Epson TM-L90 series Service Manual

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Page 1

Confidential

Service manual

Issued date , ,

TM-L90 series

Issued by

EPSON

English

401392002

Rev.C

Page 2

Confidential

Revision Table

Rev. Page Description

Rev. A all pages Newly authorized Rev. B viii Add the information of the related documentation

Reason for change: The “TM Service & Support Tool“ is release.

1-1 Add the “powe r su p ply unit type in th e ”s p ecifications and configurations.

Exclusive external power supply unit: PS-175 (North America only) or PS-180 (power supply packaged specification only). External power supply unit: Model PS-180 and PS-170.

Reason for change: Missing information.

2-2 Added the sentence below to the explaination “Paper is jammed inside the

printer”.

{Please confirm to be attached the holder guide sheet C(#182) and D(#183) when the paper is jammed in spite of doing the above steps. (Refer to Appendix D-12.)}

Reason for change: The parts “Holder guide sheet C(#182) and Holder guide sheet D(#183)“ were provided in order to prevent the paper from jamming.

TM-L90 Service Manual

Add the “before servi cing“ and “diagnosing failures“.

Reason for change: To make the explanation easier to understand.

2-3 Change the “Troubleshoting Fliowcharts“ to the “simptoms and solutions”.

Reason for change: To make the explanation easier to understand.

2-5 Add the explanation to the ”paper layout error” that is the automatically

2-6 Add the below explanation to ”Autocutter error” that is the automatically

2-8 Add the “test po ints on the print e r m ec h anism“.

3-17 Add the “insla ti ng tape“ to fix fer ri t e c ore. 3-37 Add two spacers on the illustration.

recoverable errors of the ”Troubleshooting using the ERROR LED”

Reason for change: Missing information.

recoverable errors of the ”Troubleshooting using the ERROR LED” ❏ Check the cutter motor sub-assembly. (see page 2-8.) Replace the motor and

the main circuit board unit if the cutter motor sub-assembly has been shorted. (See page 3-39, 3-13.)

❏ Replace the main cir cui t boar d un it to see if the pr i nter i s r epa ired. (Se e pa ge 3-

13.) If the printer is repaired, analyze the defective part by referrin g to “Main Circuit Board Unit Test Points“ on page appendix F-6.

Reason for change: Missing information.

Reason for change: Because of changing chapter 2.

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Rev. Page Description

4-1 Add the paper types for origin al and specified paper.

Reason for change:

To make the explanation easier to understand. 6-10 6-13

Rev. B 6-15 Add the felow explanation for “select paper with s”.

7-3 Add the exp lanation for “Precautions on paper handling“.

Add the note about the setting for serial communication conditions.

Changed the explanation for the ”Capacity of the receive buffer” that is the

function for the”memory swit ch1-2”

old: Capacity of the receive buffer “la rge “/O FF.

new: Capac ity of the receive buf f er “4KB“/OFF .

old: Capacity of the rece iv e bu f fe r “s ma ll“ / O N.

new: Capac ity of th e re c eive buffer “45B“/ON.

Reason for change:

To make the explanation easier to understand.

43 steps in increment of 1 mm, except for the size from 71 mm to 79 mm

Reason for change:

To make the explanation easier to understand.

When the printer is not used for one week or more, it is recomended not to leave

the thermal paper between the platen and the print head.

Reason for change:

Missing information. Appendix A Add the explanation for the paper types for original and specified paper . (To

Appendix D The parts below were newly provided.

ensure print quality, be sure to use the specified pap er. )

old: Label paper

new: Lavel paper (with black mark)

Lavel paper (without black mark)

Reason for change:

Missing information.

spacer

Sheet, holder guide, C

Sheet, holder guide, D

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Rev. Page Description

Rev. C <Discontinued parts>

Sheet, holder guide, (Ref# 176) Sheet, holder guide, C (Ref# 182) Sheet, holder guide, D (Ref# 183

TM-L90 Service Manual

3-26,46,52 The new parts “Spacer Thermal Head“ is added on Thermal Print Head.So the following illustration

3-25,52 Added the explanation about the method of install ing the head (new type)

Appendix D-10

is changed.

Before change After change

as “Important Note About Installing Thermal Print Head“.

The part “Spacer Thermal Head“ on Pa rs L is t and Exploded Diag ram is deleted.

Spacer Thermal Head

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TM-L90 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 con fidential. I f the user is a b usine ss entit y or organiz ation, you must limit disclosur e 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 informa ti on. You must th en ret urn or de st roy th e informa ti o n, as dir ected by Seiko Epson.

❏ If a court, arbit rat or, gove rnmen t ag ency , or th e like orde rs you t o di sclose any con fide ntia l informa tion, 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 o r damage arisi ng from or relating t o 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 Agreem en t a re in addi tion to a ny ot her lega l obl iga ti ons. 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 subj ect to change without notice. Please contact us for the lates t information. ❏ While every precaution has been taken in the prepara ti on of this d ocumen t, Seik o Epson Corpora t ion a ssumes 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, losse s, cos ts, or expen ses inc urred by t he purc hase r or t hird parties a s a r esul t of: a cciden t, mi suse, or abuse of this product or unau thoriz ed modifi cati ons, r epairs, or alterations to this product, or (ex c luding t he 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 Corporati on.

EPSON

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

Rev.B i

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Confidential

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

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

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

Modular Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi

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

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

Contents of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

Chapter 1 Product Overview

Specifications and Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Chapter 2 Troubleshooting Guide

Preparations for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

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

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

Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

How to Use the Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Print Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Troubleshooting Using the ERROR LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Test Points on the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

Chapter 3 Disassembly and Assembly

Notes for Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -1

How to Read this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Structure of this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

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

Representation of Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Replacing the Thermal Print Head Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Disassembly and Assembly of the TM-L90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

First Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -9

Disassembly and Assembly of the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

First Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 -15

Second Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35

Third Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-47

Chapter 4 Adjustment and Settings

Threshold Value Setting for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Chapter 5 Maintenance, Inspection, Lubrication, and Cleaning

Periodic Maintenance or Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Recommended Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Cleaning the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Cleaning the Thermal Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

Chapter 6 Installation

Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Installation Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Vertical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Horizontal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

ii Rev.B

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Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Setting the Installation Position for the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Adjusting the Detecting Point of the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Setting the Paper Roll Cutting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Setting the Paper Roll Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Attaching the Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Setting the DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Location of the DIP switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

DIP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Connecting Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

Setting the NV Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Memory Switch Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Paper Layout Automatic Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Customized Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Serial Communication Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Chapter 7 Handling

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Precautions on Handling the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Precautions on Paper Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

LEDs and Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Powering the unit ON or OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Loading the paper roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Removing the roll paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

TM-L90 Service Manual

Appendix A General Specifications

Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Autocutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Paper Roll Supply Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Dimensions and Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Drawer Kick-out Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Buttons and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Panel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

DIP Switches and NV Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Appendix B Overview of the Mechanisms

Cover Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Print/Paper Feed Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Thermal Print Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Paper Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

Changing the paper width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6

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Autocutter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-6

Full cut and partial cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

Manual cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

Appendix C Tools Appendix D Parts List

Alphanumeric List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-3

Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6

Overall Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Case Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-1

Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Appendix E Lubrication Points Diagram Appendix F Overview of Electric Circuits

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2

Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

Switch Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6

Sub Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-6

Interface Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6

Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

Test points on the main circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

Test Point Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8

Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9

Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9

Switch Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-11

Sub Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .F-11

Circuit Board Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1

Main Circuit Board (1 of 3) (Drawing Number 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1

Main Circuit Board (2 of 3) (Drawing Number 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2

Main Circuit Board (3 of 3) (Drawing Number 20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

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TM-L90 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 t o yourself, dama ge to your equipment, or loss of data.

Note:

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

Safety Precautions on Maintenance/Repair/Inspection

WARNING:

❏

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

❏

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

❏

To prevent the possibility of electri cal shock, do not per form mainten ance, rep air, 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 unpl ug the equipment.

❏

Only disassemble this product as de scribed 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.

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CAUTION:

❏

When mounting or replacing the paper roll, be car eful not to touch the manual

cutter, because it is sharp and can injure you.

❏

This product contains other metal parts with sharp edges in addition to the cutter.

Touching these parts also may cause injury.

❏

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

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

❏

Note that the thermal print head and paper feed motor become very hot during

normal operation, creating the danger of burn injury. Be sure to wait for about 10

minutes after turning pri nter power off bef ore b eginn ing th e maint enanc e, rep ai r, or

inspection.

Modular Connector

Use the modular connector specifically designed for the cash drawer for this product. Do not connect this connector to an ordinary telephone line.

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TM-L90 Service Manual

About this Manual

Aim of the Manual

This manual was cre ate d to provi de th e inf ormat ion on print er m aintena nce an d rep air r equire d by technicians who handle this work.

Contents of the Manual

The configuration of the manual is as follows.

Chapter 1 Product Overview

Chapter 2 Troubleshooting Guide

Chapter 3 Disassembly and Assembly Chapter 4 Adjustment and Settings Chapter 5 Maintenance, Inspection,

Cleaning, and Lubrication

Chapter 6 Installation Chapter 7 Handling Appendix A Features and General

Specifications

Appendix B Overview of the

Mechanisms

Appendix C Tools

Describes features and configurations of the unit.

Explains troubleshooting (to pinpoint the problem area by the symptom).

Describes disassembly and assembly of the unit.

Provides information about adjustment.

Offers information about periodic maintenance and inspection, cleaning, and lubrication of the unit.

Provides information about installation.

Gives information about handling.

Describes major specifications of the unit.

Describes major mechanisms of the unit.

Provides information about tools required for maintenance and repair.

Appendix D Parts list

Appendix E Lubrication Points Diagram Appendix F Ove r view of Electric

Circuits

Rev.B vii

Lists service parts and gives an exploded view of the unit.

Shows a lubrication drawing of the unit.

Provides electric circuit diagrams and explanations about major elements

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Chapter 1

Product Overview

The TM-L90 is a line-thermal printer for P OS systems that can print o n roll paper or a ticket.

TM-L90 external view

Specifications and Configurations

The TM-L90 is configured by combining features from the list below.

Table 1-1 Specifications and configurations

Features Selection Description

Interface type UB-S01 (RS-232)

Font type

Autocutter setting Partial cut

Paper width selection 38/60/80 mm , etc. For details ab out how to set the paper

Power supply unit type

UB-P02II (IEEE1284 (bidirectional parallel)) etc.

Alphanumeric Japanese Simplified Chinese Traditiona l Chinese Thai Korean

Full cut

Exclusive external power supply unit: PS-175 (North America only)

Use an EPSON-approved in te rfac e boa rd

Use the EPSON-approved main circuit board

For details abou t ho w to set partial or full cut, see Chapter 6, “Installation.”

width, see Cha p t e r 6 , “Installation.”

or PS-180 (power supply packaged specification only) External power supply unit:

Model PS-180 and PS-170

Note: Selections in the table above may be added or changed in the future. dpi: dots per 2 5.4 mm (dots per inch)

Rev.B Product Overview 1-1

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TM-L90 Service Manual

Chapter 2

Troubleshooting Guide

Preparations for Troubleshooting

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

Roll paper cover does not open (cover open lever does no t move)

1. Lift up and remove the cutter cover by inserting a flathead screwdriver or similar tool into the cutout in the main case assembly and spreading it in the d irection of an a rrow.

2. Return the cutter blade to the normal position by rota ting the autocutter knob in the direction of t he arrow. When it is returned to the normal position, a triangle mark becomes visible through the hole in the autocutter frame.

Triangle

mark

Knob

Cutter cover

Cutout

Main case assembly

3. Lift up the roll pa per cover.

Note:

❏

Besides a paper jam, a foreign object, such as a push pin, can cause the autocutter to lock up. If this is the case, follow the same procedure described above to return the cutter to its normal position.

❏

Do not open the cutter cover unless you find that the roll paper cover does not open.

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Paper is jammed inside the printer

CAUTION:

❏

Take care not to let metal objects come into contact with the thermal head. Metal can damage the head.

❏

Do not touch the thermal head or radiation plate. Printing can cause them to become very hot.

Power off the unit and open the roll paper cover. If you cannot open the roll paper cover, see the previous section.

2. Remove the jammed paper.

Please confirm to be attached the holder guide sheet C(#182) and D(#183) when the paper is jammed in spite of doing the above steps. (Refer to Appendix D-12.)

Before Servicing

Pages vi to viii at the beginning of this manual provide precautions you should observe to perform work safely and the necessary information to service this product safely. Always read that information before starting your work.

Diagnosing Failures

Use one of the following methods to identify the area where a failure occurred.

❏ See Table 2-1 for diagnosing failures by the symptom of the problem. ❏ See Table 2-3 on page 2-5 for diagnosing failures from the ERROR LED code. ❏ See Table F-5 on page Appendix F-7when the failure is on the main circuit board unit.

Note:

The explanation of how to use the self test is on page 2-4. The explanation of power on self checks is on page appendix F-4.

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TM-L90 Service Manual

Symptoms and Solutions

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

Table 2-1 Symptoms and Checkpoints

Symptom Checkpoints (by Priority)

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

1. Check the power supply unit. Check that 24V is coming out of the power supply. (See page F-6.)

2. Check the main circuit board unit . (See pag e F-6.)

3. Unplug the printer. Then unplug each motor or head or FFC’s connector from the main boar d on e by on e; pl ug the prin te r back in, and power it on. This will let you know if any motor has burned out and is pulling down the power. (See page 3-13.)

4. Replace the I/F circuit board. (See page 3-11.)

5. Replace the Sub circuit board assembly . (See pa ge 3-20. )

There are missing dots in the print.

The print is thin . Receipt Pri nting

Unevenness occurs in the concentration of the print.

Paper feed failure. Thermal Printing

Drawer kick operation failure. 1. Replace the main circuit board unit. (See page 3-13.)

Missing characters/misprinted characters/font breakdown.

ThermallPrinting Label printing

Label printing

Receipt Printing Label printing

Label Printing

1. Clean the thermal print head assembly. (See page 5-2.)

2. Replace the thermal print head assembly . (See pag e 3-4 . )

3. Replace the main circuit board unit. (See page 3-13.)

4. Replace the Head FFC. (See page 3-13.)

1. Clean the thermal print head assembly. (See page 5-2.)

2. Setting the memory switch. (See page 6-12.)

3. Replace the thermal print head assembly . (See pag e 3-4. )

4. Replace the main circuit board unit. (See page 3-13.)

1. Clean the thermal print head assembly. (See page 5-2.)

2. Replace the thermal print head assembly . (See pag e 3-4. )

3. Replace the main circuit board unit. (See page 3-13.)

1. Check that the roll paper is properl y load ed . (See pag e 7-6. )

2. Replace the main circuit board unit. (See page 3-13.)

3. Replace the receipt paper feed motor. (See page 3-34.)

2. Replace the Sub circuit board assembly . (See pa ge 3-20. )

1. Check the setting for serial communication conditions by Self-

test. (See page 2-4.) You can change the setting with the DIP switch 2 or memory switch (See page 6-10.). Al so yo u can s et with the ’Printer Status’ function in the TM Printer Service & Support Utility. (See the TM Printer Service & Support Utility Operatation Guide.)

2. Replace the interface cable. (See page 6-11. )

ERROR LED is lit . (When it is flash in g, see page 2-5. )

Close the roll paper cover secure.

Rev.B Troubleshooting Guide 2-3

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How to Use the Self-test

There are two types of self-tests. ❏ Print tests

Print Tests

Testing the Thermal Printer

Execute this test using the following procedure.

Table 2-2 Running the thermal printer print test

Step Operation Printer Operation

1 Turn the power supply ON while pressing the

FEED button, and continue to push the FEED button untill ERROR LED is li.

2 Press the FEED button after the PAPER OUT LED

flashes.

The printer will print the status of the printer settings. Afterward, the autocutter will cut the roll paper and the PAPER OUT LED wil l flas h .

The print test will be executed. When the prin t te st is completed, the printer will print ***completed***. The printer will enter the normal printing mode when the test is ended.

Note:

You can interrupt the test print by pressing the FEED button during the test. To continue, press the FEED button again.

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TM-L90 Service Manual

Troubleshooting Using the ERROR LED

You can learn the cause of a failure by checking the ERROR LED code. The following table shows problems and solutions to repair the printer. Numbers in the "Solutions" column indicate the order to use to check t he problem. If you cannot determine the cause of the p roblem after checking all the solutions listed, go back to Table 1-1, earl ier in this chapter.

Automaticall y r ecoverable errors

Automatically recoverable errors ar e not abnorma lities.

Table 2-3 Automatically recoverable errors

Error ERROR LED Blinking Pattern Description Recovery

Print head temperature erro r Approx. 320 msec

The temperature of the print head is extremely high.

❏ Recovers automatically when the

print head cools.

Roll paper cover open error Printing is not performed

correctly due to a cover open.

Paper layout error Label paper or the black mark is

not detected, or the paper layout of the paper installed in the printer and t he set t ing o f the paper layout defined by the GS ( E comman d do not match.

❏ Replace the autocutt er unit. Recovers autom at ically when the roll paper cover is closed.

❏ Recovers automatically when

prpper label paper or the black mark installed in the printer.

Note:

With the memory switch, the “roll paper cover open” error can be specified either as an “automatically recoverable error” or as a “recoverable error.”

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Recoverable errors

Table 2-4 Recoverable errors

Error ERROR LED Blinking Patte rn Descri pt i on Remed y

Autocutter error The autocutter does not wo rk

correctly.

Approx. 5.12sec

Paper layout error Label paper or the black mark is

Roll paper cover open error (when an error that can possibly recover is selected) *1)

not detected, or the paper layout of the paper installed in the printer and t he set t ing o f the paper layout defined by the GS ( E comma n d do not match.

Printing is no t perfo r med correctly due to a cover open

❏ Check to see if paper is jammed

around the autocutter. If so that, remove the jammed paper. After then close the roll paper cover, turn it off, and then turn it on again.

❏ Check for paper dust or foreign

particles attached to th e autocutter blade (See the section, “Cleaning.“i n C h apt er 5 for det ails on how to remove these).

❏ Check the cutter motor sub-

assembly. (see page 2-8.) Replace the motor and th e ma in circuit board unit if th e c ut te r motor sub-assembly has been shorted. (See page 3-39, 3-13.)

❏ Replace the main circui t board

unit to see if the printer is repaired. (See page 3-13.) if The printer is repaired, analyze the defective part by referring to “Main Circuit Board Unit Test Points“. (See page Appendix F-6.)

❏ Replace the autocutt er unit. ❏ Confirm if the error happened by

the jammed paper while printing. If so that, remove the jammed paper. After then close the roll paper cover, turn it off, and then turn it on again

❏ Perform the th r es h old value settin g

for detectors. (See Chapter 4.)

❏ Check if the label paper or the

black mark paper installed in the printer is a cause of the problem.

❏ Check if the paper layout of the

paper installed in the printer and the setting of the paper layout defined by the GS ( E comman d match.

❏ Check for paper dust or foreign

particles attached to the LED holder assembly and the black mark paper det ector circui t board assembly.

❏ Replace the LED holder assembly. ❏ Replace th e black mark paper

detector circuit board assembly.

❏ Close the roll paper cover, turn it

off, and then turn it on ag a in .

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TM-L90 Service Manual

Note:

When a paper jam is present in the autocutter, turn off the unit and remove the jammed paper. Then turn it on again.

Non-recoverable errors

CAUTION:

When any error shown below occurs, turn off the power as soon as possible.

Table 2-5 Non-recoverable errors

Error ERROR LED Blinking Pattern

R/W error in memory or gate array After R/W checking, the printer

Approx. 320 msec

Description Remedy

❏ Replace the main circui t board

does not work correctly.

unit. (See page 3-13.)

High voltage error The power supply voltage is

Low voltage error The power supply voltage is

CPU execution error The CPU executes an incorrect

Interface circuit board error Interface circuit board does not

Drive circuit error One of the following was

Approx. 5.12 sec

extremely high.

extremely low.

address.

work correctly.

detected.

1. Print head thermistor.

2. Level drive motor. assembly.

❏ Replace the power supply unit. ❏ Replace the main circui t board

unit. (See page 3-13.)

❏ Replace the power supply unit. ❏ Replace the main circui t board

unit. (See page 3-13.)

❏ Replace the main circui t board

unit. (See page 3-13.)

❏ Check installation status of the

interface circuit board.

❏ Replace the interfa ce circuit

board. (See page 3-11.)

❏ Replace the main circui t board

unit. (See page 3-13.)

❏ Check installation status of the

interface circuit board.

❏ Replace the head FFC. (See page

3-13.)

❏ Replace the thermal pr int head

assembly . (Se e page 3-4.)

❏ Replace the main circui t board

unit. (See page 3-13.)

❏ Replace the interfa ce circuit

board. (See page 3-11.)

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Test Points on the Printer Mechanism

Before you replace the main circuit board to see if the printer is repaired, you need to check the printer mechanism. If the motor or the coils are shorted, replacing the main circuit board will not fix the problem. The following explains how to test the motors and coils.

Table 2-6 Test points on the printer mechanism

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

Thermal mechanism assembly

Cutter motor subassembly

Paper feed motor

DC brush motor Autocutter drive Remove the cable

connector connecte d to CN8 on the main circuit board. Test between + and -.

4-phase stepping motor

ROTOR

Receipt paper feed

Remove the cable connector connecte d to CN9 on the main circuit board. Test between pin 1 and pin 2 and between pin 3 and pin 4.

There is continuity. (Aproxinately 38 ± 3.8Ω)

Approximately

2.6 Ω (per phase)

2-8 Troubleshooting Guide Rev.B

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TM-L90 Service Manual

Chapter 3

Disassembly and Assembly

Notes for Assembly and Disassembly

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

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.

❏

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 pr in ter if you w ork whil e th e power supp ly i s sti ll attached.

❏

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

❏

Do not perform any work t hat is n ot describ ed in this chapt er . Doin g so may resu lt in injury or damage to the printer.

❏

Do not touch the FPC or FFC pins.

❏

Hold circuit boards only by their edges.

Rev.C Disassembly and Assembly 3-1

Page 23

Confidential

How to Read this Chapte r

Structure of this Chapter

This chapter consists of t he i tems l ist ed in Table 3-1. Reading from the top item to the b ot to m in sequence allows users to disassemble all the serviceable parts.

Table 3-1 Structure of this chapter

1st level 2nd level 3rd level

Disassembly and assembly of the TM-L90

Disassembly and assembly of the printer mechanism

Cutter cover Connector cover I/F circuit board unit Main assembly case Main circuit board un it Cable wiring Roll paper cover unit Roll paper cover unit Platen holder Switch circuit board assembly Sub circuit board assembly Autocutter un it Autocutter un it Thermal print head assembly Hinge cover Label paper guide Reduction gears Label paper holder assembly LED holder assembly and

cover plate spring NE detector assembly Auxiliary holder plate and

side plate guide shaft Circuit board frame Frame R and center frame Front frame Paper feed motor

3-2 Disassembly and Assembly Rev.C

Page 24

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TM-L90 Service Manual

Shortest Route for Disassembly of Major Parts

The next diagram shows the shortest disassembly route of major parts. Perform disassembly by following this diagram as well as explanations for the target item. For the disassembly procedure of the thermal print head, see page 3-4.

Start

Cutter cover

Thermal print

Connector

cover

head assembly

I/F circuit board

Auto cutter unit

Switch circuit

board assembly

Paper feed

motor

Main assembly

case

Main circuit

board unit

Label paper

holder

unit

N.E. detector

assembly

Sub circuit board

assembly

Representation of Small Parts

The standard small parts used in this chapter (such as screws, washers, and nuts) are all indicated with abbrev iations. For details, see Appendix D, “Parts List.”

Cover detector

assembly

Rev.C Disassembly and Assembly 3-3

Page 25

Confidential

Replacing the Thermal Print Head Assembly

CAUTION:

❏

This job may be performed only after turning off the printer and waiting for approximately 10 minutes. The th ermal print head assembly may be hot, and otherwise, you might get burned.

❏

When performing this job, take anti-static measures, such as wearing a grounded wrist band. Failure to do so may result in thermal print head failure.

❏

Do not touch the print head (portion that appears like a black line, and the adjacent areas) in the th er ma l prin t he ad a sse mbl y. Touc hi ng thi s area may result in thermal print head failure.

❏

When the thermal print head assembly is contaminated or has a deposit of foreign particles, wipe it off with a cotton swab moistened with alcohol.

1. Open the roll paper cover.

2. Remove the cutter cover by spreading area of the main case assembly, as shown below:

Roll paper cover

Cutter cover

Main case assembly

3-4 Disassembly and Assembly Rev.C

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TM-L90 Service Manual

3. Users may choose between partial cut and full cut by adjusting the autocutter unit to the desired position. Check the part shown below to see if the autocutter is set to full cut or partial cut. When you install the autocutter unit, return the unit to the user’s position.

Dowel

The dowel positions are marked “F” and “P.”

To select partial cut: adjust the dowel to the position marked P.

To select full cut: adjust the dowel to the position marked F.

4. Remove the autocutter unit by removing the two S4 screws securing it. Stand the remo ved autocutter unit against the front of the printer.

Autocutter unit

Rev.C Disassembly and Assembly 3-5

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Confidential

5. While holding the two head holder springs so they do not fly out, pul l ou t t h e spr ing hold er plate.

CAUTION:

Be sure to hold the two head holder springs while removing spring holder plate. Otherwise, head holder springs may suddenly fly out, creating the danger of eye injury.

Head holder springs

Spring holder plate

6. Lift up the therma l print head as sembly and rem ove the head FFC from the therm al print head assembly.

CAUTION:

To prevent static-generated failures, keep the removed thermal print head assembly in an anti-static bag or other suitable container.

Thermal print head assembly

Head holder spring

Spring holder plate

3-6 Disassembly and Assembly Rev.C

Page 28

Confidential

Follow the steps below to assemble the parts.

1. Attach the insulating tape on the new thermal print head assembly, as shown below; then lubricate with G-45 along the surfaces on both ends of the head assembly.

G-45

Insulating ta pe

2. Attach the head FFC to the connector of the thermal print head assembly.

3. Place the thermal print head assembly in its installation position inside the printer.

4. Insert the two head holder springs onto the two dowels on the spring holder plate by rotating them.

TM-L90 Service Manual

G-45

Head holder springs

Spring holder plate

5. Insert the two head holder springs into the groove in the thermal print head assembly.

6. While holding the two head holder springs so they do not fly out, install the spring holder plate.

CAUTION:

Be sure to hold the two head holder springs while installing the spring holder plate. Otherwise, the head holder springs may suddenly fly out, creating the danger of eye injury.

7. Adjust the two head holder springs so they are perpendicular with the thermal print head assembly.

8. Attach the autocutter unit in its installation position. At this time, align the two dowels on the frame assembly with the two slits in the autocutter unit.

Rev.C Disassembly and Assembly 3-7

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Confidential

9. Set the autocu tter unit to the user’s position (partial cut or full cut).

To select partial cut: adjust the dowel to the position marked P. To select full cut: adjust the dowel to the position marked F.

Dowel

10. Secure the autocutter unit with the two S4 screws.

Note:

• When tightening the screws, do not deform th e frame assembly. This can d ecrease the sh arpness of the cutter.

• Do not tighten the autocutter unit when the dowels are not properly engaged. This can also decrease the sharpness of the cutter.

11. Install the cutter cover.

12. Close the roll paper cover.

3-8 Disassembly and Assembly Rev.C

Page 30

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TM-L90 Service Manual

Disassembly and Assemb ly of the TM-L90

First Level

Cutter Cover

1. Open the roll paper cover.

2. Remove the cutter cover by spreading area of the main case assembly, as shown below:

Ro ll paper cover

Main case assembly

Cutt er cover

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-9

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Confidential

Connector Cover

1. With the main assembly upside down, remove the connector cover by pressing its rear section and unhooking the two claws.

Clawonnector cover

Install in th e reverse seq uence of removal.

3-10 Disassembly and Assembly Rev.C

Page 32

Confidential

I/F Circuit B oard Unit

1. With the main assembly upside down, remove two S6 screws.

2. Remove the I/F circuit board unit.

I/F circuit board unit

TM-L90 Service Manual

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-11

Page 33

Confidential

Main Case Assembly

1. With the main assembly upside down, remove two S5 screws and one S3 screw.

2. Remove the main case assembly.

Main case assembly

CAUTION:

When installing the case, do not pinch the lead wire. Doing so may cause failures.

Install in th e reverse seq uence of removal.

3-12 Disassembly and Assembly Rev.C

Page 34

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TM-L90 Service Manual

Main Circuit Board Unit

1. Remove the cutter lead wire from connector . Then, remove the insulating tape securing the lead wire.

When installing, route the cutter lead wire as shown below, and then fix with the insulating tape.

Right side viewFront view

Cutter lea d wire

Insulating tape

Cutter lead wire

2. Remove four S6 screws and remove the bottom plate. (See the illustration on the next page.)

3. Remove lead wire from the connector on the main circuit board unit.

4. Remove four S6 screws. (See the illustration on the next page.)

Note:

When tightening the four S6 screws, tighten in the order and . The other two places can be tightened in any order, but should be tightened diagonally.

5. Remove the head FFC from connector on the main circuit board unit.

6. Remove the three lead wires from the main circuit board unit connector, in the order of ,

, and .

7. Remove the switch circuit board FFC from connector on the main circuit board unit.

Note:

When replacing the switch circuit board FFC, note that the switch circuit board FFC is not bent when provided as a service part. Ben d it in the sam e way as th e one that was in stalled into the p rinter. When installing, hook the bent portion against the circuit board frame.

8. Remove the main circuit board unit.

Rev.C Disassembly and Assembly 3-13

Page 35

Confidential

Main circuit board unit

Bottom plate

Install in th e reverse seq uence of removal.

3-14 Disassembly and Assembly Rev.C

Page 36

Confidential

TM-L90 Service Manual

Disassembly and Assembly of the Printer Mechanism

Note:

The term “printer mechanism” is used only for convenience in this document; there are no parts in the actual product that use this name.

First Level

Cable Wiring

1. Remove the lead wire of the LED holder assembly from one hook.

2. Remove the lead wire of the paper feed motor from two hooks.

3. Remove the NE detec tor lead wir e from the hook on the f ra me L assembly. When insta lling , see the figure below and hook the NE detector lead wire onto the frame L assembly by wrapping around it twice.

CAUTION:

When removing the lead wire, take precautions against damaging the cable.

Hook

Lead wire of the

NE detector lead wire

Hook

Lead wire of the

paper feed motor

LED holder assembly

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-15

Page 37

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Roll Paper Cover Unit

1. Release the two tabs on the label paper guide from the roll paper cover unit.

Tabs

Label paper guide

2. Remove the insulating tape that is securing the lead wire of the BM (black mark) paper detector circuit board assembly.

Lead wire

Insulatin g tap e

3-16 Disassembly and Assembly Rev.C

Page 38

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TM-L90 Service Manual

3. Remove one S1 screw to rel ease the ground wire of the BM paper detector circuit board assembly.

Ground wire

4. Disconnect the lead wire of the BM paper detector circuit board assembly from the switch circuit board assembly, and remove the ferrite core.

When assembling, pass the lead wire into the ferrite core twice so that you make one loop, as shown below.

Ferrite core

Connector

Insulatin g tap e

Lead wire (make one loop)

Rev.C Disassembly and Assembly 3-17

Page 39

Confidential

5. Remove the two E-rings (E2).

6. Remove the two cover rotation shafts by pressing them inside.

7. Remove the roll paper cover unit. Then, pull the lead wire of the BM paper detector circuit board assembly out through the clearance in the hinge cover.

Roll paper cover unit

Cover rotation shafts

Hinge cover

To remove the roll paper cover unit, position the cover unit as shown below and pull out the unit in the di rection shown with the arrow in the illustration.

Roll paper cover unit

Note:

When you need to disassemble or assemble the roll paper cover unit further, see page 3-35 for instructions.

Install in th e reverse seq uence of removal.

3-18 Disassembly and Assembly Rev.C

Page 40

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TM-L90 Service Manual

Switch Circuit Board Assembly

1. Remove the cover detector lead wire and the switch circuit board FFC from the switch circuit board assembly.

2. Remove two S2 screws.

3. Remove the switch circuit board assembly by spreading the two hooks of the switch panel holder.

Switch circuit board assembly

Switch panel holder

Cover detector lead wire Switch circuit board FFC

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-19

Page 41

Confidential

Sub Circuit Board Assem bly

1. Remove two S6 screws.

2. Remove the sub circuit board assembly by pulling it up diagonally and out.

Sub circuit board assembly

Install in th e reverse seq uence of removal.

3-20 Disassembly and Assembly Rev.C

Page 42

Confidential

TM-L90 Service Manual

Autocutter Unit

1. Users may choose between partial cut and full cut by adjusting the autocutter unit to the desired position. Check the part shown below to see if the autocutter is set to full cut or partial cut. When you install the autocutter unit, return the unit to the user’s position.

Dowel

The dowel positions are marked “F” and “P.”

To select partial cut : ad just the dowel to the position marked P.

To select full cut: adjust the dowel to the position marked F.

2. Remove the two S4 screws.

3. Remove the autocutter unit.

Autocutter unit

Frame assembly

Note:

When you need to disassemble or assemble the autocutter unit further, see page 3-39 for instructions.

Rev.C Disassembly and Assembly 3-21

Page 43

Confidential

Install with the following steps:

1. Attach the autocutter unit in its installation position. Then, align the two dowels on the frame assembly with the two slits in the autocutter unit.

2. Set the autocu tter unit to the user’s position (partial cut or full cut). To select partial cut: adjust the dowel to the position marked P. To select full cut: adjust the dowel to the position marked F.

Dowel

3. Secure the autocutter unit with the two S4 screws.

Note:

❏

When tightening the screws, do not deform the frame assembly. This can decrease the sharpness of the cutter.

❏

Do not tighten the autocutter unit when the dowels are not properly engaged. This can also decrease the sharpness of the cutter.

3-22 Disassembly and Assembly Rev.C

Page 44

Confidential

Thermal Print Head

TM-L90 Service Manual

CAUTION:

❏

This job may be performed only after turning off the printer and waiting for approximately 10 minutes. The thermal print head assembly may be hot, and otherwise, you might get burned.

❏

When performing this job, take anti-static measures, such as wearing a grounded wrist band. Failure to do so may result in thermal print head failure.

❏

Do not touch the print head (portion that appears like a black line, and the adjacent areas) in the th er m al prin t he ad asse mbl y. Touc hi ng thi s area may re sul t in thermal print head failure.

❏

When the thermal print head assembly is contaminated or has a deposit of foreign particles, wipe it off with a cotton swab moistened with alcohol.

1. While holding the two head holder springs so they do not fly out, pul l ou t t h e spr ing hold er plate.

CAUTION:

Be sure to hold the two head holder springs while removing spring holder plate. Otherwise, head holder springs may suddenly fly out, creating the danger of eye injury.

Head holder springs

Spring holder plate

Rev.C Disassembly and Assembly 3-23

Page 45

Confidential

2. Remove the two head holder springs from the spring holder panel by rotating them.

3. Lift up the therma l print head as sembly and rem ove the head FFC from the therm al print head assembly.

CAUTION:

To prevent static-generated failures, keep the removed thermal print head assembly in an anti-static bag or other suitable container.

Thermal print head assembly

Head holder spr ing s

Spring holder plate

Head FFC

3-24 Disassembly and Assembly Rev.C

Page 46

Confidential

Install using the following steps:

1. Attach the insulating tape on the new thermal print head assembly, as shown below; then lubricate with G-45 along the surfaces on both ends of the head assembly.

G-45

TM-L90 Service Manual

Insulatin g tap e

2. Insert the head FFC into the connector of the thermal print head assembly.

3. Pass the head F FC thr ough as indicated wit h the ar row i n the drawi ng on the pr evious page, and place the thermal print head assembly in the installation position.

4. Insert the two head holder springs onto the two dowels on the spring holder plate by rotating them.

Head holder springs

Spring holder plate

5. Insert the two head holder springs into the groove in the thermal print head assembly.

6. While holding the two head holder springs so they do not fly out, install the spring holder plate.

G-45

CAUTION:

Be sure to hold the two head holder springs while installing the spring holder plate. Otherwise, the head holder springs may suddenly fly out, creating the danger of eye injury.

7. Adjust the two head holder springs so they are perpendicular with the thermal print head assembly.

Note:

Please take care the following explanation to exchange the thermal print head with new type.

If the printer has the old thermal print head, the plastic sheet that the head is installed on need to be cut. (Refer to “Importaint Note About Installing Thermal Print Head“ on page 3-52.)

Rev.C Disassembly and Assembly 3-25

Page 47

Confidential

Hinge Cover

1. Remove two S1 screws and one S2 screw.

2. Remove the hinge cover by spreading the two hooks.

3. Remove the feed sheet from the hinge cover.

4. Remove the DIP switch cover from the hinge cover.

Hinge cover

Feed

sheet

DIP switch cover

Install in th e reverse seq uence of removal.

3-26 Disassembly and Assembly Rev.C

Page 48

Confidential

TM-L90 Service Manual

Label Paper Guide

Remove the label paper guide by raising it and pulling it out from the label paper holder groove.

Label paper ho ld er

Label paper guide

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-27

Page 49

Confidential

Reduction Gears

1. Remove one E-ring (E2).

2. Remove reduction gear C.

3. Remove reduction gear D.

Reduction gear D

Reduction gear C

Install using the following steps:

1. Lubricate the two reduction gear shafts with G-45, in a line-shape.

2. Install reduction gear D.

Note:

When installing reduction gears C and D, see the drawing and install them in the correct directions.

3. Install reduction gear C.

4. Secure with one E-ring (E2).

3-28 Disassembly and Assembly Rev.C

Page 50

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TM-L90 Service Manual

5. Lubricate half of reduction gear C with G-45.

6. Lubricate the contact area of frame R and the front frame with G-36.

7. Lubricate the contact area of the frame L assembly and the front frame with G-36.

8. Lubricate the contact area of the right side of the center frame and the circuit board frame with G-36.

9. Lubricate the right side of the center frame and the groove in frame R with G-36.

Center frame

Frame R

Circuit

board

frame

Frame L assembly

Frame R

Front

frame

Rev.C Disassembly and Assembly 3-29

Page 51

Confidential

Label Paper Holder

1. Remove the lead wire of the LED holder assembly from between the center frame and the front frame.

2. Remove the S1 screw.

3. Pull the label paper holder out straight along the grooves in the frame L assembly and frame R.

Frame L assembly

Front frame

Center frame

Frame R

Install using the following steps:

1. Pass the lead wire of the LED holder assembly through to the front, between the center frame and the front frame.

2. Press in and slide the label paper holder straight along the grooves in the frame L assembly and frame R, until it hits the stop.

Label paper holder

CAUTION:

When installing the label paper holder, do not pinch the cables.

3. Tighten the S1 screw.

3-30 Disassembly and Assembly Rev.C

Page 52

Confidential

Circuit Board Frame

1. Remove four S4 screws.

2. Remove the circuit board frame.

Frame L assembly

TM-L90 Service Manual

Insulatin g ta pe

Frame R

Circuit board frame

Install using the following steps:

1. Affix insulating tape on the right side of the circuit board frame, as shown in the photo above.

2. Install the circuit board frame. Then, align the dowels on the circuit board frame with the holes in the frame L assembly and frame R.

3. Tighten the four S4 screws. See the drawing to locate the screw holes.

Rev.C Disassembly and Assembly 3-31

Page 53

Confidential

Frame R and Center Frame

1. Remove one S4 screw .

2. Remove frame strengthening plate R.

3. Remove one S4 screw .

4. Remove frame R.

5. Remove the center frame.

6. Remove one switch screw and remove the cover detector assembly from frame R.

Frame L assembly

Center frame

Frame strengthening plate R

Frame R

Cover detector assembly

Switch screw

Insulating tape

Install using the following steps:

1. Affix the insulati ng ta pe on the cov er de tect or assembly , as shown in the photo above. (This process is necessary only if the original cover detector assembly has the insulation tape affixed.)

2. Install the cover detector assembly onto frame R and secure with one switch screw. Then, align the front and back so that the protrusion on the switch faces the position marked on frame R.

3. Install the center frame. Then, route the lead wire of the paper feed motor forward. Align two dowels on the center frame with two holes in the frame L assembly.

4. Install frame R.

5. Tighten one S4 screw at .

6. Install frame strengthening plate R.

7. Tighten one S4 screw at .

3-32 Disassembly and Assembly Rev.C

Page 54

Confidential

Front Frame

1. Remove one S4 screw.

2. Remove frame strengthening plate L.

3. Remove the front frame.

TM-L90 Service Manual

Frame strengthening plate L

Front frame

Install in th e reverse seq uence of removal.

Rev.C Disassembly and Assembly 3-33

Page 55

Confidential

Paper Feed Motor

1. Remove two W1 washers and one motor ground plate by removing three N1 nuts.

2. Slide out the paper feed motor from the hole in the frame L assembly.

3. Remove the three paper feed motor dampers from the paper feed motor.

4. Remove the three spacers from inside the three paper feed motor dampers.

Motor ground plate

Spacer

Paper feed motor damper

Frame L assembly

Spacer

Paper feed motor

damper

Paper feed motor

Spacer

Paper feed motor damp er

Install using the following steps:

1. Insert the three spacers into the three paper feed motor dampers.

2. Insert the motor dampers into the three holes in the frame L assembly.

3. Install the paper feed motor. To do this, insert the motor shaft into the cutout in the frame L assembly; then insert the three screws on the motor into the h oles in the three paper fee d motor dampers.

4. Install two W1 washers and one motor ground plate. Then, make sure the ground plate touches the frame L assembly. If you insert the ground plate in an incorrect way, it does not touch the frame.

5. Tighten the three N1 nuts with the specified torque of 34.3 to 39.2 Ncm (3.5 to 4.0 kgcm) in the order shown in the illustration above. Make sure the motor ground plate is attached at the angle shown in the illustration above.

CAUTION:

Tighten the three nuts with th e specified torque. If you overtighten these nuts, the screws on the paper feed motor become loose when y ou loosen the nuts the next time.

3-34 Disassembly and Assembly Rev.C

Page 56

Confidential

TM-L90 Service Manual

Second Level

Roll Paper Cover Unit

1. Remove one E2 type E retaining ring, and sl ide the lever shaft to remove th e lever button.

Lever button

Lever shaft

2. Remove the lead wires of the BM (black mark) paper detector circuit board assembly from the roll pap er cover unit. When assembling, thre ad the wires as shown below.

Bend

Pass through the hole

Hook with the clamp

Rev.C Disassembly and Assembly 3-35

Page 57

Confidential

3. Remove the three S1 screws and remove the platen holder.

CAUTION:

When removing the screws near the platen gear, take precautions against touching the gear with the screwdriver. Do not use a screwdriver with a short handle and/or thick shaft, as it can easily touch the gear. Touching the gear may damage it.

Note:

When you need to disassemble or assemble the platen holder further, see page 3-47 for instructions.

4. Remove one E2 type E retaining ring and remove the FEED button.

5. Remove the feed spacer from the FEED butto n.

Roll paper cover

Feed spacer

FEED button

Double-sided adhesive tape side

3-36 Disassembly and Assembly Rev.C

Page 58

Confidential

6. Peel off spacer B.

When assembling, affix the spacer as shown below.

TM-L90 Service Manual

Spacer B

7. Peel off the mini-clamp. When assembling, affix it in the direction shown below.

Mini-clamp

Rev.C Disassembly and Assembly 3-37

Page 59

Confidential

8. Remove the two hinge spacers from the roll paper unit. When assembling, make sure you insert the spacers in the direction shown below.

Hinge spacer

Glossy surface

Hinge spacer

Install in th e reverse seq uence of removal.

3-38 Disassembly and Assembly Rev.C

Page 60

Confidential

Autocutter Unit

1. Remove two manual cutter screws .

2. Remove the manual cutter.

CAUTION:

The manual cutter has a sharp blade. Handle it with care.

3. Remove one manual cutter screw .

4. Remove the paper cutter cover assembly.

5. Remove one switch screw.

6. Remove the micro switch.

7. Remove the lead wires of the micro switch and the cutter motor from the hooks.

8. Remove the two S9 screws.

TM-L90 Service Manual

Note:

When removing the screws near the paper cutter cover, insert a screwdriver into the gap between the paper cutter cover and the cutter driving gear. Do not damage the gear.

9. Remove the cutter motor sub assembly.

Note:

When removing the cutter motor sub assembly, pull it out straight so not to catch the cutter motor gear in the hole in the paper cutter assembly cover.

Manual cutter

Paper cutter cover assembly

Manual cutter screw

Cutter motor gear

Cutter frame assembly

Cutter motor sub assembly

Manual cutter screw

Cutter driving gear

Micro switch

Hook

Switch screw

Rev.C Disassembly and Assembly 3-39

Page 61

Confidential

Install using the following steps:

Cutter driving gear

Reduction A/C gear

Manual cutter

screw

Triangle

mark

Manual cutter screws

Cutter motor gear

Center of the contact area between the cutter worm

gear and the paper cutter cover assembly

Movable blad e

Round hole

Cutter worm gear

Long hole in the

movable blade

Label

Cutter frame assembly

face

Manual cutter

Paper cutter cover

assembly

Cutter motor sub assembly

1. Install the cutter motor sub assembly. Then, see the drawing to insert it correctly so that the label side faces the right direction.

2. Tighten the two S9 screws.

3. Install the micro switch. The switch must face the shaft side, and one dowel on the back must align with the ho le in the pap er cutter co ver assembly .

4. Hold the lead wire of the micro switch to the side of the cutter motor and secure it with the hook, toget her with the lead wire fro m the cutter motor sub assembly.

5. Tighten one switch screw.

6. Lubricate two areas on the long hole in the movable blade in a line-shape with G-15. The blade is located in the cutter frame assembly.

7. Adjust the position of the mova ble blade so that the round hole in the cutter frame assembly is visible through the long hole in the movable blade.

8. Lubricate halfway around the center of the contact area with G-36 between the cutter worm gear located in the paper cutter cover assembly and the paper cutter cover assembly.

9. Lubricate once around the cutter driving gear, which is located on the paper cutter cover assembly, with G-36.

10. L ubricat e halfw ay aroun d the cut ter moto r ge ar, loc ated on the pape r cu tter co ver as sembly, and the reduction A/C gear, with G-36.

3-40 Disassembly and Assembly Rev.C

Page 62

Confidential

11. Adjust the position of the cutter driving gear so that the triangle mark on the cutter driving gear becomes visible through the hole in the paper cutter cover assembly.

12. Install the paper cutter cover assembly onto the cutter frame assembly.

TM-L90 Service Manual

CAUTION:

Do not pinch the lead wire between the paper cutter co ver assembly and the cutter frame assembly.

13. Tighten one manual cutter screw at on the previous page.

14. Install the manual cutter by aligning the two holes in it with the two dowels on the paper cutter cover assembly.

15. Tighten the two manual cutter screws at on the previous page.

Rev.C Disassembly and Assembly 3-41

Page 63

Confidential

LED Holder and Cover Plate Spring

1. Pull out the LED holder assembly from the label paper holder while pressing both claws inside.

2. Remove the cover leaf spring.

Label paper holder

LED holder assembly

Lead wire

Cover leaf spring

Install using the following steps:

1. Press in the cover leaf spring into the label paper holder.

2. Install the LED holder assembly. Then, pass the lead wi re through first, and then insert the LED holder assem bly into the label paper holder.

3-42 Disassembly and Assembly Rev.C

Page 64

Confidential

TM-L90 Service Manual

NE Detector Assem bly

1. Remove the NE detector lead wire from the hook on the label paper holder.

2. Remove one E1 ty pe E retaining ring.

3. Remove the NE detector adjustment screw by rotating it with a coin.

4. Remove the N1 hex nut and the NE detector assembly.

5. Remove the NE detector lead wire from the hook of the NE detector holder, and remove it from the micro switch connector.

6. Remove the NE detector lever by lightly pressing the two keys inside.

7. Remove one S7 screw.

8. Remove the micro switch.

NE detector adjust ment screw

NE detector

lever

NE detector holder

Micro switch

NE detector lead wire

Label pape r hol de r

Rev.C Disassembly and Assembly 3-43

Page 65

Confidential

Install using the following steps:

1. Affix insulating tape on the NE detector lead wire as shown in the photo below. (This process is necessary only if the original NE detector lead wire has insulation tape affixed.)

Insulating tape

2. Install the micro switch by aligning one key with the hole in the NE detector holder and secure with one S7 screw.

3. Install the NE detector lever by pressing the two keys inside.

4. Connect the NE detector lead wire to the micro switch connector and hook it to the NE detector holder.

5. Install the NE detector assembly by placing it temp orarily, facing the left slanting diagonally.

6. Fit the N1 hex nut and install the NE detector adjustment screw. Rotate the NE detector adjustment screw with a coin, until the groove in it comes out of the N1 hex nut.

7. Install one E1 type E retaining ring into one groove in the NE detector adjustment screw.

8. Align the NE detector assembly straight, and further tighten the NE detector adjustment screw.

9. Hook the NE detector lead wire to the label paper holder.

NE detector assembly

NE detector lead wire

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Auxiliary Holder Plate and Side Plate Guide Shaft

1. Remove one S10 screw.

2. Disengage both project i ons located in the lower part of the au xiliary holder plate, and pull out the auxiliary holder plate downward, at an angle.

3. Remove the eight paper holding rollers.

4. Remove the two E1 type E retaining rings, and pull out the side plate guide shaft.

5. Remove the spacer guide plate while pushing up one front claw of the label paper holder.

Paper holding rollers

Side plate guide shaft

S10

Auxiliary holder plate

Paper holding rollers

Label paper holder

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Install in th e reverse seq uence of removal.

After you ha ve installed the paper holding rollers, lubri cate with G-45 at the 16 point s shown below.

G-45

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TM-L90 Service Manual

Third Level

Platen Holder

1. Remove the fixed blade from the platen holder by raising the blade. When installing the fixed blade, see the drawing below to check the installation direction.

CAUTION:

The fixed blade is sharp. Handle it with care.

Fixed blade

2. Remove the two tension plate springs.

Tension plate spring

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3. Pull out the l ever shaft and remove one E2 type E ret aining ring.

Lever shaft

4. Remove the cover open lever.

Cover open lever

5. Remove the lead wire of the BM (black mark) detection set board from the hooks of the platen holder.

Hooks

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6. Remove two S1 screws, and remove the BM detector holder.

BM detector holder

When you assemble the BM detector holder, make sure the shield plate fits into place as shown below.

TM-L90 Service Manual

NG (This portion of the shield plate goes up slightly.)

7. Pull the lead wire of the BM paper detector circuit board assembly out of the hole in the platen holder.

Hole

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8. Remove one S1 screw; then, remove the shield plate.

Shield plate

9. Remove one S1 screw, and remove the BM paper detector circuit board assembly.

BM paper detector circuit board assembly

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10. Remove the fixed blade holder spring by lifting up the claw.

Note:

The claw of the fixed blade holder spring is hooked to the platen holder. When removing it, do not pull forcibly, as this may result in deformation. When installing it, make sure the claw has been hooked.

Fixed blade holder spring

11. Remove the two E2 type E retaining rings and one paper feed roller shaft holder; then remove the platen assembly.

Note:

When installing the paper feed roller shaft holder, see the drawing and engage it to the platen holder in the correct direction.

Platen holder

Paper feed roller shaft holder

Platen assembly

Install in th e reverse seq uence of removal.

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Important Note About Installing Thermal Print Head

Please follow these instructions to install the new thermal print head correctly. Note that the new head has a spacer on it.

1. Cut the plast ic sheet with a cutting tool such as a cutter knife. Be sure not to cut the surrounding parts.

2. Install the new thermal print head in the correct position.

✄

sheet

spacer

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TM-L90 Service Manual

Chapter 4

Adjustment and Settings

Threshold Value Setting for Detectors

Perform this setting when you have replaced any of the following.

Items Requiring Setting

❏ LED holder assembly ❏ BM paper detector circuit board assembly ❏ Main circuit board unit

Note:

If you do not perform this setting or perform it incorrectly, the printer generates the paper layout error. See the section, “Error types and Processing,” in Chapter 2 for the description of the error.

Follow the steps below to exec ute the setting.

1. Install any of the following specified paper rolls for the detector setting.

Original paper or specified paper for detector setting

TF50KS-E (Nippon Paper Industries Co.,Ltd.) P350 (Kanzaki Specialty Paper (USA)) KF50 (KANZAN Spezialpapiere GmbH (Germany))

Note:

You cannot make an accurate setting if you do not use the specified paper shown above.

2. With the roll paper cover opened, turn the power on while pressing the FEED button.

3. Press the FEED button again eight times.

4. Close the roll paper cover.

5. The printer performs the setting. Once the setting value is printed on the roll paper, the setting is finis hed. (The printer power may b e turned off autom atically, depending on the DIP switch setting.)

The setting value is stored in NV memory on the main circuit board unit.

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Note:

For details about the settings listed below, see Chapter 6, “Installation.”

❏

Setting for the position of the roll paper near-end detector

❏

Setting for the roll paper cutting method

❏

Roll paper width setting

❏

DIP switch settings

❏

NV memory settings

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TM-L90 Service Manual

Chapter 5

Maintenance, Inspection, Lubrication, and Cleaning

Periodic Maintenance or Inspection

There are no parts in this product that require periodic maintenance or inspection.

Lubrication

There are no parts in this product that require periodic lubrication.

Lubrication is required during disassembly and assembly. Observe the instructions on lubricants and lubrication points described in Chapter 3, “Disassembly and Assembly.”

The table below lists the lubricants used in this product.

Table 5-1 Lubricants

Type Name

Grease G-15

G-36 G-45

Cleaning

Recommended Cleaning

It is recommended that you perform the following cleaning during repair. Observe the precautions in the front of Chapter 3 before cleaning.

Table 5-2 Recommended cleaning

Checkpoints Cleaning method

Whether any dust or foreign material adheres to thermal print head.

Whether any paper dust or foreign material adheres to LED holder assembly.

Whether any paper dust or foreign material adheres to BM paper detector circuit board assembly.

Whether any paper dust or foreign material adheres to platen assembly.

Whether any paper dust or foreign material is present on the cutter blade.

Whether any paper dust, dirt, or foreign material adheres to or is inside other parts.

See “Cleaning the thermal head” section in this chapter.

Remove the dust or foreign material with a cotton swab lightly dampened with wa ter.

Remove the dust or foreign material with l a cotton swab lightly dampened with wa ter.

Clean the platen with a cotton swab or cloth lightly dampened with water.

Wipe off with dr y cl o t h or c o tt on swab.

Clean thorou g hl y us in g a small vacuum cle an er for computer equipment.

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Cleaning the Case

Use a dry cloth or lightly dampened cloth to clean the case. Disconne ct 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 .

Cleaning the Thermal Head

CAUTION:

❏

Turn off the printer power before cleaning.

❏

Note that the thermal head (thermal element and radiation plate) becomes very hot during normal operation, creating the danger of burn injury. Be sure to wait for about 10 minutes after turning printer power off bef ore beginning the cleaning.

1. Open the paper roll cover.

2. Clean the thermal element (the area that looks like it is marked with a thin black line) of the thermal head with a cotton swab moistened with an alcohol solvent (ethanol, methanol, or IPA).

CAUTION:

Never touch the thermal element with your hands. Doing so can damage the thermal elements.

Radiation plate

Head chip

Driver IC

Connector

3. After confirming that the alcohol solvent has dried completely, close the paper roll cover.

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Chapter 6

Installation

Installation Precautio ns

CAUTION:

❏

Do not place the printer in an unstable place (such as on an unsteady base or on a slanted surface). The unit may fall or drop, and may cause injury.

❏

Do not place the printer in a location where it is exposed to excessive humidity or dust. It may malfunction or cause fire.

❏

Do not wire cables other than as instructed in this document. Improper wiring may cause malfunction or fire.

Installation Position

TM-L90 Service Manual

This printer can be installe d vertically, horizontally, or mounted on the wall. If you change the installation po sition, you also need to set the installation position of the roll pape r near-end detector. (Refer to the section, "Setting the Installation Position of the Roll Paper Near-End Detector," in this chapter.)

Vertical Installation

Place the printer with the paper exit facing forward.

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Horizontal Installation

Place the printer with the paper exit facing upward. When you install the printer horizontally, perform the following steps.

1. Attach the switch panel label as shown below.

Switch panel labell

2. If the autocutter is set to full cut, attach the paper outlet guide using the paper outlet tape (double-sided tape) as shown below.

paper outlet guide

paper outlet tape

paper outlet guide

Note:

If you install the printer horizontally and choose full cut without attaching the paper outlet guide, the cut paper falls inside the paper path, which can result in dou ble-cuts, a paper jam, or cutter error. However, if the printer is installed vertically or partial cut is chosen, the paper outlet guide is not necessary.

Wall Mounting

The printer can be attached to the wall by using the wall hanging bracket (WH-10). When you are going to use the printer by mounting it on a wall, see the installation manual that comes with the wall hanging bracket.

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

This printer allows you to change the installation position for th e roll paper ne ar-end detector using the following procedure. Set the detector based on whether your printer is installed vertically or horizont ally.

1. Loosen the detecto r adjustment scre w with a coin or similar t ool. Tur n the screw at le ast 3 or 4 times.

2. Push the detec tor lever in u ntil 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.

tab

Detector adjuat screw

4. Secure the detector adjustment screw.

5. Make sure the detector lever moves smoothly.

Hole for vertical installation or wall mount

Hole for horizontal installation

Detector lever

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Adjusting the Detecting Point of the Roll Paper Near-End Detector

Below are two reasons for the roll paper to require an NE detector adjustment.

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

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 tab in the direction shown below.

#2 settin g

Detector adjustment screw

Vertical installation or wall mounting

The table below shows the diameter at which the near-end detector is triggered. Note that this figure is a calculated value, and there may be some vari ations, depend ing on the pr inter.

Table 6-1 Detection point of roll paper near-end

Detector position Trigger point (diameter of paper roll)

#1 setting Approx. 36 mm {1.42”} #2 setting Approx. 41 mm {1.61”}

4. Tighten the detector adjustment screw.

Tab

#1 setting

Horizontal insta llation

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

6. Replace the paper roll.

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Setting the Paper Roll Cutting Method

You can choose be tween partial cut and full cu t by adjustin g the autocutter unit to the desired position. The steps below show the setting of the cutting method.

Note:

❏

Once the printer is used, do not chan ge the cutting method from partia l cut to full cut, because of the difference in the wear rate on the blades between the areas where the paper passes and the paper does not pass, which can result in a paper-cutting problem. However, if the printer is new, you ca n c hange the cutting method from partial cut to full cut.

❏

If the printer is installed horizontally and full cut is chosen, attach the paper outlet guide. (See page 6-

2.) If it is not attached, the cut paper falls inside the paper path, which can result in double-cuts, a paper jam, or cutter error.

1. Open the roll paper cover.

2. Remove the cutter cover by spreading area of the main assembly case, as shown below:

Cutter cover

3. Remove two S4 screws.

Roll paper cover

Autocutter

unit

Main assembly case

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4. Adjust the autocutter unit to the desired position.

To select partial cut: adjust the dowel to the position marked P. To select full cut: adjust the dowel to the position marked F.

Dowel

5. Secure the autocutter unit with the two S4 screws. Make sure the two dowels on the frame assembly engage the two slits in the autocutter unit.

Note:

• When tightening the screws, do not deform th e frame assembly. This can dec rease the sh arpness of

the cutter.

• Do not tighten the autocutter unit when the dowels are not properly engaged. This can also

decrease the sharpness of the cutter.

6. Install the cutter cover.

7. Close the roll paper cover.

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TM-L90 Service Manual

Setting the Paper Roll Width

The TM-L90 accommodates 80 mm {3.15"} wide paper rolls with no adjustments. For rolls from 38 to 70 mm {1.5 to 2.76"} wide, use the label paper spacer included with the printer.

Note:

Once the printer is used, do not change the paper width from narrow to wide. Otherwise printing problems and paper-cutting problems may occur. There are two reasons for this restriction, as follows.

❏

The area on the print head where paper does not pass can be worn out, since the platen directly contacts the head.

❏

The wear rate of the cutter blades is different between the areas where paper passes and does not pass, which can result in a paper-cutting problem.

However, if the printer is new, you can change the paper width from narrow to wide.

1. When you want to set t he rol l p aper wid th fr om 61 mm to 70 mm { 2.4 to 2.76"}, break off the two claws on the spacer shown in the illustration below with your hands.

Claws

2. Open the paper roll cover.

3. Insert the label paper spacer so that the front edge goes through the notch; then push down the spacer so that the hook on the spacer and the shaft align.

Notch

Front edge

Shaft

Hook

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4. Push the label paper spacer until you feel it click onto the shaft. Check that the label paper spacer slides smoothly to the left and right.

5. Slide the labe l paper spacer to the appropriate width. You can use the ruler printed inside the printer, aligning the inside edge of the spacer with the desired measurement.

Screw

Ruler

6. Tighten the spacer with the screw included with the spacer. (See figure above.)

7. Set the NV memory for the desired paper width.

Attaching the Power Switch Cover

WARNING:

If an accident occurs when the power switch cover is attached, unplug the power supply cord from the outlet immediately. Continued usage may lead to fire or shock.

You can use the power switch cover to make sure the power switch is not accidentally pressed.

Peel off the paper on the back of the power switch cover, and attach it as shown in the illustration.

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For removal, use a sharp-edged object.

TM-L90 Service Manual

Power switch cover

If you want to turn on or off the power switch with the cover attached insert a sharp edged object into the hole in the power switch cover, and remove portion in the above illustration.

Setting the DIP Switches

Location of the DIP switches

A single set of DIP switches is located in the area shown below. To access the DIP switches, remove the DIP switch cover.

DIP switches

DIP switch cover

Note: About the DIP switch on the main circuit board

When disassembling and assembling the printer, you may notice a DIP switch on the main circuit board. This switch is used only at the factory. Always set this switch to OFF.

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DIP switch settings

For serial i n terface models

Table 6-2 DIP switch settings for serial interface models

Switch number Function ON OFF

1 Power switch function Disabled Enabled 2 Setting for serial communication

conditions 3 Handshake XON/XOFF DTR/DSR 4 Bit length 7 bits 8 bits 5 Parity check Yes No 6 Parity selec ti on Even Odd 7 Baud rate selection See the next table. 8

Table 6-3 Baud rate selection

Transmission speed Switch number [ bps ] 7 8

2400 ON ON 4800 OFF ON 9600 ON OFF 19200 OFF OFF

To be specified with DIP switches.

To be specified with NV memory.

bps: bits per second

Note: About the sett ing for seria l communication conditions.

When DIP switch 2 is “ON”, you can set for seri al communi cati on cond it ions by the DIP swit ch. In case of OFF, it doesn’t enables to set by the DIP switch, but by the memory switch. Then you need to run the Memory Switch Setting Mode.

For non-ser i al interface models

Table 6-4 DIP switch settings for non-serial interface models

Switch number Function ON OFF

1 Power switch function Di sabled Enabled 2 Reserved - Fixed to off 3 Reserved - Fixed to off 4 Reserved - Fixed to off 5 Reserved - Fixed to off

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Switch number Function ON OFF

6 Reserved - Fixed to off 7 Reserved - Fixed to off 8 Reserved - Fixed to off

TM-L90 Service Manual

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Connecting Cables

WARNING:

Make sure you use the EPSON PS-170 or PS-180 power supply. Using an incorr ect power supply may cause fire or electrical shock.

CAUTION:

When connecting or disconnecting the power supply from the printer, make sure the power supply is not plugged into an electrical outlet. Otherwise you may damage the power supply or the pri nter.

Note:

To remove the DC cable connector, make sure the power supply's power cord is unplugged; then grasp the connector at the arrow and pull it straight out.

Power source connector Interface connector

Drawer kick-out connect or

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TM-L90 Service Manual

Setting the NV Memory

The functions shown below are assigned to the memory system used with this printer.

NV memory

Memory switches

• MSW1

• MSW2

• MSW8

Serial communication

conditions

• Baud rate

• Data length

• Parity

• Flow control

• Select NV user memory capacity

• Select NV graphics memory capacity

• Select paper width

• Select number of division for head energizing

• Select print density

• Select paper type (mono or color)

• Select print speed

Customized values

Paper layout

Type of paper / size

Normally, you set the NV memory using the ESC/POS command. However, some functions can be set using either the Memory Switch Setting Mode or the Paper Layout Automatic Setting Mode on the printer itself, as described below.

Memory Switch Setting Mode

The functions listed below can be set using the Memory Switch Setting Mode.

Table 6-5 Setup items in the memory switch setting mode

Items Description

Autocutter Enables or disables the autocutter op erat io n Paper / Print dens ity • Selects paper type (mono or colo r)

Basic serial interface settings

Advanced interface settings

Interface res et signal Sets if the reset sign al on the interface co nn e ctor is used or not us ed Paper width Sets paper width

• Selects print density Sets the baud rate, data length, flow control, parity

Sets the receive buffer capacity, data proces sing for receivin g error, conditions for busy

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Follow the s teps below t o run the Mem ory Switch Se tting Mode.

1. Install a paper roll.

2. With the roll paper cover opened, turn the power on while pressing the FEED button. And

You need to hold down the paper FEED button continuously until the ERROR LED lights on; release the paper FEED button once when the ERROR LED light on.

3. Press the paper FEED button (located inside the printer) twice.

4. Close the roll paper cover. The printer prints the main menu and operation instructions.

5. Follow the instructions for further opera tion to set the memory switc hes.

6. Once the setting is finished, the printer initializes and enters the normal state.

Paper Layout Automatic Setting Mode

Follow the s teps below t o run the Paper Layout Automatic Setting Mode.

1. Install the paper roll you want to use.

2. With the roll paper cover opened, turn the power on while pressing the FEED button.

3. Press the FEED button again six times.

4. Close the roll paper cover. The printer runs the Paper Layout Automatic Setting Mode. During the mode, the printer checks the necessary information for the paper installed and stores it in the NV memory.

Memory Switches

MSW1

Table 6-6 Memory switch MSW1

Bit Functio n 0 (off) 1 (on)

1 Send power on notifica ti on No Yes 2 Capacity of the receive buffer 4KB 45B 3 Conditions for BUSY Receive buffer full or

offline

4 Data processing for receiving

error 5 Automatic li ne feed Disabled En abled 6 Reserved Fixed to off --7 Pin #6: selection of reset signal Not used Used 8 Pin #25: selection of reset signal Not used Used

Prints '?' Ignores

Receive buffer full

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MSW2

Table 6-7 Memory switch MSW2

Bit Functio n 0 (off) 1 (on)

1 Reserved --- Fixed to on 2 Autocutter op eration Disabled Enabled 3 Undefined --- --4 Undefined --- --5 Undefined --- --6 Undefined --- --7 Undefined --- --8 Undefined --- ---

MSW8

Table 6-8 Memory switch MSW8

Bit Functio n 0 (off) 1 (on)

1 Undefined --- --2 Undefined --- --3 Undefined --- --4 Undefined --- --5 Undefined --- --6 Feeding paper to the start

position during power on 7 Undefined --- --8 Select the type of error when

the roll paper cover is opened

while printing

Enabled Disabled

Generate an automatically recoverable error

TM-L90 Service Manual

Generate an error recoverable by ESC/ POS command

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Customized Values

Table 6-9 Customized values

Function Selection

Select NV user memory capacity

Select NV bit image memory capacity

Select pape r width 38 mm

Select number of division for head energizing

Select print density × 0.7, × 0.75, × 0.8, × 0.85, × 0.9, × 0.95, × 1.0,

Select paper type (mono or color)

Select print speed Print speed level 1

1KB 64KB 128KB 192KB

None 64KB 128KB 192KB 256KB 320KB 384KB

39 mm

•

80 mm (43 steps in increment of 1 mm, except for the size from 71 mm to 79 mm)

Undivided energizing Two-part energizing Three-part energizing Four-part energizing

× 1.05, × 1.1, × 1.15, × 1.2, × 1.25, × 1.3, × 1.35, × 1.4 Single color

Two colors

•

Print speed level 9

Serial Communication Conditions

Table 6-10 Serial communication conditions

Function Se lection

Baud rate 2400 bps, 4800 bps, 9600 bps, 19200 bps,

38400 bps, 57600 bps, 115200 bps

Parity None

Flow control DTR/DSR control

Data length 7 bits, 8 bits

Odd Even

XON/XOFF control

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Chapter 7

Handling

Safety Precautions

WARNING:

❏

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

❏

Only disassemble this product as de scribed 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.

TM-L90 Service Manual

❏

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

❏

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

❏

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

❏

Always supply power directly from a standard domestic power outlet.

❏

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

• Do not modify or attempt to repair the cord.

• Do not place any object on top of the cord.

• Avoid excessive bending, twisting, and pulling.

• Do not place cord near heating equipmen t.

• Check that the plug is clean before plugging it in.

• Be sure to push the prongs all the way in.

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CAUTION:

❏

Do not connect cables other than as described in this manual. Different connections may cause equipment damage and burning.

❏

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

❏

Do not use in locati ons subjec t to h igh humi dity o r dust l evels. E xcess ive humid ity an d dust may cause equipment damage, fire, or shock.

❏

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

❏

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

❏

Be aware that the thermal print head and its supporting parts become very hot. Be sure not to touch these parts. Touch ing them may cause burns.

Precautions on Handling the Printer

Observing the following operational precautions protects the unit against damage.

CAUTION:

❏

Do not turn off the printer while the autocutter is working. Doing so leaves the cut ter blade exposed, which prevents the roll paper cover from opening.

❏

Do not pull out pape r when the roll paper cover is closed.

❏

Except for a paper jam, do not turn the autocutter knob when the cutter cover is open. Turning it accidentally may expose the cutter blade, which prevents the r oll paper cover from opening.

❏

The heating element of the printer mechanism's thermal head and the driver IC are easily damaged. Nev er all ow these c omponen ts to com e into c ontact with metal or other hard objects.

❏

Never touch the printer mechanism's (thermal head's) heating elements with your hands. Doing so can contaminate the heating elements and affect proper operation.

❏

Do not open the roll paper cover during printing. The printer mechanism may fail.

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TM-L90 Service Manual

Precautions on Paper Handling

CAUTION:

❏

Thermal paper containing Na, K, or CL ions, etc., can adversely affect the heating elements of the thermal head. Be sure to use thermal paper that meets the paper specificati on s d esc ri b ed in Ap p e nd ix A, “Gen er a l Spec if ic at i o ns. ”

❏

Thermal paper starts to color at around 70°C {158°F}. Take care to protect unused and printed thermal paper against the effects of heat, light, and humidity, which can cause the paper to color and characters on the paper to fade.

❏

Take the roll paper out of the printer when you will not use the printer for a long time in an environment of high temperatures and humidity.

❏ When the printer i s not used for one week or more, it is recomended no t to leave the t hermal

paper between the platen and the print head.

Part Names

Power swit ch

Cover o pen lever

Control panel

Table 7-1 Part names and functions

Name Function

Roll paper cover Open to insert or remove roll paper. Cutter cover Remove when the roll paper cover does not open. Do not open

this normally. Power switch Turns on or off power. Cover open lever Used to open the roll paper cover. Control panel Includes LEDs for sh o win g th e printer status and a button for

feeding paper. See the next illustration for details.

Cutter cover

Roll paper cover

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LEDs and Button

Table 7-2 LEDs and button

Name Function

POWER LED Lights when the power is on, and is off when the power is off. ERROR LED Off when the printer is online, lights when the printer is offline, and

flashes when an error occurs. PAPER OUT LED Lights when roll pa pe r is ne arly out. FEED Button Feeds the roll paper.

Handling

Powering the unit ON or OFF

There are tw o methods to power this printer ON or OFF:

❏ Using the power switc h ❏ With the power switch disabled

Each method is used for the following purposes:

Table 7-3 Purpose of each method of power ON/OFF

Method Description

Power ON/OFF using the power switch

Power ON/OFF with th e power switch disabled

To power the printer ON or OFF using the po wer s wit ch

To power the printer ON or OFF using the power breaker where the printer is installed or using the switch on the power box or wall ou tlet where the printer is connected.

In this case, the program must execute the power off process using the DLE DC4 (fn=2) command before turning the printer power o ff.

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These methods can be selected by DIP switch 1.

Table 7-4 Setting of DIP switch 1

Method DIP switch 1

Power ON/OFF using the power switc h OFF Power ON/OFF with the power switch disabled ON

The explanations below show how to power the unit ON or OFF by each method.

TM-L90 Service Manual

Power ON/OFF me th od using the power swit ch

Power ON: Press the power switch. Power OFF: Hold down the power switch for more than 3 seconds.

Power ON/OFF method with disabling the power switch

Power ON: Turn ON the power breaker at the store where the printer is installed,

or turn ON the switch on the power box or wall outlet where the printer is connected.

Power OFF: 1. Execute the power off process using the DLE DC4 (fn=2)

command.

2. Make sure the POWER LED starts flashing.

3. Turn off the power breaker or the switch on the power box or wall outlet.

Rev.B Handling 7-5

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Confidential

Loading the paper roll

CAUTION:

❏

The manual cutt er b lade is sh ar p. Do not tou c h it wi th your ha nds whe n m oun ti ng o r replacing roll paper, because you can be injured.

❏

Be aware that the thermal print head and its supporting parts become very hot. Be sure not to touch these parts. Touch ing them may cause burns.

Note:

Be sure to use paper rolls that meet the specifications. Do not use paper rolls that have the paper glued to the core, because the printer cannot detect the paper end correctly.

1. Make sure the printer is not receiving data; otherwise, it may be lost. Open the paper roll cover by pressing the cover-open button.

2. Load the roll paper inside the printer in the correct direction.

H orizontal instal l at i on

Vertical installati on

7-6 Handling Rev.B

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Confidential

3. Pull out a small amount of roll paper.

4. Then close the paper roll cover.

TM-L90 Service Manual

Horizontal installation

5. Tear off the paper as shown.

Vertical installat ion

Removing the roll paper

Open the roll paper cover, and remove the used paper roll core if there is one.

Rev.B Handling 7-7