Epson TM-U220 User Manual
Confidential
Service manual
TM-U220 Series
(Type A)
Issued date , ,
Issued by
EPSON
English
404619501
Rev. B
Confidential
TM-U220 Type A Service Manual
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
Rev. B i
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
ii Rev. B
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
TM-U220 Type A Service Manual
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
Rev. B iii
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.
iv Rev. B
Confidential
TM-U220 Type A Service Manual
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.
Rev. B v
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.
vi Rev. B
Confidential
TM-U220 Type A Service Manual
About this Manual
Aim of the Manual
This manual was created to provide the information on printer maintenance and repair required
by technicians who handle this work.
Manual Content
The manual is made up of the following sections
Chapter 1 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
Chapter 5 Adjustments and Settings Describes adjusting and settings procedures.
Chapter 6 Preparation for shipment Describes preparation for transport. Also
Appendix Parts List Provides a parts list. Also describes screw types.
Describes disassembly and assembly procedures.
Also, shows exploded diagrams and lubrication
point diagrams for this product.
provides information on maintenance,
inspection, and cleaning.
Rev. B vii
Confidential
TM-U220 Type A Service Manual
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.
Type A
Type B
TM-U220 external views
Type D
TM-U220 Model Comparison
Type A Type B Type D
Two-color printing Yes Yes Yes
Autocutter Yes Yes No
Take-up device Yes No No
Paper width
Interface (supplied with printer)* Serial or parallel Serial or parallel Serial or parallel
Characters supported
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.
76 / 69.5 / 57.5 mm
{3" / 2.74" / 2.26"}
Alphanumeric (ANK) or
multilingual**
76 / 69.5 / 57.5 mm
{3" / 2.74" / 2.26"}
Alphanumeric (ANK) or
multilingual**
76 / 69.5 / 57.5 mm
{3" / 2.74" / 2.26"}
Alphanumeric (ANK) or
multilingual**
Notes on Connecting the Power Supply Unit
Be sure to use the correct power supply unit, as listed in the table below.
TM-U220 alphanumeric model TM-U220 multilingual model
1. AC adapter C (packed with the alphanumeric model)
2. PS-180 (option)
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.
Rev. B Product Overview 1-1
PS-180 (packed with the multilingual model)
Confidential
Configurations
This TM-U220 is configured by combining features from the list below.
Table 1-1 Configurations
Features Selection Description
UB-S01 (RS-232)
Interface types
Paper width selections 76, 69.5, or 57.5 mm {3", 2.74", or 2.26"}
Power supply unit types
Installation positions
UB-P02II (IEEE 1284 (bidirectional parallel))
EPSON UB universal interface board
options
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
Horizontally (default)
Vertically by use of the optional WH-10
wall-hanging bracket
Use an EPSON-approved interface board
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.”
Do not use the AC Adapter C with the
multilingual model.
Selections in the table above may be added to or changed in the future.
Note:
dpi: dots per 25.4 mm (dots per inch)
Part Names
The figure below shows part names for the TM-U220.
Roll paper cover
Control panel
Ribbon cassette cover
Power switch
1-2 Product Overview Rev. B
Confidential
TM-U220 Type A Service Manual
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.
Rev. B Product Overview 1-3
Confidential
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
1-4 Product Overview Rev. B
Confidential
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.
TM-U220 Type A Service Manual
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.
Rev. B Product Overview 1-5
Confidential
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.
Take-up flange
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.
1-6 Product Overview Rev. B
Confidential
TM-U220 Type A Service Manual
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.
Knob
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.
Rev. B Product Overview 1-7
Confidential
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,
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)
Autocutter
(Type A, B only)
Auto take-up unit Type A, C Type A Type A
Print area 76 mm paper:
Space from autocut to
print start:
Space from manual cut to
print start:
Receive buffer Alphanumeric: 1KB/40 bytes
NV bit image memory Alphanumeric: none
NV user memory Alphanumeric: none
Power supply PA-6509 or PB-6509 (North America) PB-6509 (North America) AC Adapter C — Low-cost universal
Dimensions (W x D x H) Type A: 170 x 288 x 183 mm
Installation Horizontally with a 15° slant, maximum.
Buzzer None None Printer also can be used with annunciator
extended 126 x 7
Original + 1 copy (at all temperatures)
Full cut or partial cut set by command Partial cut default;
Width: 63.34 mm (200 dots x
Left margin: 6 mm
Right margin: 6.5 mm (approx.)
36 mm
Type A, B: 26 mm; Type C, D: 28 mm
Multilingual: 512 bytes/40 bytes
Multilingual: none
Multilingual: none
Type B: 170 x 253 x 148 mm
Type C: 158 x 295 x 145 mm
Type D: 158 x 235 x 125 mm
Type B, D: Vertically on wall using WH-10
bracket.
400 positions)
{6.7 x 11.3 x 7.2"}
{6.7 x 10 x 5.8"}
{6.2 x 11.6 x 5.7"}
{6.2 x 9.3 x 4.9"}
Alphanumeric 95, international 32,
extended 128 x 8
A and B: original + 1 copy;
D: original + 2 copies
full cut set by command
76 mm paper:
Width: 63.34 mm (200 dots x
Left margin: 5.9 mm
Right margin: 6.76 mm
27 mm
20.2 mm
Alphanumeric: 1KB/40 bytes
Multilingual: 512 bytes/40 bytes
Alphanumeric: none
Multilingual: none
Alphanumeric: none
Multilingual: none
Type A: 160 x 295 x 160 mm
Type B: 160 x 248 x 150 mm
Type D: 160 x 248 x 133 mm
Horizontally with a 15° slant, maximum. Horizontally with a 15° slant, maximum.
400 positions)
{6.3 x 11.6 x 6.3"}
{6.3 x 9.8 x 5.9"}
{6.3 x 9.8 x 5.2"}
Alphanumeric 95, international 48,
extended 128 x 12
All models: original + 1 copy
Partial/full cut set by command
76 mm paper:
Width: 63.34 mm (200 dots x
Left margin: 6.8 mm
Right margin: 5.8 mm
69.5 mm paper:
Width: 57 mm (180 dots x
Left margin: 6.7 mm
Right margin: 5.8 mm
57.5 mm paper:
Width: 47.5 mm (150 dots x
Left margin: 4.2 mm
Right margin: 5.8 mm
27 mm
Type D: 22.1 mm; Type A, B: 34.9 mm
Alphanumeric: 4KB/40 bytes
Multilingual: 4KB/40 bytes
Alphanumeric: 128KB
Multilingual: 128KB
Alphanumeric: 8KB
Multilingual: 8KB
power supply for impact dot matrix
printer supplied in box.
Type A: 160 x 286 x 157.5 mm
Type B: 160 x 248 x 138.5 mm
Type D: 160 x 248 x 138.5 mm
Optional IR tray also can be used.
Type B, D: Vertically on wall using WH-10
bracket.
interface.
400 positions)
360 positions)
300 positions)
{6.3 x 11.3 x 6.2"}
{6.3 x 9.8 x 5.5"}
{6.3 x 9.8 x 5.5"}
1-8 Product Overview Rev. B
Confidential
TM-U220 Type A Service Manual
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
Confirm the right status
If no problem is found, the product is considered to be
Troubleshooting
Assembly/disassembly
Adjustment/setting
normal, and can be sent to the user’s environment.
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.
Rev. B Repair Guide 2-1
Confidential
Printer Status Checks
Operation Normal printer operation When a problem occurs
Power LED light comes on.
Power on.
Run the self-test.
*Refer to page 2-2
for operation.
Run the “all
function test” with
the service utility.
*Refer to page 2-7
for operation.
Perform other
checks of
operation.
Mechanical initializing operation occurs.
ERROR LED light is off.
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.
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.)
Normal opening/closing of roll paper
cover.
Normal opening/closing of ribbon cover.
The case is dirty.
Once you have confirmed the printer status using the table above, you can perform the
necessary functions below.
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.)
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.)
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.)
Parts do not move smoothly. (See page 3-20.)
The case is dirty. (See page 3-20.)
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.
2-2 Repair Guide Rev. B
Confidential
Printer Status Print
Normal printout result Explanation
TM-U220 Type A Service Manual
➀
➁
➂
➃
➀ Version information
Main program version
Boot program version
➁ Interface classification
Interface information
➂ Receive buffer capacity *1)
➃ Busy release conditions for receive buffer full *2)
➄ Busy condition *3)
➅ Resident character *4)
7 Paper roll width *5)
➇ Dot spacing between characters *6)
9 Characters per line *7)
Autocutter unit installed/not installed *8)
Note:
*1) Differs depending on DIP SW1-2.
➄
➅
7
➇
*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.)
*3) Differs depending on DIP SW1-8.
*4) Performs a multilingual CG judgment when printing resident
characters.
*5) Differs depending on the paper roll width set with the
memory switch (customized value).
*6) Differs depending on DIP SW2-1.
*7) Differs depending on the paper roll width and dots
between characters.
*8) Differs depending on DIP SW2-2.
9
Rev. B Repair Guide 2-3
Confidential
Roll Pattern
Normal print result Explanation
Black (6 lines)
Red (6 lines)
Red (6 lines)
Paper feeds 2 lines.
Paper is fed to a position where the user can see
the ending message at left
.
2-4 Repair Guide Rev. B
Confidential
TM-U220 Type A Service Manual
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. 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.
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.
Rev. B Repair Guide 2-5
Confidential
❏
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.
1. Select a printer sequence
to execute.
2. Click Next to proceed.
❏
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.
2-6 Repair Guide Rev. B
Confidential
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.
1. Select the test elements.
2. Click to start the All Function Test.
TM-U220 Type A Service Manual
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.
Rev. B Repair Guide 2-7
Confidential
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.
1. Indicate the sensor to test.
2. Follow the message to operate
the printer.
3. Click If you want to skip the test.
2-8 Repair Guide Rev. B
Confidential
TM-U220 Type A Service Manual
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
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.
➆
➇
*2) When using the 2-color ribbon, prints in 2 colors.
*3) When autocutter setting is partial cut, full cut is
not performed.
Rev. B Repair Guide 2-9
Confidential
Status Print
Normal print result Explanation
➀
➁
➂
➃
➄
➅
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, “
➆
➇
printed before the memory switch number.
*4) When autocutter setting is full cut, partial cut is
not performed.
*
” is
2-10 Repair Guide Rev. B
Confidential
Normal print result Explanation
TM-U220 Type A Service Manual
➀
➁
➂
➃
➀ Prints program version.
Main program version is printed.
Boot program version is printed.
Original program version is printed.
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)
Manufacturer name
Model name
Product serial no.
➇ Prints defined data for the space page.
➈ Prints definition of command default values.
Note:
*1, 2) Data defined by a user must be backed up
and restored.
➄
➅
➆
➇
➈
Rev. B Repair Guide 2-11
Confidential
Report Print
Normal print result Explanation
➀
➁
➂
➃
➄
➅
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.)
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.
2-12 Repair Guide Rev. B
Confidential
TM-U220 Type A Service Manual
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.
Roll paper cover
Tab
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.
Rev. B Troubleshooting 3-1
Confidential
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.
Autocutter unit
4. Lift up the roll paper cover.
Hole
Knob
Lever
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.
❏
3-2 Troubleshooting Rev. B
Loading...