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Confidential

Service manualTM-L90 series

English401392002

Rev.C

Issued date , ,

Issued by

EPSON

TM-L90 Service ManualConfidential

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 “power supply unit type in the ”specifications 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.

Add the “before servicing“ and “diagnosing failures“.

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

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


2-5 Add the explanation to the ”paper layout error” that is the automatically recoverable errors of the ”Troubleshooting using the ERROR LED”


2-6 Add the below explanation to ”Autocutter error” that is the automatically 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 circuit 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“ on page appendix F-6.


2-8 Add the “test points on the printer mechanism“.

Reason for change:Because of changing chapter 2.

3-17 Add the “inslating tape“ to fix ferrite core.

3-37 Add two spacers on the illustration.

i

Confidential

4-1 Add the paper types for original and specified paper.


6-10 Add the note about the setting for serial communication conditions.

6-13 Changed the explanation for the ”Capacity of the receive buffer” that is the function for the”memory switch1-2”old: Capacity of the receive buffer “large“/OFF.new: Capacity of the receive buffer “4KB“/OFF.old: Capacity of the receive buffer “small“/ON.new: Capacity of the receive buffer “45B“/ON.


Rev. B 6-15 Add the felow explanation for “select paper withs”. 43 steps in increment of 1 mm, except for the size from 71 mm to 79 mm


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


Appendix A Add the explanation for the paper types for original and specified paper . (To ensure print quality, be sure to use the specified paper.) old: Label papernew: Lavel paper (with black mark) Lavel paper (without black mark)


Appendix D The parts below were newly provided. spacer Sheet, holder guide, C Sheet, holder guide, D


ii

iii


Rev. C <Discontinued parts>Sheet, holder guide, (Ref# 176)Sheet, holder guide, C (Ref# 182)Sheet, holder guide, D (Ref# 183

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

3-25,52 Added the explanation about the method of installing the head (new type)as “Important Note About Installing Thermal Print Head“.

Appendix D-10

The part “Spacer Thermal Head“ on ParsList and Exploded Diagram is deleted.


Spacer Thermal Head

Before change After change

CONFIDENTIALITY AGREEMENT
BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT. PLEASE RETURN THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE TO THESE TERMS.

This document contains confidential, proprietary information of Seiko Epson Corporation or its affiliates. You must keep such information confidential. If the user is a business entity or organization, you must limit disclosure to those of your employees, agents, and contractors who have a need to know and who are also bound by obligations of confidentiality.

On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson’s request, you must stop using the confidential information. You must then return or destroy the information, as directed by Seiko Epson.

If a court, arbitrator, government agency, or the like orders you to disclose any confidential information, you must immediately notify Seiko Epson. You agree to give Seiko Epson reasonable cooperation and assistance in the negotiation.

You may use confidential information only for the purpose of operating or servicing the products to which the document relates, unless you obtain the prior written consent of Seiko Epson for some other use.

Seiko Epson warrants that it has the right to disclose the confidential information. SEIKO EPSON MAKES NO OTHER WARRANTIES CONCERNING THE CONFIDENTIAL INFORMATION OR ANY OTHER INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY WARRANTY OF TITLE OR NON-INFRINGEMENT. Seiko Epson has no liability for loss or damage arising from or relating to your use of or reliance on the information in the document.

You may not reproduce, store, or transmit the confidential information in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of Seiko Epson.

Your obligations under this Agreement are in addition to any other legal obligations. Seiko Epson does not waive any right under this Agreement by failing to exercise it. The laws of Japan apply to this Agreement.

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

means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation.

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

While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no responsibility for errors or omissions.

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

Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.

Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options or any consumable products other than those designated as Original EPSON Products or EPSON Approved Products by Seiko Epson Corporation.

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

Rev.B i

Confidential
Contents
For Safe Repair and Maintenance Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vKey to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vSafety Precautions on Maintenance/Repair/Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Modular Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viAbout this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

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

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

Chapter 1 Product Overview

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

Chapter 2 Troubleshooting Guide

Preparations for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2Diagnosing Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3How to Use the Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Print Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Troubleshooting Using the ERROR LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5Test Points on the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

Chapter 3 Disassembly and Assembly

Notes for Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1How to Read this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Structure of this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Shortest Route for Disassembly of Major Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Representation of Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Replacing the Thermal Print Head Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Disassembly and Assembly of the TM-L90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

First Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Disassembly and Assembly of the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

First Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15Second Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35Third 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Recommended Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Cleaning the Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2Cleaning the Thermal Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Chapter 6 Installation

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

Vertical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Horizontal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

ii Rev.B

Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Setting the Installation Position for the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3Adjusting the Detecting Point of the Roll Paper Near-End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4Setting the Paper Roll Cutting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5Setting the Paper Roll Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7Attaching the Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8Setting the DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Location of the DIP switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9DIP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Connecting Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12Setting the NV Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Memory Switch Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13Paper Layout Automatic Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14Customized Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16Serial Communication Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

Chapter 7 Handling

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1Precautions on Handling the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2Precautions on Paper Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3Part Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

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

Powering the unit ON or OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4Loading the paper roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6Removing the roll paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

Appendix A General Specifications

Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2Autocutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Paper Roll Supply Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6Dimensions and Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7Drawer Kick-out Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8Buttons and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

Power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8Panel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

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

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

Appendix B Overview of the Mechanisms

Cover Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2Print/Paper Feed Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Thermal Print Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4Paper Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

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

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Autocutter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Full cut and partial cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7Manual cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

Appendix C Tools

Appendix D Parts List

Alphanumeric List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-3Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6Overall Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Case Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Appendix E Lubrication Points Diagram

Appendix F Overview of Electric Circuits

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3Switch Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6Sub Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6Interface Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6

Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7Test points on the main circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7Test Point Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8

Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9Switch Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-11Sub Circuit Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-11

Circuit Board Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1Main Circuit Board (1 of 3) (Drawing Number 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1Main Circuit Board (2 of 3) (Drawing Number 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2Main Circuit Board (3 of 3) (Drawing Number 20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3

iv Rev.B

For Safe Repair and Maintenance Work
Key to Symbols

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

WARNING:You must follow warnings carefully to avoid serious bodily injury.

CAUTION:Observe cautions to avoid minor injury to yourself, damage to your equipment, or loss of data.

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

Safety Precautions on Maintenance/Repair/Inspection

WARNING: Be sure to use the designated type of fuse for the circuit board. Use of a different

type may result in fire.

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

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

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

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

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

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

Rev.B v

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CAUTION: When mounting or replacing the paper roll, be careful 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 printer power off before beginning the maintenance, repair, 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.

vi Rev.B

About this Manual
Aim of the Manual

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

Contents of the Manual

The configuration of the manual is as follows.

Chapter 1 Product Overview Describes features and configurations of the unit.

Chapter 2 Troubleshooting Guide Explains troubleshooting (to pinpoint the problem area by the symptom).

Chapter 3 Disassembly and Assembly Describes disassembly and assembly of the unit.

Chapter 4 Adjustment and Settings Provides information about adjustment.

Chapter 5 Maintenance, Inspection, Cleaning, and Lubrication

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

Chapter 6 Installation Provides information about installation.

Chapter 7 Handling Gives information about handling.

Appendix A Features and General Specifications

Describes major specifications of the unit.

Appendix B Overview of the Mechanisms

Describes major mechanisms of the unit.

Appendix C Tools Provides information about tools required for maintenance and repair.

Appendix D Parts list Lists service parts and gives an exploded view of the unit.

Appendix E Lubrication Points Diagram Shows a lubrication drawing of the unit.

Appendix F Overview of Electric Circuits

Provides electric circuit diagrams and explanations about major elements

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Related Documentation
Documents related to the TM-L90 are listed below.

Documentation

*1)TM Service & Support utility is to use for repairing the TM printer. The utility has the function below.

• It uses for repair of the TM-L90 and adjustment.

The repairment means to change the print head, autocutter, main circuit board unit etc.

• Communication test, self-test, and test print can be performed.

• Setting for the memory switch or customized value can be performed.

• The error history information saved on the memory that a printer has when a printer

is repaired can be reffered to.

• It can check that sensors are operating by using the demand of real-time status.

• Sequence peculiar to a printer, such as a paper layout setting, can be performed.

• The newest firmware released can be written in memeory that a printer has.

• It is released and multilingual fonts can be written in the memory that a printer has

corresponding to multilingual.

• If a repair wizard is used, it can be made to complete by operating a series of work which

is needed for part exchange according to a screen.

If you have any questions, please contact SD-Technical Support.

Mail Address: [email protected]

Related Documents

Name of document Description

TM Service & Support Utility User’s Manual *1)

This manual is written for the person that repairs or adjusts of the TM-L90.

TM-L90 User’s Guide This manual is written for the operator of the TM-L90.

TM-L90 Developer’s Guide. This manual is written for users who are designing TM-L90.

viii Rev.B


Chapter 1Product Overview

The TM-L90 is a line-thermal printer for POS systems that can print on roll paper or a ticket.

Specifications and Configurations

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

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

dpi: dots per 25.4 mm (dots per inch)

Table 1-1 Specifications and configurations

Features Selection Description

Interface type UB-S01 (RS-232)UB-P02II (IEEE1284 (bidirectional parallel))etc.

Use an EPSON-approved interface board

Font type AlphanumericJapaneseSimplified ChineseTraditional ChineseThaiKorean

Use the EPSON-approved main circuit board

Autocutter setting Partial cutFull cut

For details about how to set partial or full cut, see Chapter 6, “Installation.”

Paper width selection 38/60/80 mm, etc. For details about how to set the paper width, see Chapter 6, “Installation.”

Power supply unit type

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

--

TM-L90 external view

Rev.B Product Overview 1-1


Chapter 2Troubleshooting Guide

Preparations for Troubleshooting

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

Roll paper cover does not open (cover open lever does not 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 direction of an arrow.

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

3. Lift up the roll paper cover.

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

Triangle

Knob

Cutter cover

Cutout

Cutout

Main case assembly

mark

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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.

1. 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.

2-2 Troubleshooting Guide Rev.B


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 page F-6.) 3. Unplug the printer. Then unplug each motor or head or FFC’s

connector from the main board one by one; plug the printer back in, and power it on. This will let you know if any motor 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 page 3-20.)

There are missing dots in the print.

ThermallPrintingLabel printing

1. Clean the thermal print head assembly. (See page 5-2.)2. Replace the thermal print head assembly. (See page 3-4.)3. Replace the main circuit board unit. (See page 3-13.)4. Replace the Head FFC. (See page 3-13.)

The print is thin. Receipt PrintingLabel printing

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

Unevenness occurs in the concentration of the print.

Receipt PrintingLabel printing

1. Clean the thermal print head assembly. (See page 5-2.)2. Replace the thermal print head assembly. (See page 3-4.)3. Replace the main circuit board unit. (See page 3-13.)

Paper feed failure. Thermal PrintingLabel Printing

1. Check that the roll paper is properly loaded. (See page 7-6.)2. Replace the main circuit board unit. (See page 3-13.)3. Replace the receipt paper feed motor. (See page 3-34.)

Drawer kick operation failure. 1. Replace the main circuit board unit. (See page 3-13.)2. Replace the Sub circuit board assembly. (See page 3-20.)

Missing characters/misprinted characters/font breakdown.

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.). Also you can set 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 flashing, see page 2-5.)

Close the roll paper cover secure.


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How to Use the Self-test
There are two types of self-tests.

Print tests

Print Tests

Testing the Thermal PrinterExecute this test using the following procedure.

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

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.

The printer will print the status of the printer settings. Afterward, the autocutter will cut the roll paper and the PAPER OUT LED will flash.

2 Press the FEED button after the PAPER OUT LED flashes.

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



Troubleshooting Using the ERROR LED

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

Automatically recoverable errors

Automatically recoverable errors are not abnormalities.

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.”

Table 2-3 Automatically recoverable errors

ErrorERROR LED Blinking Pattern Description Recovery

Print head temperature errorApprox. 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.

Replace the autocutter unit.Recovers automatically when the roll paper cover is closed.

Paper layout error Label paper or the black mark is not detected, or the paper layout of the paper installed in the printer and the setting of the paper layout defined by the GS ( E command do not match.

Recovers automatically when prpper label paper or the black mark installed in the printer.


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Recoverable errors
Table 2-4 Recoverable errors

ErrorERROR LED Blinking Pattern Description Remedy

Autocutter error The autocutter does not work correctly.

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 the autocutter blade (See the section, “Cleaning.“in Chapter 5 for details on how to remove these).

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 circuit 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 autocutter unit.

Paper layout error Label paper or the black mark is not detected, or the paper layout of the paper installed in the printer and the setting of the paper layout defined by the GS ( E command do not match.

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 threshold value setting 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 command match.

Check for paper dust or foreign particles attached to the LED holder assembly and the black mark paper detector circuit board assembly.

Replace the LED holder assembly. Replace the black mark paper

detector circuit board assembly.

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

Printing is not performed correctly due to a cover open

Close the roll paper cover, turn it off, and then turn it on again.

Approx. 5.12sec



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

ErrorERROR LED Blinking Pattern

Approx. 320 msec Description Remedy

R/W error in memory or gate array After R/W checking, the printer does not work correctly.

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

High voltage error The power supply voltage is extremely high.

Replace the power supply unit. Replace the main circuit board

unit. (See page 3-13.)

Low voltage error The power supply voltage is extremely low.

Replace the power supply unit. Replace the main circuit board

unit. (See page 3-13.)

CPU execution error The CPU executes an incorrect address.


Interface circuit board error Interface circuit board does not work correctly.

Check installation status of the interface circuit board.

Replace the interface circuit board. (See page 3-11.)


Drive circuit error One of the following was detected.1. Print head thermistor.2. Level drive motor. assembly.

Check installation status of the interface circuit board.

Replace the head FFC. (See page 3-13.)

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


Replace the interface circuit board. (See page 3-11.)

Approx. 5.12 sec


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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 sub-assembly

DC brush motor Autocutter drive Remove the cable connector connected to CN8 on the main circuit board. Test between + and -.

There is continuity. (Aproxinately38 ± 3.8Ω)

Paper feed motor

4-phase stepping motor

Receipt paper feed

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

Approximately 2.6 Ω (per phase)

A

ROTOR

B

A B



Chapter 3Disassembly 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 printer if you work while the power supply is still attached.

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

Do not perform any work that is not described in this chapter. Doing so may result in injury or damage to the printer.

Do not touch the FPC or FFC pins.

Hold circuit boards only by their edges.

Rev.C Disassembly and Assembly 3-1

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How to Read this Chapter
Structure of this Chapter

This chapter consists of the items listed in Table 3-1. Reading from the top item to the bottom 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

Cutter cover

Connector cover

I/F circuit board unit

Main assembly case

Main circuit board unit

Disassembly and assembly of the printer mechanism

Cable wiring

Roll paper cover unit Roll paper cover unit Platen holder

Switch circuit board assembly

Sub circuit board assembly

Autocutter unit Autocutter unit

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


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.

Representation of Small Parts

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

Cutter cover

Connector cover


I/F circuit board unitMain assembly

case



Auto cutter unit N.E. detector assembly

Paper feed motor

Sub circuit board assembly

Cover detector assembly

Label paperholder

Start


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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 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 thermal print head assembly. Touching this 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:

Cutter cover

Roll paper cover

Main case assembly


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.

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

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.

Dowel

S4

Autocutter unit


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5. While holding the two head holder springs so they do not fly out, pull out the spring holder
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.

6. Lift up the thermal print head assembly and remove the head FFC from the thermal 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.

Spring holder plate

Head holder springs


Spring holder plate

Head holder spring


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.

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.

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.

Insulating tape

G-45

G-45

Head holder springs

Spring holder plate


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9. Set the autocutter 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.

10. 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.

11. Install the cutter cover.

12. Close the roll paper cover.

Dowel



Disassembly and Assembly of the TM-L90

First Level

Cutter Cover


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

Install in the reverse sequence of removal.

Main case assembly

Cutter cover

Roll paper cover


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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



I/F Circuit Board Unit

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

2. Remove the I/F circuit board unit.


S6

I/F circuit board unit


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

2. Remove the main case assembly.

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


Main case assemblyS3

S5



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.

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. Bend it in the same way as the one that was installed into the printer. When installing, hook the bent portion against the circuit board frame.

8. Remove the main circuit board unit.

Right side viewFront view

Cutter lead wire

Cutter lead wire

Insulating tape


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S6S6

S6

Bottom plate



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 detector lead wire from the hook on the frame L assembly. When installing, 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.


NE detector lead wireHook

Hook

Hook

Lead wire of the

Lead wire of the LED holder assembly

paper feed motor


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Roll Paper Cover Unit
1. Release the two tabs on the label paper guide from the roll paper cover unit.

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

Tabs

Label paper guide

Insulating tape

Lead wire


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

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.

Ground wire

S1

Ferrite core

Lead wire (make one loop)

Connector

Insulating tape


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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.

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

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


Roll paper cover unit

E2Cover rotation shafts

E2

Hinge cover

Roll paper cover unit



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 panel holder

Cover detector lead wire Switch circuit board FFC

S2


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Sub Circuit Board Assembly

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


S6Sub circuit board assembly



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.

2. Remove the two S4 screws.

3. Remove the autocutter unit.

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

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.

Dowel

S4

Autocutter unit Frame assembly


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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 autocutter 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.

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.

Dowel



Thermal Print Head

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 thermal print head assembly. Touching this 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. While holding the two head holder springs so they do not fly out, pull out the spring holder 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.

Spring holder plate

Head holder springs


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2. Remove the two head holder springs from the spring holder panel by rotating them.
3. Lift up the thermal print head assembly and remove the head FFC from the thermal 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.


Head holder springs

Spring holder plate

Head FFC


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.

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

3. Pass the head FFC through as indicated with the arrow in the drawing on the previous 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.

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.

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.)

G-45

G-45

Insulating tape

Head holder springs

Spring holder plate


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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

S1

DIP switch cover

Feed

S1S2

sheet



Label Paper Guide

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


Label paper holder

Label paper guide


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Reduction Gears
1. Remove one E-ring (E2).

2. Remove reduction gear C.

3. Remove reduction gear D.


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).

Reduction gear CE2

Reduction gear D


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.

frame

Frame RCircuit

Frame L assemblyframe

Frame R

Center

board

Front

frame


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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.


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.

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

3. Tighten the S1 screw.

Frame L assembly

Frame R

Label paper holder

S1

Front frameCenter frame



Circuit Board Frame

1. Remove four S4 screws.

2. Remove the circuit board frame.


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.

Circuit board frame

S4

S4

S4

Frame L assembly

Frame R

Insulating tape


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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.


1. Affix the insulating tape on the cover detector 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 .

Center frame

Frame R

Frame strengthening plate RS4

S4

Cover detector assembly

Switch screwFrame L assembly

Insulating tape



Front Frame

1. Remove one S4 screw.

2. Remove frame strengthening plate L.

3. Remove the front frame.


Frame strengthening plate L

S4

Front frame


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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.


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 holes in the three paper feed 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 the specified torque. If you overtighten these nuts, the screws on the paper feed motor become loose when you loosen the nuts the next time.

Paper feed motor

N1

Paper feed motor damper

Frame L assembly

Motor ground plate

Paper feed motor damperSpacer

SpacerPaper feed motor

Spacer

W1N1

W1N1damper



Second Level

Roll Paper Cover Unit

1. Remove one E2 type E retaining ring, and slide the lever shaft to remove the lever button.

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

Lever shaft

Lever button

E2

Bend

Pass through Hook with the clampthe hole


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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 button.

E2

S1

Feed spacer

FEED button

Roll paper cover

Double-sided adhesive tape side


6. Peel off spacer B.
When assembling, affix the spacer as shown below.

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

Spacer B

Spacer B

Mini-clamp


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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

Glossy surface

Glossy surface

Hinge spacer



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.

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 screw

Manual

Paper cutter cover Manual cutter

S9

Cutter motor sub assembly

Switch

Micro switch

screw

cutter screw

Hook Cutter driving

Cutter motor gear

Cutter frame assembly

<Inner side>

assembly

gear


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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 hole in the paper cutter cover assembly.

4. Hold the lead wire of the micro switch to the side of the cutter motor and secure it with the hook, together with the lead wire from 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 movable 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. Lubricate halfway around the cutter motor gear, located on the paper cutter cover assembly, and the reduction A/C gear, with G-36.

Manual cutter

Manual

S9

Cutter driving gear

Reduction

Cutter

Center of the

Cutter worm motor gear

A/C gear

gear and the paper cutter cover assembly

gear

contact area between the cutter worm

Triangle

Label

Long hole in the

Movable blade

Round

cutter

screws

Manual cutter

Paper cutter cover

Cutter motor sub assembly

Cutter frame assembly

mark

movable blade

face

assembly

hole

screw


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.

CAUTION:Do not pinch the lead wire between the paper cutter cover 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.


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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.


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

2. Install the LED holder assembly. Then, pass the lead wire through first, and then insert the LED holder assembly into the label paper holder.

Label paper holder

Cover leaf spring

LED holder assembly

Lead wire



NE Detector Assembly

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

2. Remove one E1 type 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.


8. Remove the micro switch.

NE detector adjustment screwNE detector

Label paper holder

N1

S7

E1

Micro switch

NE detector holder

NE detector lead wire

lever


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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.)

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 temporarily, 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.

Insulating tape

NE detector assembly

NE detector lead wire



Auxiliary Holder Plate and Side Plate Guide Shaft


2. Disengage both projections located in the lower part of the auxiliary 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.

S10

Auxiliary holder plate

Paper holding

Paper holding rollers



E1

Side plate

E1

Label paper holder

rollers

guide shaft


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After you have installed the paper holding rollers, lubricate with G-45 at the 16 points shown below.

G-45

G-45

G-45

G-45

G-45

G-45 G-45

G-45 G-45

G-45

<Zoom up>



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.

2. Remove the two tension plate springs.

Fixed blade

Tension plate spring

Tension plate spring


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3. Pull out the lever shaft and remove one E2 type E retaining ring.
4. Remove the cover open lever.

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

Lever shaft

E2

Cover open lever

Hooks


6. Remove two S1 screws, and remove the BM detector holder.
When you assemble the BM detector holder, make sure the shield plate fits into place as shown below.

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

BM detector holder

S1

S1

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

Hole


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8. Remove one S1 screw; then, remove the shield plate.
9. Remove one S1 screw, and remove the BM paper detector circuit board assembly.

Shield plateS1

S1BM paper detector circuit board assembly


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.

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.


Fixed blade holder spring

E2

Paper feed roller shaft holder

Platen holder

E2

Platen assembly


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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 plastic 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



Chapter 4Adjustment and Settings

Threshold Value Setting for Detectors

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

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 execute the setting.

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

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.


5. The printer performs the setting. Once the setting value is printed on the roll paper, the setting is finished. (The printer power may be turned off automatically, depending on the DIP switch setting.)

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

Items Requiring Setting

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

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))

Rev.B Adjustment and Settings 4-1

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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

4-2 Adjustment and Settings Rev.B


Chapter 5Maintenance, 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.

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 5-1 Lubricants

Type Name

Grease G-15

G-36

G-45

Table 5-2 Recommended cleaning

Checkpoints Cleaning method

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

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

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

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

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

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

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

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

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

Wipe off with dry cloth or cotton swab.

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

Clean thoroughly using a small vacuum cleaner for computer equipment.

Rev.B Maintenance, Inspection, Lubrication, and Cleaning 5-1

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Cleaning the Case
Use a dry cloth or lightly dampened cloth to clean the case. Disconnect the power cord from the wall outlet before doing this.

Avoid using alcohol, benzene, thinner, trichloroethylene, or ketone-based substances to remove dirt or foreign matter from the printer, because these substances can affect or damage plastic and rubber parts.

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 before 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.

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

Radiation plate

Head chip

Driver IC

Connector

5-2 Maintenance, Inspection, Lubrication, and Cleaning Rev.B


Chapter 6Installation

Installation Precautions

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

This printer can be installed vertically, horizontally, or mounted on the wall. If you change the installation position, you also need to set the installation position of the roll paper 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.

Rev.B Installation 6-1

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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.

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.

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 double-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.

Switch panel labell

paper outlet guide

paper outlet guide

paper outlet tape

6-2 Installation Rev.B


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

This printer allows you to change the installation position for the roll paper near-end detector using the following procedure. Set the detector based on whether your printer is installed vertically or horizontally.

1. Loosen the detector adjustment screw with a coin or similar tool. Turn the screw at least 3 or 4 times.

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

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

4. Secure the detector adjustment screw.

5. Make sure the detector lever moves smoothly.

Hole for vertical installationor wall mount

Hole for horizontalinstallation

tab

Detector adjuat screw

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.

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 variations, depending on the printer.

4. Tighten the detector adjustment screw.

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

6. Replace the paper roll.

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”

Detector Tab

#2 setting

#1 setting

Vertical installation or wall mounting

Horizontal installation

adjustmentscrew



Setting the Paper Roll Cutting Method

You can choose between partial cut and full cut by adjusting 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 change the cutting method from partial 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 can change 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.


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


Roll paper cover

S4Cutter cover

Autocutter

Main assembly case

unit


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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.

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 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.

6. Install the cutter cover.


Dowel



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 the roll paper width from 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.

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.

Claws

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 label 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.

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.

Ruler

Screw


For removal, use a sharp-edged object.
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.

Note: About the DIP switch on the main circuit boardWhen 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.

Power switch cover

DIP switches

DIP switch cover


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DIP switch settings
For serial interface models

bps: bits per second

Note: About the setting for serial communication conditions.

When DIP switch 2 is “ON”, you can set for serial communication conditions by the DIP switch. 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-serial interface models

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

To be specified with DIP switches.

To be specified with NV memory.

3 Handshake XON/XOFF DTR/DSR

4 Bit length 7 bits 8 bits

5 Parity check Yes No

6 Parity selection 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


1 Power switch function Disabled Enabled

2 Reserved - Fixed to off





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Connecting Cables
WARNING:Make sure you use the EPSON PS-170 or PS-180 power supply. Using an incorrect 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 printer.

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.

Drawer kick-out connector

Power source connector Interface connector



Setting the NV Memory

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

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 operation

Paper / Print density • Selects paper type (mono or color)• Selects print density

Basic serial interface settings

Sets the baud rate, data length, flow control, parity

Advanced interface settings

Sets the receive buffer capacity, data processing for receiving error, conditions for busy

Interface reset signal Sets if the reset signal on the interface connector is used or not used

Paper width Sets paper width

NV memoryCustomized values

Serial communication conditions

• Baud rate• Data length• Parity• Flow control

Memory switches

• MSW1• MSW2• MSW8

• 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

Paper layout

Type of paper / size


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Follow the steps below to run the Memory Switch Setting 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 operation to set the memory switches.

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

Paper Layout Automatic Setting Mode

Follow the steps below to 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 Function 0 (off) 1 (on)

1 Send power on notification No Yes

2 Capacity of the receive buffer 4KB 45B

3 Conditions for BUSY Receive buffer full or offline

Receive buffer full

4 Data processing for receiving error

Prints '?' Ignores

5 Automatic line feed Disabled Enabled

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



MSW2


MSW8



1 Reserved --- Fixed to on

2 Autocutter operation Disabled Enabled

3 Undefined --- ---

4 Undefined --- ---

5 Undefined --- ---

6 Undefined --- ---

7 Undefined --- ---

8 Undefined --- ---


1 Undefined --- ---

2 Undefined --- ---

3 Undefined --- ---

4 Undefined --- ---

5 Undefined --- ---

6 Feeding paper to the start position during power on

Enabled Disabled

7 Undefined --- ---

8 Select the type of error when the roll paper cover is opened while printing

Generate an automatically recoverable error

Generate an error recoverable by ESC/POS command


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Customized Values
Table 6-9 Customized values

Serial Communication Conditions

Table 6-10 Serial communication conditions

Function Selection

Select NV user memory capacity

1KB 64KB 128KB 192KB

Select NV bit image memory capacity

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

Select paper width 38 mm39 mm • • •80 mm (43 steps in increment of 1 mm, except for the size from 71 mm to 79 mm)

Select number of division for head energizing

Undivided energizingTwo-part energizingThree-part energizingFour-part energizing

Select print density × 0.7, × 0.75, × 0.8, × 0.85, × 0.9, × 0.95, × 1.0,× 1.05, × 1.1, × 1.15, × 1.2, × 1.25, × 1.3, × 1.35, × 1.4

Select paper type (mono or color)

Single colorTwo colors

Select print speed Print speed level 1 • • •Print speed level 9

Function Selection

Baud rate 2400 bps, 4800 bps, 9600 bps, 19200 bps,38400 bps, 57600 bps, 115200 bps

Parity NoneOddEven

Flow control DTR/DSR controlXON/XOFF control

Data length 7 bits, 8 bits



Chapter 7Handling

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 unplug the equipment.

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

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

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

Do not allow foreign objects to fall into the equipment. Penetration by foreign 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 equipment.

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

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

Rev.B Handling 7-1

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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 locations subject to high humidity or dust levels. Excessive humidity and dust may cause equipment damage, fire, or shock.

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

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

Be aware that the thermal print head and its supporting parts become very hot. Be sure not to touch these parts. Touching 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 cutter

blade exposed, which prevents the roll paper cover from opening.

Do not pull out paper 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 roll paper cover from opening.

The heating element of the printer mechanism's thermal head and the driver IC are easily damaged. Never allow these components to come into contact 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.

7-2 Handling Rev.B


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 specifications described in Appendix A, “General Specifications.”

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 is not used for one week or more, it is recomended not to leave the thermal paper between the platen and the print head.

Part Names

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 showing the printer status and a button for feeding paper. See the next illustration for details.

Cutter cover Power switch

Roll paper coverControl panel

Cover open lever

Rev.B Handling 7-3

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LEDs and Button
Handling

Powering the unit ON or OFF

There are two methods to power this printer ON or OFF:

Using the power switch

With the power switch disabled

Each method is used for the following purposes:

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 paper is nearly out.

FEED Button Feeds the roll paper.

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

Method Description

Power ON/OFF using the power switch

To power the printer ON or OFF using the power switch

Power ON/OFF with the power switch disabled

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 outlet 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 off.

7-4 Handling Rev.B


These methods can be selected by DIP switch 1.

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

Power ON/OFF method using the power switch

Power ON/OFF method with disabling the power switch

Table 7-4 Setting of DIP switch 1

Method DIP switch 1

Power ON/OFF using the power switch OFF

Power ON/OFF with the power switch disabled ON

Power ON: Press the power switch.

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

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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Loading the paper roll
CAUTION: The manual cutter blade is sharp. Do not touch it with your hands when mounting or

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. Touching 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.

Horizontal installation Vertical installation

7-6 Handling Rev.B


3. Pull out a small amount of roll paper.

4. Then close the paper roll cover.

5. Tear off the paper as shown.

Removing the roll paper

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

Horizontal installation Vertical installation

Rev.B Handling 7-7


Appendix AGeneral Specifications

Printing Specifications

Paper Specifications

Printing method: Thermal line printing

Dot density: 203 dpi × 203 dpi [dpi: dots per 25.4 mm (dots per inch)]

Paper type: Specified thermal roll paper

The following paper can be used:• Receipt paper (without black mark)• Receipt paper (with black mark)• Label paper (without black mark)• Label paper (with black mark)Refer to page 6-13 “Paper Layout Automatic setting mode“

Form: Paper roll

Paper width: 79.5 ± 0.5 mm 3.13 ± 0.02" (for 80 mm 3.15" paper width)59.5 ± 0.5 mm 2.34 ± 0.02" (for 60 mm 2.36" paper width)37.5 ± 0.5 mm 1.48 ± 0.02" (for 38 mm 1.5" paper width)

Rev.B General Specifications Appendix A-1

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Paper Specifications
Note:To ensure the print quality, be sure to use the specified paper.

Specified roll paper:

Roll WidthOriginal paper80mm 3.15" 60 mm 2.36" 38mm 1.5"

Monochrome thermalroll paper

ENTPD080090 --- --- TF60KS-E

Monochrome thermalroll paper (thickness type)

ENTPE080090 --- --- TF11KS-ET

Two-color thermal roll paper

ENTPC080090 --- --- PD750R

Label stock Length of label

Label Width

80 mm 3.15" 60 mm 2.36" 38mm 1.5" ---

Monocrome label paper stock

25 mm (1") ENTLA080090025

ENTLA060090025

ENTLA038090025

---

51 mm (2") ENTLA080090051

ENTLA060090051

--- ---

76 mm (3") ENTLA080090076

ENTLA060090076

--- ---

102 mm (4") ENTLA080090102

ENTLA060090102

--- ---

Two-color label paper stock

25 mm (1") ENTLA080090025

ENTLA060090025

ENTLA038090025

---

51 mm (2") ENTLA080090051

ENTLA060090051

--- ---

76 mm (3") ENTLA080090076

ENTLA060090076

--- ---

102 mm (4") ENTLA080090102

ENTLA060090102

--- ---

Appendix A-2 General Specifications Rev.B


Specified original paper: The following original paper types can be used.

Monochrome thermal paperTF60KS-E (Paper thickness 75 µm) (Nippon Paper Industries Co., Ltd.) TF11KS-ET (Paper thickness 145 µm) (Nippon Paper Industries Co., Ltd.)TF50KS-E (Paper thickness 65 µm)(Nippon Paper Industries Co., Ltd.)PD160R (Paper thickness 75 µm) (Oji paper Mfg. Co., Ltd.)P350 (Paper thickness 62 µm) (Kanzaki Specialty Paper (USA))KF50 (Paper thickness 62 µm) ( KANZAN Spezialpapiere GmbH (Germany))

Two-color thermal paperPD750R (Paper thickness 75 µm) (Oji paper Mfg. Co., Ltd.)

Paper roll size: Roll diameter: Maximum 90 mm 3.54"Take-up paper roll width: 80, 60, 38 mm 3.15, 2.36, 1.5" with +0.5/-1.0 mm +0.02/-0.04" of tolerance

Paper roll core: Inside diameter: 25.4 mm 1"Out side diameter: 31.4 mm 1.24"

Paper must not be pasted to the paper roll core.


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Autocutter
Either of the following settings can be applied.

Note: Once the printer is used, do not change the cutting method from partial cut to full cut, since the wear

rate on the blades differs between the areas where the paper passes and where the paper does not, which can result in a paper-cutting problem. However, if the printer is new, you can change the cutting method from partial cut to full cut.

If the printer is installed horizontally and the full cut is chosen, attach the paper outlet guide. (Refer to Chapter 6.) If it is not attached, the cut paper falls inside the paper path, which can result in double-cutting, a paper jam, or cutter error.

Table A-1 Autocutter settings

Setting Description

Partial cut (cutting with one point in left edge left uncut)

Set by changing the autocutter unit position.

Full cut (completely cut)



Paper Roll Supply Device

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 the follows.

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

The wear rate on the cutter blades differs between the areas where the paper passes and does not, which can result in paper-cutting problems.

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

Supply method: Drop-in paper roll

Near-end detector

Detection method: Micro switch

Paper roll core diameter:

Inside: 25.4 mm 1", Outside: 31.4 mm 1.24"

Near-end adjustment: Adjusting screwFixed position #1 (diameter: approximately 36 mm 1.42"), #2 (diameter: approximately 41 mm 1.61")

Paper width selection: 80 mm 3.15" (default setting)38 mm or 60 mm 1.5 or 2.36" paper width can be selected using the label paper spacer packed in the box.(By adjusting the label paper spacer, it is also possible to set optional positions in the range of 38 mm to 70 mm 1.5 to 2.76".

When you attach the label paper spacer, you must also specify the paper width setting in the NV memory to match the print areas.


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Electrical Specifications
Dimensions and Mass

Operating voltage: +24 VDC ± 7% (optional power supply: EPSON PS-170 or PS-180)

Pin assignments for the power connector:

Height: Approx. 203 mm 7.99"

Width: Approx. 140 mm 5.51"

Depth: Approx. 148 mm 5.83"

Weight: Approx. 1.9 kg 4.19 lb (not including paper)

Table A-2 Pin assignment for the power connector

Pin # Function

1 +24V

2 GND

3 N.C.

SHELL F.G.

1

2

3



Environmental Conditions

Temperature:

Operating: 5 ∼ 45°C 23-113°F (See the figure below.)

Storage: -10 ∼ 50°C 14-122°F (except for paper)

Humidity:

Operating: 10 ∼ 90% RH (See the figure below.)

Storage: 10 ∼ 90% RH (except for paper)

[%RH]

90

80

60

40

20

10

0 0 10 20 30 40 50

Relative humidity

Ambient temperature [°C]

Operating

34°C, 90%

40°C, 65%

45°C, 50%environment range


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Drawer Kick-out Connector
Pin assignments

+24V is always output through pin 4 during power on.

Interfaces

Various interface boards (EPSON UB series, except for the UB-P02) can be used.

Buttons and Switches

Power switch

The power switch (non-locking, push switch) on the right part of the front face of the unit turns the printer on or off.

You can use the DIP switches to enable or disable the power switch.

Panel Button

Feed (FEED) button:

Note:The ESC c 5 command enables or disables the panel button. When disabled, the button will not function.

Table A-3 Drawer kick-out connector pin assignments

Pin Number Signal Name Direction

1 Frame GND —

2 Drawer kick-out drive signal 1 Output

3 Drawer open/close signal Input

4 +24 V —

5 Drawer kick-out drive signal 2 Output

6 Signal GND —

Type: Non-locking push button

Function: Feeds paper. The paper cannot be fed if:(1) roll paper end detector detects no paper.(2) cover is open.

1 6



DIP Switches and NV Memory

For explanations of the DIP switches and the NV memory, see Chapter 6, “Installation.”

Indicators

Panel LEDs

Power (POWER) LED: Green

Paper roll end (PAPER OUT) LED: Red

Error (ERROR) LED: Red

ON: Power is stable.

OFF: Power is not stable.

On: The paper roll near end or real end is detected.

Off: Paper is loaded (normal condition)

Blinking: Waiting for the self-test print to continue. Or, it is waiting for the macro execution command.

Table A-4 PAPER OUT LED blinking pattern

State PAPER OUT LED Blinking Pattern Recovery Conditions

Waiting for self-test printing to continue or macro execution ready state.

PAPER OUT Pressing the PAPER FEED button continues self-test printing or executes a macro.

On: Offline (except during paper feeding using the FEED button, self-test printing, and the error state)

Blinking: Error (See the section “Error types and processing” in Chapter 2.)

Off: Normal condition.

Approx. 320 ms


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Appendix BOverview of the Mechanisms

This printer consists of the next four units:

Cover unit

Print/paper feed unit

Paper supply unit

Autocutter unit

The illustration below shows an external view of the printer mechanism:

Cover unit

aper supply unit

Print/paper feed unit

Autocutter unit

Rev.B Overview of the Mechanisms Appendix B-1

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Cover Unit
The cover unit is installed onto the paper supply unit by a hinge, and it makes a rotational movement.

Attached to the platen holder of the cover unit are the paper feed roller shaft holder, platen, cover open lever, lever shaft, lever button, fixed blade, and reflective photo detector. The reflective photo detector is able to detect the black mark on the non-printing surface of the paper.

When an operator closes the cover unit, the cover open lever is engaged by the protrusions on the print/paper feed unit and the cover unit is locked to the print/paper feed unit.

At this time, the paper feed roller shaft holder hits the locators on the right and the left frames of the print/paper feed unit, and the platen is secured into place. The platen gear attached to the lever shaft is engaged with the reduction gear on the print/paper feed unit, and can rotate the platen.

A proper load is applied to the cover unit by the leaf spring on the paper supply unit. When an operator manipulates the lever button while the cover unit is closed, the lock between the cover open lever and the print/paper feed unit is released, and the cover unit opens slightly. Then the cover unit can be fully opened by the operator.

Although the cover open lever and the lever button are installed onto a single lever shaft, they can move individually, allowing the cover unit to be closed without manipulating the lever button.

Platen holder

Cover open lever

Hinge

Lever shaft

Lever buttonPaper feed roller shaft holder

Fixed blade

Platen

Paper feed roller shaft holder

Reflective photo detector

Appendix B-2 Overview of the Mechanisms Rev.B


Print/Paper Feed Unit

The print/paper feed unit consists of various frames, thermal print head, head holder mechanism, paper feed motor, reduction gear, and cover open detector.

The right and the left frames supporting the thermal print head can be installed or removed together with the paper supply unit, and provide the locator for the paper feed roller shaft holder.

The circuit board frame holds the main circuit board that controls the printer mechanism.

The cover open detector detects if the cover unit is closed or open.

Rotating the paper feed motor when the cover unit is closed drives the reduction gear to rotate the platen. Thermal paper is fed, if it is rolled up on the platen.

With the thermal paper pinched between the platen and the thermal print head, the printing is performed by heat generation in the heating element of the thermal print head.

Thermal print head

Head holder mechanismPlaten shaft holder locator

Cover open detector

Frame R

Frame L assembly

Reduction gears

Paper feed motor

Circuit board frame


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Thermal Print Head
The thermal print head consists of a head chip that includes the heating element, a driver IC that controls each dot of the heating element, a thermistor that detects the temperature of the thermal print head, radiation plate, and connector.

Principles of Thermal Printing

When the print signal energizes a corresponding dot of the heating element with the specified pulse, the dot heats up to a high temperature, and dissolves the color-forming ingredient of the color-forming layer on the thermal paper that is contacting the dot. When the transparent color-forming layer is dissolved at room temperature, it generates color. When the temperature cools down, it is fixed again to the thermal paper side, thus forming printing.

The color can be set to various colors by changing the formulation of chemicals used for the color-forming layer, but the popular thermal paper is the one that forms the color black.

Depending on the paper type, environment, and printing conditions, part of the dissolved color-forming layer may be deposited on the thermal printer head side. In this case, you need to clean the heat-generating element of the thermal print head.

Data Input and Printing

Serial print data input from DATA IN synchronizes with the CLOCK signal, and is transmitted to the SHIFT REGISTER within the driver IC. It is then recorded to the LATCH REGISTER within the driver IC on the LATCH signal timing, turns on the gate with the STROBE signal, and energizes the heating element.

The STROBE signal (energizing pulse width) is set properly, depending on the voltage, thermistor-detected temperature, and print speed, to obtain the optimum print density. There are two terminals for STROBE, which can be driven with up to two parts by hardware. Normal printing performs one-part printing for printing speed, and two-part printing for high-duty printing, which causes a high-voltage drop.

Radiation plate

Head chip

Driver IC

Connector



Paper Supply Unit

The paper supply unit consists of the label holder, paper detection LED, NE detector, and hinge cover.

The label guide is attached to the label holder and interlocks with the cover unit. This allows the TM-L90 to receive paper roll in the correct position, whether the unit is installed vertically or horizontally. The guide rollers that receive the paper roll ease the load that occurs during paper feed, improve the paper-feed pitch accuracy, and ease the maximum load applied to the paper feed motor.

The paper detection LED works with the reflective photo detector on the platen holder and detects the several types of paper. The paper detection LED is covered by a transparent resin to prevent the detector from being destroyed by static. The NE detector detects the remaining amount of roll paper. It can be set to perform detection at two points, depending on the setting. This detector can be rotated by loosening it with a coin, and allows detection whether the TM-L90 is installed vertically or horizontally.

The switch circuit board is installed onto the hinge cover, and the printer settings can be configured with the DIP switches or FEED button, even when the cover is open. The printer status is shown with LEDs.

LEDsLabel guide

Switch circuit board (inside)

DIP switch

Feed switch

Hinge cover

Label holder

NE detector

Paper detection LED

Guide rollers


Confidential
Changing the paper width
The unit can handle paper roll widths of 38 mm to 70 mm 1.5 to 2.76", when you install a paper spacer into the label holder.

Autocutter Unit

The autocutter unit is installed into the print/paper feed unit, and consists of a movable blade, cutter sub-assembly motor, movable blade position detector, power transmission mechanism, and frame.

The autocutter unit’s movable blade and the fixed blade attached to the cover unit cross each other, and cut paper with the principle of scissors.

Appearance of paper spacer

Paper spacer is attached to the label holder (example)

Cutter sub-assembly motor

Movable blade position detector

Power transmission mechanism

Manual cutter

Knob

Movable blade



Opening the cover unit separates the two blades. Closing the cover unit while the movable blade is in the standby position makes the fixed blade hit the frame portion of the autocutter unit, and is set to the correct position against the movable blade.

The movable blade is always in the standby position, and is moved to the intersecting direction against the fixed blade by various gears. If paper is present, it is cut between the movable and the fixed blades. Then, the movable blade returns to the standby position.

The movable blade position detector detects if the movable blade is in the standby position or not.

The power transmission mechanism is equipped with a one-way clutch that cuts power transmission when the movable blade catches on foreign material or something.

Full cut and partial cut

The paper cutting can be set to either of two methods (full-cut and partial-cut) by changing the autocutter installation position on the print/paper feed unit.

Manual cut

You can also use the manual cutter to cut paper manually.



Appendix CTools

Table C-1 Tools

Tool Specifications Purpose Source

Torque-limiting hexagon box driver Tip size: 5 mm

The tightening torque for the nut should be between 34.3 to 39.2 Ncm (3.5 to 4.0 kgcm).

Remove and install the paper feed motor

Use commercially available product.

Crosshead screwdriver No. 0, 1, 2 Disassembly and assembly Use commercially available product.

Flathead screwdriver — Disassembly and assembly Use commercially available product.

Tweezers — Disassembly and assembly Use commercially available product.

Wrist strap (static electricity countermeasure)

— Disassembly and assembly Use commercially available product.

E-ring holder 1.5, 3 Disassembly and assembly Use commercially available product.

Rev.B Tools Appendix C-1


Appendix DParts List

Alphanumeric List

Table D-1 Alphanumeric list

Name for service manual Name for price list Q’ty Ref.# Note

Autocutter unit AUTO CUTTER UNIT 1 162

Auxiliary holder plate PLATE,HOLDER AUXILIARY 1 169

BM detector holder HOLDER,BM DETECTOR 1 112

BM paper detector circuit board assembly

CIRCUIT BOARD,BM PAPER DETECTOR ASSEMBLY

1 213

Bottom plate PLATE,LOWER 1 165

Caution seal SEAL,CAUTION,C 1 106

Center frame FRAME,CENTER 1 119

Circuit board frame FRAME CIRCUIT BOARD,A 1 111

Connector cover COVER,CONNECTOR,AA 1 141

Cover detector assembly COVER,DETECTOR ASSEMBLY 1 166

Cover leaf spring PLATE SPRING,COVER 1 124

Cover open lever LEVER,COVER OPEN 1 128

Cover rotation shaft SHAFT,COVER TURNING 2 133

Cover tape TAPE,COVER 1 160 Accessory

Cutter cover COVER,CUTTER,AA 1 139

Cutter frame assembly FRAME,CUTTER ASSEMBLY 1 149

Cutter motor sub-assembly MOTOR,CUTTER SUB ASSEMBLY 1 151

NE detector adjustment screw SCREW,DETECTOR ADJUSTMENT, N.E. 1 101

DIP switch cover COVER,DIP SWITCH 1 154

E-ring (E1) RETAINING RING — E1

E-ring (E2) RETAINING RING — E2

FEED button BUTTON,FEED,AA 1 131

Feed sheet SHEET,FEED,A 1 135

Feed spacer SPACER,FEED 1 132

Ferrite core FERRITE CORE 1 211

Fixed blade FIXED BLADE 1 114

Fixed blade holder spring SPRING,BLADE HOLDER 1 104

Frame L assembly FRAME,L ASSEMBLY,A 1 142

Rev.C Parts List Appendix D-3

Confidential

Frame R FRAME,R 1 107

Frame strengthening plate L PLATE,FRAME STRENGTHEN,L 1 110

Frame strengthening plate R PLATE,FRAME STRENGTHEN,R 1 109

Front frame FRAME,FRONT 1 108

Handling label LABEL,OPERATION,BA 1 155

Head caution seal SEAL,CAUTION,HEAD B 1 103

Head FFC FFC,HEAD 1 207

Head holder spring SPRING,HEAD HOLDER 2 125

Hinge cover COVER,ARM,AA 1 127

Hinge spacer SPACER,HINGE 2 172

I/F circuit board unit I/F CIRCUIT BOARD UNIT 1 202

Label paper guide GUIDE,LABEL 1 126

Label paper holder HOLDER,LABEL 1 120

Label paper platen holder HOLDER,LABEL PLATEN 1 156

Label paper spacer SPACER,LABEL 1 173 Accessory

LED holder assembly HOLDER,LED ASSEMBLY 1 121

Lever button BUTTON,LEVER,AA 1 130

Lever shaft SHAFT,LEVER 1 129

Logo plate LOGO PLATE,AB 1 102

Main case assembly CASE,MAIN ASSEMBLY,AA 1 136

Main circuit board unit MAIN CIRCUIT BOARD UNIT 1 201

Manual cutter MANUAL CUTTER 1 167

Manual cutter screw SCREW,MANUAL CUTTER 3 148

Micro switch MICRO-SWITCH 1 146

Mini-clamp MINI CLAMP 1 179

Motor ground plate GROUND PLATE,MOTOR 1 118

NE detector holder HOLDER,N.E.DETECTOR 1 145

NE detector lead wire LEAD WIRE,N.E.DETECTOR 1 206

NE detector lever LEVER,N.E.DETECTOR 1 144

Nut (N1) HEXAGON NUT - N1

Paper cutter cover assembly COVER,PAPER CUTTER ASSEMBLY,B 1 150

Paper feed motor MOTOR,PAPER FEED,B 1 205

Paper feed motor damper DAMPER,PAPER FEED MOTOR 3 117

Paper feed roller shaft holder SHAFT HOLDER,PAPER FEED ROLLER 1 164

Paper holding roller ROLLER,PAPER HOLD 8 122

Paper outlet guide GUIDE,PAPER OUTLET,AA 1 174 Accessory



Appendix D-4 Parts List Rev.C


Paper outlet tape TAPE,PAPER OUTLET 1 175 Accessory

Plain washer (W1) PLAIN WASHER — W1

Platen assembly PLATEN ASSEMBLY 1 163

Power switch cover COVER,POWER SWITCH,AA 1 157 Accessory

Reduction gear C GEAR,REDUCTION,C 1 115

Reduction gear D GEAR,REDUCTION,D 1 116

Roll paper cover assembly COVER,ROLL PAPER ASSEMBLY,BA 1 152

Rubber foot A RUBBER FOOT,A 4 140

Rubber foot C RUBBER FOOT,C 4 159

Screw (S1) C.B.P-TITE,3X10,F/ZN — S01

Screw (S10) C.C.S. SCREW — S10 Accessory

Screw (S2) C.C.P-TITE SCREW,3X8,F/ZN — S02

Screw (S3) C.B.B.SCREW,4X12,F/ZN — S03

Screw (S4) C.B.S. SCREW — S04

Screw (S5) C.B.S. SCREW — S05

Screw (S6) C.P.S.(O) SCREW — S06

Screw (S7) C.B.B-TITE SCREW — S07

Screw (S9) C.B. SCREW — S09

Shield plate PLATE,SHIELD 1 180

Spacer SPACER,3x4x4 3 153

Spacer B SPACER,B 2 178

Spacer guide plate PLATE,SPACER GUIDE 1 171

Spacer guide shaft SHAFT,SPACER GUIDE 1 170

Spacer (3X4X4) SPACER,3X4X4,F/ZN 3 153

Spring holder plate PLATE,SPRING HOLDER 1 113

Sub circuit board assembly SUB CIRCUIT BOARD ASSEMBLY,AA 1 209

Switch circuit board assembly SWITCH CIRCUIT BOARD ASSEMBLY,AA 1 210

Switch circuit board FFC FFC,SWITCH CIRCUIT BOARD 1 208

Switch panel holder HOLDER,SWITCH PANEL 1 134

Switch panel label LABEL,SWITCH PANEL,BA 1 158 Accessory

Switch screw SCREW,SWITCH,1 2 105

Tension plate spring SPRING,TENSION PLATE 2 123

Thermal print head assembly THERMAL PRINT HEAD ASSEMBLY,C 1 147




Confidential
Reference Number List
Table D-2 Reference number list

Ref.# Name for service manual Name for price list Q’ty Note

101 NE detector adjustment screw SCREW,DETECTOR ADJUSTMENT, N.E. 1

102 Logo plate LOGO PLATE,AB 1

103 Head caution seal SEAL,CAUTION,HEAD B 1

104 Fixed blade holder spring SPRING,BLADE HOLDER 1

105 Switch screw SCREW,SWITCH,1 2

106 Caution seal SEAL,CAUTION,C 1

107 Frame R FRAME,R 1

108 Front frame FRAME,FRONT 1

109 Frame strengthening plate R PLATE,FRAME STRENGTHEN,R 1

110 Frame strengthening plate L PLATE,FRAME STRENGTHEN,L 1

111 Circuit board frame FRAME CIRCUIT BOARD,A 1

112 BM detector holder HOLDER,BM DETECTOR 1

113 Spring holder plate PLATE,SPRING HOLDER 1

114 Fixed blade FIXED BLADE 1

115 Reduction gear C GEAR,REDUCTION,C 1

116 Reduction gear D GEAR,REDUCTION,D 1

117 Paper feed motor damper DAMPER,PAPER FEED MOTOR 3

118 Motor ground plate GROUND PLATE,MOTOR 1

119 Center frame FRAME,CENTER 1

120 Label paper holder HOLDER,LABEL 1

121 LED holder assembly HOLDER,LED ASSEMBLY 1

122 Paper holding roller ROLLER,PAPER HOLD 8

123 Tension plate spring SPRING,TENSION PLATE 2

124 Cover leaf spring PLATE SPRING,COVER 1

125 Head holder spring SPRING,HEAD HOLDER 2

126 Label paper guide GUIDE,LABEL 1

127 Hinge cover COVER,ARM,AA 1

128 Cover open lever LEVER,COVER OPEN 1

129 Lever shaft SHAFT,LEVER 1

130 Lever button BUTTON,LEVER,AA 1

131 Feed button BUTTON,FEED,AA 1

132 Feed spacer SPACER,FEED 1

133 Cover rotation shaft SHAFT,COVER TURNING 2

134 Switch panel holder HOLDER,SWITCH PANEL 1



135 Feed sheet SHEET,FEED,A 1

136 Main case assembly CASE,MAIN ASSEMBLY,AA 1

139 Cutter cover COVER,CUTTER,AA 1

140 Rubber foot A RUBBER FOOT,A 4

141 Connector cover COVER,CONNECTOR,AA 1

142 Frame L assembly FRAME,L ASSEMBLY,A 1

144 NE detector lever LEVER,N.E.DETECTOR 1

145 NE detector holder HOLDER,N.E.DETECTOR 1

146 Micro switch MICRO-SWITCH 1

147 Thermal print head assembly THERMAL PRINT HEAD ASSEMBLY,C 1

148 Manual cutter screw SCREW,MANUAL CUTTER 3

149 Cutter frame assembly FRAME,CUTTER ASSEMBLY 1

150 Paper cutter cover assembly COVER,PAPER CUTTER ASSEMBLY,B 1

151 Cutter motor sub-assembly MOTOR,CUTTER SUB ASSEMBLY 1

152 Roll paper cover assembly COVER,ROLL PAPER ASSEMBLY,BA 1

153 Spacer (3X4X4) SPACER,3X4X4,F/ZN 3

154 DIP switch cover COVER,DIP SWITCH 1

155 Handling label LABEL,OPERATION,BA 1

156 Label paper platen holder HOLDER,LABEL PLATEN 1

157 Power switch cover COVER,POWER SWITCH,AA 1 Accessory

158 Switch panel label LABEL,SWITCH PANEL,BA 1 Accessory

159 Rubber foot C RUBBER FOOT,C 4

160 Cover tape TAPE,COVER 1 Accessory

162 Autocutter unit AUTO CUTTER UNIT 1

163 Platen assembly PLATEN ASSEMBLY 1

164 Paper feed roller shaft holder SHAFT HOLDER,PAPER FEED ROLLER 1

165 Bottom plate PLATE,LOWER 1

166 Cover detector assembly COVER,DETECTOR ASSEMBLY 1

167 Manual cutter MANUAL CUTTER 1

169 Holder auxiliary plate PLATE,HOLDER AUXILIARY 1

170 Spacer guide shaft SHAFT,SPACER GUIDE 1

171 Spacer guide plate PLATE,SPACER GUIDE 1

172 Hinge spacer SPACER,HINGE 2

173 Label paper spacer SPACER,LABEL 1 Accessory

174 Paper outlet guide GUIDE,PAPER OUTLET,AA 1 Accessory

175 Paper outlet tape TAPE,PAPER OUTLET 1 Accessory




Confidential

178 Spacer B SPACER,B 2

179 Mini-clamp MINI CLAMP 1

180 Shield plate PLATE,SHIELD 1

201 Main circuit board unit MAIN CIRCUIT BOARD UNIT 1

202 I/F circuit board unit I/F CIRCUIT BOARD UNIT 1

205 Paper feed motor MOTOR,PAPER FEED,B 1

206 NE detector lead wire LEAD WIRE,N.E.DETECTOR 1

207 Head FFC FFC,HEAD 1

208 Switch circuit board FFC FFC,SWITCH CIRCUIT BOARD 1

209 Sub circuit board assembly SUB CIRCUIT BOARD ASSEMBLY 1

210 Switch circuit board assembly SWITCH CIRCUIT BOARD ASSEMBLY 1

211 Ferrite core FERRITE CORE 1

213 BM paper detector circuit board assembly

CIRCUIT BOARD,BM PAPER DETECTOR ASSEMBLY

1

E1 E-ring (E1) RETAINING RING —

E2 E-ring (E2) RETAINING RING —

N1 Nut (N1) HEXAGON NUT —

S01 Screw (S1) C.B.P-TITE,3X10,F/ZN —

S02 Screw (S2) C.C.P-TITE SCREW,3X8,F/ZN —

S03 Screw (S3) C.B.B.SCREW,4X12,F/ZN —

S04 Screw (S4) C.B.S. SCREW —

S05 Screw (S5) C.B.S. SCREW —

S06 Screw (S6) C.P.S.(O) SCREW —

S07 Screw (S7) C.B.B-TITE SCREW —

S09 Screw (S9) C.B. SCREW —

S10 Screw (S10) C.C.S. SCREW — Accessory

W1 Plain washer (W1) PLAIN WASHER —





Reference for Screw Types

Standard Screws

Table D-3 Standard screw types

Head (top) Head (side) Body Washer (assembled)

C (Cross) P(Pan)

B (Bind)

C (Cup)

S-tite

B-tite

P-tite

T-B

(S) (Spring lock washer)

(S-P1)/(S-P2)/(S-P3)/(S-P4) (Spring lock washer + plain washer)

(O) (Outside toothed lock washer)

(P1)/(P2)/(P3)/(P4) (Plain washer)

(O-P1) (Outside toothed washer + plain washer)

Head (top)

Head (side) Washer (assembled)

Body


Confidential
Special Screws
Table D-4 Special screws

Overview Ref. #

101

105

148




Overall Exploded Diagram

Case Unit

131

130

133

171

152

155

158

123

129

179

123

128

104

114

156

163

112

164

180

213

102

157

160

139

201

136

173

141

202

140106

140

159

132

E2

E2

S6

E2

E2

E2

S1

S5S3

S6

S6

S5

S7

S1

E2

211

E2

S1

140

140

S6

172

172

175

174

S6

S6

S7S7

S7

159

159

159

S10

133

178

E

H

G

A

C

B

L

N

C

K

A

B

J

H

I

G

K

F

F

N

E

D

D

I

J

L



Printer Mechanism

127

210

134

S2

208

146

144

145

126

170

110

115E2

E2

E2

116

142153

153

118

153117

205

119

117

117

107

109

166

165

101

150

167148

148

148

151

105

149

207

147

113125

166

135

154S2

S2S1

S1

162

206

121

120

122

122

122

122

122122

213

122

122

125

209

111

124

108

S6

S6

S4

S9

S9

S4

E1 N1

S7 S4

W1N1

N1

W1N1

S1

S4

S1

S4

S4

S6

S6

S6

S6

105

S4

S4

S4

S2

169

103

L

M

O

C

T

S

TA

A

B

G

G

H

H

I

I

F

F

Q

B

D

D

E

E

J

J

N

U

S

C

O

P

U

N

M

L

K

R

R

Q

VV

W

W

P

X

X

Rev.B Lubrication Points Diagram Appendix E-1


Appendix ELubrication Points Diagram

G-36G-36

G-36

G-36

G-36

G-15

G-36

G-45

G-36

G-36

G-45

G-45

G-36

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45

G-45


Appendix FOverview of Electric Circuits

General Description

The figure below shows a block diagram of the electric circuits for the TM-L90.

Sw

itch

boar

d(w

ith D

IP s

witc

h)

I/F c

ircui

t boa

rd

Pow

ersw

itch

Pow

erco

ntro

l ci

rcui

t

Vol

atile

RA

M(U

8)D

RA

M

Fon

t RO

M(U

9)F

lash

EE

PR

OM

Pro

gram

RO

M(U

7)F

lash

EE

PR

OM

CP

U(U

4)B

US

VI0

VB

US

Pap

er fe

ed m

otor

driv

eci

rcui

t

Aut

o cu

tter

mot

or

driv

e ci

rcui

t

Sen

sor

circ

uits

The

rmal

hea

d dr

ive

circ

uit

The

rmal

hea

d

Prin

ter

mec

hani

sm

VI0

+5V

pow

er s

yste

m

+3.

3V p

ower

sys

tem

+24

V p

ower

sys

tem

DK

D d

river

I/F c

ircui

t boa

rd

inte

rfac

e

Sw

itch

boar

din

terf

ace

Hos

tin

terf

ace

Dra

wer

Pow

er s

uppl

y

CN

7

CN

6

CN

4C

NS

3C

NS

1

CN

S2

CN

11,1

2,13

CN

10

CN

8

CN

9

Mai

n ci

rcui

t boa

rd u

nit

TM

-L90

+24

V

Sub

boa

rd

Rev.B Overview of Electric Circuits Appendix F-1

Confidential
The main circuit board unit is comprised of circuits used to control the CPU, memory, mechanism drive unit, detectors, and power supply. It forms the nucleus of the control system for the TM-L90.

ProgramROM

Font ROM

DRAM

CPU

Appendix F-2 Overview of Electric Circuits Rev.B

The table below lists the main elements of the main circuit board unit and their functions.
Table F-1 Main elements and their functions for main circuit board unit

Block LocationSignals on diagram Description Functions

CPU and peripherals

U4 — — CPU and custom logic I/O ports

U7 — max 8M bit (512K*16 bit) Program memory

U8 — 4M bit (256K*16 bit) DRAM

U9 — 8M bit (512K*16 bit) Font Memory

X1 — 40 MHz System clock (for U4)

X2 — 25 MHz System clock (for U4)

Power supply system

F1 154004T 4A, surge-proof Printer power supply fuse

Q1 +24V 24 VDC, 1.7A Semiconductor switch for power supply to mechanism

QS1, QS2 +24V OUT 24 VDC, 1.7A Semiconductor switch for power supply to printer

U1K DKP 24 VDC, 1A Power supply to drawer

LH9 VH 2 Power supply for thermal head

UZ1 VIO 5 VDC, 1.5A Power supply to I/O logic circuits

UZ2 VBUS 3.3 VDC, 0.15A Power supply to bus logic circuits

Connectors CN6 I/F BOARD — Universal interface board (UIB) connector

CN10 HEAD — Connector for thermal head unit connection (front of the printer)

CN11 NE — Connector for paper near-end connection

CN12 RE — (for TM-T90 only)

CN13 Label photo — Connector for transmission sensor photo connection

CN4 SUB — Connector for sub circuit board connection

CN7 SWITCH — Connector for switch circuit board connection

CN8 A/C — Connector for autocutter unit connection (front of the printer)

CN9 PF — Connector for PF motor connection

Switch SW1 — — Power switch (front of the printer)

Interfaces QK2, QK3 DKD 1, DKD 2

24 VDC, 1A Drawer drive transistor output signal

Mechanism drivers

QMA1 ACM+, ACM-

24 VDC, 0.25A Driver and output signal for push-pull cutter motor

UP1, UP2 PF_A+, PF_A-, PF_B+, PF_B-

24 VDC, 0.7A Driver and output signal for PWM power supply control of bipolar stepping motor for feed mechanism


Confidential
Power circuit
The power circuit generates three voltages (+5 V, +24 V and +3.3 V). Each voltage is supplied to the circuits listed below:

Power Supply On/Off ControlThe figure below shows a block diagram of the power supply and on/off control circuit.

The logic circuit operates according to the specifications listed in the table below.

Table F-2 Output voltages and their applications

Voltage Level Application

+5 V • Logic circuit (used mainly for circuits around CPU)

+24 V • Print mechanism power supply • Drawer kick power supply• Interface circuit board unit power supply

+3.3V • Logic circuit (used mainly for circuits around memory)

Table F-3 Logic circuit functions

DC IN Dip switch 1-1 Power Switch DC Out

IN ON OFF ON

OFF 1 sec ON ON

OFF 3 sec ON OFF

Power supplyAC

DIP SW

Power switch

DC output

Logic circuit

Semiconductor switch

Power off command

TM-L90



DIP switch on the main circuit board (DSW2)

This DIP switch is used only at the factory. Always set this to OFF.


The switch circuit board assembly consists of three LEDs, one switch, and one DIP switch.


The next table shows the major components of the sub circuit board and their major functions:

Interface Circuit Board Unit

The interface circuit board unit serves as the core of the system that controls data send and receive operations between the TM-L90 and host computer. Various interface circuit boards can be used (including the EPSON UB series, except for the UB-P02 and UB-S03).

Table F-4 Major components of the sub circuit board unit and their major functions

Block Location Signal name Description Function

Connector CNS1 PS — Connector for PS adapter connection

CNS2 DKD — Connector for drawer connection

CNS3 — — Cable for main circuit board connection


Confidential
Test Points
Test points on the main circuit board

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

Table F-5 Checking the power supply line

Power source Terminal name Test terminal Parts terminal Normal value

Power source for logic circuit (DC)

Semiconductor switch ON — DS1, C 15V

Semiconductor switch OFF 24V

Power source for logic circuit (VIO) VIO UZ2, #4 5V

Power source for logic circuit (VBUS)

VBUS UZ2, #5 3.3V

Power source for logic circuit (GND)

GND — 0V

Power source for mechanisms

+24V-operated components (printer mechanism)Drive power source (Q1, ON)

— Q1, D 24V

Paper feed motor Rotating REF_PF — 0.81~1.36V

Halted 0.0V

Power source for I/F board

— — CN6, #5 24V

Power source for drawer

— — UK1 pin#3 24V



Test Point Locations

Test Point Locations (Side A)

Test Point Locations (Side B)

REF_RF

Q1

CN6

GND

UK1

VBUS

VIO

R38

UZ2

DS1


Confidential
Parts Layout

Parts Layout for the Main Circuit Board Unit (Side A)


Parts Layout for the Main Circuit Board Unit (Side B)

Confidential
Parts Layout for the Switch Circuit Board (Side A)

Parts Layout for the Switch Circuit Board (Side B)



Rev.B Appendix F-12


Circuit Board Diagrams

Main Circuit Board (1 of 3) (Drawing Number 1)

ReservedReservedReserved

AD

4

short(1)

short(5)

short(2)

short(3)

short(4)

sh

ort

(6)

short(7)

sh

ort

(8)

BLOCK(2)

BLOCK(3)

BLOCK(4)

BLOCK(5)

BLOCK(6)

AT41

A9A8 AT13

A1

AT43

A11

D0D1

D3

A10

A20

A3A2

A0

A15

A13

A12

A14

A16

A18A19

A17

nRESETnNMI

A4

A7

A5A6 AT10

AT18

D11

D8

AT51D9D10

AT49

D5D4

D6D7

AT45

AT66D14D15

D12D13

A21

AT35

nFNTCE

nRAS2nPGMCE

nWRnLCASnHCASnRD

AC_1AC_2

DKD2

AT79

DKD1

DSIO

DST1DST2DPCODCLK AT89

AT98AT99

AT95

AT96

AT100

AT102AT103

AT101

AT194

AT196

AT197

OFF_CTRLSWV24AT191

AT189

nTIMO2

nTIMO1nTIMI2nTIMI1

SODAT1AT181

SICLKSIDAT

SILAT

AT169 nSPDV24nSERVHDAT170

nRTCINTAT173

MFS

RPM_PHB2AT140AT139 RPM_PHB1

PTLED2

PTLED1

AT160 IJLPIJDAT159IJCLKOAT158IJCLKEAT157

HRTSAT156

HRA3

HRLD

HRDATA

DADATDACLK

AT141 RRE

DKDS1

AT127 RCR_PHB1RCR_PHA2AT126

RPF_PHB1

RPF_PHA1AT119

RPF_PHB2

RPF_PHA2

HCTSCTS

CLKIN/DTR

nCLK_REQ

EXT_RESAT105

N25_RESAT107

AT61

AT57

AT131

AT70

AT132

D2

AT193

AT142 AC_RST

AT38

AT184

AT42

AT175 RTC_DAT

AT80

AT17

AT63

AT187

AT19

AT185

AT178

AT4

AT44

AT85

INK_CTRGAT168

AT65

AT11

OSC3

AT86

SOCLK1AT182

AT15

AT53

AT81

AT12HCLK2AT155

AT50

AD

7

AT

19

5

AT

194

AT

174

AT

173

AT148AT147

AT144

Xin

AT

103

AT

98

AT

88

AT

82

AT47

AT28

AT23

AT20

AT15

SV

HD

AT

178

AT

167

AT129

AT126

AT115

AT

94

AT

92

AT29

AT2

AT5

AR

RE

AT

163

AT

159

AT113

AT

63

AT30

AT14

AT28

AT32nCE14

AT123 RNE

AT16

AT25 SV

24

AT

192

AT

183

AT149

AT127

AT

78

AT

66

AT27

AT19

AT17

AT7

AT9

CR_HPAT172

AT120

AT

16

6

AT120AT119

AT

84

AT

77

AT

61

AT

57

AT16

AT33

HRCLK

AT183 SOLAT1

AT

18

6

AT

17

0

AT

158

AT

91

AT48

AT41

AT35

AT18

AT8

AT37

AT165

AT167 CVS

AT179

AT39

AT122 INK_NE

AT67

AT

177

AT

16

1

AT132

AT123

AT105

AT

10

0A

T99

AT

64

AT

58

AT37

AT34

AT10

AT4

AT106 DSR_RES

RXD

AT137 RPM_PHA1

AT58

AT78

AT47

AT

184

AT

157

AT118

AT111

AT

79

OS

C4

AT

68

AT39

AT38

AT24

AT9

AT36

AT176 RTC_CE

AT125 RCR_PHA1

Xout

AT

187

AT

18

5

AT137

AT121

AT42

AT25

AT88

AT34nULCE

AT

179

AT150

Xout

AT

87

AT

81

AT

76

AT51

AT46

AT26

AT7

AT11

AT129

AT174 RTC_CLK

AT64

AT6

AT59

AT87

Xin

AT186

AT

17

6

AT

16

5

AT155

AT141

AT131

AT128

AT

102

AT

10

1

AT

95

AT

67

AT

62

AT48

AD

6

AT

18

1

AT156

AT143

AT140

AT130

AT116

AT107

AT192

AT163

AT20

AT143

HRA0

AT121

AT

172

AT138

AT

96

AT

85

AT

69

AT23

AD

5

AT

19

6

AT

193

AT114

AT

93

AT

89

AT

86

AT5

AT1

AT118

AT138 RPM_PHA2

AT144

AT177

ST

H

AT

197

AT

17

5

AT

168

AT146

AT122

AT

65

AT45AT44

AT43

AT21

AT13

TXD

AT62

AT14

HRA2

AT21

RTS

AT27

AT

169

AT152

AT142

AT134

AT112

AT109

AT108

AT106

AT

80

AT50AT49

AT36

AT32

AT24

AT26

AT84

AT

189

AT

182

AT

16

0

AT154

AT151

AT139

AT125

AT

59

AT33

AT8

AT6

DST0

AT

164

DSWMEM

AT

70

AT

104

AT

97

OS

C3

AT

53

AT

19

1

AT

19

0A

T71

DST2

DST1

DCLK

DST0

DSIO

DPCO

UIBSEL

AT112AT111 DETAT109AT108

AT116

AT114AT113

AT115

AT151

AT152

AT146

HCLK1AT154

AT147

AT148

AT150

AT93

AT94

AT91AT92

nCE17 AT29

nCE15 AT30

OSC4

nOFF_TRG

AT69RINK_LED

RCR_PHB2AT128

AT166 CLS

IJREVAT161

AT52

BOARDTH

BOARDTH

AT

75

AT195

AT

73

AT

54

AT

83

AT

90

AT

56

PSWAT130

AT1AT2

AT31

AT149

HRA1

ROUT_LEDPWR_LED

RERR_LEDnWDTOUT AT82

AT77

AT68

AT164

AT76

D02D12D22D32

D42D52D62D72

D82

D102D92

D112

D122D132

D142D152

CLKIN/DTR 4

N25_RES 4DSR_RES 4

RXD 4DET 4

CTS 4

RNE 23DKDS1 5

AC_RST 23

MFS 20

CVS 23

nSPDV24 20

SIDAT 20

nTIMI1 20nTIMI2 20

HCTS 4

ARRE 23

nFNTCE2

nRAS22nPGMCE2

nWR2

nLCAS2nHCAS2nRD2

RTS 4

nCLK_REQ 4

TXD 4

EXT_RES 20

RPF_PHA1 24RPF_PHA2 24RPF_PHB1 24RPF_PHB2 24

DACLK 20DADAT 20

HRDATA 22HRCLK 22HRLD 22

HRA0 22

HRA1 22HRA2 22HRA3 22

PTLED1 23

PTLED2 23

SWV24 20

OFF_CTRL 8

nTIMO1 20nTIMO2 20

AC_16AC_26DKD15DKD25

SILAT 20

SICLK 20

UIBSEL 4

nRESET3,20

nNMI20

SV24 20STH 22

ALRE 23

DSWMEM 2

nOFF_TRG 8,20

A12A22A32

A42A52A62A72

A82A92A102A112

A122A132A142

A152

A162A172

A182A192

A202

A212

AT99

AT99

PSW 8

nWDTOUT20RERR_LED20

PWR_LED20

ROUT_LED20

VBUS

VBUS

VBUS

VBUS

VIO

C3

0 12

R33 1 2

INT2

R69 1 2

R79

12

R38

12

R84

12

nCE17

ATPGIN

R78

12

R75

12

AD6

C22

12

INT3

R87

12

C40

12

C3

31 2

C505

12

nCE15

AD7

INT4

C3

5

12

C506

12

C1

3

1 2

ATPGCE

R68 12

R271 2

R261 2

C1

1 12

C3

7

1 2

DMAREQ1

INT5

C507

12

ADTRG

C1

61 2

LM501

23

4 5

6781

INT6

DMAREQ0

EPSON JapanE01M06ACAither

U4

nRESETnNMI

VSS1A0/nBSLA1

VS

S10

A2

A5A6A7VDD1

A8

A4

A3

A9A10A11A12

A13A14A15A16VSS2

A17A18A19A20A21

nCE4/nCE11nCE9/nCE17nCE5/nCE15VDD2nCE8/nCE14/nRAS3

nCE7/nCE13/nRAS2nCE6nCE10EXnWRL/nWR/nWE/nLWEnLCAS/nUWE

nHCAS/nLWEnRDVSS3D0D1

D2D3D4VDD3D5

D6D7D8D9VSS4

BC

LK

VD

D4

VS

S6

PL

LC

ICE

MD

PLLS

1P

LLS

0V

SS

7

nX

2S

PD

D1

0D

11

D1

2D

13

D1

4D

15

nB

US

RE

Q/n

CE

6/P

34

nB

US

AC

K/P

35

C3

3T

ES

T

VD

D7

OS

C3

VD

D5

OS

C4

VS

S5

nD

MA

AC

K0

/P3

2n

WA

IT/n

CE

4&

5/P

30

nD

MA

AC

K2

/SIN

1/P

04

/IN

T4

nD

MA

EN

D2

/SO

UT

1/P

05

/IN

T5

nD

MA

AC

K3

/nS

CL

K1

/P0

6/I

NT

6

nD

MA

EN

D3

/nS

RD

Y1

/P0

7/I

NT

7n

DM

AE

ND

0/E

XC

L4

/P1

5V

SS

U6

DS

T0

/T8

UF

0/E

XC

L0

DS

T1

/T8

UF

1/E

XC

L1

DS

T2

/T8

UF

2/E

XC

L2

DP

CO

/T8

UF

3/E

XC

L3

DC

LK

/FO

SC

1/P

14

DS

IO

VS

S8

SIN

0/P

00

/IN

T0

SO

UT

0/P

01

/IN

T1

nS

CL

K0

/P0

2/I

NT

2n

SR

DY

0/P

03

/IN

T3

nD

RD

/P2

0/I

NT

0

nD

WE

/nG

AA

S/P

21

/IN

T1

VD

DU

2T

M0

/P2

2/I

NT

2T

M1

/P2

3/I

NT

3T

M2

/P2

4/I

NT

4

TM

3/P

25

/IN

T5

TM

4/P

26

/IN

T6

TM

5/P

27

/IN

T7

VD

D9

IF_RESETDSR_RESETN25_RESET

TXDRXD

VSSU1I/F_DET

nCLK_REQCLKIN/DTR

RTS

CTSHCTS

VDDU1RPF_PHA1RPF_PHA2

RPF_PHB1RPF_PHB2

RPF_I0/SNSIN9RPF_I1/SNSIN10

VSSU2

RCR_PHA1RCR_PHA2RCR_PHB1RCR_PHB2

RCR_I0/SNSIN11

RCR_I1/SNSIN12ATPGIN

ATPGCEXin

VDD8

XoutVSSU7

RPM_PHA1RPM_PHA2RPM_PHB1

RPM_PHB2RPM_I0/SNSIN13RPM_I1/SNSIN14

DACLKDADAT

VSSU3HRDATA

HRCLKHRLDHRA0

HRA1HRA2HRA3

VDDU3HCLK1

HCLK2HRTS

IJC

LK

EIJ

CL

KO

IJD

IJL

P

IJR

EV

VS

SU

4S

NS

IN1

5S

NS

IN1

6S

NS

IN1

SN

SIN

2S

NS

IN3

SN

SIN

4S

NS

IN5

SN

SIN

6

VS

SU

5S

NS

IN7

SN

SIN

8R

TC

_C

LK

RT

C_

DA

T

RT

C_

CE

SID

AT

SIC

LK

SIL

AT

VD

DU

4

SO

DA

T1

SO

CL

K1

SO

LA

T1

nT

IMI1

nT

IMI2

TIM

O1

TIM

O2

VD

D6

nA

DT

RG

/K5

2/I

NT

2V

DD

U5

SW

24

V_

1S

W2

4V

_2

SW

24

V_

3n

DM

AR

EQ

0/K

50

/IN

T0

nD

MA

RE

Q1

/K5

1/I

NT

1

nD

MA

RE

Q2

/K5

3/I

NT

3n

DM

AR

EQ

3/K

54

/IN

T4

VS

S9

AD

7/K

67

/IN

T7

AD

6/K

66

/IN

T6

AD

5/K

65

/IN

T5

AD

4/K

64

/IN

T4

VD

D1

0(A

VD

D)

AD

3/K

63

/IN

T3

AD

2/K

62

/IN

T2

AD

1/K

61

/IN

T1

AD

0/K

60

/IN

T0

RM111234 5

678

C24

12

R70 1 2

INT7

C26

12

C1

5 12

U31

234 5

67

8X1

X2GNDSSW CLKOUT

VDDFS1

SSON

R35 12

C20

12

nCE14

CN5123

45678

910

123

45678

910

R32

12

R502

12

R51 1 2

L8

1 2

R22 1 2

R21 12

TH500

12

C21

12

BCLK

1

C503

12

C500

12

RM151

234 5

67

8

R71 1 2

C41

12

U6123

4 5

678

X1X2GND

SSW CLKOUT

VDDFS1

SSON

C3

1 12

R28 1 2

R36 12

R83

12

R76

12

C504

12

RM71234 5

678

R37

12

C3

21 2

R811 2

R34 12

C3

9

1 2

L9

1 2

C3

6 12

RM16

123

45

678

R53 1 2

R72 1 2

R64 12

C1

2

1 2

RM91

234 5

67

8

RM4

12345

678

R80

1 2

C19

12

C27

12

L11

12

X1

13

2

L4

12

C25

12

RM212

34 5

6

78

R39

12

R47 1 2

R50 12

R56 1 2

nULCE

RM101234 5

678

R24 1 2

A0

R23 12

C3

41 2

R73 1 2

LM500

23

4 5

6781

R58 1 2

U_RXD

RM312

345

6

78

C28

12

L501 12

RM812

34 5

6

78

ICEMD

R102 12

C10

12

C52

12

C29

12

U_TXD

R103 12

R60 1 2

L7

12

INT0

R65 12

L500 12

R74 1 2

C51

12

R25

1 2

C18

12

X2

13

2 R821 2

C42

12

C3

81 2

U_RTS

L6

1 2

C33TEST

R46 1 2

R62 1 2

L5

12

L10

12

RM1123

4 5

678

R77

12

RM51

234 5

67

8

R29

12

R30 1 2

U_CTS

R85

12

C1

4

1 2

INT1

C23

12

RM61234 5

678

R31 1 2

R48 1 2

R88

12

C1

71 2

AD5

R86

12

This number shows the drawing number.

Rev.B Appendix F-13



MemoryRewrite

BLOCK(8)

BLOCK(7)

BLOCK(12)

A14

A17

D11

D3

D4

A8

A10

A18A19

D8

D2

nFNTCE

A8

D8

D7

A12

A1

A10

A9

D11

A5

A17

D6A6 D5

D12

D10

D15

D3

D13

A6

A19

A8

D0

D6

nWR

A11

A20

D7

A20

D2

A17

D8

D6

A1

D10

A15

A4

nRD

A2

D5

nLCAS

A5

D1D7

nWRD12

D1

A7

nPGMCE

D14

nRD

D9

D10

D15

D0

A9

A16

D13

A3

nRAS2

A7

D5

A2

D15

nHCAS

A4

A18

A4 A10

D14

A21

D0

D3D13

A11

A16

D4

D6

D9

A8

A1

DSWMEM

A3

nRDA4

A9

A14

A12

A11

nFNTCE

nLCAS

A13

A19

A3

nHCAS

A6

D9

A3 A13

A2

D1

A14

A1

A13

D0A7

D8

nPGMCE

A15

D4

A9

D4

nWR

D11

D1

nRD

D2

D2

nRAS2

D12

D9

A21

A7

A15

D3

A18

A12

D7

D12

A5

nWR

A20

A2

A5

D13

D15

D5

D14

D14

A21

D11

A6

A16

D10

nLCAS1

A151

D81

A21

A91

D11

A161

nRD1

A121

D01

nHCAS1

D61

A81

D31

D111

A111

A41

A61

D141D151

A181

nPGMCE1

D41

A31

A191

A201

D91

A141

D131

A101

A11

nWR1

D51

A51

A171

A71

A211

D121

A131

D101

DSWMEM1

nFNTCE1

D21

nRAS21

D71

VIO

VBUS

VBUS

VBUS

VBUS

VBUS

VBUS

C4812

C461 2

R94 1 2

C502 PN

DSW21 2

U7123456789

101112131415161718192021222324 25

2627282930313233343536373839404142434445464748

A15A14A13A12A11A10A9A8A19NC/A20WERESETNCWP/ACCRY/BYA18A17A7A6A5A4A3A2A1 A0

CEVSS1

OED0D8D1D9D2

D10D3

D11VCC

D4D12D5

D13D6

D14D7

D15/A-1VSS2BYTE

A16U8

123456

1516

181920

22 2324252627282930

4041424344

789

10

13

17

3938373635

31

21

1432

VCCD0D1D2D3VCC

WERAS

A0A1A2

VCC VSSA4A5A6A7A8OE

UCAS

D12D13D14D15

VSS

D4D5D6D7

NC

NC

VSSD11D10D9D8

LCAS

A3

NCNC

C4712

R89 1 2

R90

12

C501P N

U9123456789

101112131415161718192021222324 25

2627282930313233343536373839404142434445464748

A15A14A13A12A11A10A9A8A19NC/A20WERESETNCWP/ACCRY/BYA18A17A7A6A5A4A3A2A1 A0

CEVSS1

OED0D8D1D9D2

D10D3

D11VCC

D4D12D5

D13D6

D14D7

D15/A-1VSS2BYTE

A16

R91

12R92 1 2

C4312

R93

12

R95 1 2

C451 2C44

12

Rev.B Appendix F-14



I/F BOARD

SubBoard

PowerSW

A/Cmotor

PFmotor

HEAD

NE

Labelphoto

SwitchBoard

RE

OUTPUT

CLK

S/L

BLOCK(1)

BLOCK(11)

TM-T90 Common & Mecha Driver RootSheet No.20

POWER

Power SW Control

V24IN V24OUT

nOFF_TRGOFF_CTRL

DSW1-1+

DSW1

PSW+PSW-

IF_PWRON

PSW

MECHA SENSOR

Mecha sensor

ARRE

RNE

AC_RST

RNE_S

AC_RST_S

PTLED_COM1 PWR_LED1

RRE_S

CVS CVS_S

PTLED_COM2 PWR_LED2

LRE_SALRE

PF Driver

PF Driver

PF_VR

PF_PH1PF_I10

PF_PH2PF_I20

PF_A+PF_A-

PF_B+

PF_B-

I/F CIRCUIT

Common UIB_IF

HOST_RTSIF_CTS

IF_DETIF_RTSIF_CLKIN/DTRnIF_CLKREQ

IF_SDIF_RD

IF_N25RESIF_DSRRES

CTS

RTS

CLKIN/DTR

nCLK_REQ

TXDRXD

DSR_RES

N25_RES

DET

UIBSEL

IF_HCTS HCTSIF_PWRON

A/C DRIVER

A/C_Driver

AC+AC-

nACOVC

ACM+

ACM-

Logic Power

Logic Power

nIFRST

V24S VIO

VBUS

nRESET

DRAWER KICK DRIVER_1

DK_Driver

DK_S1

GPS24

DK_P

DK_2DK_1

DKDS1

DKD_EN

DKD1DKD2

HEAD DRIVER

HEAD Driver

TH_VH2

TH_VH1

TH_TM1

TH_D1

TH_D2

TH_SCLK

TH_D4TH_D3

TH_LATTH_STB

TH_LATCH

TH_STB_A

TH_DI2

TH_DI1

TH_CLK

TH_DI4

TH_THERMTH_DI3

DK_1

RXD

CTS

DKD2

N25_RES

CLKIN/DTR

DK

_2

DK_S

nCLK_REQ

DK

_S

DKD1

DKDS1

DSR_RES

nERRDIS

RTS

DK

_P

TXD

DK_P

DET

DSW1-1+

nOFF_TRG

OFF_CTRL

SWV24

nIFRST

nRESET

UIBSEL

nTIMO1

nTIMO2

nWDTOUT

V24IN

DSW1

HCTSIF_PWRON

IF_PWRON

nIFRSTEXT_RES

VP

S24

DK_2

DK

_1

PSW+

PSW-

nSPDV24

nSPDV24

nACOVC

nOFF_TRG

nTIMI1

nNMI

nTIMI2

AC_1AC_2

nACOVC

PF_B-

PF_A+PF_A-

VH2

VH1

VH2

VH1

VH1

PWR_LED1

SILAT

PWR_LED1

DSW1

ERROR_LED

CVS_S

SIDAT

POWER_LED

PAPER_LED

SICLK

LRE_S

DSW1-1+

RRE_S

PTLED2

AC_RST AC_RST_S

PWR_LED2

CVS_S

RRE_S

PTLED1 PWR_LED1

ARRELRE_S

RNE

CVS

RNE_S

ALRE

DADATDACLKPF_VR

nERRDIS

VPS24

SV24

RERR_LED

MFS MFS

GPS24

ROUT_LED

RPF_PHA2

RPF_PHB1

PF_VR

RPF_PHA1

RPF_PHB2

PSW

DI12

HRCLK

HRA2

TH_STB

STH

VH2

TH_TM1

VH1

VH2

BI_DI12TH_LACTH

HRDATA

HRA0

HRA3

VH1

HRLD

HRA1

TH_CLKDI34BI_DI34

PWR_LED

GP

S24

GPS24

ACM-

GN

D

ACM+

AC_RST_S

PF_B+

DSW1-1+ 8

CLKIN/DTR 1,4

DSW1-1+8RTS 1,4

nCLK_REQ 1,4

TXD 1,4

DKD1 1,5DKD2 1,5

nRESET 1,3

nERRDIS 5

OFF_CTRL1,8

nTIMO11

SWV241

nTIMO21

nIFRST 3

UIBSEL 1,4

nWDTOUT 1

IF_PWRON4,8

EXT_RES1

nOFF_TRG 1,8

nACOVC 6

nSPDV24 1

DADAT 1DACLK 1

ROUT_LED1

AC_11,6

MFS1

PWR_LED1

SICLK1

RERR_LED1

AC_21,6

SILAT1

HRA11,22

HRA31,22

HRLD1,22

HRA01,22

HRA21,22

HRCLK1,22HRDATA1,22

PTLED11,23PTLED21,23

RXD 1,4

CTS 1,4

DET 1,4

DKDS1 1,5

SV241

N25_RES 1,4

DSR_RES 1,4

nSPDV241

HCTS 1,4

DSW1 8nOFF_TRG1,8

nRESET 1,3

nERRDIS 5

IF_PWRON 4,8

nIFRST 3

nTIMI11

nNMI1

nTIMI21

SIDAT1

nACOVC6

STH1,22

ARRE1,23

CVS1,23

RNE1,23

AC_RST1,23

ALRE1,23

DSW18

PWR_LED123

LRE_S23

CVS_S23

CVS_S 23

RRE_S 23LRE_S 23

AC_RST_S 23

PWR_LED123

PWR_LED1 23

RRE_S23

AC_RST_S23

PF_VR24

RPF_PHB21,24RPF_PHB11,24

PF_VR24

RPF_PHA21,24RPF_PHA11,24

PSW 1,8

V24 VBUS

VIO

VIO

VIO

VIO

VIO

VIO

VIO

VIO

VIO

V24IN V24S

VBUS V24S

VIO

CN4

1234

56789

1234

56789

CN61

23456

7891011

1213141516

1718192021

2223242526

27282930

DK_1

DK_SPGPG

+24V+24V

PGHOST_RTS

CTSDETRTS

CLKIN/DTRCLKREQ

SG+5V

DK_2

DK_GDK_P

PG+24V+24V

PGSGSDRD

HOST_CTS

N25_RESETDSR_RESET

NRESETSG

CN10

12345

6789

10

1112131415

1617181920

2122232425

2627282930

12345

678910

1112131415

1617181920

2122232425

2627282930

QM1

43

5

1 6

2

VIO

1

LED1

AC

VBUS

1

R97 1 2

L1

12

DM2

1

2

34

5

6

C6

12

F1

1 2

C1

12

R17

1 2

R19

1 2

L5031 2

C9

12

V24S

1

C53

12

D2

AC

R14

12

C7

12

R18

12

R6

1 2

R15

12

CN91234

1234

CN13123

123

C50

PN

R16

12

L12

12

Q2

23

1

C49

12

L3

21

43

R5

12

R20

12

R9

1 2

R500 1 2

R41

2

SW1

QM3

4

3

5

2

1

GND

1

R3

12

CN111

21

2

R13

12

C212

R100

12

CN1212

34

12

34

R7

12

VPS24

1

Q500

23

1

C3PN

R8

12

Q1

1

23

D1

12

CH13

12

R1 1 2

R10

1 2

CN7123

45678

910111213

14151617

123

45678

910111213

14151617

L502

12

DM5004

23

1

R501

1 2

+

-U2A

3

21

84

R99 1 2

D500

1 2

R11

12

C8

12

CH14

PN

C4

12

CN8123

45

123

45

U1123

4 5

678

A01A02A03

NC GND

SDASCLVCC

R98 1 2

Page F-16

Page F-17

Page F-18

Page F-16

Page F-17

Page F-20

Page F-19

Page F-20

Note; Non-contiguous numbers are given to the drawing numbers.

Rev.B Appendix F-15


Logic Power Block (Drawing Number 3)

I/F Circuit Block (Drawing Number 4)

VIO

VBUS

nIFRST

nRESET nRESET

QMZ1

43

5

16

2

CZ6

PN

ZDZ1

12

FZ1

1 2

CZ8

12

CZ4

12

UZ2

1234 5

678

NCRESETCONTVIN VOUT

NCGND

CD

CZ5

12

RZ2

12

CZ14

12

RZ1

12

RZ4

12

DZ1

12

CZ12

12

CZ3

12

CZ10

PN

RZ6

1 2

CZ11 2

UZ1

12345

678

GNDSS_INH

OSCOUTVCC

BOOTCOMPFB

CZ7

12

RZ3

12

CZ9

12

CZ15

12CYZ1

1

32

CZ13

12

CZ2

PN

CZ11

12

LZ11 2

RZ5

12

V24S5,8,20

nIFRST 20

nRESET 1,20

VBUS 1,2,20,22,23

VIO 1,2,4,5,6,8,20,23,24

BLOCK(13)

RTS

TXDRXD

N25_RES

CLKIN/DTR

CTSDETCLK_REQ

UIBSEL

DSR_RES

VIO

VIO

VIO

CY1

12

DY2AC

RY15

12

RY10

12

RY20

12

RY22 1 2

RY5 1 2RY6 1 2

RY7 1 2

RY2 1 2

RY8 1 2

CY500

12

RY3 1 2

DMY1

4

23

1

CY501

12

RY9 1 2

RY12 1 2

UY2B53

7 84

UY2A

26

1

84

RY11 1 2

RY23

12

QMY1

43

5

16

2

CY502

12

RY4 1 2

RY19

12

RY181

2

RY21 1 2

RY14

12

RY13

12

RY17

12

RY16

12

CLKIN/DTR 1IF_CLKIN/DTR20

nCLK_REQ 1

RTS 1

TXD 1

UIBSEL 1

HOST_RTS20

IF_RTS20

nIF_CLKREQ20

IF_SD20

CTS 1DET 1

N25_RES 1

RXD 1

HCTS 1

IF_PWRON 8

IF_N25RES20

IF_DET20

IF_DSRRES20

IF_RD20

IF_CTS20

IF_HCTS20

DSR_RES 1

Rev.B Appendix F-16


DK Driver Block (Drawing Number 5)

A/C Driver Block (Drawing Number 6)

DKD1

DK_P

DKDS1

DKD2

DK_2DKD_EN

DK_S1

DK_1

VIO

VIO

V24S

CK4

12

RK5

1 2

QK21

23

QK31

23

RK7

1 2

CK3

12

RK1

12

DK5

AC

RK2

12

RK13

1 2

RK14

1 2

RK16

1 2

DMK1

1

2

3 4

5

6

RK15

1 2

RK6

1 2

QMK1

3

5

2

1

4

QK1

23

1

UK1

2

1 3

G

I O

CK1

12

DKD_EN 20

DKD1 1

DKD2 1

DK_P20

DKDS1 1

DK_220

DK_120

DK_S120

GPS241,2,3,4,6,20,22,23,24

V24

VIO

RA3

12

CA3

12

RA4

1 2

QMA3

3

5

2

1

4

QA1

2

31

QMA2

4

3

5

2

1

DMA14

2 3

1

CA2

12

CA4

12

CA1

12

RA5

12

RMA11234 5

678

QMA1

6

8

2

45

3

10

1

7

9

ACM- 20

ACM+ 20

nACOVC20

AC+1

AC-1

Rev.B Appendix F-17


Power SW Controller Block (Drawing Number 8)

PSW

PSW+

DSW1-1+

V24OUT

DSW1

V24IN

VIO

VIO

VIO

RS111

2

US1A

142 5

3

6

41

14

7

D Q

CLK

Q

PR

CL

VC

CG

ND

RS24

12

QS12

23

1

RS13

12

RS22

12

QMS2

43

5

16

2

RS6

1 2

RS9

12

CS9

12

RS12

12

CS1

PN

CS3

12

RS27

12

RS201

2

QMS4

43

5

16

2

RS16

12

RS10

1 2

CS11

PN

DMS1

1

2

3 4

5

6

DMS6

4

2 3

1

RS2

12

DMS4

1234 5 6

DS1

12

RS1

12

RS7

1 2

QS3

23

1

+

-

US2A

3

21

84

RS21

12

CS2

12

+

-

US2B

5

67

RS18

12

RS28

12

US1B

12 9

11

8

10

13

14

7

D Q

CLK

Q

PR

CL

VC

CG

ND

RS4

1 2

QS2

1

23

RS311 2

CS12

PN

RS301 2

QS14

23

1

RS29

12

RS14

12

CS6

12

RS5

12

CS7

12

DMS5

1234 5 6

RS26

12

RS23

12

RS8

12

+

-U2B

5

67

RS25

12

CS101

2

RS17

12

CS8

PN

CS4

12

CS5

12

QS1

1

23

RS3

12

DMS2

4

2 3

1

DMS34

23

1

DMS7

1

2

3 4

5

6

QMS1

43

5

16

2

RS19

12

IF_PWRON 4

DSW120

DSW1-1+20

PSW-20

PSW+20

V24OUT 3,5,20V24IN20

PSW1

nOFF_TRG 1,20

OFF_CTRL 1

Rev.B Appendix F-18


HEAD Driver Block (Drawing Number 22)

BLOCK(9)

V24

VBUS

VIO

CH7

12

LH2

1 2

RH81 2

CH8

12

CH12

PN

CH6

12

RH15

12

LH7

1 2

RH10

1 2

RH1

1 2

LH6

1 2

CH9

12

VH2

1

RH9

12

CH11

12

CH3

12

RH17

1 2

RH7

12

CH10

PN

RH3

1 2

DMH1

4

23

1

LH1

1 2

RH11

1 2

LH3

1 2

CH5

12

LH8

12

RH13

1 2

RH121

2

LH41 2

RH5

12

LH9

12

RH14

12

RH16

12

CH1

12

CH2

12

RH2

12

RH6

1 2

LH5

1 2

RH4

12

CH4

12

TH_THERM1

TH_VH1 20

TH_DI2 20

TH_DI1 20

TH_CLK 20

TH_LATCH 20

TH_STB 20

TH_DI3 20

TH_DI4 20

TH_D11

TH_D21

TH_SCLK1

TH_STB_A1

TH_LAT1

TH_D31

TH_D41

TH_TM1 20

TH_VH2 20

Rev.B Appendix F-19


MECHA Sensor Block (Drawing Number 23)

PF Driver Block (Drawing Number 24)

BLOCK(10)

VBUSVIO

VIO

RL8 1 2

CL2

12

RL4

12

RL9 1 2

QML1

3

5

2

1

4

RL1

12

CL4

12

RL7 1 2

CL3

12

RL10 1 2

CL1

12

RL11

1 2

RL3

12

RL12

1 2

RL5

12

RL2

12

RL6 1 2

CL5

12

DML1

4

23

1

ARRE1

RNE1

AC_RST1

CVS1

PWR_LED1 20

PWR_LED2 20

ALRE1 LRE_S 20

RRE_S 20

RNE_S 20

AC_RST_S 20

PTLED_COM11

CVS_S 20

PTLED_COM21

PF_PH2

PF_VR

PF_I20 PF_I20

PF_PH2

PF_A-

PF_B+PF_B-

PF_A+

PF_I10

PF_PH1

PF_I10PF_PH1

V24

VIO

VIO

DP6

AC

DP7

AC

REF_PF

1 DP8

AC

CP3

12

CP4

12

RP1

12

RP6

1 2

RP4

1 2

UP2

98

12131415

12

43

567

1110

16

D1D2

G3G4D0

OUTBPFDREF

G1RC

G2VCCPHASE

SENSEOUTA

VBB

CP5

PN

UP1

98

12131415

12

43

567

1110

16

D1D2

G3G4D0

OUTBPFDREF

G1RC

G2VCCPHASE

SENSEOUTA

VBB

CP21

2

RP2

12

RP3

12

DP5

AC

RP5

12

CP1

12

PF_B- 20

PF_A- 20

PF_B+ 20

PF_A+ 20

PF_PH21

PF_VR20

PF_I201

PF_PH11

PF_I101

SEIKO EPSON CORPORATION Printed in JapanEPSON

Confidential Service manual - EPoS Traderssupport.epostraders.co.uk/...TM-L90_ServiceManual.pdf ·...

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Transcript of Confidential Service manual - EPoS Traderssupport.epostraders.co.uk/...TM-L90_ServiceManual.pdf ·...