.

Check the power voltage. Make sure the

power voltage has proper voltage rating.

Table 3-2 ERROR LED On

Probable part/probable cause Checkpoints Action to correct the problem

Roll paper cover assembly (119)

Check the roll paper cover assembly.

Make sure the roll paper cover is

closed.

Close the roll paper cover assembly.

Completed if the ERROR LED turns off.

Paper-end state Check the roll paper. Load the roll paper properly.

Completed if the ERROR LED turns off.

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ERROR LED flashes

Table 3-3 ERROR LED Flashes

Probable part/probable cause Checkpoints Action to correct the problem

Home position detection error Check for jammed paper

around the carriage. Make sure

there is no paper jam.

Remove any jammed paper.

Completed if operation is normal.

Check the tension of the

carriage belt (507). Make sure

the carriage belt has

appropriate tension.

Adjust carriage belt tension (Refer to

page 5-6). Completed if operation is

normal.

Check operation of the parts

around the carriage by moving

the carriage from side to side.

Make sure the belt drive pulley

(505) rotates by moving the

carriage sub assembly (1025)

from side to side.

Reinstall the carriage belt (507) into

the carriage sub assembly (1025).

Completed if operation is normal.

Check the resistance value of

the carriage motor sub assembly

(1034). Make sure it is 7.2 Ω or

less.

Replace the carriage motor sub

assembly (1034). Completed if

operation is normal.

Check the operation of the HP

board assembly (518). Make sure

the signal changes when you

block the sensor.

Replace the HP board assembly

(518). Completed if operation is

normal.

Check the connection of main

circuit board unit (201)

connectors. Make sure they are

plugged in securely.

CN7: carriage motor sub

assembly (1034)

CN4: HP board assembly (518)

Plug in the connectors securely.

Completed if operation is normal.

Check if the parts on the main

circuit board unit (201) have any

damage. Make sure connector

CN7 and U8 look normal.

Replace the main circuit board unit

(201). Completed if operation is

normal.

R/W error in memory Check for repeatability. Make

sure operation is normal by

rebooting.

Replace the main circuit board unit

(201). Completed if operation is

normal.

High-voltage error Check the DC power voltage on

the main circuit board unit (201).

Make sure the power voltage

has the proper voltage rating.

(Refer to page 3-21.)

Replace the main circuit board unit

(201). Completed if operation is

normal.

Low-voltage error Check the DC power voltage on

the main circuit board unit (201).

Make sure the power voltage

has proper voltage rating. (Refer

to page 3-21.)

Replace the main circuit board unit

(201). Completed if operation is

normal.

Rev. B Troubleshooting 3-5

TM-U220 Type A Service Manual

Confidential

CPU execution error Check the connection of the I/F

circuit board unit (122). Make

sure the connector is plugged

into the main circuit board unit

(201).

Connect the I/F circuit board unit

(122). Completed if operation is

normal.

Check parts on the I/F circuit

board unit (122) for damage.

Make sure the I/F circuit board

unit appears normal.

Connect the I/F circuit board unit

(122). Completed if operation is

normal.

Check main circuit board unit

(201) parts for damage. Make

sure the main circuit board unit

(201) looks normal.

Replace the main circuit board unit

(201). Completed if operation is

normal.

Head high-temperature detection

circuit error

Check the print head

temperature. Make sure it is not

too high.

Wait for the print head temperature

to drop. Completed if operation is

normal.

Check connection of the head

FFC (521). Make sure it is plugged

into the print head unit (503) and

connector (CN9) on the main

circuit board unit (201).

Connect the head FFC (521).

Completed if operation is normal.

Check the continuity of the print

head unit (503). Make sure wires

are not broken or shorted out.

Connect the print head unit (503).

Completed if operation is normal.

Check if main circuit board unit

(201) parts have any damage.

Make sure the main circuit board

unit (201) looks normal.

Replace the main circuit board unit

(201). Completed if operation is

normal.

The ERROR LED flashes 3 or 6 times

and then does not operate all.

Check the setting of DIP SW2-6.

OFF: Initial state

ON: Rewriting flash memory.

Switch DIP SW2-6 on the main circuit

board unit (201) to OFF. Completed if

operation is normal.

If operation is not normal, rewrite the

firmware. Completed if operation is

normal.

Table 3-3 ERROR LED Flashes

Probable part/probable cause Checkpoints Action to correct the problem

3-6 Troubleshooting Rev. B

Confidential

PAPER OUT LED lights

Symptoms when the self-test is run

Self-test is not printed

Before running the self-test, make sure the roll paper and ribbon are installed correctly in the

printer. Then turn power off. To run the self-test, turn the power on while holding down the

FEED button. If the test does not print, check the following:

❏When the POWER LED does not light: Refer to page 3-3.

❏When the ERROR LED lights: Refer to page 3-3.

❏When the ERROR LED flashes: Refer to page 3-4.

Table 3-4 PAPER OUT LED is Lit

Probable part/probable cause Checkpoints Action to correct the problem

Roll paper

Check the roll paper. Make sure it is

loaded correctly. Make sure enough

paper is left.

Replace the roll paper. Completed if

the PAPER OUT LED turns off.

Paper end assembly (514)

Check operation of the paper end

assembly (514). Make sure the continuity

changes when you operate the switch.

Replace the paper end assembly

(514). Completed if the PAPER OUT

LED turns off.

Near-end sensor

Check operation of the micro switch

(1039). Make sure the continuity

changes when you operate the switch.

Replace the near-end sensor.

Completed if the PAPER OUT LED

turns off.

Main circuit board unit (201)

Check the parts for damage. Make sure

the following parts look normal.

CN6:for lead wires of the near-end

sensor

CN4:on the HP board assembly

Replace the main circuit board unit

(201). Completed if operation is

normal.

Rev. B Troubleshooting 3-7

TM-U220 Type A Service Manual

Confidential

When only the initializing operation is executed

The printer does not print

The print head operates, but paper is not fed

Table 3-5 Only the Initializing Operation Occurs

Probable part/probable cause Checkpoints Action to correct the problem

DIP switch setting

For the serial I/F, check the reset function

setting for pins # 6 and # 25. If the I/F

cable is connected and the reset

function is available, the I/F may always

be resetting.

Disable the reset function with the DIP

switch setting. Completed if

operation is normal.

Main circuit board unit (210)

Check the operation of SE2. Make sure

pressing the FEED button feeds paper.

Make sure the continuity changes when

you operate the switch.

Replace the main circuit board unit

(201). Completed if operation is

normal.

Table 3-6 The Printer Does not Print

Probable part/probable cause Checkpoints Action to correct the problem

Roll paper is inserted

incorrectly

Check the roll paper. Make sure it meets

specifications. Make sure it is loaded

correctly.

Load roll paper that meets

specifications. Completed if

operation is normal.

Paper jam Check the paper path. Make sure there

is no paper jam.

Open the roll paper cover assembly

and remove any jammed paper.

Completed if operation is normal.

Gear does not rotate

Check the gear operation. Make sure

the following gears rotate:

Paper feed gear (1063)

Paper feed middle gear B (510)

Paper feed middle gear (509)

Paper feed reduction gear 1 (1093)

Make sure the paper feed motor sub

assembly (1046) shaft rotates with

rotation of paper feed reduction gear 2

(1058).

Replace the defective gear.

Completed if operation is normal.

Paper hold spring (1014) Check the mounting state. Make sure it

is mounted correctly. (See page 4-18.)

Insert the paper hold spring (1014)

correctly. Completed if operation is

normal.

Paper hold roller (1015) Check operation. Make sure it rotates

smoothly.

Replace the paper hold roller (1015).

Completed if operation is normal.

Paper guide roller (1045)

Check the operation. Make sure the

roller rotates smoothly.

Clean, so that the paper guide roller

(1045) rotates correctly. Completed if

operation is normal.

Check for damage. You should see no

damage, such as wear.

Replace the mechanism assembly

(120). Completed if operation is

normal.

3-8 Troubleshooting Rev. B

Confidential

PF (paper feed) lead wire set

(1047)

Check the connectors. Make sure they

are plugged in securely:

Paper feed motor sub assembly (1046)

Connector (CN8) on the main circuit

board unit (201)

Plug in the connectors. Completed if

operation is normal.

Check the wires for breaks and shorts.

Make sure no wires are broken or

shorted out.

Replace the PF lead wire set (1047).

Completed if operation is normal.

Paper feed motor sub

assembly (1046)

Check the resistance value. Make sure it

is 7.2 Ω or less.

Replace the paper feed motor sub

assembly (1046). Completed if

operation is normal.

Main circuit board unit (201)

Check if the parts have any damage.

Make sure the following parts look

normal.

Connector (CN8)

Replace the main circuit board unit

(201). Completed if operation is

normal.

Table 3-6 The Printer Does not Print

Probable part/probable cause Checkpoints Action to correct the problem

Rev. B Troubleshooting 3-9

TM-U220 Type A Service Manual

Confidential

Paper is fed, but characters are not printed

Error occurs during printing

Table 3-7 Paper is Fed, but Characters do not Print

Probable part/probable cause Checkpoints Action to correct the problem

Ribbon cassette

Check the ribbon mounting. Make sure

it is installed correctly.

Load the ribbon cassette correctly.

Completed if operation is normal.

Check the ribbon. Make sure it is not

wrinkled, kinked, or broken.

Replace the ribbon cassette with a

new one. Completed if printing is

correct.

Head FFC (521) Check the continuity with a tester. Make

sure wires are not broken or shorted out.

Replace the head FFC (521).

Completed if printing is correct.

Print head unit (503) Check the continuity with a tester. Make

sure wires are not broken or shorted out.

Replace the print head unit (503).

Completed if printing is correct.

Main circuit board unit (201)

Check parts for damage. Make sure the

following parts look normal.

Connector (CN9)

QM22, QM23, QM24

Replace the main circuit board unit

(201). Completed if the print is correct.

Table 3-8 ERROR during Printing

Probable part/probable cause Checkpoints Action to correct the problem

Autocutter (AC) error

Check the connection of the

main circuit board unit (201)

connector. Make sure the AC

lead wire set (1090) is

connected.

Plug in the connector. Completed if

operation is normal.

Check the operation of the drive

gear sub assembly (1072). Make

sure it rotates with rotation of the

cutter motor sub assembly (117).

Replace the drive gear sub assembly

(1072). Completed if operation is

normal.

Check the operation of the

cutter motor sub assembly (117).

Replace the cutter motor sub

assembly (117). Completed if

operation is normal.

Check the operation of the

micro switch (121). Make sure

the continuity changes when

you operate the switch.

Replace the micro switch (121).

Completed if operation is normal.

Check the AC lead wire set

(1090) for breaks and shorts.

Make sure wires are not broken

or shorted out.

Replace the AC lead wire set (1090).

Completed if operation is normal.

Check fuse F3 on the main

circuit board unit (201). Make

sure it is not blown.

If the circuit board has no damage

such as burns, replace fuse F3.

Completed if operation is normal.

If the fuse blows again in operation of

the autocutter, replace the main

circuit board unit.

3-10 Troubleshooting Rev. B

Confidential

Check the parts on the main

circuit board unit (201) for

damage. Make sure the

following parts look normal.

Connector (CN2)

QM1

Replace the main circuit board unit

(201). Completed if operation is

normal.

Head high-temperature detection

circuit error

Check the print head

temperature. Make sure it is not

too high.

Wait for the print head temperature to

drop. Completed if operation is

normal.

Check the error frequency.

Make sure it does not occur too

often.

Replace the print head unit (503). If

the symptom continues, replace the

main circuit board unit (201).

Completed if operation is normal.

Roll paper cover open error

Check the state of the cover

when the error occurs. Be sure

not to open the roll paper cover

during printing.

If MSW 8-8 is OFF, close the roll paper

cover again. Completed if operation

is normal.

If the MSW 8-8 is ON, turn power on

again. Completed if operation is

normal.

If the error occurs when the roll paper

cover is not open, refer to “Cannot

pass one of the tests for a sensor” on

page 3-18.

Check the error frequency.

Make sure it does not occur too

often.

Replace the print head unit (503).

Completed if operation is normal. If

the symptom continues, replace the

main circuit board unit (201).

Completed if operation is normal.

Table 3-8 ERROR during Printing

Probable part/probable cause Checkpoints Action to correct the problem

Rev. B Troubleshooting 3-11

TM-U220 Type A Service Manual

Confidential

Paper is not cut correctly

Ribbon feed mechanism does not operate

Table 3-9 Cutter not Working Correctly

Probable part/probable cause Checkpoints Action to correct the problem

DIP switch setting

Check the setting of DSW 2-2.

OFF: Autocutter is disabled.

ON: Autocutter is enabled.

Switch DSW 2-2 to ON. Completed if

cutting is normal.

Full cut/partial cut setting

Check the full cut and partial cut

setting. Make sure the autocutter unit

(113) is mounted in the correct position.

Mount the autocutter unit (113) in the

correct position. Completed if cutting

is normal.

Fixed blade spring (1016)

Check the spring power. Make sure it

has enough power to push the fixed

blade (513) against the fixed blade

holder (1017).

Replace the fixed blade spring (1016).

Completed if cutting is normal.

Cutter blade

Check the fixed blade (513). Make sure

it does not have any nicks.

Replace the fixed blade (513).

Completed if cutting is normal.

Check the movable cutter blade on

the cutter frame assembly (114). Make

sure it does not have any nicks.

Replace the cutter frame assembly

(114). Completed if cutting is normal.

Table 3-10 Ribbon Feed Mechanism not Functioning Correctly

Probable part/probable cause Checkpoints Action to correct the problem

Ribbon cassette

Check the mounting. Make sure it is

installed correctly.

Install the ribbon cassette correctly.

Completed if printing is normal.

Check the ribbon cassette itself. Make

sure the ribbon is fed by turning the

tab.

Replace the ribbon cassette with a

new one. Completed if printing is

normal.

Ribbon take-up function

Check the take-up operation. Be sure

the following parts move with

operation of the carriage sub

assembly (1025):

❑ Belt drive pulley (505)

❑ Ribbon middle gear (512)

❑ Ribbon drive plate sub assembly

(517)

❑ Ribbon take-up gear sub assembly

(516)

Replace the defective gear.

Completed if the operation is normal.

Adjustment roller shaft holders

(506)

Check the platen gap adjustment.

0.45 mm: falls with no weight applied

0.55 mm: does not fall

Adjust the platen gap (refer to page

5-5). Completed if printing is normal.

3-12 Troubleshooting Rev. B

Confidential

Print result is not normal

Print is light or irregular

Print is dark

Dots are missing continuously

Table 3-11 Light or Irregular Print

Probable part/probable cause Checkpoints Action to correct the problem

Ribbon cassette

Check the ribbon mounting. Make

sure it is installed correctly.

Install the ribbon cassette correctly.

Completed if printing is normal.

Check the ribbon cassette. Make sure

the ribbon is fed by turning the tab.

Replace the ribbon cassette with a

new one. Completed if printing is

normal.

Ribbon take-up function

Check the take-up operation. Be sure

the following parts operate with

operation of the carriage sub

assembly (1025)

❑ Belt drive pulley (505)

❑ Ribbon middle gear (512)

❑ Ribbon drive plate sub assembly

(517)

❑ Ribbon take-up gear sub assembly

(516)

Replace the defective gear.

Completed if the operation is normal.

Adjustment roller shaft holders

(506)

Check the platen gap adjustment.

0.45 mm: falls with no weight applied

0.55 mm: does not fall

Adjust the platen gap (refer to page

5-5). Completed if printing is normal.

Table 3-12 Dark Print

Probable part/probable cause Checkpoints Action to correct the problem

Adjustment roller shaft holders

(506)

Check the platen gap adjustment.

0.45 mm: falls with no weight applied

0.55 mm: does not fall

Adjust the platen gap (refer to

page 5-5). Completed if printing

is normal.

Table 3-13 Missing Dots

Probable part/probable cause Checkpoints Action to correct the problem

Head FFC (521) Check the continuity with a tester. Make

sure no wires are broken or shorted out.

Replace the head FFC (521).

Completed if printing is normal.

Print head unit (503)

Check the continuity with a tester. Make

sure no wires are broken or shorted out. Replace the print head unit

(503). Completed if printing is

normal.

Check the state of the dot wires. Make sure

they are not broken.

Rev. B Troubleshooting 3-13

TM-U220 Type A Service Manual

Confidential

Line spacing is irregular

Two-color printing is not performed, or colors are mixed

Table 3-14 Irregular Line Spacing

Probable part/probable cause Checkpoints Action to correct the problem

Roll paper is inserted

incorrectly

Check the roll paper. Make sure it meets

specifications and is loaded correctly.

Load roll paper that meets

specifications correctly. Completed if

operation is normal.

Paper jam Check the paper path. Make sure there

is no paper jam.

Open the roll paper cover and

remove the paper jam. Completed if

operation is normal.

Gear does not rotate

Check gear operation. Make sure the

following gears rotate with each other.

Paper feed gear (1063)

Paper feed middle gear B (510)

Paper feed middle gear (509)

Paper feed reduction gear 1 (1093)

Make sure the shaft of platen assembly 3

(522) rotates with the rotation of paper

feed reduction gear 2 (1058).

Replace the defective gear.

Completed if operation is normal.

Paper hold spring (1014)

Check the spring mounting. Make sure it

is mounted correctly. (Refer to page 4-

18)

Insert the paper hold spring (1014)

correctly. Completed if operation is

normal.

Paper hold roller (1015) Check operation. Make sure it rotates

smoothly.

Replace the paper hold roller (1015).

Completed if operation is normal.

Paper guide roller (1045) Check operation. Make sure it rotates

smoothly.

Clean, so the paper guide roller

(1045) rotates correctly. Completed if

operation is normal.

Table 3-15 Printing is not Two-color, or Colors are Mixed

Probable part/probable cause Checkpoints Action to correct the problem

Ribbon cassette

Check the ribbon type. Make sure it is for

2-color printing.

Replace the ribbon cassette with one

for 2-color printing. Completed if

printing is normal.

Check the mounting. Make sure the

ribbon is installed correctly.

Install the ribbon cassette correctly.

Completed if printing is normal.

Two-color shift function

Check the mounting of the spring. Make

sure the following springs are mounted

correctly.

Ribbon take-up spring (1088)

Ribbon frame spring (1022)

Mount the springs correctly.

Completed if printing is normal.

3-14 Troubleshooting Rev. B

Confidential

Printed contents are not normal

Paper jam occurs

Table 3-16 Abnormal Printing Content

Probable part/probable cause Checkpoints Action for the problem

Firmware version

Check the version number. (See page 2-1.)

Make sure it is the same as the version used

by the customer, or the latest version.

Update the firmware. Completed

if printing is normal.

Boot version

Check the version number. (See page 2-1.)

Make sure it is the same as the version used

by the customer, or the latest version.

Update the firmware. Completed

if printing is normal.

DIP switch settings

Check the DIP switch settings printed. Make

sure the following items are same as the DIP

switch settings. (See page 5-7.)

Serial Interface (when serial I/F is installed)

Receive buffer capacity

Receive buffer full release condition

Handshaking operation

Characters per line (CPL)

Autocutter unit

If they are not correct, check the continuity

of the DIP switch.

Replace the main circuit board

unit (201). Completed if printing is

normal.

Resident character

Check the resident character set. Make sure

it is same as the character set used by the

customer.

Update the firmware. Completed

if printing is normal.

Check if this error message is printed:

### ERROR ###

If so, the multilingual font is not correct. Please

download the correct one. Make sure the

message above is not printed.

Update the firmware.

Completed if printing is normal.

If printing is not normal, replace

the main circuit board unit (201).

Paper width

Check the print item corresponding to the

paper width. Make sure the entire area of

the paper width is printed.

Match the paper width setting to

the paper width. Completed if

printing is normal

Table 3-17 Paper Jams

Probable part/probable cause Checkpoints Action to correct the problem

Roll paper is inserted

incorrectly

Check the roll paper. Make sure it meets

specifications and is loaded correctly.

Load roll paper that meets

specifications correctly.

Completed if operation is normal.

Fixed blade (513) Check for defects. Make sure you see no

defects, such as deformation.

Replace the fixed blade (513).

Completed if operation is normal.

Paper hold rollers (1015) Check operation. Make sure the 2 rollers

rotate smoothly.

Replace the paper hold roller(s)

(1015). Completed if operation is

normal.

Rev. B Troubleshooting 3-15

TM-U220 Type A Service Manual

Confidential

Printing is loud

Symptoms when the All Function Test is Executed

When an error occurs during printing: Refer to page 3-9.

When paper is cut incorrectly: Refer to page 3-11.

Paper guide rollers (1045)

Check operation. Make sure the 2 rollers

rotate smoothly.

Clean, so that both paper guide

rollers (1045) rotate correctly.

Completed if operation is normal.

Check for defects. Make sure you see no

defects, such as wear.

Replace the mechanism

assembly (120). Completed if

operation is normal.

Roll paper holder plate (508) Check for defects. Make sure you see no

defects, such as deformation.

Replace the roll paper holder

plate (508). Completed if

operation is normal.

Table 3-18 Noisy Printing

Probable part/probable cause Checkpoints Action for the problem

Roll paper is inserted

incorrectly

Check the roll paper. Make sure it meets

specifications and is loaded correctly.

Load roll paper that meets

specifications correctly.

Completed if printing noise is

reduced.

Adjustment roller shaft holders

(506)

Check the platen gap adjustment.

0.45 mm: falls with no weight applied

0.55 mm: does not fall

Adjust the platen gap. (Refer to

page 5-5.) Completed if the

printing noise is reduced.

Table 3-17 Paper Jams

Probable part/probable cause Checkpoints Action to correct the problem

3-16 Troubleshooting Rev. B

Confidential

Communication test fails

Printing is not normal

When print is light or irregular: Refer to page 3-12.

When print is dark: Refer to page 3-12.

When dots are missing continuously: Refer to page 3-12.

When line spacing is irregular: Refer to page 3-13.

When two-color printing is not performed, or the colors are mixed: Refer to page 3-13.

Table 3-19 Communication Test Failure

Probable part/probable cause Checkpoints Action to correct the problem

Communication condition

Check the communication settings. Make

sure the settings printed by the self-test are

the same as the communication settings

shown by the service utility.

Set the correct communication

settings. Completed if operation is

normal.

I/F cable

Check the I/F cable connection. Make

sure the I/F cable is plugged in securely.

Plug in the I/F cable correctly.

Completed if operation is normal.

Check the continuity with a tester. Make

sure no wires are cut or shorted out. Be

sure the cable is wired correctly.

Replace the I/F cable. Completed

if operation is normal.

I/F circuit board unit (122)

Check the connection. Make sure the

connector is plugged in securely.

Connect the I/F circuit board unit

(122). Completed if operation is

normal.

Check the parts for defects.

Replace the I/F circuit board unit

(122). Completed if operation is

normal.

Main circuit board unit (201)

Check parts on the main circuit board unit

(201) for defects. Make sure connector

(CN1) is connected.

Replace the main circuit board unit

(201). Completed if operation is

normal

Rev. B Troubleshooting 3-17

TM-U220 Type A Service Manual

Confidential

Printed output is not normal

Drawer 1 or 2 is not kicked out

Table 3-20 Abnormal Output is Printed

Probable part/probable cause Checkpoints Action to correct the problem

Communication setting

When a question mark (?) is printed,

check communication settings. Make

sure DTR/DSR control is selected by DIP

switch or memory switch.

Select DTR/DSR control. Completed

if ? is not printed.

I/F cable

When a question mark (?) is printed,

check the continuity of the I/F cable with

a tester. Make sure DTR/DSR cross.

Replace the I/F cable. Completed if

the operation is normal.

Printer information setting

Check the printer information setting.

Make sure the following information is

printed:

Maker name: “EPSON”

Printer name: ”TM-U220”

Serial No: Serial number on the

manufacturer’s plate

Set again, using the printer status

function. Completed if printing is

normal.

Memory switch setting

Check the memory switch setting. Make

sure it is the same as the setting used by

customer. If you do not know the

customer’s setting, make sure it is in the

factory default state. (Refer to page 5-10.)

Set again, using the printer status

function. Completed if printing is

normal.

Table 3-21 Drawer 1 or 2 not Kicked Out

Probable part/probable cause Checkpoints Action to correct the problem

Drawer kick

Check the connection. Make sure the

cable is plugged in securely. Check each

leading pin for drawer 1 or drawer 2.

Plug in the connector. Completed if

the drawer is kicked out.

Sub circuit board unit (123)

Check board parts for defects.

Make sure connectors (CNC2 and CNC3)

are connected securely.

Replace the sub circuit board unit.

Completed if the drawer is kicked

out.

Main circuit board unit (201)

Check the parts for defects.

Verify the parts below.

Connector (CN10)

Element (U7)

Replace the main circuit board unit.

Completed if the drawer is kicked

out.

3-18 Troubleshooting Rev. B

Confidential

Cannot pass one of the tests for a sensor

Cannot pass the NE (near-end) sensor test

Cannot pass the test for the RE (real end) sensor

Table 3-22 Test for the NE Sensor Fails

Probable part/probable cause Checkpoints Action to correct the problem

NE lead wire set (1096)

Check connection. Ensure cable is

plugged in. Be sure the NE lead wire set

(1096) is connected to the connectors

below.

Micro switch (1039)

Connector (CN6) on the main circuit

board unit (201)

Plug in the connector. Completed if

the test passes.

Check the continuity with a tester. Make

sure wires are not cut or shorted out. Verify

that wires are arranged correctly.

Replace the NE lead wire set.

Completed if the test passes.

Micro switch (1039)

Check micro switch (1039) operation.

Make sure the continuity changes when

you operate the switch.

Replace the near-end sensor.

Completed if the test passes.

NE detector holder (1042)

NE detector lever (1043)

Check the operation. Make sure the NE

detector lever rotates smoothly.

Replace the NE detector holder or

lever. Completed if the test passes.

Main circuit board unit (201)

Check the parts for defects.

Make sure connectors (CNC2 and CN6)

are connected.

Replace the main circuit board unit.

Completed if the test passes.

Table 3-23 Test for the RE Sensor Fails

Probable part/probable cause Checkpoints Action to correct the problem

HP board assembly (518)

Check the connection. Make sure the

cable is plugged in. Make sure the

connector on the HP board assembly

(518) is connected to connector (CN4) on

the main circuit board unit (201).

Plug in the connector. Completed if

the test passes.

Check the continuity with a tester. Make

sure wires are not cut or shorted out. Be

sure wiring is arranged correctly.

Replace the HP board assembly

(518). Completed if the test passes.

Paper end assembly (514)

Check the continuity of paper end

assembly (514) wires with a tester. Make

sure wires are not cut or shorted out. Be

sure wiring is arranged correctly.

Replace the paper end assembly.

Completed if the test passes.

Main circuit board unit (201) Check the parts for defects.

Make sure connector (CN4) is connected.

Replace the main circuit board unit.

Completed if the test passes.

Rev. B Troubleshooting 3-19

TM-U220 Type A Service Manual

Confidential

Cannot pass the test for the roil cover

Cannot pass the test for the paper FEED button

Cannot pass the test for drawer 3 status

Table 3-24 Paper Roll Cover Test Fails

Probable part/probable cause Checkpoints Action to correct the problem

Memory switch setting

Check the setting of MSW 8-5. If the

setting is OFF, status is not sent from the roll

cover, but the RE sensor is changed.

Confirm if the setting status is ON.

Change the setting of MSW 8-5 to

ON. Completed if the test passes.

HP board assembly (518)

Check the connection. Make sure the

cable is plugged in. Make sure the

connector on the HP board assembly

(518) is connected to connector (CN4) on

the main circuit board unit (201).

Plug in the connector. Completed if

the test passes.

Check the continuity with a tester. Make

sure wires are not cut or shorted out. Be

sure wires are arranged correctly.

Replace the HP board assembly

(518). Completed if the test passes.

Cover open assembly (515)

Check the continuity of the wires for the

cover open assembly (515) with a tester.

Be sure wires are not cut or shorted out. Be

sure wires are arranged correctly.

Replace the cover open assembly.

Completed if the test passes.

Main circuit board unit (201) Check the parts for defects.

Make sure connector (CN4) is connected.

Replace the main circuit board unit.

Completed if the test passes.

Table 3-25 Paper FEED Button Test Fails

Probable part/probable cause Checkpoints Action to correct the problem

Main circuit board unit (201)

Check the operation of SW2. Make sure

roll paper is fed when you press the paper

FEED button. Make sure the continuity

changes when you press the button.

Replace the main circuit board unit.

Completed if the test passes.

Table 3-26 Drawer 3 Status Fails

Probable part/probable cause Checkpoints Action to correct the problem

Drawer kick

Check the connection. Make sure the

cable is plugged in. Check each leading

pin for drawer 1 or drawer 2.

Plug in the connector. Completed if

the drawer is kicked out.

Sub circuit board unit (123)

Check the parts for defects.

Make sure connectors (CNC2 and CNC3)

are connected.

Replace the sub circuit board unit.

Completed if the drawer is kicked

out.

Main circuit board unit (201)

Check the parts for defects.

Make sure connector (CN10) is

connected.

Replace the main circuit board unit.

Completed if the drawer is kicked

out.

3-20 Troubleshooting Rev. B

Confidential

Symptoms for other operations

Parts do not move smoothly

Cannot take up the roll paper smoothly

Cannot open and close he ribbon cover smoothly

Cannot open and close the roll paper cover assembly smoothly

The case is dirty

Use a dry cloth or one lightly moistened with water to clean case. Be sure to disconnect the

power cord from the wall outlet before doing this.

Avoid using alcohol, benzene, thinner, trichloroethylene, or ketone-based substances to remove

dirt or foreign matter from the printer, because these substances can affect or damage plastic and

rubber parts.

Table 3-27 Opening and Closing the Roll Paper Cover Assembly is not Smooth

Probable part/probable cause Checkpoints Action to correct the problem

Paper take-up shaft assembly

(134)

Confirm that the paper take-up assembly

is attached correctly. Make sure parts are

located in the correct positions.

Confirm that the paper take-up shaft

assembly (134) is attached correctly.

Completed if the paper is taken up

correctly when you press the paper

FEED button.

Take-up belt (523)

Confirm that the belt is attached and has

no defects, such as wear and

deformation. Be sure the belt is located in

the correct position.

Confirm that the take-up belt (523) is

attached correctly. Completed if the

belt is driven correctly.

Table 3-28 Opening and Closing the Ribbon Cover is not Smooth

Probable part/probable cause Checkpoints Action to correct the problem

Ribbon cover (109)

Confirm the condition of 2 projections

on the cover. Make sure neither is

broken.

Replace the ribbon cover (109).

Completed if the cover opens and

closes smoothly.

Table 3-29 Opening and Closing the Roll Paper Cover Assembly is not Smooth

Probable part/probable cause Checkpoints Action to correct the problem

Frame rotation spacer (1050) Confirm that the spacer is fixed. Make

sure it is located in the correct position.

Confirm that the frame rotation

spacer is attached correctly.

Completed if cover opens and closes.

Rotation springs Confirm spring attachment. Make sure

they are located in the correct positions.

Confirm that rotation spring R (1006) is

attached correctly. Completed if

cover opens and closes.

Platen release spring (1056) Confirm spring attachment. Make sure it

is located in the correct position.

Confirm that the platen release spring

(1056) is attached correctly.

Completed if cover opens and closes.

Hook spring C (1092) Confirm spring attachment. Make sure it

is located in the correct position.

Confirm that hook spring C (1092) is

attached correctly. Completed if

cover opens and closes.

Rev. B Troubleshooting 3-21

TM-U220 Type A Service Manual

Confidential

Test Points on the Main Circuit Board Unit

Table 3-30 Test Points on the Main CIrcuit Board Unit

Power supply Pin name Status Test

connector Component

connector Correct

value

Power supply

Semiconductor switch on — — U9, pin 3 or pin 4 5 V

Semiconductor switch off — — Q1, pins 5 or 6 or

7 or 8

24 V

Logic circuit power

supply

Logic circuit power

supply

— — U9, pin 5 3.3 V

Logic circuit power

supply (GND)

— — Bottom

assembly frame

0 V

Mechanism power

supply

Autocutter (117) power

supply

— — F3 24 V

Print head power supply — — Q7, pins 5 or 6 or

7 or 8

24 V

Roll paper cover open

sensor (515) power

supply

Cover opened —

CN4, pin 5

3.3 V

Cover closed — 0 V

HP sensor (518) power

supply

On home position —

CN4, pin 2

0 V

Not on home

position

— 3.3 V

NE sensor (1096) power

supply

Sufficient roll paper

installed

—

CN6, pin 1

3.3 V

Sufficient roll paper

not installed

—0 V

RE sensor (514) power

supply

Roll paper installed —

CN4, pin 4

0 V

Roll paper not

installed

— 3.3 V

Drawer power

supply

— — — CNC3, pin 5 24 V

3-22 Troubleshooting Rev. B

Confidential

The locations of the main elements on the main circuit board unit are identified below.

Resistance Values of Printer Mechanism Components

Part Name Internal Element Function Where to Check Normal Status

Carriage motor

(1034)

4-phase stepping motor Head carriage

drive

Remove the cable connector

connected to CN7 on the

main circuit board. Test

between pin 1 and pin 3 and

between pin 2 and pin 4.

Approx. 7.2 Ω

(per 1 phase)

Receipt paper

feed motor

(1046)

4-phase stepping motor Receipt paper

feed

Remove the cable connector

connected to CN8 on the

main circuit board. Test

between pin 1 and pin 3 and

between pin 2 and pin 4.

Approx. 7.2 Ω

(per 1 phase)

CN8

CN7

CN6

CN4

Rev. B Disassembly and Assembly 4-1

TM-U220 Type A Service Manual

Confidential

Chapter 4

Disassembly and Assembly

This chapter gives instructions to disassemble and assemble the product. Also, the text explains

maintenance and cleaning.

Lubricants

Lubrication is critical to retaining the printer at its initial performance level throughout its life, as

well as avoiding potential problems. Always lubricate at prescribed intervals, using the correct

lubricants.

Standard Lubrication

❏During disassembly and reassembly, clean the parts first, then lubricate them.

❏Lubricate or overhaul after every 7.5 million lines printed.

Lubricants

The types of lubricants used greatly affect the printer’s performance and durability, and a

lubricant’s low-temperature characteristics require special attention. EPSON has conducted

thorough analyses of the technical data and wide-ranging experimentation on different

lubricants. The EPSON selection of lubricants prescribed for use with the printer is based on the

results of such research. The prescribed EPSON lubricants are available in 40 cc (40 gr) metal

cans or plastic containers (the smallest unit of supply).

The three types of lubricants used with this printer are G-15, G-36, and O-13.

Lubrication Points

The table on the next page describes the lubrication points, types, and classes. Also see the

explanations contained in the diagrams in this chapter.

Tool List

❏Use the tools below for assembly, disassembly, and adjustment.

Items Parts code Note

Gap gauge 1080567 Size: 0.45 mm

1080568 Size: 0.55 mm

Tension gauge 1213123 —

E-ring holder 1074111 Size: 2.3

1080545 Size: 3

1080546 Size: 4

4-2 Disassembly and Assembly Rev. B

Confidential

❏Use the grease or oil types indicated below for lubrication.

❏Use items in the list below when operating the printer.

Notes for Assembly and Disassembly

❏For assembly, reverse the procedures described under “Disassembly.”

❏The



symbol in the disassembly procedure indicates that the item needs to be

checked.

❏The

symbol in the disassembly procedure indicates an item that needs to be

lubricated.

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.

❏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. Hold circuit boards only by their

edges.

❏Always remove the power supply unit from the printer before working. Power is

flowing to the internal circuit boards even if you turn the printer off at the power

supply switch. You may damage the printer if you work while the power supply is still

attached.

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

❏Do not perform any work that is not described in this chapter. Doing so may result in

injury or damage to the printer.

Items Parts code Note

Oil 1041442 O-13

Grease 1080605 G-15

1080619 G-36

Items Parts code Note

AC adapter 2081786 —

Ribbon cassettes S0152440000 ERC-38 (B)

S0152450000 ERC-38 (B/R)

S0152460000 ERC-38 (P)

Rev. B Disassembly and Assembly 4-3

TM-U220 Type A Service Manual

Confidential

Shortest Route for Disassembly of Major Parts

The diagram below shows the shortest route for disassembly of major parts. Perform

disassembly by following this diagram as well as the explanations for the target item.

How to use the key map:

1. Find the component enclosed in a box with solid black lines (not dotted lines) that

you want to remove.

2. Trace the line upward from that component to START.

3. You need to remove all components or units in the path back to START.

Note that the steps for disconnecting cables and removing plates on the units are not

described in this key map.

4-4 Disassembly and Assembly Rev. B

Confidential

Disassembling the TM-U220

Exploded diagram

128

W01S02

119

106

S02

127

113

S13

S02

1092

S03

122

S03 S03

S03

102

129

130

139

1110

S03

139

131

135

136

1111136

1084

109

110 111

126

S03

120

1085

123

S01

S01 201 S03

S03

112

1004

1095

S01

107

523

108

134

127

1099

S02

107

S02

S03

Rev. B Disassembly and Assembly 4-5

TM-U220 Type A Service Manual

Confidential

Disassembly Procedures

Disassembly

steps Part names Disassembly procedures

❶Roll paper cover

assembly (119)

❏Open the roll paper cover assembly (119).

❏Push and take out the open lever shaft (1001), and then

remove 1 screw (S02).

❏Release the hooks in 3 positions as shown in the diagram, and

remove 2 screws (S03).

❏Remove the roll paper cover assembly (119).

When removing the roll paper cover assembly, release the 3

hooks. (See page 4-16.)

❷Top case (108) ❏Remove 2 screws (S03).

❏Open the ribbon cover (109).

❏Remove the top case (108) and ribbon cover (109) together.

When attaching the top case be sure not to catch the cables

in the frame. (See page 4-19.)

❸Back case (130)

Paper take-up gear

assembly (1110)

Take-up belt (523)

❏Remove 2 screws (S02). After that, remove the back case (130).

❏Remove the paper take-up gear assembly (1110).

When attaching the paper take-up gear assembly (1110), be sure

that the take-up gear shaft (139) is attached from the correct

direction.

❹I/F circuit board unit

(122)

❏Remove the I/F circuit board unit (122).

❺Bottom plate (1004) ❏Remove 4 screws (S03),and remove the bottom plate (1004).

❻Main circuit board unit

(201)

❏Remove connectors attached to the main circuit board unit

(201).

❏Remove 4 screws (S01), and remove the main circuit board unit

(201).

When reattaching each cable to the main circuit board, be

sure each cable is attached correctly. (See page 4-27.)

Sub circuit board unit

(123)

❏Remove 2 screws (S01), and remove the sub circuit board unit

(123).

❼ Autocutter unit (113) ❏Remove 2 screws (S02), and remove the autocutter unit (113).

When attaching the autocutter, confirm that the cutting

pattern is selected correctly (partial cut or full cut). (See page

5-4.)

❽Bottom frame

assembly (1085)

❏Remove 4 screws (S02), and remove the bottom frame

assembly (1085). After that, remove the mechanism assembly

(120).

4-6 Disassembly and Assembly Rev. B

Confidential

Disassembling the Mechanism Assembly

Exploded diagram

1108

1010

1038

137

1125

E01

S11

1005

E01 S07 S07

1013

1047

S11

1046

515 S11502

1018

S11

S11 S05

E03

1009

S05

E02

S051119

1105

1011

1112 1049

E02

1050

1006

S05

S08W02

1106

S05

523

138

S15

S02

E04

E01

1093

139

1110

131

1104

1114

1129

Rev. B Disassembly and Assembly 4-7

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures

Disassembly

steps Part names Assembly procedures

Take-up belt (523) ❏Remove the back case (130).

❏Remove the take-up gear shaft (139). After that, remove the

paper take-up gear assembly (131).

❏Remove the take-up belt (523).

When reattaching the take-up gear shaft (139) and take-up

belt (523), be sure the shaft is attached correctly. (See page 4-

22.) Also, when attaching platen rotation plate 2 (137), be sure

the plate is attached correctly. (See page 4-20.)

❶Platen rotation frame

2 (1125)

Frame rotation unit

(1005)

❏Remove the cutter rotation plate (1129).

❏Remove platen rotation frame 2 (1125).

❏With platen rotation frame 1 unit closed, remove E-ring 3 (E01).

❏Release rotation spring R (1006) from the hooks.

❏Remove E-ring 4 (E03), and remove the rotation shaft (1009).

❏Remove the frame rotation unit (1005).

Remove the unit while spreading its sides to the right and left.

(See page 4-10.)

6Lubricate the frame rotation unit (1005) with G-36.

Cutter support frame

(1108)

❏Remove 2 screws (S02), and remove the cutter support frame

(1108).

6Lubricate the cutter support frame (1108) with G-15.

❷Fixed blade holder

assembly (1013)

❏Remove 2 screws (S11), and remove the fixed blade holder

assembly (1013).

❸Roll paper guide unit

(1038)

❏Remove 2 screws (S05), and remove the roll paper guide

(1038).

❹Roll paper holder

(1010)

❏Remove 2 screws, and remove the back case (130).

❏Remove 2 screws (S08), and remove 5 screws (S05) with 1

washer (W02), and then remove the roll paper holder (1010).

❺Cover open assembly

(515)

❏Remove 1 screw (502) securing the cover open assembly (515).

Paper feed motor sub

assembly (1046)

❏Remove 2 screws (S11), and remove the paper feed motor sub

assembly (1046).

❻Platen fixing shaft R

(1049)

Middle take-up gear

(1106)

❏Remove 1 E-ring 2.3 (E02), and remove platen fixing shaft R

(1049) and the middle take-up gear (1106).

6Lubricate platen fixing shaft R (1049) with G-36.

Take-up transmission

shaft (1112)

Take-up transmission

gear (1105)

❏Remove 1 E-ring 2.3 (E02), and remove the take-up transmission

shaft (1112) and take-up transmission gear (1105).

6Lubricate the take-up transmission shaft (1112) with G-36.

Base frame (1011) After this, you can remove the base frame (1011).

6Lubricate the base frame (1011) with G-36.

4-8 Disassembly and Assembly Rev. B

Confidential

Disassembling the Carriage Unit

Exploded diagram

520

519

1022

1089

521

S06 503

1025

1081

S14

S12

507

E02

1029

1086

E01

E02

517

512

505

516

S11

518

506

1011

1128

1026

1097

1030

E03

1128

1034

S09 S09 506

1027

Rev. B Disassembly and Assembly 4-9

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures

Reassembly

steps Part names Assembly procedures

❶Ribbon frame

assembly (519)

❏Remove the ribbon frame spring (1022).

❏Remove 1 E-ring 4 (E03), and remove the ribbon frame assembly

(519).

❏After this, you can remove the print head unit (503).

6Lubricate the carriage sub assembly (1025) with O-13.

❷Carriage sub

assembly (1025)

Carriage belt (507)

Head FFC (521)

❏Remove the right and left adjustment roller shaft holders (506).

❏Pull out the carriage shaft (1027).

❏Remove the head FFC (521) from the carriage sub assembly

(1025).

❏Loosen 2 screws (S12, S14) securing the belt tension plate sub

assembly (1086).

❏Remove the carriage belt (507), together with the carriage sub

assembly (1025).

❏Remove the belt tension plate sub assembly (1086).

❏Remove the head FFC (521).



Note for replacing the adjustment roller shaft holders (See page 4-22):

When you need to remove the adjustment roller shaft holders (506),

you must replace each holder with a new part. This is necessary

because the part changes when you remove it.

Note for attaching the carriage sub assembly (1025) (See page 4-24):

When you reassemble the carriage sub assembly (1025), you also

need to adjust the unit’s platen gap. (See page 5-5.)

Note for attaching the carriage belt (507) (See page 4-23):

When you reattach the carriage belt, adjust its tension. (See page 5-

6.)

Confirm the head FFC (521) is connected correctly. (See page 4-23.)

6Lubricate the carriage sub assembly (1025) with O-13.

6Lubricate the belt tension plate sub assembly (1086) with G-36.

❸Carriage guide plate

(1030)

Carriage guide plate

sub assembly (1026)

❏Remove 2 screws (S11), and remove the carriage guide plate

(1030).

❏Remove the carriage guide plate sub assembly (1026).

6Lubricate the carriage guide plate (1030) and the belt tension

plate sub assembly (1086) with G-36.

❹Ribbon drive plate

sub assembly (517)

Ribbon middle gear

(512)

Ribbon take-up gear

sub assembly (516)

Belt drive pulley (505)

❏Remove 1 E-ring 2.3 (E02), and remove the ribbon drive plate sub

assembly (517).

❏Remove the ribbon middle gear (512).

❏Remove the ribbon take-up gear sub assembly (516).

❏Remove 1 E-ring 3 (E01), remove the belt drive pulley (505).

❺Carriage motor sub

assembly (1034)

❏Remove 2 screws (S09), and remove the carriage motor sub

assembly (1034).

❻HP board assembly

(518)

❏Remove 1 screw (S11), and remove the HP board assembly (518).



When replacing the HP board assembly (518), you need to

remove the solder. Resolder when attaching the HP board

assembly (518). (See page 4-24.)

Base frame (1011) After this, you can remove the base frame (1011).

6Lubricate the base frame (1011) with G-15 and G-36.

4-10 Disassembly and Assembly Rev. B

Confidential

Disassembling the Rotation Frame Unit

Exploded diagram

524

1061

510 1055

E01

1056

S09

1058

E01

509

1057

1053 1054

E01

504

S10

1125

S09

140

S10

S09

E01

Rev. B Disassembly and Assembly 4-11

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures

Reassembly

steps Part names Assembly procedures

❶Platen release lever

(504)

❏Remove 2 E-rings 3 (E01), and remove the platen release lever

(504) and platen shaft (1054).

6Lubricate the platen shaft (1054) with G-15.

❷Gear plate D sub

assembly (1057)

Paper feed middle gear

(509)

Paper feed middle gear

B (510)

❏Remove 2 screws (S10), and remove the gear plate D sub

assembly (1057).

❏Remove 1 E-ring 3 (E01), and remove the paper feed reduction

gear 2 (1058).

❏Remove the paper feed middle gear (509) and paper feed

middle gear B (510).

6Lubricate the gear plate D sub assembly (1057) with G-15.

❸Platen assembly 3 (522) ❏Remove 1 E-ring 3 (E01), and pull out the platen shaft (1054).

❏In doing so, remove the paper feed middle gear B (510), the

platen release plate (1055), and the platen release lever (504)

together. Take care not to lose the platen release spring

(1056).

❏Remove platen assembly 3 (522).

❏Remove 1 screw (S09), and remove the bottom holding plate

BM (1061).

When installing the frame rotation unit (1005) on the base

frame assembly, check how to lead the autocutter unit (113)

cable. (See page 4-19.)

❹Platen frame (1053) ❏Remove 3 screws (S10), and remove the platen frame (1053).

Platen rotation frame 2

(1125)

After this, you can remove the platen rotation frame 2 (1125).

6Lubricate the platen rotation frame 2 (1125) with G-15.

4-12 Disassembly and Assembly Rev. B

Confidential

Disassembling the Roll Paper Guide / Roll Paper Holder

Exploded diagram

514

1040

1041

1101

1039

1042

1096

1043

1126

1045

1010

1038

508

S08

Rev. B Disassembly and Assembly 4-13

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures

Use the steps below for disassembling the roll paper holder.

Use the steps below for disassembling the roll paper guide.

Reassembly

steps Part names Assembly procedures

❶Paper end assembly

(514)

❏Remove the paper end assembly (514).

When replacing the paper end assembly (514), you need to

pull out the wire attached on the HP circuit board. (See page

4-24.)

❷Roll paper holder (1010) ❏Remove 2 screws (S05), and remove the roll paper holder

plate (508).

❏Remove the roll paper holder (1010).

Reassembly

steps Part names Assembly procedures

❶NE lead wire set (1096) ❏Remove the NE lead wire set (1096).

Paper end assembly

(514)

❏ Remove the paper end assembly (514).

❷Roll paper guide (1038) ❏Turn the detector adjustment screw (1040), and remove the

NE detector assembly (1041) and the nut (1126). Then, remove

the roll paper guide (1038).

4-14 Disassembly and Assembly Rev. B

Confidential

Disassembling the Autocutter Unit / Fixed Blade Holder Assembly

Exploded diagram

1102

104

1071

S04

115

1090

118

117

103

105

121

114

513

1016

1017

1127

1015

1014

Rev. B Disassembly and Assembly 4-15

TM-U220 Type A Service Manual

Confidential

DIsassembly Procedures

Use the steps below for disassembling the autocutter unit.

Follow the steps below to disassemble the fixed blade holder assembly.

Reassembly

steps Part names Assembly procedures

❶Cutter cover

assembly (115)

❏Remove the cutter cover assembly (115).

6Lubricate the cutter frame assembly (114) with G-36.

❷Cutter motor sub

assembly (117)

Micro switch (121)

❏Remove 1 screw (S04), and remove the cutter motor sub assembly

(117).

❏Remove 1 screw (105), and remove the micro switch (121).

❏Remove 2 guard tubes C (118).

When removing a guard tube C (118), you need to pull out the wire

attached to the motor. (See page 4-19.)

6Lubricate the paper hold roller (1015) with G-36.

Reassembly

steps Part names Assembly procedures

❶Fixed blade (513) ❏Remove the fixed blade (513).

❏Remove the fixed blade spring (1016).

❏Remove the fixed blade holder (1017).

When you replace the paper hold roller (1015), you need to remove

1 E-ring 2.3 (E02).

❷Paper hold roller

(1015)

❏Remove the paper hold roller (1015) and the paper hold roller shaft

(1102).

❏Remove the paper hold spring (1014).

When installing the paper hold spring (1014), check how to attach

the hook. (See page 4-18.)

6Lubricate the paper hold roller (1015) with G-36.

4-16 Disassembly and Assembly Rev. B

Confidential

Disassembly and Assembly Reference

Removing the Roll Paper Cover Assembly

Removing and Attaching the Top Case

1. Push the shaft and take it out from the inside of the frame.

2. Remove 1 screw.

3. Release the hooks in 3 positions, as shown.

4. Remove 2 screws.

Open lever shaft (1001)

When removing the top case, release both hooks,

as shown at right.

Case

Hooks

Rev. B Disassembly and Assembly 4-17

TM-U220 Type A Service Manual

Confidential

Removing and Attaching the Top Case (Continued)

Removing and Attaching Rotation Spring R

Lift the case to remove as shown at right.

When removing the springs, push

the springs to the inside to release

each hook, as shown.

When attaching the springs, insert

each hook in the hole as shown.

Hook

4-18 Disassembly and Assembly Rev. B

Confidential

Attaching the Paper Hold Spring

Attaching the Fixed Blade Holder Assembly and Manual Cutter Holder

Attaching the Cover Open Assembly

Place the paper hold spring on the fixed blade holder, as shown.

Fixed blade holder assembly

Spring

Hook

Hole

Cover open assembly

When attaching the cover open assembly to the frame, be

sure that the wires are threaded through the hole.

Hole

Wires

Rev. B Disassembly and Assembly 4-19

TM-U220 Type A Service Manual

Confidential

Leading the Autocutter Unit Wires

Be sure there is slack in the cable, as shown.

Guard tube and lead wires Guard tube and lead wires

Autocutter unit cable

This is the point for attaching the top case hook. When

attaching the top case, be sure not to catch the

autocutter unit cable at this point.

4-20 Disassembly and Assembly Rev. B

Confidential

Attaching Platen Rotation Plate 2

Attaching the Platen Release Spring

Platen rotation frame 2

Platen rotation plate 2

Confirm that the edge of platen rotation

plate 2 does not touch the edge of platen

rotation frame 2. The point not to touch is

marked with red in the illustration.

Platen release plate

Insulator plate

assembly

When attaching the

platen release spring, you

need to put it on the plate

as shown.

Rev. B Disassembly and Assembly 4-21

TM-U220 Type A Service Manual

Confidential

Attaching Platen Assembly 3 (522)

1061

510 1055

1056

S09

1058

E01

509

1057

1053

S10

1125

S09

S10

S09

E01

1. Attach platen assembly 3 (522) to the platen

frame (1053) with 2 screws (S09) from upper of the

platen rotation frame 2 (1125).

2. Attach platen assembly 3 (522) to the platen

frame (1053) with 2 screws (S10) from left side of

the platen rotation frame 2 (1125).

3. Attach platen assembly 3 (522) to the platen

frame (1053) with 2 screws (S10) from right side of

the platen rotation frame 2 (1125).

4-22 Disassembly and Assembly Rev. B

Confidential

Attaching the Take-up Belt

Removing the Adjustment Roller Shaft Holder

Take-up transmission gear (1105) Take-up belt (523) Take-up transmission shaft (1112)

Middle take-up gear (1106)

Hook the take-up belt (523) to the take-up transmission gear (1105).

Install the back case (130) onto the mechanism assembly. After that, install the take-up

belt (523) and paper take-up gear assembly (131) onto the back case.

Put the back case sheet over the hole in the back case.

Take-up gear shaft (139)

Paper take-up gear assembly (131)

Back case (130)

Paper take-up gear assembly (1110)

Take-up belt (523)

Adjustment roller

shaft holder

When removing the shaft holder adjustment

roller, you need to rotate it as following.

Rev. B Disassembly and Assembly 4-23

TM-U220 Type A Service Manual

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Attaching the Carriage Belt

Attaching the Head FFC

Carriage belt

Carriage sub assembly

When attaching the FFC to the frame, be sure

that the FFC is threaded as shown.

4-24 Disassembly and Assembly Rev. B

Confidential

Attaching the Carriage Sub Assembly

Attaching the HP Board Assembly

Carriage sub assembly

Carriage guide plate Adjustment roller shaft holder

When assembling the carriage unit, be sure the carriage sub assembly is

attached to the carriage guide plate as shown.

When removing the adjustment roller shaft holder, rotate it as shown.

When attaching the HP board assembly, be sure the wires

are threaded through the hole and the board is attached to

the hooks as shown.

HP board assembly

Hook

Hole

RED

GRY

BLK

BLU

ORG

WHT WHT

When replacing the HP board assembly, be sure the

wires are soldered to the board as shown below.

BRW

Rev. B Disassembly and Assembly 4-25

TM-U220 Type A Service Manual

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Attaching the Roll Paper Guide Unit

Wires

Roll paper guide unit

4-26 Disassembly and Assembly Rev. B

Confidential

Wiring Placement for Each Cable

The illustration below indicates paths for the cable wiring.

Wires in the PF lead

wire set (1047)

Cover open

assembly wires (515)

Wires in the NE lead

wire set (1096)

HP board assembly

wires (518)

Paper feed motor sub

assembly wires (1046)

Rev. B Disassembly and Assembly 4-27

TM-U220 Type A Service Manual

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Attaching Each Cable to the Main Circuit Board

CN2: Connecting the cable for the autocutter unit (113)

CN4: Connecting the cable for the HP board assembly (518)

CN6: Connecting the cable for the NE lead wire set (1096)

CN7: Connecting the cable for the carriage motor sub assembly (1034)

CN8: Connecting the cable for the PF lead wire set (1047)

FFC

When connecting the cables to the main circuit board, be sure there is slack in

the lead wires, as shown.

Wires

CN10: Connecting the cable from CNC3.

4-28 Disassembly and Assembly Rev. B

Confidential

Lubrication Reference

Lubrication

Some lubrication points are indicated in the illustrations below. See the first few pages of this

chapter for additional information about lubrication, and also see the oil drop icons beside text

passages in the disassembly procedure tables for various printer components.

Rev. B Disassembly and Assembly 4-29

TM-U220 Type A Service Manual

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Lubricate the contact points between the carriage shaft and carriage sub assembly (2 points) with O-13.

Carriage shaft

Lubricate 1 point on the carriage sub assembly with G-36.

Lubricate one point on the carriage guide plate with G-36.

Carriage guide plate

Carriage sub assembly

Lubricate the point of contact between the rotation shaft and base frame with G-36.

Lubricate the switching points on the carriage guide plate sub assembly (ribbon switch lever) with G-36.

Carriage guide plate sub

assembly

Rotation shaft

Base frame

Carriage sub assembly

4-30 Disassembly and Assembly Rev. B

Confidential

Oil the joint of the paper feed reduction gear 1 (1093) and the NE detector lever (1043).

Paper feed reduction

gear 1 (1093)

Middle take-up gear

E-ring 3 (E01)

NE detector lever

Oil (G-36)

Oil the joint of the paper feed reduction gear 2 and the paper feed reduction shaft 2.

Oil (G-36)

Paper feed reduction gear 2

E-ring 3 (E01)

Paper feed reduction shaft 2

Oil the joint of the middle take-up gear and platen fixing shaft R.

Oil the joint of the take-up transmission gear and the take-up transmission shaft.

Take-up transmission gear

Oil (G-36)

Rev. B Adjustment and Setting 5-1

TM-U220 Type A Service Manual

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Chapter 5

Adjustment and Setting

Setting the Installation Position for the Roll Paper Near-End Detector

This printer allows you to change the installation position for the roll paper near-end detector

using the following steps.

1. Loosen the detector adjustment screw with a coin or similar tool. Turn the screw at least 3 or

4 times.

2. Push the detector lever in until it touches the back of the hole.

3. While pushing the detector lever, turn the tab until the lever clicks into place in the desired

hole.

4. Secure the detector adjustment screw.

5. Make sure the detector lever moves smoothly.

Detector lever

Detector

adjustment screw

5-2 Adjustment and Setting Rev. B

Confidential

Adjusting the Detection Point for the Roll Paper Near-End Detector

Below are 2 reasons the roll paper NE detector might require an adjustment:

❏To adjust the detection for the diameter of the roll paper core.

❏To adjust the amount of remaining paper before the sensor detects a near end.

1. Open the roll paper cover, and remove the paper roll.

2. Loosen the detector adjustment screw with a coin or similar tool.

3. Adjust the detector by sliding the lever in either of the directions shown below.

4. Tighten the detector adjustment screw.

5. Check to be sure that the detecting lever moves freely.

6. Replace the paper roll.

Detector

adjustment screw

Knob

Detector lever

Rev. B Adjustment and Setting 5-3

TM-U220 Type A Service Manual

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Setting the Paper Roll Width

The TM-U220 accommodates 76 mm {3"}, 69.5 mm {2.74"}, and 57.5 mm {2.26"} width paper rolls

with no adjustments. For the each roll width, use the roll paper spacer included with the printer.

Note:

❏The default paper width setting value saved in NV memory is 76 mm. So, if the customer does not use

76 mm width paper, return the printer only after setting the memory switch to the customer’s paper

width value using the appropriate method for each printer function below.

Use the TM Service Utility (See page 2-5.)

Use the Memory Switch Setup Mode (See page 5-12.)

❏For printer models with a paper near-end detector, be careful not to pinch the near-end detector lead

wires between the roll paper spacer and the roll paper holder, and be sure to push the lead wires inside,

so that the paper-end detector lead wires do not contact the motor gear.

1. Open the paper roll cover.

2. To set the each roll paper width, position the spacer as shown in the illustration below.

3. Position the roll paper spacer for the appropriate paper width. (See figure above.)

4. Tighten the spacer with 2 screws included with the spacer. (See figure above.)

Roll paper spacer

Positions for attaching the

screw (on the left side)

A: paper width = 76 m m

B: paper width = 69.5 mm

C: paper width = 57.5mm

5-4 Adjustment and Setting Rev. B

Confidential

Setting the Autocutter

The TM-U220 autocutter can be set to either “partial cut“ or “full cut“ using the steps below.

Note:

Do not change the cutting type from partial cut to full cut after the printer has been used. Otherwise, the

printer may not be reliable, because the wear-out level of the cutter blade differs.

1. Make sure the power supply is disconnected.

2. Open the roll paper cover, and remove it. (See page 4-16.)

3. Loosen the screw as indicated in following figure.

4. Lift the top of the cutter unit upward towards you, and remove from the dowel.

5. When you select partial cut (default), you have to adjust the dowel to the right, as

shown. When you select full cut, you have to adjust the dowel to left, as shown.

6. Tighten the 2 screws. Attach the roll paper cover again, and install the shaft that was

taken out in step 2.

Note:

❏Run the self-test to confirm the cutter action. (See page 2-2.)

Loosen the screw Remove the screw

Emergency cutter

dowel

Cutter unit

Partial cut Full cut

Rev. B Adjustment and Setting 5-5

TM-U220 Type A Service Manual

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Platen Gap Adjustment

Adjust the platen gap on the reassembled TM-U220 printer unit. Use the following steps to

adjust the platen gap for the printer. Adjust the printer’s platen gap when you have performed

any one of the following:

Note:

Once removed, do not reuse an adjustment roller shaft holder. Also, the platen gap adjustment uses the

standard of “0.45 mm thickness gauge falls; 0.55 mm thickness gauge does not fall”

1. Open the platen rotation frame, and tighten the adjustment roller shaft holder firmly.

2. Hold up the platen rotation frame and make sure the adjustment roller shaft holder is

tightened firmly on the both sides.

3. Move the print head unit to the left; insert the gauge from the left side; and adjust the gap

while rotating the adjustment shaft holder.

4. Move the print head unit to the right; insert the gauge from the right side; and adjust the gap

while rotating the adjustment shaft holder.

5. Move the print head unit to the left; insert the gauge from the left side; and check the gap. If

it does not meet the standard, adjust the gap while rotating the adjustment shaft holder.

6. Move the print head unit to the right; insert the gauge from the right side; and check the gap.

If it does not meet the standard, adjust the gap while rotating the adjustment shaft holder.

Disassembly Items Requiring Platen Gap Adjustment of the Printer

❏When you have replaced or removed the platen assembly.

❏When you loosened the screws fastening the carriage unit.

❏When you replaced or removed the print head.

Wider gap

Narrower gap

Adjustment roller shaft

holder

Gauge

5-6 Adjustment and Setting Rev. B

Confidential

Carriage Belt Tension Adjustment

1. Loosen the screw for the belt tension plate assembly. Hook the end of the tension gauge to

the hole in the belt tension plate assembly, adjust the tension properly, and tighten with the

screw.

2. Check the belt tension.

Note:

Make sure the belt tension plate is stable when loosening the screw that you tightened for the belt tension

plate while pulling the carriage belt with the tension gauge by 7.35N.

3. Tighten the belt tension plate assembly again with the screw.

Hook the end of the tension gauge and adjust the tension.

Tension gauge

Rev. B Adjustment and Setting 5-7

TM-U220 Type A Service Manual

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Adjust Various Settings

The items below can be adjusted for this printer:

❏DIP switches (communication condition, busy condition, print column, receive buffer

capacity, etc.)

❏Memory switches (serial communication conditions, roll paper width, cover open status

handling, etc.)

❏Roll paper width (76 mm / 69.5 mm / 59.5 mm): adjusted with the spacer and memory

switch

❏Roll paper near-end detector position

The current settings can be confirmed by the self-test. (See page 2-2.)

Note:

When you use a serial interface model with 1200 bps, 2400 bps, or 19200 bps, you have to adjust the

“serial interface selection“ DIP switch and the “serial communication condition“ memory switch.

When you adjust these items, we recommend that you confirm whether the new setting is enabled or

disabled. Confirming by performing a self-test. (See page 2-2.)

How to Confirm the Current Settings

Use a self-test to confirm the current settings. (See page 2-2.)

Adjusting the DIP Switches

The printer has 2 sets of DIP switches. The function of the DIP switches is different for each

interface model.

If you need to change settings, follow the steps below to make your changes:

CAUTION:

Turn off the power while removing the DIP switch cover to prevent an electric short,

which can damage the printer.

Use a Phillips (crosshead) screwdriver to remove the screw holding the DIP switch cover.

5-8 Adjustment and Setting Rev. B

Confidential

Note:

The switch functions are shown in the following sections.

US DIP switch functions are slightly different from the STD functions.

STD Tables

Note:

See the tables on the next page when the letters in the illustration above are “US.”

See “Notes for DIP Switch 2-1” on page 5-9 for further information on the settings for DIP SW 2-1.

When you use a serial interface model with 1200 bps, 2400 bps, or 19200 bps, adjust the “serial interface

selection“ DIP switch function and the “serial communication condition“ memory switch.

Serial Model

(DIP Switch 1) (DIP Switch 2)

SW Function On Off SW Function On Off

1 Data receive error Ignored Prints “?” 1 Print column selection 42/35 40/33

2 Receive buffer

capacity

40 bytes 4KB 2 Reserved

(autocutter enabled/ disabled)

Fixed to On —

3 Handshaking XON/XOFF DTR/DSR 3 Reserved — Fixed to Off

4 Word length 7 bits 8 bits 4 Serial interface selection Memory

switch

DIP switch

5 Parity check Yes No 5 Reserved — Fixed to Off

6 Parity selection Even Odd 6 Reserved — Fixed to Off

7 Transmission speed 4800 bps 9600 bps 7 Pin 6 reset signal Used Not used

8 Busy condition Receive

buffer full

Receive buffer

full or offline

8 Pin 25 reset signal Used Not used

Parallel / USB / Ethernet Model (Not for Serial Models)

(DIP Switch 1) (DIP Switch 2)

SW Function On Off SW Function On Off

1 Auto line feed Enabled Disabled 1 Print column selection 42/35 40/33

2 Receive buffer

capacity

40 bytes 4KB 2 Reserved

(Autocutter enabled/

disabled)

Fixed to On —

3~7 Reserved — Fixed to Off 3~7 Reserved — Fixed to Off

8 BUSY condition Receive

buffer full

Receive buffer

full or offline

8 Pin 31 reset signal Used Not used

Look at the numbers and letters in the area indicated in

the illustration. If the last letters are “US,” use the “US” tables

on the next page. If the last letters are “STD,” use the “STD”

tables below.

OFF ON

OFF

Rev. B Adjustment and Setting 5-9

TM-U220 Type A Service Manual

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US Tables

Note:

See the previous page for STD tables.

Notes for DIP Switch 2-1

DIP switch 2-1 defines the number of print columns per line as shown in the following table.

Units: cpl (characters per line)

Serial Model

(DIP Switch 1) (DIP Switch 2)

SW Function On Off SW Function On Off

1 Data receive error Ignored Prints “?” 1 Print column 42/35 40/33

2 Receive buffer

capacity

40 bytes 4KB 2 Reserved

(Autocutter enabled/

disabled)

Fixed to On —

3 Handshaking XON/XOFF DTR/DSR 3 Pin 6 reset signal Used Not used

4 Word length 7 bits 8 bits 4 Pin 25 reset signal Used Not used

5 Parity check Yes No 5 Reserved — Fixed to Off

6 Parity selection Even Odd 6 Reserved — Fixed to Off

7 Transmission speed 4800 bps 9600 bps 7 Reserved — Fixed to Off

8 Busy condition Receive

buffer full

Receive buffer

full or offline

8 Serial interface selection Memory

switch

DIP switch

Parallel / USB / Ethernet Model (Not for Serial Models)

(DIP Switch 1) (DIP Switch 2)

SW Function On Off SW Function On Off

1 Auto line feed Enabled Disabled 1 Print column selection 42/35 40/33

2 Receive buffer

capacity

40 bytes 4KB 2 Reserved

(Autocutter enabled/

disabled)

Fixed to On —

3 Reserved — Fixed to Off 3 Reserved — Fixed to Off

4~7 Reserved — Fixed to Off 4 Pin 31 reset signal Used Not used

8 Busy condition Receive

buffer full

Receive buffer

full or offline

5~8 Reserved — Fixed to Off

Paper width Character font

DIP switch 2-1 status

ON OFF

76 mm Font A (9 x 9) 35 33

Font B (7 x 9) 42 40

69.5 mm Font A (9 x 9) 32 30

Font B (7 x 9) 40 36

57.5 mm Font A (9 x 9) 27 25

Font B (7 x 9) 33 30

5-10 Adjustment and Setting Rev. B

Confidential

Memory Switches

This printer has memory switches, which are software switches that can be set to On or Off with

the memory switch setting utility. Available memory switch settings include MSW 2, MSW 8,

the customized value setting, and serial communication condition. Settings are shown in the

table below. (The default for all settings is Off.)

Note:

Memory switches can be changed using either of the following methods.

• Memory switch setting utility

• Memory switch setup mode (There are limitations on the settings available.)

For the memory switch settings that can be changed using the memory switch setup mode, see page 5-12.

Memory switch settings are stored in NV memory. Therefore, even if the printer is turned off, the settings

are maintained. Excessive use of this function may destroy the NV memory. As a guideline, do not use

this function more than 10 times a day.

Note:

MSW 2-3:

Setting memory switch MSW 2-3 affects Simplified Chinese models only.

Memory Switch 2

SW Function On Off

1 Reserved — Fixed to Off

2 Reserved — Fixed to Off

3 Selection of the Simplified Chinese

character code system

GB2312 GB18030

4 ~ 8 Reserved — Fixed to Off

Memory Switch 8

SW Function On Off

1 ~ 4 Reserved — Fixed to Off

5 Selection for cover open status Cover open Paper end

6 Reserved — Fixed to Off

7 Condition to release Busy in the receive buffer Remaining space ≥ 138 bytes Remaining space ≥ 256

bytes

8 Printer cover open during operation Can recover by correction of

the error and command

Automatically recovers

Rev. B Adjustment and Setting 5-11

TM-U220 Type A Service Manual

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Note:

MSW 8-5:

When Off is selected, the status bit for "roll paper end sensor" is transmitted from the printer every time

the roll paper cover is opened or closed. When On is selected, the status bit for "roll paper cover open /

close" is changed and is transmitted from the printer every time the roll paper cover is opened or closed.

MSW 8-8:

When Off is selected, the status bit for "automatically recoverable error" is changed and transmitted from

the printer every time the roll paper cover is opened. When On is selected, the status bit for "mechanical

error" is changed and transmitted from the printer every time the roll paper cover is opened.

MSW 8-5 and 8-8 can be set using the memory switch setup mode. See page 5-12.

Note:

These values can be set using the memory switch setup mode. (See page 5-12.)

Also, when adjusting the roll paper width, see page 5-3.

Note:

There are 2 methods for changing serial communication conditions: hardware DIP switches and software

memory switches, set using the service utility. DIP SW2 selects which settings are effective: DIP switches

or memory switches.

Also, these memory settings can be set using the memory switch setup mode described below.

Customized Value

Function Selectable values

Roll paper width 57.5 mm 69.5 mm

76 mm (default value) —

Serial Communications

Function Selectable values

baud rate 1200 bps 2400 bps

4800 bps 9600 bps

19200 bps —

Parity None Odd

Even —

Handshake DSR/DTR XON/XOFF

Data length 7 bit 8 bit

5-12 Adjustment and Setting Rev. B

Confidential

Memory Switch Setup Mode

The following settings are available in the memory switch setup mode:

❏Basic serial communication conditions (serial interface only)

❏Receive buffer full release condition (MSW 8-7)

❏Roll paper width (customized value)

❏Cover open status (MSW 8-5)

Note:

All new settings are lost if the power is turned off during the memory switch setup mode. Be sure to follow

the proper procedure, and turn the power off at the correct time.

Starting memory switch setup mode

Use the following steps to start memory switch setup mode.

1. Open the roll paper cover.

2. Turn the power on while pressing the paper FEED button.

3. Press the FEED button twice while the POWER, ERROR, and PAPER OUT LEDs are lighting.

4. Close the cover. The printer prints the current settings for the memory switches and

instructions.

5. Follow the printed instructions to set the switches.

Note:

During memory switch setup, the PAPER OUT LED may flash. The number of times the LED flashes

indicates the number of times to press the FEED button before closing the roll paper cover.

Ending memory switch setup mode

Once the setting is performed, the contents of the setting are stored. Then, the printer initializes.

When initialization is finished, the printer returns to normal operating mode.

Selecting individual settings

❏Basic serial interface settings

To select transmission conditions, first choose “Serial interface settings”; then select data length,

handshake, or parity.

Rev. B Adjustment and Setting 5-13

TM-U220 Type A Service Manual

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Press the FEED button the number of times required to select the desired “Serial interface

settings” transmission conditions.

bps: Indicates the number of transmitted bits per second (bps).

❏Data length, handshake, or parity

Press the FEED button the number of times required to select the desired data length, handshake,

or parity setting to be used for transmissions.

Press FEED button Setting selected

0 ~ 3 times: No change

4 times: 19200 bps

5 times: 9600 bps

6 times: 4800 bps

7 times: 2400 bps

8 times: 1200 bps

9 or more times: No change

Press FEED button Setting selected

Data Length Handshake Parity

0 times: No change

1 time: 8 bits DTR/DSR control No parity

2 times: Even

3 times: Odd

4 times: XON/XOFF control No parity

5 times: Even

6 times: Odd

7 times: 7 bits DTR/DSR control No parity

8 times: Even

9 times: Odd

10 times: XON/XOFF control No parity

11 times: Even

12 times: Odd

13 or more times: No change

Rev. B Preparation for Shipment 6-1

TM-U220 Type A Service Manual

Confidential

Chapter 6

Preparation for Shipment

Follow the instructions below before sending the printer back to the customer.

Inspection and Maintenance

Perform inspection and maintenance procedures described below properly to allow this unit to

operate for the years of trouble-free operation for which it is designed.

Maintenance Procedures

The inspection procedures described in the below table.

Cleaning

How to Clean the Cases

WARNING:

To avoid electric shock, be sure to disconnect the power cord from the electrical outlet.

Use a dry cloth to wipe away dirt. If the dirt proves difficult to remove, slightly moisten the

cloth with water or a mild detergent solution.

CAUTION:

Never clean the case with disinfectant, bleach, alcohol, benzene, thinner, chlorine, or

ketone; otherwise the dirt may become difficult to remove. Also, these chemicals may

cause the case to discolor, dissolve, or deform.

Periodic Inspection

Checkpoints Standards Remedies

Dust, paper particles, or dirt

on and in the printer

Do not allow dust, paper particles, or dirt

to build up on or in the printer.

Clean the printer thoroughly with a

vacuum cleaner.

Do not leave small pieces of paper in the

paper path.

Remove any pieces of paper from the

paper path.

Lubrication See the explanations in this chapter. Lubricate the points shown in the

diagrams.

Operation check

When you check each printer

component, you should find no

abnormalities.

Check the printer following “Repair

Guide,” in Chapter 2.

Shape of the springs No spring should be bent or deformed. Replace any deformed springs.

Ribbon cassette The ribbon cassette should be properly

installed in the printer.

See “Installing or Replacing the Ribbon

Cassette” on page 1-7.

6-2 Preparation for Shipment Rev. B

Confidential

Removing Dirt, Paper Chips, and Dust from Inside the Printer

Wipe off stains with a clean, dry cloth. If the stains do not wipe off, use a neutral detergent.

CAUTION:

Check the amount of lubrication on each cleaned area and lubricate as needed. See

“Lubricants” at the beginning of Chapter 4.

Also see the explanations for the lubrication points contained in the diagrams in

Chapter 4.

Rev. B Parts List Appendix-1

TM-U220 Type A Service Manual

Confidential

Appendix

Parts List

Reference Number List

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

102 Power switch cover Cover,power switch 1 Yes

103 M-T88 shield tube Shield tube M-T88 2 Yes

104 Manual cutter screw Screw,manual cutter 1 Yes

105 Switch 1 screw Screw,switch,1 1 Yes

106 Caution C seal Seal,caution,C 1 Yes

107 Logo plate Logo plate 2 Yes

108 Top case Case,top 1 Yes

109 Ribbon cover Cover,ribbon 1 Yes

110 Switch panel Switch panel 1 Yes

111 Operation label A Label,operation,A 1 Yes

112 Rubber foot Rubber foot 2 Yes

113 Autocutter unit Auto cutter unit 1 Yes

114 Cutter frame assembly Frame, cutter assembly 1 Yes

115 Cutter cover assembly Cover, cutter assembly 1 No

117 Cutter motor sub assembly Motor, cutter sub assembly 1 Yes

118 Guard tube C Guard tube,C 1 Yes

119 Cover Roll paper assembly Cover,roll paper assembly,AA 1 Yes

120 Mechanism assembly Mechanism assembly,A 1 Yes

121 Micro switch Micro switch 1 Yes

122 I/F circuit board unit I/F circuit board unit 1 Yes

123 Sub circuit board unit Sub circuit board unit 1 Yes

124 AC adapter AC adapter 1 Yes

125 AC cable, USA AC cable, USA 1 Yes

126 Front sheet sheet, front 1 Yes

128 Lever open shaft A Shaft,lever open,A 1 Yes

130 Back case Case,Back,AA 1 Yes

131 Paper take-up gear assembly Paper Take-up gear assembly 1 Yes

134 Paper take-up shaft assembly Paper take-up shaft assembly 1 Yes

135 Take-up flange Take-up flange 1 Yes

136 Take-up flap Take-up flap 1 Yes

Appendix-2 Parts List Rev. B

Confidential

137 Platen rotation plate 2 Plate,platen rotation,2 1 Yes

138 Cover open lever A Lever ,cover open,A 1 Yes

139 Take-up gear shaft Shaft,take-up gear 1 Yes

140 Operation label D Label,operation,D 1 Yes

141 Rubber foot B Rubber foot,B 2 Yes

201 Main circuit board unit Main circuit board unit 1 Yes

502 Switch 1 screw Screw,switch,1 1 Yes

503 Print head unit Print head unit 1 Yes

504 Platen release lever Lever,platen release 1 Yes

505 Belt drive pulley Pulley,belt drive 2 Yes

506 Adjustment roller shaft holder Shaft holder,adjustment roller 1 Yes

507 Carriage belt Carriage belt 1 Yes

508 Roll paper holder plate Holder roll paper plate 1 Yes

509 Paper feed middle gear Gear,paper feed middle 1 Yes

510 Paper feed middle gear B Gear,paper feed middle, B 1 Yes

512 Ribbon middle gear Gear,ribbon middle 1 Yes

513 Fixed blade Fixed blade 1 Yes

514 Paper end assembly Paper end assembly 1 Yes

515 Cover open assembly Cover open assembly 1 Yes

516 Ribbon take-up gear sub assembly Gear, ribbon take-up sub assembly 1 Yes

517 Ribbon drive plate sub assembly Plate,ribbon drive sub assembly 1 Yes

518 HP board assembly HP board assembly 1 Yes

519 Ribbon frame assembly Frame,ribbon assembly 1 Yes

520 Operation label C Label,operation,C 1 Yes

521 Head FFC FFC,head 1 Yes

522 Platen assembly 3 Platen assembly,3 1 Yes

523 Take-up belt Belt,take-up 1 Yes

1001 Open lever shaft Shaft,lever open 1 No

1003 Open lever Lever,open 1 No

1004 Bottom plate Plate,bottom 1 No

1005 Frame rotation unit Frame rotation unit 1 No

1006 Rotation spring R Spring,rotation,R 1 No

1009 Rotation shaft Shaft,rotation 1 No

1010 Roll paper holder Holder,roll paper 1 No

1011 Base frame Frame,base 1 No

1012 Base frame Frame,base 1 No

1013 Fixed blade holder assembly Holder,fixed blade assembly 1 No

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

Rev. B Parts List Appendix-3

TM-U220 Type A Service Manual

Confidential

1014 Paper hold spring Spring,paper hold 1 No

1015 Paper hold roller Roller,paper hold 2 No

1016 Fixed blade spring Spring,fixed blade 1 No

1017 Fixed blade holder Holder,fixed blade 1 No

1018 Cover open plate Plate,cover open 1 No

1022 Ribbon frame spring Spring,ribbon frame 1 No

1023 Ribbon frame shaft L Shaft,ribbon frame,L 1 No

1024 Ribbon frame Frame,ribbon 1 No

1025 Carriage sub assembly Carriage sub assembly 1 No

1026 Carriage guide plate sub assembly Plate,carriage guide sub assembly 1 No

1027 Carriage shaft Shaft,carriage 1 No

1028 Carriage motor plate sub assembly Plate,carriage motor sub assembly 1 No

1029 Belt tension pulley Pulley,belt tension 1 No

1030 Carriage guide plate Plate,carriage guide 1 No

1032 Belt pulley shaft Shaft,belt pulley 1 No

1033 Belt tension plate Plate belt tension 1 No

1034 Carriage motor sub assembly Motor,carriage sub assembly 1 No

1035 Ribbon take-up gear shaft Shaft,ribbon take-up gear 1 No

1036 Middle ribbon gear shaft Shaft,ribbon middle gear 1 No

1037 Roll paper guide Guide,roll paper 1 No

1038 Roll paper guide unit Guide,roll paper unit 1 No

1039 Micro switch Micro switch 1 No

1040 Detector adjustment screw Detector adjustment screw 1 No

1041 NE detector assembly N.E.detector assembly 1 No

1042 NE detector holder Holder,N.E.detector 1 No

1043 NE detector lever Lever,N.E.detector 1 No

1044 Roll paper holder assembly Holder roll paper assembly 1 No

1045 Paper guide roller Roller,paper guide 1 No

1046 Paper feed motor sub assembly Motor paper feed sub assembly 1 No

1047 PF lead wire set Lead wire set,PF 1 No

1048 Paper feed reduction shaft 1 Shaft,paper feed reduction,1 1 No

1049 Platen fixing shaft R Shaft,platen fix,R 1 No

1050 Rotation frame spacer Spacer,frame rotation 1 No

1052 Cover open lever Lever,cover open 1 No

1053 Platen frame Frame,platen 1 No

1054 Platen shaft Shaft,platen 1 No

1055 Platen release plate Plate,platen release 1 No

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

Appendix-4 Parts List Rev. B

Confidential

1056 Platen release spring Spring,platen release 1 No

1057 Gear plate D sub assembly Plate,gear,D sub assembly 1 No

1058 Paper feed reduction gear 2 Gear,paper feed reduction,2 1 No

1059 Paper feed reduction shaft 2 Shaft,paper feed reduction,2 1 No

1060 Middle paper feed shaft Shaft,paper feed middle 1 No

1061 Bottom holding plate bm Holding plate,bm,bottom 1 No

1063 Paper feed gear Gear, paper feed 1 No

1069 S Push N, 3, F / Zn S Push N,3,F / Zn 1 No

1071 Cutter cover sub assembly Cover, cutter sub assembly 1 No

1072 Drive gear sub assembly Gear, drive sub assembly 1 No

1073 Insulator plate assembly Plate,insulator assembly 1 No

1074 Platen Platen 1 No

1075 Paper feed roller Paper feed roller 1 No

1076 Platen assembly 1 Platen assembly,1 1 No

1077 Belt tension plate assembly Plate belt tension assembly 1 No

1078 Carriage Carriage 1 No

1079 Base frame sub unit Frame,base sub unit 1 No

1080 Micro switch Micro switch 1 No

1081 Ferrite core Ferrite core 1 No

1084 Roll paper cover BA Cover,roll paper,BA 1 No

1085 Bottom frame assembly Frame,bottom assembly 1 No

1086 Belt tension plate sub assembly Plate belt tension sub assembly 1 No

1088 Ribbon take-up spring Spring,ribbon take-up 1 No

1089 FFC cover tape Tape,FFC cover 1 No

1090 AC lead wire set Lead wire set,AC 1 No

1091 Micro switch Micro switch 1 No

1092 Hook spring C Spring,hook,C 1 No

1093 Paper feed reduction gear 1 Gear,paper feed reduction,1 1 No

1094 Gear drive Gear drive 1 No

1095 IC cover IC Cover 1 No

1096 NE lead wire set Lead wire set, NE 1 No

1097 Ribbon release spring Spring,ribbon release 1 No

1099 Ribbon cassette Ribbon cassette 1 No

1100 CBS-TITE screw, 3X12, F/ZN C.B.S-TITE SCREW,3X12,F/ZN 2 No

1101 CBB-TITE screw, 2X8, F/ZN C.B.B-TITE SCREW,2X8,F/ZN 1 No

1102 Paper hold roller shaft Shaft, paper hold roller 1 No

1104 Cutter rotation spring Spring,rotation cutter 1 No

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

Rev. B Parts List Appendix-5

TM-U220 Type A Service Manual

Confidential

1105 Take-up transmission gear Gear,take-up transmission 1 No

1106 Middle take-up gear Gear,take-up middle 1 No

1107 Cutter support frame sub assembly Frame cutter support sub assembly 1 No

1108 Cutter support frame Frame,cutter support 1 No

1109 Cutter support shaft Shaft,cutter support 1 No

1110 Paper take-up gear assembly Paper take-up gear assembly 1 No

1111 Take-up flapper spring Take-up flapper spring 1 No

1112 Take-up transmission shaft Shaft,take-up transmission 1 No

1114 Rotation cutter frame assembly Frame rotation cutter assembly 1 No

1115 Cutter rotation frame sub assembly Frame rotation cutter sub assembly 1 No

1116 Cutter rotation frame Frame,rotation cutter 1 No

1117 Cutter paper guide Paper guide,cutter 1 No

1118 Rotation frame spacer Spacer,frame rotation 1 No

1119 Roll paper guide spring Spring,roll paper guide 1 No

1120 Roll paper guide plate Plate,roll paper guide 1 No

1121 Manufacturer’s plate Manufacture’s plate 1 No

1122 Roll paper cover Cover,roll paper 1 No

1123 Open lever Lever,open 1 No

1124 Platen rotation frame 2 unit Frame platen rotation,2 unit 1 No

1125 Platen rotation frame 2 Frame,platen rotation,2 1 No

1126 Nut Nut 1 Yes

1127 E-ring 2.3 E-ring 2.3 1 No

1128 CBS-TITE, 3X5, F/ZN C.B.S- TITE,3X5,F/ZN 2 No

1129 Cutter rotation plate Plate,rotation cutter 1 No

E01 E-ring 3 E-ring,3 9 Yes

E02 E-ring 2.3 E-ring,2.3 5 Yes

E03 E-ring 4 E-ring,4 2 Yes

E04 E-ring 3 E-ring,3 2 Yes

S01 CPS(O) screw, 3X6 C.P.S.(O) Screw,3X6 8 Yes

S02 CPS-TITE, 3X5,F/ZN C.P.SITITE,3X5,F/ZN 8 Yes

S03 CBS screw, 3X6 C.B.S. Screw,3X6 12 Yes

S04 CB screw, 2X2.5, F/ZN C.B. Screw,2X2.5,F/ZN 1 Yes

S05 CBP-TITE screw, 3X8, F/ZN C.B.P-TITE Screw,3X8,F/ZN 5 Yes

S06 Screw (P tight) SCREW(P tight) 1 Yes

S07 CBP-TITE, 3X10, F/ZN C.B.P-TITE,3X10,F/ZN 2 Yes

S08 CBP-TITE screw, 3X6, F/ZN C.B.P-TITE Screw,3X6,F/ZN 3 Yes

S09 CBS-TITE, 3X4, F/ZN C.B.S-TITE,3X4,F/ZN 5 Yes

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

Appendix-6 Parts List Rev. B

Confidential

S10 CBS screw, 3X6, F/ZN C.B.S. Screw,3X6,F/ZN 5 Yes

S11 CBS- TITE, 3X5, F/ZN C.B.S- TITE,3X5,F/ZN 9 Yes

S12 CPSPS screw C.P.S.P.S. Screw 1 Yes

S13 CBS-TITE, 3X4, F/ZN C.B.S-TITE,3X4,F/ZN 2Yes

S14 CPS(O) screw C.P.S.(O) Screw 1 Yes

S15 CBP-TITE screw, 3X6, F/ZN C.B.P-TITE Screw,3X6,F/ZN 1 Yes

W01 Plain washer Plane washer 1 Yes

W02 Plain washer Plane washer 1 Yes

Table A-1 Parts List by Reference Number

Ref. # Service Manual Name Parts Price List Name Qty. Supplied as a part?

SEIKO EPSON CORPORATION Printed in Japan

EPSON

Table of Contents

Epson TM-U220PA User Manual

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