Epson TM U200D - B/W Dot-matrix Printer, U200PD, TM-U200D, TM-U200PD Technical Manual

U200D/U200PD

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Technical Manual

technical manual

TM-U200D/U200PD

EPSON

English

4005680

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, mechanical, photocopying, recording, or otherwise, without the prior written permission of
Seiko Epson Corporation. No patent liability is assumed with respect to the use of the information contained herein.
While every precaution has been taken in the preparation of this book, 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 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 is a registered trademark of Seiko Epson Corporation.
ESC/POS is a trademark of Seiko Epson Corporation.

NOTICE: The contents of this manual are subject to change without notice.

Copyright © 1997 by Seiko Epson Corporation, Nagano, Japan.

EPSON

SEIKO EPSON CORPORATION

Printed in Japan E9608130-0000SE

TM-U200D/U200PD Technical Manual

FCC CLASS A

FCC Compliance Statement

For American Users

This equipment has been tested and foun d to compl y with th e limits for a C lass A di gital d evice, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment.

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instructi on m anu al, may cau se harmful interfere nce to rad io co mmunic ati ons . Op erati on of t his e quipm ent in
a residential area is likely to cause harmful interference, in which case the user will be required to correct the
interference at his own expense.

WARNING

The connection of a non-shielded printer interface cable to this printer will invalidate the FCC Verification of this
device and may cause interference levels which exceed the limits established by the FCC for this equipment.

You are cautioned that changes or modification s not expressly approved by the par ty respon sible for complianc e could
void your authority to operate the equipment.

FOR CANADI AN USERS

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in
the radio interference regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de Class A prescrites dans le règlement sur le brouillage radioélectrique édicté par le Ministère des
Communications du Canada.

GEREÄUSCHPEGEL

Gemäß der Dritten Verordr ung zum Ge rät esiche rheitsgec setz (M asc hinenl ärmi nformati ons- Vero rdnung-3. GSG V) is t
der arbeitsplatzbezogene Geräusch-Emissionswert kleiner als 70 dB(A) (basierend auf ISO 7779).

Rev. B i

Introduction

The TM-U200D and TM-U200PD are one-station printers for ECR and POS use which can be used for printing the
results of weighing or measuring.

The main features of the TM-U200D and TM-U200PD printers are the following:

❏ High-speed printing through logic-seeking control
❏ Excellent reliability and long life due t o use of two stepping mot ors, one for mo ving the carri age and one for pape r

feeding

❏ Flexible paper feed setting permits printing in accordance with any user-defined format
❏ Command protocol based on ESC/POS, a widely used standard
❏ Built-in drawer kick-out interface provides capability to drive two drawers
❏ Selectable character fonts (7 x 9, 9 x 9)
❏ Semi-automatic paper loading capability
❏ AC adapter (included) provides compact power supply
❏ Compact and light in weight
❏ Automatic Status Back (ASB) function to automatically send printer status changes.
❏ Two-color printing. Black and red colors are selectable. (2-color Print Version only)

ii Rev. B

Notes and Cautions

Note:

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

CAUTION:

Cautions must be observed to avoid dama ge to your equipment.

Rev. B iii

Revision Sheet

Revision Page Altered Item and Contents

Rev. B All Added information of the 2-color Print Version

iv Rev. B

TM-U200D/U200PD Technical Manual

Chapter 1 Features and General Specifications

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Character Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Paper Roll Supply Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Receive Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

External Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Safety and EMI Standards Applied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Printer Installation Stance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Main Unit Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Motor, Paper Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Motor, Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Print Head Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Detector Sub-ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Paper Detector Switch Sub-ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Near-end Detector (N.E.-U200); (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Power Supply Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Drawer Kick-Out Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

RS-232 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Interface Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

RS-485 Serial Interface (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

IEEE 1284 Parallel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Reverse Mode (Data Transmission from Printer to Host) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Interface Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Buttons and Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Panel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Performing the Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Error Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Printer Operation When an Error Occurs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Data Receive Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Buffer Full Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Detectors and Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

Hexadecimal Dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

Hexadecimal Dump Function 1-29

Performing a Hexadecimal Dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

External Power Supply PS-170 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

Rev. B -1

Chapter 2 Mechanism Configuration and Operating Principles

Printer Mechanism Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Print mechanism unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Print head unit movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Wire movement when a single dot is printed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Printing a character (9x9 font) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Paper Feed Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Paper loading (semi-automatic loading) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Paper feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Ribbon Feed Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Ribbon feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Detection Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9

Home position detection mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Paper detection mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Near-end detection mechanism (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Ribbon Switch Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Switching from Black to Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11

Releasing from Red to Black . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11

Electrical Circuitry Operating Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16

Power Supply Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16

Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18

Various detector circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22

Host interface circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23

Drawer kick-out drive circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

DIP switch read circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24

Printer Mechanism Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

Print head drive circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

Chapter 3 Handling and Maintenance

Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Storage Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Use Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Paper Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Ribbon Cassette Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Replacing the Paper Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Replacing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Removing Jammed Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Using the Power switch cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Periodic Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Lubrication Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

-2 Rev.B

TM-U200D/U200PD Technical Manual

Chapter 4 Troubleshooting

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Initiating the Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Self-test Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Ending the Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Troubleshooting Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Error Types and Countermeasures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Chapter 5 Disasse mbly, Assembly, and Adjustment

Small Part Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Removing the fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Sub-assembly A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Frame, paper feed unit ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Main Assembly 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Lever, ribbon switch , Spring, ribbon release , Lever, ribbon release , Gear, ribbon intermediate,

Gear, ribbon transmission , Ribbon take-up ass’y , and Plate, ribbon drive ass’y. . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Main Assembly 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Tension plate ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Main Assembly 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Frame, paper feed ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Main Assembly 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Motor, carriage ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Main Assembly 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Carriage sub-ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Main Assembly 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Shaft, carriage ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Main Assembly 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

Shaft holder, adjusting roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

Main Assembly 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Shaft, carriage guide ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Main Assembly 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Spring, belt tension ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Main Assembly 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Detector sub-ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Main Assembly 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Radiating plate, carriage motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Main Assembly 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

FFC, print head ass’y ( Single-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

FPC, print head ass’y (2-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Main Assembly 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Print head ground plate and Print head unit (Single-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Print head unit (2-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Main Assembly 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23

Fame, ribbon knob and Frame, ribbon ass’y (Single-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23

Main assembly 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Fixing plate, cover, left and Fixing plate, cover, right (2-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Main Assembly 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

Earth plate, ribbon frame (2-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

Main Assembly 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26

Frame, ribbon ass’y, Spring, ribbon frame and Fixing plate, ribbon frame (2-color Print Version only) . . . . . . 5-26

Main Assembly 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27

Thumb-screw and Cover, head (2-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27

Main Assembly 1 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28

Rev. B -3

Plate, cutter, lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28

Main Assembly 2 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29

Plate, upper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29

Main Assembly 3 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30

Main circuit board ass’y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30

Main Assembly 4 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32

Inserting the cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32

Main Assembly 5 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32

Case, lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32

Main Assembly 6 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34

Manual cutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34

Main Assembly 7 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35

Paper roll receive rollers, Case, upper, Roller, guide and Switch panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35

Main Assembly 8 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37

Interface circuit board ass’y and Connector plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37

Main Assembly 9 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38

Plate, lower, Cover, ROM, and Rubber foot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38

Main Assembly 10 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40

Caution seal AB (Single-color Print Version only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-40

Main Assembly 11 (Case Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41

Cover, main and Hinge ass’y (There are two type printers, which are either with or without the

Hinge ass’y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-41

Near-end detector ass’y(N.E-U200); (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-43

Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-45

Platen gap adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45

Appendix

RS-485 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

XON/XOFF Transmit Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Data Format When Using RS-485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Main Circuit Board A Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Main Circuit Board C Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

RS-232 Serial Interface Circuit Board Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8

IEEE 1284 Parallel Interface Circuit Board Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

RS-485 Serial Interface Circuit Board Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Main Circuit Board C Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12

RS-232 Serial Interface Circuit Board Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13

IEEE 1284 Parallel Interface Circuit Board Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14

RS-485 Serial Interface Circuit Board Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15

Printer Mechanism Unit Overall Exploded Diagram (Single-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16

Printer Mechanism Unit Overall Exploded Diagram (2-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17

Case Unit Overall Exploded Diagram (Single-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-18

Case Unit Overall Exploded Diagram (2-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19

Printer Mechanism Unit Lubrication Points Diagram (Single-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . A-20

Case Unit Lubrication Points Diagram (2-color Print Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-21

Case Unit Lubrication Points Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-22

-4 Rev.B

Rev. B Features and General Specifications 1-1

TM-U200D/U200PD Technical Manual

Chapter 1

Features and General Specifications

Figure 1-1 TM-U200D/U200PD appearance

POWER LED

Power switch

PAPER OUT LED

ERROR LED

FEED button

(PAPER OUT/PRESS FEED)

DIP switches

Power supply connector

Drawer kick-out conne cto r

Frame ground screw

Frame ground screw

Interface connector

P-ROM

1-2 Features and General Specifications Rev.B

Features

Printing Specifications

NOTE:If the printing duty ratio is too high, the operation of the print head is stopped by the duty limit. In such

circumstances, the printing speeds shown above cannot be guranteed.

When select red-color or 2-colors(b lack and red) printing, the printing speed g oe s dow n co mpa red with
black-color printing. It is caused by the switching operation in the printer.

Printing method : S erial impact dot-matrix
Head wire configuration: 9-pin serial type

Figure 1-2 Dot configuration

Dot pitch: 0.353 mm (1/72")
Dot wire diameter 0.29 mm (0.01")
Printing direction: Bidirectional logic seeking
Printing width: 63.34 mm (2.49")
Line feed: 4.23 mm (1/6"): default setting

Programmable in units of 1/144 inch by using commands.

Paper feed method Friction feed
Paper feed speed: Approximately 4.17 inches/second (25 lines/second) during

continuous paper feeding

Characters per line: See the table in the next page.
Characters per inch: See the table in the next page.
Total dot count (horizontal

direction)

7 x 9 font: 400 half-dot positions per line
9 x 9 font: 400 half-dot positions per line

Printing speed Approximately 3.5 lines/second (40 columns, 16 CPI)

Approximately 6.4 lines/second (16 columns, 16 CPI)

0.29 mm (0.01")

(wire diameter)

0.317 mm (0.012")

0.353 mm
(0.014")

Rev. B Features and General Specifications 1-3

TM-U200D/U200PD Technical Manual

CPI = Characters per inch

Character dimensions, characters per inch, characters per line

NOTE: The default font is 7 x 9; the dot spacing between characters is either 3 half dots or 2 half dots depending

on the setting of DIP switch 2-1.

2color printing. Black and red colors are selectable. (2-color Print Version only)

Character Specifications

Character Structure

Horizontal x Vert i cal

Character

Structure

Character Set

Character

Dimensions

WxH

Dot Spacing

Between

Characters

Characters Per

Line (CPL)

Characters Per

Inch (CPI)

7 x 9

ANK

1.2 x 3.1 mm
(.047 x .122")

3 half-dots 40 16

Graphics

1.7 x 3.1 mm
(.070 x .122")

04016

9 x 9

ANK

1.6 x 3.1 mm
(.063 x .122")

3 half-dots 33 13.3

Graphics

2.0 x 3.1 mm
(.079 x .122")

0 33 13.3

7 x 9

ANK

1.2 x 3.1 mm
(.047 x .122")

2 half-dots 42 17.8

Graphics

1.6 x 3.1 mm
(.063 x .122")

0 42 17.8

9 x 9

ANK

1.6 x 3.1 mm
(.063 x .122")

2 half-dots 35 14.5

Graphics

1.9 x 3.1 mm
(.075 x .122")

0 35 14.5

Character set:

Alphanumeric: 95
Internat ional: 32
Graphics: 128 x 8 pages

Character structure:

7 x 9 with 400 half-dot positions per line
9 x 9 with 400 half-dot positions per line

1-4 Features and General Specifications Rev.B

Figure 1-3 Character size (7 x 9 font example)

3.1 mm
(0.122")

2.4 mm
(0.094")

1.24 mm (0.049")

1.59 mm (0.063")

0.353 mm
(0.014")

Rev. B Features and General Specifications 1-5

TM-U200D/U200PD Technical Manual

Paper

Paper types: Paper roll: Plain paper

Pressure-sensitive paper

Paper roll width: 76 ± 0.5 mm (2.99 ± .020")
Paper roll maximum

diameter:

83 mm (3.27")

Paper roll core: Unless there is an optional near-end detector, you cannot use a

paper roll where the core and the paper are glued together.

Normal paper: Thickness: 1 sheet: 0.06 to 0.085 mm (.0024 to .0034")

Weight: 52.3 to 64 g/m

2

(13.9 to 17 lbs) (45 to 55 kg/

1000sheets/1091 x 788)

Pressure-sensitive paper Original 1 sheet + up to two copy sheets

Thickness: 1 sheet: 0.05 to 0.08 mm (.0020 to .0031")

Total thickness: 0.2 mm (.0079") or less
Recommended paper: Mitsubishi - Carbonless paper (blue)
Top and middle sheets: N40Hi (paper thickness: 0.06 mm [.0024"],

weight: 47.2 g/m

2

[12.6 lbs])

Bottom sheet: N60 (paper thickness: 0.08 mm [.0031"],

weight: 68.0 g/m

2

[18.1 lbs])

Copy capability and
ambient temperature for
printing:

Copying capability is influenced by the ambient temperature.
Printing must be performed under these conditions:

Original + 1 copy: 5° to 50° C (50° to 104° F)
Original + 2 copies: 10° to 40° C (41° to 122° F)

1-6 Features and General Specifications Rev.B

(*1) This dimension shows the distance from the manual cutter to the printing position.
(*2) The values shown for the printing area are the values calculated (between dot centers) according to the wire

diameter (0.29 mm [.011

"

]).

Paper Roll Supply Device

Receive Buffer

Either 1 KB or 40 bytes selectable by DIP switches.

Figure 1-4 Printing area

Supply device:

Drop-in loading

Maximum of 200 dots, 400 positions

76 mm (2.99")

20.2 mm (0.79") (*1)

Cutting position (manual cutter)

6.76 mm (0.27")

(*2)

63.34 mm (2.49")

5.9 mm (0.23")

Rev. B Features and General Specifications 1-7

TM-U200D/U200PD Technical Manual

Electrical Specifications

Ribbon Cassette

Ribbon cassette specifications

(*1) The ribbon life is based on the following conditions:

Character font: 7 x 9 font (with descenders)
Printing pattern: ASCII 96-character rolling pattern. Refer to the specification published by EPSON for the

printing pattern example.

NOTE: Malfun ctions and other problems may occur if other than t he specified ri bbon cassette is used.

Power supply: One of the following five AC adapters is included, depending on

the specifications:

AC adapter specifications

Power consumption
(except when driving
drawer kick-out):

Mean: Average 43 W
Stand-by: Average 6 W

Model number Color Ribbon life (*1)

ERC-38 (P) Purple 4 million chara c ters (under contin uous printing at 2 5 ° C [7 7 ° F] )
ERC-38 (B) Black 3 m ill ion characters (u nder continuous printing at 25° C [7 7° F])

ERC-38 (B/R)

Black and
Red

Black: 1.5 million characters (under conti nuo us p rinting at 25° C [77° F])
Red : 750,000 characters (under continuous printing at 25° C [77° F])

Settings and
shipment

Input voltage range

Model
name

Japan 100V ± 10% 50/60 Hz PA-6508
North America 120V ± 10% 60 Hz PB-6509
Europe (Germany) 230V ± 10% 50 Hz PB-6510
Europe (U.K) 230V ± 10% 50 Hz PA-6511
Australia 140V ± 10% 50 Hz PA-6513

1-8 Features and General Specifications Rev.B

External Dimensions and Weight

Environmental Specifications

Height: 133 mm (5.19")
Width: 160 mm (6.25")
Depth: 248 mm (5.04")
Weight: Approximately 2.2 kg (4.85 lbs)
Color: EPSON standard gray.

Temperature: Operating: 0° to 50° C (32° to 122° F)

At 34° C (93° F) or higher, there are humidity restrictions;
please see the figure below.

Storage: -10° to 50° C (14° to 122° F) (except paper and ribbon)

Humidity: Operating: 10% to 90% RH (non-condensing)

Storage: 10% to 90% RH (non-condensing, except paper and ribbon)

Figure 1-5 Operating temperature and humidity range

Vibration resistance: When packed:

Frequency: 5 to 55 Hz
Acceleration: 2 G
Sweep: 10 minutes (half cycle)
Duration: 1 hour
Directions: x, y, and z

Operating Temperature Range

40 C, 65%

34 C, 90%

50 C, 35%

80

60

40

20

0

0

10 20 30

40

Environment Temperature [C]

Relative Humidity [%RH]

50

90

10

Rev. B Features and General Specifications 1-9

TM-U200D/U200PD Technical Manual

Reliability

Safety and EMI Standards Applied

(EMC is measured with the packaged AC adapter)

Printer Installation Stance

Install the printer horizontally.

The printer must also be installed so that it d oes not move or vibr ate duri ng paper cutting or the
drawer kick-out operation.

Fastening tape is available as an option.

Impact resistance: When packed:

Package: EPSON standard package
Height: 60 cm (23.62")
Directions: 1 corner, 3 edges, and 6 surfaces

When unpacked:

Height: 5 cm (1.97")
Directions: Lift one edge and release it (for all 4 edges).

Printer mechanism:
MCBF: 5,000,000 lines (excluding the print head)
Life: Approximately 7,500,000 lines (The printer is defined to have

reached the end of its life when it cannot function property
because of the main parts [motors, solenoids, frames, shafts, etc.]
wearing out.)

Print head life: 100,000,000 characters (when printing an average of two dots/

wire/character)

For Europe: CE Marking: EN55022, EN50082-1, EN45501

Safety standards: TÜV

For USA: EMI: FCC class A

Safety standards: UL1950-2TH-D3
C-UL

For Japan: EMI: VCCI Class 1

1-10 Features and General Specifications Rev.B

Hardware Configuration

Figure 1-6 TM-U200D/U200PD main unit configuration

Motor, carriage

Motor, paper feed

Paper detector

Print head unit

Detector sub-ass’y

switch sub-ass’y

Paper roll near-end detector(N.E-U200); (optional)

Main circuit board

Interface circuit board

Rev. B Features and General Specifications 1-11

TM-U200D/U200PD Technical Manual

Main Unit Specifications

Motor, Paper Feed

Motor, Carriage

Print Head Unit

Detector Sub-ass’y

Type: 4-phase, PM type stepping motor
Drive voltage: 24V DC ± 10%
Winding resistance: 58 Ω ± 2.9 Ω at 25° C (77° F), per phase
Current consumption: Peak: 1.1 A in worst case

Average: 200 mA at 24V DC, 25° C (77° F), 600 pps

350 mA maximum

Type: 4-phase, PM type stepping motor
Drive voltage: 24V DC ± 10%
Winding resistance: 39.5 Ω ± 1.9 Ω at 25° C (77° F), per phase
Current consumption: Peak: 1.5 A maximum

Average: 400 mA at 24V DC, 25° C (77° F), 952 pps

600 mA maximum

Solenoid number: 9
Winding resistance 15.6 Ω ± 5 % at 25° C (77° F), per phase
Drive voltage: 24V DC ± 10%

Type: Photo sensor
Voltage: 5V DC ± 5%
Output level: Low when the carriage home position is detected

1-12 Features and General Specifications Rev.B

Paper Detector Switch Sub-ass’y

Near-end Detector (N.E.-U200); (Optional)

Connectors

Figure 1-7 Connector panel (serial interface)

Figure 1-8 Connector panel (parallel interface)

Interface Connector

See the interface section.

Type: Microswitch
Voltage: 5V DC ± 5%
Output level: High when paper end is detected

Type: Microswitch
Voltage: 5V DC ± 5%
Output level: Low when a paper near-end is detected

Frame ground screw

Interface connector

Frame ground screw

Drawer kick-out

Power supply

connector

connector

Interface connector

Drawer kick-out
connector

Power suppl
connector

Frame ground

screw

Frame ground

screw

Rev. B Features and General Specifications 1-13

TM-U200D/U200PD Technical Manual

Power Supply Connector

This connector is used to connect the printer to an external power source.

NOTE: Be sure to ground the frame ground (FG) screw on the board at the bottom of the unit. Ground wire terminal

hole diameter: 3.2mm (.13"). Ground wire thickness: AWG 18 or equivalent.

Drawer Kick-Out Connector

A pulse specified by the ESC p command is output to the drawer kick-out connector. The host
can confirm the status of the input signal by using the GS a, GS r, or DLE EOT commands.

(*1) Drawer open/close signal

The host computer can check the drawer open/close status with the DLE EOT, GS a, and GS r
commands.

Pin assignments: See the table below.
Model (printer side): Hosiden TCS7960-532010 (or equivalent)

Power supply connector pin assignments

Pin Number Signal Name

1 +30V DC unregulated
2GND
3NC
Shell Frame GND

Drawer kick-out connector pin assignments

Pin Number Signal name Direction

1Frame GND ­2 Drawer kick-out drive signal 1(*2) Output
3 Drawer open/close signal (*1) Input
4 +24V DC ­5 Drawer kick-out drive signal 2 (*2) Output
6 Signal GND -

Input signal level: LOW = 0 V

HIGH = 2 to 5V (at connector pin 3)

1-14 Features and General Specifications Rev.B

(*2) Drawer kick-out drive signal

CAUTION:

To avoid an overcurrent, the resistance of the drawer kick-out solenoid must be 24 Ω or
more.

NOTES:

❏ Two driver transistors cann ot be energized s imultaneously.
❏ The drawer drive duty must be as shown below:

❏ Be sure to use the printer power supply (connector pin 4) for the drawer power source.

Output signal: Voltage = Approximately 24V DC

Current = 1 A or less

Output waveform: Outputs the waveforms in Figure 1-8 to pins

2 and 5 of the connector. t1 (ON time) and t2
(OFF time) are specified by

ESC p

.

Figure 1-9 Drawer kick-out drive signal output waveform

t1 x 2 ms

t2 x 2 ms

ON time

(ON time + OFF time)

≤

0.2

Rev. B Features and General Specifications 1-15

TM-U200D/U200PD Technical Manual

Interface

RS-232 Serial Interface

NOTES:

❏ Handshaking, data word length, baud rate, and parity depend on DIP switch settings.
❏ Data transmitted from the printe r has 1 stop bit (fixed).

Data transmission: Serial (compa tible with RS-232 )

Synchronization: Asynchronous

Handshaking: DTR/DSR or XON/XOFF control

Signal levels: MARK = -3 to -15 V: Logic 1/OFF

SPACE = +3 to +15 V: Logic 0/ON

Baud rates: 4800, 9600 bps

Data word le ngths: 7 or 8 bits

Parity settings: None, even, odd

Stop bits: 1 or more

Connector: Female D-SUB 25-pin connector

1-16 Features and General Specifications Rev.B

Interface Connector Pin Assignments

TM-U200D printer status and signals

Pin number Signal name I/O Function

1FG-Frame ground
2 TXD O Transmit data
3 RXD I Receive data
4 RTS O Same as the DTR signal
6 DSR I This signal indicates whether the host compu ter can rec eive dat a.

SPACE indicates that the host computer can receive data, and MARK indicates
that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after confirming this
signal (except when transmitting data by DLE EOT and GS a).
When XON/XOFF control is selected , the pri nt er do es not check t hi s signal.
Changing the DIP switch setting enables this signal to be used as a reset signal
for the printer.

The printer is reset when the signal remains MARK for 1 ms or more.
7 SG - Si gnal ground
20 DTR O 1) When DTR/DSR control is selected, this signal indicates whether the printer is

busy. SPACE indicates that the printer is ready to receive data, and MARK

indicates that the printer is busy. The busy condition can be changed by using

DIP SW 1-8 as follows:

20 DTR O 2) When XON/XOFF co n tro l is sel ec t ed :

This signal indicates whether the printer is correctly connected and is ready to

receive data. SPACE indicates that the printer is ready to receive data. The

signal is always SPACE except in the following cases:

❏ During the period after the power is turned on until the printer is ready to

receive data.

❏ During the self test.
25 INIT I Changing the DIP switch setting enables this signal to be used as a reset signal

for the printer (see the DIP switch settings in the “Buttons and Switches” section

of this chapter). The printer is reset when the signal remains SPACE for 1 ms or

more.

Printer

DIP SW 1-8 status
ON OFF

1. During the period from when the power is turned on
(including resetting using the interface) to when the
printer is ready to receive data.

BUSY BUSY

2. During the self-test BUSY BUSY

3. During paper feeding using the paper feed button. - BUSY

4. When the printer stops printing due to a paper-end. - BUSY

5. When an error has occurred. - BUSY

6. When a temporary abnormality occurs in the

power supply voltage

-BUSY

7. When the receive buffer becomes full. (*1) BUSY BUSY

Off-line

Rev. B Features and General Specifications 1-17

TM-U200D/U200PD Technical Manual

NOTES:

❏ When the remaining space in the receive buffer is 16 bytes, the printer becomes buffer-full. This status continues

until the space in the receive buffer increases to 32 bytes.

❏ The printer ignores the data received when the rem ain in g space in the recei ve buffer is 0 bytes.

On-line/Off-line switching

The printer does not have an on-line/off-line button. The printer goes off-line under the
following conditions:

❏

Between the time when the power is turned on (including reset using the interface) and
when the printer is ready to receive data.

❏

During the self-test.

❏

During pa per feeding using the PAPER FEED button.

❏

Between the time when the printer stops printing due to a paper-end and when the on-line
recovery wait time finishes after loading paper (in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt feature set enabled due to paper shortage by ESC c 4).

❏

When an error has occurred.

XON/XOFF transmit timing

When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows.

(*1) XON is not transmitted when the receive buffer is full.
(*2) XOFF is not transmitted when the receive buffer is full.

NOTE: The XON code is <11>H and the XOFF code is <13>H.

Printer status

DIP SW 1-8 stat us
ON OFF

XON
transmission

• When the printer goes on line after turning on th e pow er or
reset using interface.

• When the receive buffer is released from the buffer full state.

• When the printer switches from off line to on line (*1).

• When the printer recovers from an error through a command.

Transmission
Transmission

----

----

Transmission

Transmission
Transmission
Transmission
Transmission
Transmission

XOFF
transmission

• During an error condition

• When the receive buffer becomes full (*2).

Transmission

----

Transmission
Transmission

1-18 Features and General Specifications Rev.B

Serial interface connection example

NOTES:

❏ Set the handshaking so that the transmit data can be received.
❏ Transmit data to the printer after turning on the power and initializing the printer.

RS-485 Serial Interface (option)

Refer to the Appendix for details.

IEEE 1284 Parallel Interface

Copyright (C) 1994 by the Institute of electrical and Electronic Engineers, Inc.

Specification

Data transmission: 8-bit parallel

Synchronization: Externally supplied nStrobe signals

Handshaking: nAck and Busy signals

Signal levels: TTL compatible

Connector: 57RE-40360-830B (DDK) or equivalent (IEEE 1284 Type B)

Reverse communication (Printer Host): Nibble or Byte Mode

Reverse Mode (Data Transmission from Printer to Host)

The STATUS data transmission from the printer to the host is proceeded in the Nibble or Byte
mode.

This mode allows data transmission from the asynchronous printer under the control of the
host.
Data transmissions in the Nibble Mode are made via the existing c ontrol lines in unists of four
bits (Nibble). In the Byte Mod e, data transmissions are proceeded by making the eight-bit data
lines bidirectional.

Host

Printer

TXD
DSR
CTS
RXD
DTR
FG
SG

RXD
DTR
RTS
TXD
DSR
FG
SG

Rev. B Features and General Specifications 1-19

TM-U200D/U200PD Technical Manual

The both modes fail to be proceeded concurrently with the Compa tibility Mode, ther eby causing
half duplex transmission.
The IEEE 1284 Nibble/Byte Modes are under development in the form of draft and may be
subject to change.

1-20 Features and General Specifications Rev.B

Interface Connector Pin Assignments

TM-U200PD printer status and signals

NOTES:

❏ A prefix "n" to signal names refers to "L" active signals. To the host provided with none of the sig nal lin es listed

above, both-w ay communication fails .

❏ For interfacing, signal l ines shall use twisted pair cables with the return sides connected to signal ground level.
❏ Interfacing conditions shall be all based on the TTL level to meet the characteristics described below. In addition,

both rise time and fall time of each signal shall be 0.5Js or less.

❏ Data transmission shall not ignore the signal nAck or Busy. An attempt to transmit data with either signal, nAck or

Busy, ignored can cause lost data. (Data transmissions to the printer shall be made after verifying the nAck signal
or while the Busy signal is at the "L" level.)

❏ Interface cables shall be as minimum requ ired sho rt in leng th as po ssibl e.

NC: No Connect
ND: No Defined

Pin number Source Compatibility Mode Nibble Mode Byte Mode

1 Host nStrobe HostClk HostClk
2 Host/Ptr Data0(LSB) Data0(LSB) Data0(LSB)
3 Host/Ptr Data1 Data1 Data1
4 Host/Ptr Data2 Data2 Data2
5 Host/Ptr Data3 Data3 Data3
6 Host/Ptr Data4 Data4 Data4
7 Host/Ptr Data5 Data5 Data5
8 Host/Ptr Data6 Data6 Data6
9 Host/Ptr Data7(MSB) Data7(MSB) Data7(MSB)
10 Printer nAck PtrClk PtrClk
11 Printer Busy PtrBusy/Data3,7 PtrBusy

12 printer PError

AckDataReq/
Data2,6

AckDataReq

13 Printer Select Xflag/Dat a1,5 Xflag
14 Hostr nAutoFd HostBusy HostBusy
15 NC ND ND
16 GND GND GND
17 FG FG FG
18 Printer Logic-H Logic-H Logic-H
19-30 GND GND GND
31 Host nInit nInit nInit
32 Printer nFault nDataAvail/Data0,4 nDataAvail
33 GND ND ND
34 Printer DK_STATUS ND ND
35 Printer +5V ND ND
36 Host nSelectIn 1284-Active 1284-Active

Rev. B Features and General Specifications 1-21

TM-U200D/U200PD Technical Manual

Switching between on-line and off-line

The printer is not equipped with any on-line/off-line switch. The printer is placed into off-line
status in either of the followings:

❏ When the power is turned on or until the printer becomes ready for data transmission after it

is initialized by the reset sign al (nInit) from the interface.

❏ In the process of self-test.
❏ In the process of paper feeding using the paper feed switch.
❏ Between the time when the printer stops printing due to a paper-end and when the on-line

recovery wait time finishes after loading paper. (in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt feature set enabled due to paper shortage by ESC c 4).

❏ When an error has occurred.

Reception of status from the printer through the bid ire ctional parallel interface

In the bidirectional parallel interface specifications, the printer status transmission is available
by using the both-way communicati on facility in the Ni bble/By te Modes in acco rdance wi th the
IEEE 1284.
In this case, different from in the RS-232 serial interface specifications, the real-time
interruptions from the printe r to the host are disabled and thus precau tions must be tak en to the
followings.

❏ Allowable capacity of the printer internal buffer is 100 bytes (except ASB status). The status

signals exceeding this capacity will be discarded. To prevent possible loss of status, the host
shall be ready for data acception (Reverse Mode).

❏ When ASB is used, the host is preferably in the wait state for data acception (Reverse Idle

Mode). When this state is not available, the host shall enter the Reverse Mode to always
monitor the presence of data.

❏ When ASB is used, preference shall be given to the ASB status for transmission over the

other status signals. Any accumulated ASB status signals left for transmission from the last
to the newest ASB status transmission shall be transmitted together at a time as one ASB
status showing the presence of change, followed by the lastest ASB status.

Example: In the normal (wait) state, the ASB status is configured as follows:

When a sequence of operations are proceeded, the PAPER FEED button is pressed and released,
the following pieces of data are accumulated.

First Status Second Status Third Status Fourth Status
0001 0000 0000 0000 0000 0000 0000 0000

1-22 Features and General Specifications Rev.B

When the ASB status is received following this, a total of eight (8) bytes of ASB will be
transmitted as follows:
Accumulated ASB (

➀+➁+➂)

Notes on setting DIP switc h 1-8 to ON

The printer mechanism stops but does not become busy when an error has occurred, printing
stops due to a paper end, or paper is fed using the FEED button.

When setting DIP switch 1-8 to ON to enable handshaking with the print e r, be sure to chec k the
printer status with GS a and ASB function. In this setting, the default value of n for GS a is 2.
The printer automatically transmits the printer status, depending on on-line/off-line changes.

When using DLE EOT and DLE ENQ, be sure that the receive buffer does not become full.

❏

When using a host that cannot transmit d ata when the p ri nter is busy and if an er ror occu rs,
DLE EOT and DLE ENQ cannot be used when printer is busy due to receive buffer-full
state.

❏

If the host can transmit data when the printer is busy and, the receive buffer becomes full
while the host is sending bit-image data, a DLE EOT or D LE ENQ command used while
sending bit-image data is processed as bit-image data, not as a command. Secondly, any
data transmitted when the receive buffer is full may be lost.

Example: Check the printer status using GS r after tr ansmit ti ng each line of data and use the 1K
byte receive buffer. Transmit one line of data so that the receive buffer does not become full.

First Stat us Second Status Third Status Fourth Status

➀ 0001 0000 0000 0000 0000 0000 0000 0000

Near end
detection

➁ 0101 1000 0000 0000 0000 0011 0000 0000

FEED button is
pressed

➂ 0001 0000 0000 0000 0000 0011 0000 0000

FEED button is
released

First Status Second Status Third Status Fourth Status

Accumulated ASB (➀

+➁+➂) 0101 0000 0000 0000 0000 0000 0000 0000

+ First Status Second Status Third Status Fourth Status
The latest ASB (➂)

Fourth Status

0001 0000 0000 0000 0000 0000 0000 0000

Rev. B Features and General Specifications 1-23

TM-U200D/U200PD Technical Manual

Buttons and Switches

Power Switch

Note:

Turn on the power only after connecting the power supply.
RAM is completely initialized when the printer is turned off using the power switch.

Panel Button

The panel button is enabled or disabled by the ESC c 5 command. This button is inactive if it is
disabled.

Note:

The ESC c 5 command enables or disables the panel button. When disabled, the button will not
function. However, when loading a paper roll, you can feed paper with the FEED button during the
paper loading waiting time if the paper loading waiting time is set by GS z 0. Press the FEED
button again after the PAPER OUT LED starts blinking to return the printer to the on-line state.

Type: See-saw type
Function: The power switch turns the power on or off.

Feed (FEED) button: Type: Non-locking push button

Function: Feeds paper based on the line feed amount set by ESC 2

and ESC 3.

1-24 Features and General Specifications Rev.B

DIP Switches

Serial interface (RS-232 an d RS -485 (option))

The DIP switches of are located at the bottom of the case.

NOTES:

❏ Changes in DIP switc h setti ng s (ex cluding switche s 2-3 and 2- 4, whi c h ar e I/F reset signals) are recognized on ly

when the printer power is turned on or reset usin g the in t erface . If the DIP swit ch setting is cha nged afte r the
printer power is turned on, the change does not take effect until the printer is turned on again or reset.

❏ Do not change the settings of DIP switches 2-3 and 2-4 when the printer power is on.

Parallel interface (IEEE 1284)

The DIP switches of are located at the bottom of the case.

DIP switch 1

DIP Switch Function ON OFF

1 Data receive error Ignored Prints “?”
2 Receive buffer capacity Data buffer 40 bytes Data buffer 1 KB
3 Handshaking XON/XOFF DTR/DSR
4 Data word length 7 bits 8 bits
5 Parity check Yes No
6 Parity selection Even Odd
7 Baud rate selection 4800 bps 9600 bps

8 Busy condition When the receive buffer is full

When the receive buffer is full
at an off-line status

DIP switch 2

DIP Switch Function ON OFF

1

Selects spacing between characters. See
the table on page 1-3 for the number of
characters per line for each setting.

2 half dots 3 half dots

2

For internal use only

Setting must not be changed. (Fixed to OFF.)
3 I/F pin 6 reset signal Enabled Disabled
4 I/F pin 25 reset signal Enabled Disabled

DIP switch 1

DIP Switch Function ON OFF

1 Auto line feed Enabled D isabled
2 Receive buffer 40 bytes Approximately 1K byte

3-7 Undefined

8 Busy condition

Receive buffer-full
Scanning data

Off-line
Receive buffer-full
Scanning da ta

Rev. B Features and General Specifications 1-25

TM-U200D/U200PD Technical Manual

.

NOTES:

❏ Do not change the setting of DIP switch 2-2 (fixed to OFF).
❏ Changes in DIP swit ch settings (excludin g sw itch 2-4, which is I/F reset signal) are recognized only wh en the

printer power is turned on or reset using the interface. If the DIP switch settings are changed after the printer
power is turned on, the change does not take effect until the printer is turned on again or reset (excluding switch
2-4).

DIP switch 2

DIP Switch Function ON OFF

1

Print colum n selection
7 ✕ 9 font/9 ✕ 9 font

42CPL/35CPL 40CPL/33CPL

2 Internal use (*1)
3Undefined
4 I/FnInit reset signall Enabled Disabled

1-26 Features and General Specifications Rev.B

Panel LEDs

Self-test

Performing the Self Test

The printer has a self-test function that checks the following:

❏ Control circuit functions
❏ Printer mechanisms
❏ Print quality
❏ Control ROM version
❏ DIP switch settings.

See Chapter 4 for instructions on running a self-test.

Power (POWER) LED: Green

On: Power supply of +24V is stable.

Off: Power supply of +24V is not sta ble.
Paper roll near -end

(PAPER OUT) LED:

Red

On: Paper roll near-end is detected. (*1)

Off: Adequate paper remains on the paper roll (normal

condition).

Blinking: Waitin g for restarting test printing on paper roll or

for return to on-line status after automatic paper
feeding.

(*1) Near-end detector is an option.

Error (ERROR) LED: Red

On: Off-line (exce pt during paper feeding usin g the

FEED button and during the self-test).

Off: Normal operat ion.

Blinking Error state. (Refer to the Error types and

countermeasures in Chapter 4.)

Rev. B Features and General Specifications 1-27

TM-U200D/U200PD Technical Manual

Error Processing

Printer Operation When an Error Occurs

The printer executes the following operations upon detecting an error:

❏ All mechanical operations stop
❏ Goes off-line (if DIP switch 1-8 is set to OFF)
❏ The ERROR LED blinks.

Error recovery

The TM-U200D recovers from an error state when you turn off the power, correct the error, and
then turn the power back on.

Data Receive Error

If one of the following er ro rs o ccur s, the pr int er prints “?” or ignor es t he d ata , de pending on the
setting of DIP switch 1-1:

❏ Parity error
❏ Framing err or
❏ Overrun error.

Buffer Full Printing

When subsequent data is received after the printer processes one line of data in the print buffer,
the printer automatically prints the processed data and feeds the paper one line. When the
printer detects no paper, it does not print until new roll paper is loaded.

Detectors and Printing

When the printer detects a paper nea r-end, it stops or c ontinues pri nting, d ependin g on the ES C
c 4 command setting. The roll paper detector always halts printing when there is no paper.

1-28 Features and General Specifications Rev.B

Hexadecimal Dump

Hexadecimal Dump Function

This function prints the data transmitted from the host computer in hexadecimal numbers and
in their corresponding characters.

Performing a Hexadecimal Dump

1. Turn the printer power off.

2. Set DIP switch 1-2 to on to select 40 bytes for the receive buffer capacity.

3. Turn the power on while pressing the FEED button.

4. Before finishing the init iali zatio n of the printer , release t he FEED button, t hen press the FEED

button again. The printer first prints "Hexadecimal Dump" on the paper roll, and prints t he
data received thereafter in hexadecimal numbers and their corresponding characters until
the printer is turned off.

NOTES:

❏ "." is printed if no printable ASCII character corre s ponds to the data received.
❏ During the hexadecimal dump, all commands except DLE EOT and DLE E N Q are disabled.
❏ Insufficient print data to fill the last line can be printed by setting the printer off line. (See to On-line/off-line

switching.)

Sample hexadecimal dump

Hexadecimal Dump

1B 21 00 1B 26 02 40 40 1B 69 : . ! . . & . @ @.i
1B 25 01 1B 63 34 00 1B 30 31 : . % . c4 . .. 01

41 42 43 44 45 46 47 48 49 4A : ABCDEFGHIJ

Options

❏

Paper roll near end detector

❏

External power supply PS-170

❏

Printer fastening tape (DF-10)

❏

RS-485 serial interface

Rev. B Features and General Specifications 1-29

TM-U200D/U200PD Technical Manual

External Power Supply PS-170

Specifications

Input Conditions

Output specifications

Compliance to safety regulation

The following standards is applied only to the equipments with marks and statements

NOTE: Use only the EPSON PS-170 power supply to avoid damage to the printer and the power supply.

100V, 120V, or 230V (specified at time of purchase)

Input voltage (rating) 90 to 264 V

(100VAC - 10% to 230VAC + 15%)

108 V AC to 132 V (120V type)

Frequency (rating) 50 to 60 Hz +/-3Hz

Input current (rating) less than 100 VA

AC switch None

Energizing LED None

Output voltage (rating) 24 VDC ±5%

Output voltage (rating ) 2.0 A

Output electric power
(rating)

48 W

Output peak current 4.5 A (within 300 msec)

UL/C-UL/TÜV

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Chapter 2

Mechanism Configuration and Operating Principles

Printer Mechanism Operating Principles

The printer mechanism M-U200 mounted in the TM-U200D/U200PD is composed of four
mechanisms: print, paper feed, ribbon feed, and detector. In addition to the above four
mechanism, the 2-color Print Version has a ribbon switch mechanism.

Figure 2-1 M-U200D

(Single-color Print Version)

(2-color Print Version )

2-2 Mechanism Configuration and Operating Principles Rev.B

Print mechanism unit

The print mechanism unit consists of the parts shown in the figure below.

Figure 2-2 Print mechanism unit

Frame, paper fee

d

ass’y

Belt

Motor, carriage
ass’y

FFC, print head

Shaft, carriage

Print head unit

Pulley, belt

Carriage sub­ass’y

Shaft, carriage
guide

Earth plate,
print head ass’y

tension

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Print head unit movement

When the Motor, carriage is driven and the Gear, carriage motor is moved in the direction of
arrow B (forward rotation), the rotational power is conveyed to the Pulley, belt drive, then
the belt. Next the Carriage sub-ass’y, which is fixed to the belt, is moved in the direction of
arrow B.

When the Gear, carriage motor is rotated in the direction of arrow A (reverse rotation), the
Carriage sub-ass’y is moved in the direction of arrow A.

Wire movement when a single dot is printed

When the specified print head drive pulse is input to the drive coil, the iron core is magnetized,
and the actuating plate is pul led i n the d i rect ion of arr ow A. T his action pushes the wire toward
the platen. When the wire strikes the ink ribbon and paper against the platen(*), a single dot is
printed.

When the energizing of the drive coil is completed, the wire and actuating plate are returned to
the standby position by the wire return spring and actuating plate spring.

(*) The “platen” is the portion of the Frame, paper feed being struck by the wires during
printing.

Figure 2-3 Print head unit movement

Figure 2-4 Printing

B

B

B

A

A

A

Gear, carriage motor

Pulley, belt drive

Belt

Carriage sub-ass’y

A

B

B

A

Actuating

Paper roll

Ink ribbon

Wire return

Drive coil

plate

spring

Wire

Wire guide

Iron core

Platen

2-4 Mechanism Configuration and Operating Principles Rev.B

Printing a character (9x9 font)

A character is printed by energizing the print solenoids with respect to the Carriage sub-ass’y
portion (the reference timing for the print solenoids is the Motor, carriage phase switching
signals). The print head unit is moved 0.317 mm (0.012”) (in approximately 1.05 ms) each time
the Motor, carriage is rotated one step (7.5°).

To print character “2,” print solenoids 2 and 9 are energized first at the same timing as the
Motor, carriage phase switching signal. Then, print solenoid 8 is energized at TnH (being
delayed a half dot). The remaining print solenoids are energized correspondingly, and the
character “2” is finally printed.

Figure 2-5 Print timing chart

1
2
3

5

4

6
7
8
9

Tn

TnH

Tn+2Tn+1 Tn+3

TnH(4)

Tn+5Tn+4

Motor, carriage phase
switch timing

Print solenoid

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Paper Feed Mechanism Unit

The paper feed mechanism unit consists of the parts shown in the figure below.

Paper feeding is performed by driving the Motor, paper feed (stepping motor).

Figure 2-6 Paper feed mechanism unit

Spring,

Roller, paper hold

Roller, paper

paper hold

feed ass’y

Paper feed, upper

Frame, paper feed ass’y

Gear, paper feed reduction

Shaft, paper hold roller

Motor, paper feed

2-6 Mechanism Configuration and Operating Principles Rev.B

Paper loading (semi-automatic loading)

When the paper roll is manual ly inser te d in to the Roller , p aper feed , t he pa per det ecti on switc h
in the paper path detects the paper, and semi-automatic loading (*) is executed.

(*) Semi-automatic loading is the function that automatically feeds the paper to the top of the
Frame, paper feed assembly when the paper roll is inserted in the paper path when the main
cover is open and the detector detects no paper.

Paper feeding

Paper feeding is performed by conveying the rotational power of the Motor, paper feed to the
gear of the Motor, paper feed through the Gear, paper feed reduction, Gear, paper feed , and
Roller, pap er feed .

Since the Roller, paper feed and Roller, paper hold are pressed together, paper is advanced to
the top of the Frame, paper feed assembly by the fr iction between the rubber of the Rol ler, paper
feed and the Roller, paper hold .

Figure 2-7 Paper loading

Paper

frame, paper feed

Paper guide, upper

Roller, guide

Roller, paper feed

Frame, base ass’y

Roller, paper hold

Spring, paper
hold plate

Case, upper

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

During printing, the Motor, paper feed is driven after each line is printed, causing the paper to
be fed a specified amount. While the FEED button on the switch panel is pressed, the Motor,
paper feed is driven and the paper roll is fed.

Ribbon Feed Mechanism Unit

The ribbon feed mechanism unit consists of the parts shown in the figure below. The printer
feeds the ribbon automatically as the Motor, carr iage rotates .

Figure 2-8 Paper feeding

Figure 2-9 Ribbon feed mechanism unit

Paper roll

Roller, paper feed

Gear, paper feed

Gear, paper feed

Gear, paper feed

Roller, paper hold

reduction

motor

Gear, ribbon intermediate

Ribbon cassette

Ribbon take-up
ass’y

Plate, ribbo n drive
ass’y

Gear, ribbon transmission

Frame, ribbon
assembly

2-8 Mechanism Configuration and Operating Principles Rev.B

Ribbon feeding

When the Motor, carriage rotates forward and the Gear, carriage motor rotates in the direction
of arrow A, the Gear, ribbon intermediate and Gear, ribbon drive rotate in the directions of
arrows B and C, respectively. This causes the Plate, ribbon drive to move in the direction of
arrow D, with the Gear, ribbon intermediate shaft in the center, until the Gear, ribbon drive
engages the Gear, ribbon transmission .

Since the Gear, ribbon transmis sion and the Gear, r ibbon take-up are always engaged , the Gear,
ribbon take-up rotates in the direction of arrow E.

When the Motor, carriag e rot ates in the r everse d irect ion and t he Gear, ca rriag e motor rota tes in
the direction of arrow F, t he Pl at e, ri bbon dr ive moves in the direction of ar row G, d i sengag ing
the Gear, ribbon drive from the Gear, ribbon transmission .

Therefore, the Ribbon take-up ass’y rotates in the direction of arrow E only when the Motor,
carriage rotates forward. Then the ribbon feed and ribbon hold rollers in the Ribbon cassette ,
which are engaged with the Ribbon take-up ass’y , rotate and the ribbon is fed.

Figure 2-10 Ribbon feeding

Gear, carriage motor

Gear, ribbon intermediate

Ribbon take-up

Gear, ribbon take-up

Gear, ribbon transmission

ass’y

Gear, ribbon driv e

F

A

C

B

G

D

E

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Detection Mechanism Unit

The detection mechanism unit consists of the home position detection, paper detection, and
near-end detection (optional) mechanisms.

Home position detection mechanism

The home position detection mechanism consists of the detection protrusion at the left side of
the Carriage sub-ass’y and the Detector sub assembly at the left side of the base frame. It
determines the home position, identifies the carriage position, and detects Carriage sub-ass’y
operation errors.

The Detector sub assembly consists of an LED and photo transistor. When the Carriage sub­ass’y moves, the detection protrusion passes between the LED and photo transistor and blocks
the optical axis of the photo transistor, changing the output level of the photo transistor.

The change in the output level is used as a signal to detect the movement of the Carriage sub­ass’y.

Figure 2-11 Detection mechanism unit

Figure 2-12 Home position detection diagram

Paper detector

Detector

Printer side

The light is blocked

The light is
not blocked

Carriage sub-ass ’ y detection protru si on

Signal level at A

High

Low

+5V

GND

A

2-10 Mechanism Configuration and Operating Pr inciples Rev.B

Paper detection mechanism

The paper detection mechanism is located in the paper path. The mechanism provides end
detection of the paper roll and semi-automatic loading by detecting presence or absence of the
paper roll when it is inserted. Since the paper detector switch sub assembly is a micro switch, it
is always ON when the paper roll is loaded.

Near-end detection mechanism (optional)

The near-end detector ass’y consists of the Lever , N.E. detection and a microswitch detect or and
is located on the right side of the Case, lower. This detector detects the amount of paper left on
the paper roll.

The tip of the Lever, N.E. detection is always pressed against the edge of the paper roll by a
spring inside the microswitch. Therefore, when there is a large amount of paper remaining on
the roll, the Lever, N.E. detection is pressed against the side of the paper roll as depicted by the
solid lines in the figure below. This keep s the microswitch tur ned on. When the amount of pape r
left on the roll decreases below a predetermined amount, the tip of the Lever, N.E. detection no
longer presses against the side of the rol l a nd mov es in t he d irecti on i ndi cat ed by the ar row int o
the hole in the center of the roll core. This turns the microswitch off and generates a signal
indicating that the paper roll is near its end.

Ribbon Switch Mechanism Unit

The ribbon switch mechanism unit consists of the Motor, carriage ass’y, Carriage sub-ass’y,
Tension plate ass’y, Pulley, belt tension, Home position detector ass’y, Frame, ribbon ass’y,
Spring, ribbon frame, Lever, ribbon switch, Lever, ribbon release and Spring, ribbon release.
The mechanism unit is placed at the left and right of the Carriage sub-ass’y, the position of
which is controlled by the number of Motor, carriage steps, with the home position as the
reference position. It switches between t he bla ck and red r ibbon in t he r ibbon swi tch and ri bbon
release areas outside the printing area.

Figure 2-13 N.E. detection mechanism

Paper roll center

Case, case

Microswitch

Lever, N.E.
detection

Paper roll

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Switching from Black to Red

When the Carriage, sub-ass’y (print head unit) moves in the E direction and reaches the ribbon
switch area, the Lever, ribbon switch is pushed by the ribbon switch section and moved to
position A (shown by the dotted lines). The Frame, ribbon ass’y is pushed upward by the Fr ame,
ribbon push face, ribbon switch detent face falls into the Leve r, ri bbon switch hole o f the Fr ame,
ribbon ass’y and the Frame, ribbon ass’y is set to the red position.

Releasing from Red to Black

When the Carriage sub-ass’y moves (in the D direction) and reaches the ri bbo n r elease area, the
Lever, ribbon release is pushed by the ribbon release section, then portion C pushes the Frame,
ribbon ass’y upwaed. At this time, the ribbon switch detent face is released from the Lever,
ribbon switch hole of the Frame, ribbon ass’y, the Lever, ribbon switch is returned to Lever,
ribbon switch position B (shown by the solid lines) by the spring power of the Spring, ribbon
release. When the Carriage sub-ass’y moves in theE direction, the Frame, ribbon a ss’y and Lever,
ribbon release are returned to their original positions by the spring power of the Spring, ribbon
frame.

Figure 2-14 Ribbon Switching

Range of ribbon switchRange of ribbon release

Lever, ribbon switch

A

B

E

D

Print head unit

Lever, ribbon
release

Ribbon

switch

section

Ribbon

release

section

Lever, ribbon switch hole

Ribbon switch detent face

Frame, ribbon
push face

C

2-12 Mechanism Configuration and Operating Pr inciples Rev.B

Electrical Circuitry Operating Principles

Hardware Configuration

Component c on n e ction diagram

The electrical circuitry of the printer consists of the main circuit board and the interface circuit
boards (UB-S01/RS-232, UB-P01/1284, or UB-S02/RS-485). The figure below is a component
connection diagram of the electrical circuitry.

Figure 2-15 Component connection diagram

AC adapter

ior PS |150 j

CN1 CN2 CN4

CN5

CN6CN9CN8CN11

DKD CN2

CN1

I/F circuit board

Near-end
detector (optional)

Various sensors

(Not used) Paper feed motor

Carriage motor

Main circuit board

Host interface

CN7

Print head

Near-end
detector (optional)

Various sensors (Not used)

Motor, paper feed

AC adapter
(or PS-150)

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Circuit board block diagram

The main circuit board unit contains the following electrical circuits:

❏ Power supply circuit
❏ Reset circuit
❏ CPU [internal RAM: 16K bits (2K x 8 bits)]
❏ Memory [EPROM: 512K bit (64K x 8 bits)]
❏ Operation panel control circuit
❏ Drawer kick-out drive circuit
❏ Print he ad driv e circuit
❏ Motor, paper feed drive circuit
❏ DIP switch read circuit
❏ Various detector circuits
❏ Motor, carriage drive circuit

The interface circuit board contains the following:

❏ Reset circuit
❏ Host int erf ace circui t

2-14 Mechanism Configuration and Operating Pr inciples Rev.B

The figure below illustrates the circuit block diagram fo r the printer.

Figure 2-16 Circuit board block diagram

AC adapter

ior PS |150 j

CN1 CN2 CN4

CN5

CN6CN9CN8CN11

DKD CN2

CN1

I/F circuit board

Near-end
detector (optional)

Various sensors

(Not used) Paper feed motor

Carriage motor

Main circuit board

Host interface

CN7

Print head

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Memory Map

The following parts are mapped on the printer memory map:

❏ CPU
❏ EPROM (Program)

Figure 2-17 Memory map

External program memory

Program,
character

generator area

External data memory Intemal memory

Can not to be used.

(Interral ROM

program area)

Can not to be used.

Internal RAM (2KB)

Internal I/O (96bytes)

0000H

FFFFH

F000H

F7A0H

FFA0H

FFFFH

0000H0000H

FFFFH

0000H

FFFFH

0000H

FFFFH

0000H

FFFFH

(For multi-lingual)

Character

generator area

(2)

64KB

(For multi-lingual)

Character

generator area

(1)

64KB

(For multi-lingual)

Character

generator area

(3)

64KB

(For multi-lingual)

Character

generator area

(4)

64KB

CPU (Internal memory) ROM (External program memory)

(External data memory) (4M)

CE

EA

RD

ALE

(CE)P71

(A16)P75
(A17)P76
(A18)P77

A8 |A15

D0 |D7

A8 |A15

A0 |A7

A0 |A7

A16 |A18

D0 |D7

A8 |A15

373

G

D0 |D7
C0 |O7

OC

A0A7

(512K)

OE

D0 |D7

OE

WE

CE

WR

2-16 Mechanism Configuration and Operating Pr inciples Rev.B

Principles of Operation

Power Supply Circuitry

The power supply circuit is compact, uses a switching method, and is attached to the main
circuit board.The following sections describe the power supply circuitry for the printer. The
following table shows the power supply voltages and their usages.

Filter circuit

The +24V (24V to 30V) DC power i s input from the CN1 connector throu gh t he fi lt er ci rcui t. The
filter circuit reduces outside noise and prevents internally-generated noise from flowing
through the +24V power line.

+24V DC circuit

The +24V power from the filter circuit is input to printer power and the +5V regulator circ uit.
Printer pow er and drawe r drive power are the con v erted +24 ±1V that is regulated by series of
regulators (U2 to U4).

Power supply voltage usage

Voltage Usage

+5V

Logic circuit
Interface circuit board
Operation panel circuit
Various detector circuits

+24V

Printer:
Motor, carriage
Motor, paper feed
Print head
Drawer kick-out drive

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

+5V DC control circuit

The +5V regulator circuit switches the +24V power input and converts it to +5V. The switching
regulator IC (U1) switches the +24V input, smooths it via C1, and outputs +5V. Power for the
RS-232 is generated by the internal charge-up circuit on the RS-232 interface driver.

Control Circuitry

Reset circuit

The reset circuit is used to prevent the CPU from operating erratically and the print head from
printing unexpectedly during the period of unstable voltage immediately a fter the po wer is
turned on. To accomplish this, the OUT t erminal out put (pin5 ) of the re set IC (U9) is suppl ied to
the CPU (U5) as the -RESET input signal (pin 21).

The reset IC (U9) monitors the +5V voltage. When the voltage is 4.5V or more, the reset is
released for the CPU and other components, and the printer becomes ready.

In addition, the C terminal (pin 4) of the r eset IC (U9) is connec ted t o the reset signal (DSR sig nal
or pin 25 input signal) from the host interface via DIP switches 2-3 and 2-4. If a reset signal is
applied to this pin, the reset IC output goes low and the CPU and other components are reset.

The reset signals differ depending on the interface specifications:

Figure 2-18 Power supply circuit diagram

Q1

D47

Q2

D48

Q3

D49

R5

R6

R7

+5V

U2

G
N
D

VIN

53

4

1

SENSW

2

VOUT

D4

U3

G
N
D

VIN

53

4

1

SEN

SW

2

VOUT

D3

U4

G
N
D

VIN

53

4

1

SEN

SW

2

VOUT

D5

+

C14

_

+

C45

_

+

C16

_

+

C7

_

+

C9

_

C6

C8

C12

L1

C11

R17

+

C10

_

F1

U1

G

IN

10 1

6

5

LIN

OUT

+

C2

_

C3

C1

+

C5

_

R42

R9

{5 V

+

C41

_

F . G

CN1

1
2

3
4

1
2

3

SH

30 WDTOUT

73 +24COM SW

74 CRCOM SW

P80 WDTOUT

P51/T04

P52/T05

U5

76 PFCOM SW

P53/INT1/TI4

+30V
GND

N . C

F . G

G
N
D

+24DT

HEAD COM
A / C COM
DKD COM

GND

CR COM

GND

GND

PF COM

GND

21

SW1

+5I

+24DT

D6

GND

GNDFG

C13

1M

P.G

Power switch

+24A

+24B

+24C

GND

1

1

Q27

Q24

R59

2-18 Mechanism Configuration and Operating Pr inciples Rev.B

RS-232 serial interface: Two signals can be selected (DSR signal or pin 25 input signal).
IEEE 1284 parallel interface: Pin 25 RESET signal must be used. DIP switch 2-4 is fixed to ON.

The printer can be reset with the nInit signal (pin 31) from the
host.

CPU

The printer uses an external 8-bit and internal 16-bit CPU, with an external clock of 14.7 MHz.
The CPU (U5) controls the internal processing of the printer according to the printer control
program written in EPROM (U8).

Figure 2-19 Reset circuit

CN4 pin 29 is the reset signal of the IEEE 1284 parallel interface circuit board.

CPU pin functions

Pin
No.

CPU
Function

Signal Name I/O Level Description

1 P57 ELED/DSW9 I/O TTL

ERROR LED Low: on
DIP SW 2-1 read when P100, P101 is low

2NMI

NMI I TTL Not used (Connected to +5V directly)

3 P100 AC1/DSEL O TTL

Auto cutter drive (1) and DIP SW read selection
Low: read (read once after the initialization)
High: break status when used as motor cont rol
port

4 P101 AC 2/DSEL O TTL

Auto cutter drive (2) and DIP SW read selection
Low: read (read once after the initialization)
High: break status when used as motor cont rol
port
This pin must be changed at the same time as

P100.
5 AVCC AVCC I (+5V) Analog/digital convertor standard voltage
6 AVSS AVSS I (0V) (Analog/digital conv ertor) GND terminal
7 P60/AN 0 V DTC I Analog +24V power voltage detection
8 P61/AN1 HD TEMP I Analog Head temperature detec tion

DSR_RESET

#25_RESET

CN4

27

28

4

3

R50

{5 V

+

C28

_

C26

DSW2

Q31

Q32

{5 V

R49

5

3

1

4

IN OUT

C GND

U9

D16

D1

29

C42

#RST

C27

{5 V

D26

21

RESET

U5

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

9P62 NE I TTL

Paper roll near-end detection Low: no paper
High: paper present

10 P63 DK S I TTL Drawer open/close Low: open

11 P64 RE I TTL

Paper roll end detection Low: paper present

High: no paper
12 P65 HP DTC I TTL Carriage Detector low: hom e position
13 P66 DET I TTL Host interface DET
14 P67 AC RST I TTL Auto cutter position dete c t ion (reset)
15 VCC VCC I (+5V) Main power terminal
16 P70 CTS I TTL Host interface CTS Low: on
17 P71 CCE O TTL 4M ROM CE sign al L ow : ac t ive
18 P72/RXD1 RD I TTL Host interface RD Low:on
19 P73/CLK1 CLK IN/DTR I/O TTL Host interface CLK IN/DTR
20 P74/TXD1 SD O TTL Host interface SD Low: on
21 RESET

RESET I --- CPU reset input Low: on
22 CLK CLK O TTL Not used. Open
23 VSS VSS I (0V) GND terminal

24 X1 X1 I ---

Connected to ceramic vibrat ion generator.
f=14.74MHz ± 0.5%

25 X2 X2 O --- Connected to ceramic. f=14.74MHz ± 0.5%

26 EA

EA ITTL

External memory access Low: external ROM

High: internal ROM (CPU mask)
27 P75 P75 (A16) O TTL External memory address A16 (software)
28 P76 P76 (A17) O TTL External memory address A17 (software)
29 P77 P77 (A18) O TTL External memory address A18 (software)

30 P80 WDTOUT

OTTL

Watch dog timer error (and hardware limited

time power supply switch) Low: error (reset)
31 P81/INT0 CLK IN/DTR I TTL Connected to pin #19
32 P82 PF SW I TTL Paper feed switch Low: ac tive

33 ALE ALE O TTL

Address latch enable signal

Latch address on the bus AD0 to AD7 at falling.
34 VCC VCC I (+5V) Main power terminal (+5V)

CPU pin functions

Pin
No.

CPU
Function

Signal Name I/O Level Description

2-20 Mechanism Configuration and Operating Pr inciples Rev.B

35 AD0 AD0

3 state TTL

Address/data bus
Transmit address (lower 8 bits) and data.

36 AD1 AD1
37 AD2 AD2
38 AD3 AD3
39 AD4 AD4
40 AD5 AD5
41 AD6 AD6
42 AD7 AD7
43 A8 A8

O TTL Address bus (address upper 8 bits)

44 A9 A9
45 A10 A10
46 A11 A11
47 A12 A12
48 A13 A13
49 A14 A14
50 A15 A15
51 VSS VSS I (0V) GND terminal
52 P20 CR A/DSW1

I/O TTL

Motor, carriage drive control 2-2 phase
excitation All the terminals on (low): hold
DIP SW 1-1to 1-4 read when P100, P101 is low

53 P21 CR B/DSW2
54 P22 CR C/DSW3
55 P23 CR D/DSW4
56 P90 PF A/DSW5

I/O TTL

Motor, paper feed drive control 2-2 phase
excitation All the terminals on (low): hold
DIP SW 1-5 to 1-8 read when P100, P101 is low

57 P91 PF B/DSW6
58 P92 PF C/DSW7
59 P93 PF D/DSW8
60 RD

RD O TTL Externa l m emory data read signal

61 WR

WR O TTL External memory data write signal
62 P32 DKD1 O TTL Drawer kick-out drive signal 1 Low: active
63 P33 DKD2 O TTL Drawer kick-out drive signal 2 Low: active
64 P40 HEAD8 O TTL Pr int head #8 drive signal Low: on
65 P41 HEAD7 O TTL Pr int head #7 drive signal Low: on
66 P42 HEAD6 O TTL Pr int head #6 drive signal Low: on
67 P43 HEAD5 O TTL Pr int head #5 drive signal Low: on
68 P44 HEAD4 O TTL Pr int head #4 drive signal Low: on
69 P45 HEAD3 O TTL Pr int head #3 drive signal Low: on

CPU pin functions

Pin
No.

CPU
Function

Signal Name I/O Level Description

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

ROM (512K bit)

The printer control program and the character generator data are written in ROM (U8). The
control program controls the basi c operat ions of the printer . All CPU (U5) ope ration s foll ow this
program.

RAM (CPU internal 16K bit)

RAM is used as temporary storage for the following:

❏ Data received from the interface (receive buffer)
❏ Pattern data to be printed by the print head (printer buffer)
❏ Data used by the CPU (U5) during processing (flags, pointers, etc.).

70 P46 HEAD2 O TTL Pr int head #2 drive signal Low: on
71 P47 HEAD1 O TTL Pr int head #1 drive signal Low: on
72 P48 HEAD9 O TTL Pr int head #9 drive signal Low: on

73 P51/T04 +24VCOM SW O TTL

Head, auto cutter, Drawer kick-o u t po wer

switch Low: drive
74 P52 CRCOM SW O TTL Motor, carriage power switch Low: motor drive
75 VCC VCC I (+5V) Main power terminal (+5V)

76 P53 PFCOM SW O TTL

Motor, paper feed power switch Low: motor

drive
77 P54 CLK REQ O TTL HOST interface CLK REQ
78 VSS VSS I (0V) GND terminal
79 P55 RTS O TTL Host interface RTS Low: on

80 P56 PLED/DSW0 I/O TTL

PAPER OUT LED Low: on

DIP SW 2-2 read when P100 is low

CPU pin functions

Pin
No.

CPU
Function

Signal Name I/O Level Description

2-22 Mechanism Configuration and Operating Pr inciples Rev.B

Operation panel

The operation panel is located on the main ci rcuit board a nd has 3 LEDs (POWER, ERROR, and
PAPER OUT) and 1 switch (FEED). The POWER LED is driven at the same as +5V is supplied

by the power supply circuit. The ERROR and PAPER OUT LEDs are driven by U5. Switch
detection is also executed by the U5.

Various detector circuits

When the printer detects paper, the Paper detector at the paper inlet turns input signal to CPU
(U5) low. This Detector also fu nctions as semi-automatic loading detector.

The Detector is provided to detect the print head position. The input signal to CPU (U5)
becomes low when the home position is detected.

A near-end detector is an option that detects the remaining amount of a paper roll. The input
signal to CPU (U5) becomes low when a near-end is detected.

Figure 2-20 Operation panel circuit

Figure 2-21 Various detector circuits

P82

C17

R55

Q35 Q36

R56

R41

R54

R15

SW2

1 1 1

222

(PAPER)
D12

(ERROR)
D11

(POWER)
D13

+5V

U5

32 PF SW

1 ELED/DSW9

80 PLED/DSW0

P57/T03

P56/INT3/TI2

GND

4

3

1

2

CN8

4

2

3

1

1

2

2

1

CN11

R40

R37

R39

R16

R36

R38

C23C22 C46

R53

Mechanism 1

Mechanism 2

C44

+5V +5R

GND

NEC

HPC

REC

NE

HP DET

RE

P62/AN2

12

P64/AN4

9

11

P65/AN5

U5

12

12

GND

+5V

R.E

H.P

N.E

GND

Printer mechanism

+5V

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Host interface circuit

The printer has the universal interfaces for connection to the host computer. There are three
kinds of the interfaces:

❏ EIA/TIA RS-232 Interface (TM-U200D)
❏ IEEE 1284 Interface (*1) (TM-U200PD)

(*1) Copyright 1994 by the Institute of Electrical and Electronic Engineers, Inc.
❏ EIA/TIA RS-485 Interface (option)

Refer to the Interface Circuit Board Diagrams in the Appendix.

Drawer kick-out drive circuit

Activating the DKD1 and DKD2 signals from the CPU (U5) causes the transistors Q29 and Q30
to be turned On. This causes then transistor array QM5 to be turned On and the drawer drive
signal is output. The drawer status signal DK_S, which indicates whether or not the drawer is
open, is input to the CPU (U5), allowing the host to check the status via the interface.

The +24V drawer power supply is supplied via the regulator IC (U2), which cuts off the supply
in case of excessive current.

Figure 2-22 Drawer kick-out drive circuit

{5 V

R28

{5 V

Q34

C39

Q29

Q30

D2

R48

R47

8
6
4
2

9
7
5
3

1

1
0

QM5

C45

G
N
D

VI VO

U2

1
2
3
4
5
6

FG
DKD 1P
DKD SW
{24V
DKD 2P
SG

CN2

DKD

U5

62
63

10

P32
P33

P63

+

C16

+

D8

{5 V

R13

DC 24-30V IN

D8

D46

2-24 Mechanism Configuration and Operating Pr inciples Rev.B

DIP switch read circuit

There are 8 switches in DIP switch bank 1 and 2 switches in DIP switch bank 2 that are status
readable switches. Each signal is input to the CPU. The si gnal is read as LOW when the swi tch is
On, and HIGH when the switch is Off.

CPU (U5) pin 52 to 55, pin 56 to 59, and pins 1 and 81 are al so used for the Mo tor, carriage drive
circuit, Motor, paper feed drive circuit, and operation panel control circuit. The pins are used to
read DIP switches temporarily immediately after the printer initialization (or the power is
turned on).

(*1): Resistance between E and B is used for pull-up resistors in the transistor.

Figure 2-23 DIP switch read circuit

{5V

52
53
54
55
56
57
58
59

P20
P21
P22
P23
P90
P91
P92
P93

12345 768

DSW1

U5

D24 D23 D22 D21 D20 D19 D18 D17

Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q36 Q35

D14 D25

12

DSW2

1
80

P57
P56

R33

{5 V

Q39

Q28

Q38

R32

{5 V

R29

{5 V

3

P100

4

P101

(1)

(*1)

Rev. B Mechanism Configuration and Operating Principles

TM-U200D/U200PD Technical Manual

Printer Mechanism Drive Circuit

Print head drive circuit

The head drive signal is output from CPU (U5) pin 64 to 72. Receiving this drive signal, the
transistor array (QM1, QM2) and transistor array (QM3) turn On, Off, and drive the head.

Power supply time to the head is adjusted by the supplied power voltage. CPU (U5) changes the
power voltage between analog and digital at AN0 (pin 7) and decides and controls the head
power supply time according to the internal time table.

In order to prevent damage to the head during excessive printing, a heat Detector has been
installed in the print head. An analog-digital conversion of the partial pressure difference
between the heat Detector and R18 is carried out in AN1 (PIN8) of the CPU (U5) and the
temperature is calculated. If the head is overheating or working improperly, the ERROR LED
flashes.

Figure 2-24 Print head drive circuit

Print head unit

COM (# 3.5.7 )
# 5
# 7
# 1
# 3

wbh jbg

HEAD1

HEAD5

HEAD6

HEAD2

RM3

87
65
43
21

Q4

9

7

5

3

8

6

4

2

1

1
0

QM1

Q6

Q5

Q7

+5V

RM4

87
65
43
21

Q8

9

7

5

3

8

6

4

2

1

1
0

QM2

Q10

Q9

Q11

HEAD3

HEAD7

HEAD9

HEAD8

+24A

D7

68
69

65
72

Q12

R20

1
2
3

CN7

4
5
6
7
8

9
10
11
12
13
14
15

P44
P45

P41

P50

HEAD4

67
66

70

P43
P42

P46

71

P47

64

P40

8 HD TEMP

P61/AN1

7 V DTC

P60/ANO

6

AVSS

5

AVCC

C30C31

R45

R46

R18

C19

C29

R8

+

C33

_

R19

+24DT

# 9
C0M ( # 1.2.9 )
THEM1
THEM2

# 4
# 6
# 8
COM (# 4.6.8 )

# 2

FG

D27 D28

Q13

U5

+5V

+5V

D50

D32

D38

D39

D40

D41

D42

D43

D45

D44

2-26 Mechanism Configuration and Operating Pr inciples Rev.B

Motor, paper feed drive circuit

The Motor, paper feed (stepping motor) possesses an accurate angle of rotation and permits
speed control. It is driven with 2-2 phase excitation. By turning P53 of the CPU to Low, +24V
(+24C signal in the figure below) is applied to the COM terminal of its coil, and it is made to run
by changing P90, P91, P92 and P93 to High and Low. Its speed is determined by the speed of
changing P90, P91, P92 and P93 between High and Low. At the end of paper feeding, P53 of the
CPU is once again set to High.

Motor, carriage drive cir cuit

The Motor, carriage (stepping motor) possesses an accurate angle of rotation and permits speed
control. It is driven with 2-2 phase excitation. By turning P52 of the CPU to Low, +24V (+24B
signal in the figure below) is a pplied to the COM terminal o f its coil, and it is made to run by
changing P20, P21, P22 and P23 to High and Low. Its speed is determined by the speed of
changing P20, P21, P22, and P23 between High and Low. At t he end o f pa per feed ing , P5 2 of the
CPU is once again set to High.

Figure 2-25 Motor, paper feed drive circuit

Figure 2-26 Motor, carriage driving circuit

RM2

87
65
43
21

Q18

9

7

5

3

8

6

4

2

1

1
0

QM4

1
2
3

1
2
3

CN6

4
5

4
5

Q20

Q19

Q21

PF A/DSW5

PF C/DSW7

PF B/DSW6

PF D/DSW8

PF A
PF C
PF COM
PF B
PF D

+24C

D10

(ROTOR)

+5V

+5V

+24C

U5

56
58

57
59

P90/M10
P92/M12

P91/M11

P93/M13

Paper feed motor

D35

D33

D34

D37

CR A/DSW1

CR C/DSW3

CR B/DSW2

CR D/DSW4

RM1

87
65
43
21

Q14

9

7

5

3

8

6

4

2

1

1
0

QM3

1
2
3

1
2
3

CN5

4
5

4
5

Q16

Q15

Q17

CR A
CR C
CR COM
CR B
CR D

+24B

D9

(ROTOR)

+5V

+24B

U5

52
54

53
55

P20/M00
P22/M02

P21/M01

P23/M03

Carriage motor

D29

D30

D31

D36

Rev. B Handling and Maintenance 3-1

TM-U200D/U200PD Technical Manual

Chapter 3

Handling and Maintenance

Handling Precautions

Storage Precautions

❏ Avoid storing the printer in a dusty, humid , or extremely col d area. Also avoid areas t hat are

exposed to direct sunlight for long periods of time.

❏ For long-term storage, place the printer in a polyethylene bag with anti-rust paper (VCI

paper) and keep it in a dry place.

Use Precautions

❏ Always install a ribbon cassette and load paper before printing.

●

If the paper r uns out, be sure to load new pap er before you resume printing.

●

If you try to print when there is no paper or no ribbon cassette in the printer, the print
quality of subsequent print jobs may suffer (the printing color may become uneven, or
some dots may not be printed) because of damage to the surface of the platen, printing
wires, or ribbon.

❏ Use a ground wire connected to the frame ground (FG) screw to ground the printer.
❏ Be careful when wiring and connecting the interface, power, and drawer kick-out cables to

avoid subjecting the connectors to excessive pressure.

Paper Handling Precautions

❏ Use only paper that meets the paper specifications described in Chapter 1 of this manual.
❏ If the paper used does not meet the required specifications, any of the following may occur:

●

Print quality deterioration

●

Problems in loading pap er

●

Paper jams

●

Ribbon may catch on the paper

●

Ink may stain the paper.

3-2 Handling and Maintenance Rev.B

Ribbon Cassette Handling Precautions

❏ Use only the ribbon cassette specified in Chapter 1 of this manual. If another ribbon cassette

is used, any of the following may occur:

●

Print quality deterioration

●

Printer life may be shortened

●

Ink may lea k

●

The ribbon may catch on the print head.

❏ Do not re-ink a ribbon. If a ribbon is re-inked:

●

Print quality could deteriorate due to a malfunction of the print wires

●

Ink may lea k.

Replacing the Paper Roll

Note:

Be sure to use roll paper that meets the sp ecifications.

1. Turn on the printer.

2. Remove the Cover, printer.

3. Pull the paper and cut the paper at the dotted line shown in the illustration below.

4. Press the FEED button to remove the cut paper.

5. Remove the used paper roll.

Cut here

Rev. B Handling and Maintenance 3-3

TM-U200D/U200PD Technical Manual

6. Using scissors, cut the leading edge of the paper roll perpendicular to the paper feed
direction, as shown below.

7. Insert the pape r roll.

Note:

Be sure to note the correct direction that the paper comes off the roll, as shown below.

3-4 Handling and Maintenance Rev.B

8. Hold both edge s of the paper and insert it straight into the pape r slot. The prin ter feeds the
paper automatically.

9. Tear off the paper, as shown below, and then close the Printer cover .

10. When the PAPER OUT light blinks, press the FEED button to set the printer on line.

Replacing the Ribbon Cassette

CAUTION:

Make sure the printer is not receiving data when you replace a ribbon cassette;
otherwise, data may be lost.

1. Remove the Main cover .

2. Remove the used ribbon cassette.

3. Turn the ribbon cassette’s knob in the direction of the arrow to take up any slack in the
ribbon.

Rev. B Handling and Maintenance 3-5

TM-U200D/U200PD Technical Manual

CAUTION:

Never turn the ribbon cassette’s feed knob in the opposite direction of the arrow

marked on the cassette; otherwise the ribbon cassette may be damaged.

4. Insert the ribbon in the position shown in the illustrati on below and push the ribbon casset te
until it clicks.

Note:

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

3-6 Handling and Maintenance Rev.B

5. Turn the ribbon cassette’s knob 5 or 6 times in the direction of the arrow agai n to take up an y
slack in the ribbon.

Removing Jammed Paper

Follow these steps to clear a paper jam:

CAUTION:

The print head becomes very hot during printing. Allow it to cool before you reach into
the printer.

1. Turn the pri nter off and remove the Printer cover .

2. P ull the paper a nd cut it at the position shown by the dotted line in the illustration below.

3. Remove the paper roll.

4. Remove the ribbon cassette from the printer.

Cut here

Rev. B Handling and Maintenance 3-7

TM-U200D/U200PD Technical Manual

5. Untighten the konb of the Frame, ribbon (Thumb-screw) to unlock the Frame, ribbon .

6. Remove the Frame, ribbon from the printer by sliding it in the direction of the arrow. Slide
the Frame, ribbon in the direction of the arrow. ( Single-co lor Print Ver sion only ); then move
the Frame, ribbon (Cover, head) from the printer.

7. Remove all the jammed paper.

Note:

Do not pull the jammed paper in the opposite direction of paper feeding.

8. Replace the Frame, ribbon (Cover, head) and close the lock to secure it.

9. Install the paper roll, Ribbon cassette, and Cover, printer.

Frame, ribbon knob

(Single-color Print Version)

(2-color-Print Version)

Thumb-screw

(Single-color Print Version)

(2-color Print Version)

3-8 Handling and Maintenance Rev.B

Using the Power switch cover

You can use the provided Cover, power switch to protect the power switch from accidental or
improper operation. Attach the cover as shown in the illustration below.

You can turn the power on or off with the switch cover attached by inserting a pointed object
(like a ball point pen) through either of the two small holes on the switch cover.

CAUTION:

If an accident occurs when the Power switch cover i s attached, pull the AC adapter
cord out of the outlet immediately; otherwise the printer may be damaged.

Maintenance

Periodic Checks

Perform the following periodic checks every six months:

Periodic checks

Checkpoints Standards Remedies

Dust, paper particles, or dirt
on and in the printer.

No dust, pap er pa r ti cle s, or di r t s hou l d b e
allowed to build up on or in the printer.

Clean the printer thoroughly with a
vacuum cleaner.

No small piec es of pa per sh ould be left in
the paper path.

Remove any pieces of paper from the
paper path.

Lubrication See the Lubrication section. Lubricate the points listed in Lubrication

points sectio n.

Operation check When each printer compon en t is

observed, no abnormalities should be
found.

Check the printer following the
Troubleshootin g flow ch arts in

Chapter 4.
Shape of the springs No spring should be bent or deformed. Replace any deformed sprin g s.
Ribbon cassette The ribbon cassette should be properly

installed in the printer.

See “Replacing the Ribbon Casset te ”

in this chapter.

Rev. B Handling and Maintenance 3-9

TM-U200D/U200PD Technical Manual

Cleaning

1. Wipe off stains with a clean, dry cloth. If the stains cannot be wiped off, use a neutral
detergent.

CAUTION:

Never use benzene, alcohol, thinner, trichloroethylene, or any of the ketone family of
solvents because they may deform or damage plastic and rubber components.

2. Thoroughly clean all parts of the printer with a vacuum cleaner.

Note:

Check the amount of lubrication in each cleaned area and lubricate as needed. See “Lubricants”
below.

Lubricants

Lubrication is critical to retaining the printer at its initial performance level throughout its
product life, as well as avoiding potential problems. Always lubricate at prescribed intervals,
using the correct lubricants.

Lubrication Standard

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

lubrication points table in this chapter and the lubrication and adhesive points diagrams in
the Appendix.

❏ Lubricate or overhaul after every 5 million lines printed.

Lubricants

The types of l ubricants used greatly affec t the printer’s performance and durability, an d a
lubricant’s low-temperature characteristics require special attention. EPSON has conducted
thorough analyses of the technical data and wide-ranging experimentation on different
lubricants. The EPSON selection of l ubri cant s presc ribed for u se wit h the p ri nter is based on t he
results of such research. The prescri bed EPSON lubri cants a re av ailable in 40 cc (4 0gr) met al cans
or plastic containers (the smallest unit of supply).

The two types of lubricants used with this printer are G-31 and O-10.

3-10 Handling and Maintenance Rev.B

Lubrication Points

The following table describes the lubrication points, type, and class. The numbers in the
following table correspond to the numbers in the lubrication and adhesive points diagrams in
the Appendix on pages A-20 and A-21.

Tool List

The required t oo ls for this printer are as follows:

❏ Brush #1
❏ Cleaning brush
❏ Phillips screwdriver No. 1
❏ Phillips screwdriver No. 2
❏ Phillips screwdriver No. 2 (with long handle)
❏ Flatblade head screwdriver.
❏ Pliers
❏ Retaining pliers #2 .3
❏ Thickness gauge (0.55mm, 0.60mm, 0.65mm)
❏ Tweezers
❏ Slanted blade cutter
❏ Electric soldering iron.

Lubrication points

No. Lubrication point Lubricant type

(1)

Contact points between the Shaft, carriage and
Carriage sub-ass’y (2 points)

O-10

(2) Shaft, ribbon intermediate gear G-31
(3) Shaft, paper hold roller G-31
(4) Both ends of the guide roller G-31
(5) Switching points of Lever, ribbon switch G-31
(6) Switching point of Lever, ribbon release G -31

Rev. B Handling and Maintenance 3-11

TM-U200D/U200PD Technical Manual

Lubricant and adhesive list

Lubricants and adhesives

Type/name Quantity

Grease/G-31 40gr
Oil/O-10 40gr

Rev. B Troubleshooting 4-1

TM-U200D/U200PD Technical Manual

Chapter 4

Troubleshooting

Use the following to troubleshoot and repair the printer:

Self-test

Use the self-test to check the operation of the control circuitry and the printer mechanism.

Troubleshooting flow chart

When the source of the problem is not clear, use the flowchart to find and replace a defective
component.

Troubleshooting table

Follow the steps outlined in this table to repair a defect whose symptoms ar e known.

Self-test

Initiating the Self-test

1. Insert a paper roll and a ribbon cassette in the printer, and close th e printer cover.

2. Turn off the printer.

3. Turn on the printer while keeping the FEED butto n depressed. The se lf-test starts, and status
information is printed.

Self-test Standby

1. When status information printing is complete, the following is printed:

“Self-test printing. Please press PAPER FEED button.”

The PAPER OUT LED flashes alternately to indicate the standby condition.

2. Press the FEED button to continue the self-test.

4-2 Troubleshooting Rev.B

Ending the Self-test

The printer prints “*** completed *** “ and ends the self-test. The printer automatically becomes
ready to receive data after the self-test.

Figure 4-1 Self-test print out

Rev. B Troubleshooting 4-3

TM-U200D/U200PD Technical Manual

Troubleshooting Flowchart

If the source of a problem is not clear, use the flowchart below to find and replace a defective
component. Normally, servicing should be performed by component replacement. Repairs of
the PCBs and other components should be performed only by technicians.

Execute the self-test

Start

Power on

Is POWER

Is PAPER

Is paper roll in

Is self-test normal?

Is printout

END

Host sends print data

Replace or insert paper roll.

11

33

No

Yes

Yes

No

Yes

No

Yes

No

Yes

No

No

Yes

LED lit?

OUT LED lit?

near-end condition
or not inserted?

normal?

22

44

55

loading executed?

Semi-automatic

No

Yes

Is ERROR

LED flashing?

Take the steps
described in Error types
and countermeasures.

END

4-4 Troubleshooting Rev.B

(See Replacing the fuse in Chapter 5)

11

Connect power supply cable prop erly .

Replace external power supply.

Replace Fuse F1

Replace main PCB

OK?

OK?

OK?

Is power supply
cable connected

properly?

Does external power

supply have proper output

voltage rating? (approx. +40 V

in no-load

condition)

Has fuse F1 on

main PCB blown?

End

End

End

End

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

1 PPOWER LED does not light

Yes

Rev. B Troubleshooting 4-5

TM-U200D/U200PD Technical Manual

roll near end sensor

continuity normal?*

Replace the near-

end sensor.

No

OK?

Replace printer mechanism

assembly.

OK?

Replace Mai n PCB.

No

No

END

END

END

Is the paper

Yes

2 PPAPER LED is lit.

2

Yes

Yes

(*) The near-end sensor is optional.

4-6 Troubleshooting Rev.B

33

OK?

OK?

OK?

END

END

END

END

Is paper jammed in

the paper inlet path?

Remove the paper.

Is CN6 connector

hooked up firmly?

Hook up connector

firmly.

Replace printer mechanism

assembly.

Replace main PCB.

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

3 Semi-automatic loading is not executed.

Rev. B Troubleshooting 4-7

TM-U200D/U200PD Technical Manual

44

Take the steps described in

Is ERROR

Replace main PCB

END

END

Yes

No

4 SSelf-test is not normal.

END

OK?

No

Yes

LED flashing?

Error types and countermeasures.

Replace printer

mechanism assembly.

4-8 Troubleshooting Rev.B

55

Replace printer

End

OK?

No

Replace interface PCB.

No

No

No

No

No

No

Yes

No

Yes

Yes

Yes

Yes

Set DIP switch 1–1 to OFF.

Send data from host to computer.

Is “?” printed?

Are serial

interface parameters

set to identical values at

host printer?

Make settings identical.

Replace with a proper cable.

Is

Connect the interface

End

End

End

End

OK?

OK?

OK?

5 Data from host is not printed normally.

Yes

Does

interface

cable match

specifications?

Yes

connected to the

main PCB

firmly?

interface PCB

PCB firmly.

mechanism assembly

Yes

(*)

(*) Dotted line in dicates
the process of checking
problems for the serial
interface.

Rev. B Troubleshooting 4-9

TM-U200D/U200PD Technical Manual

Troubleshooting Tables

If a problem that can be verified by visual examination has occurred, use the Troubleshooting
Tables to determine the cause and perform repairs.

The tables contain the following columns:
❏ Problem

This is the symptom that can be verified.

❏ Probable cause

This is a listing of one or several possible causes that should be examined.

❏ Level

Level A The problem can be corrected by persons who are familiar with the printer and

have general knowledge, but special technical skills are not required.

Level B The problem requires thorou gh knowledge and familiarity with the printer as

well as technical skills and experience.

❏ Checkpoint

These are one or more areas in the printer that should be checked.

❏ Action

These are the steps to correct the problem. If the problem persists after taking these steps,
check the other possible causes listed.

Table 4-1 Troubleshooting table for printer operation failure

Problem Probable cause Level Checkpoint Action

The POWER LED
does not light
when the
power is on.

The AC adapter may
be bad.

B

Check the output voltage of
the AC adapter. (approx. +40
VDC with unloaded)

Replace the AC adapter.

The fuse may be
blown.

B

Check if the fuse F1 on the
Main circuit board ass’y is
blown.

Replace fuse F1. (See
“Replacing the Fuse” in
Chapter 5.)

B

Check if fuse (R42) on the Main
circuit boar d ass’y is blown

Replace the Main circuit
board.

The main PCB may be
bad

B

The cause is none of the
above.

Replace the main PCB.

The printer does
not print the self
test.

The main PCB may be
bad.

B

Check the self test using
another Main circuit board unit.

Replace the main PCB.

The FEED button may
be bad.

B

Check the continuity of the
FEED button (SW2).

Replace SW2.

The printer
mechanism assembly
may be bad.

B

The cause is none of the
above.

Replace the mechanism
assembly.

4-10 Troubleshooting Rev.B

Data from the
host is printed
incorrectly.

An incorrect interface
cable may be use d .

A

Check if the interface cable
matches the printer
specifications.

Use the correct interface
cable.

For the serial interface
models, the pr inter DI P
switch settings do not
match the ho s t
settings.

A

Check if the printer DIP switch
settings match the host setti ngs.

Change the printer DIP
switch settings or host
settings so that they
match.

The Main circuit board
unit may be bad.

B

Check the printer using another
Main circuit board unit.

Replace the Main circuit
board unit.

The mechanism
assembly may be
bad.

B

The cause is none of the
above.

Replace the mechanism
assembly.

The PAPER OUT
LED does not
correctly
indicate the
status of the
paper roll.

The near-end
detector assembly
may be bad. (The
near-end detector is
an option.)

B

Check the signal of the near­end detector ass embly.

Replace the near-end
detector ass e mbly.

The printer is not
initialized.
(Home position
detection error)

The connector is not
inserted correctly.

A

Check if the pin of CR motor
cable is inserted in the
connector CN6 of the main
circuit boar d unit.

Reinsert the connector.

The Motor, carriage
ass’y may be bad.

B

Check the continuity of each
terminal.

Replace the Motor,
carriage asse’y.

The Motor, carriage
may be bad.

B

The cause is none of the
above.

Replace the Motor,
carriage ass’y.

The home position
detector ass’y may be
bad.

B

Using an oscilloscope, check if
the detection signal is output
when print head unit passes
above the home position
detector ass’y.

Replace the home position
detector ass’y.

Semi-automatic
loading is not
executed.
(Paper is not
fed.)

The operation of the
paper supply may be
incorrect.

A

Check if the paper roll meets
the printer specifications.

Use the correct paper roll.
(See “Paper Specifications”
in Chapter 1.)

The paper path may
be incorrect.

A

Check if the paper supply path
is blocked by paper particles or
foreign materials.

Remove any pieces of
paper, paper particles or
foreign materials.

The connector is not
inserted correctly.

A

Make sure that the pin of the PF
motor cable is not inserted in
the connector CN6 of the main
circuit board.

Reinsert the connector.

Motor, Paper feed
may be bad.

B

Check if the motor rotates
during semi-automatic loading.

Replace the Motor, paper
feed.

The Roller, paper
hold ass’y may be
worn.

B

Check if the Roller, paper hold
are worn or damaged.

Replace the Roller, paper
hold ass’y.

The gears may b e
worn or damaged.

B

Check if the Gear, paper feed
reduction and Gear, paper
feed are worn or damaged.

Replace any worn or
damaged parts.

The Paper detection
switch ass’y may be
bad.

B

Using an oscilloscope, check if
the detection signal is output
when roll paper is inserted.

Replace the Paper
detection switch ass’y.

Table 4-1 Troubleshooting table for printer operation failure (Continued)

Problem Probable cause Level Checkpoint Action

Rev. B Troubleshooting 4-11

TM-U200D/U200PD Technical Manual

Table 4-2 Troubleshooting table for bad printing

Problem Probable cause Level Checkpoint Action

The printer does
not print. (The
Motor, carriage
operates, but
nothing is
printed, or the
print color is
light.)

The ribbon in the
ribbon cassette may
be bad.

A

Check if the color of the ribbon
is faded or the ribbon is
wrinkled or torn.

Replace the ribbon
cassette.

The platen gap may
be incorrect.

B

Check the platen gap.
(standard: 0.55 mm ±0.05 mm)

Adjust the platen gap.
(See “Adjustments” in
Chapter 5.)

The common line of
the Print head unit
may be bad.

B

Check the continuity of the
common line.

Replace the Print head
unit.

The FPC, head may
be bad.

B

Check the continuity of the
common line.

Replace the FPC, head.

Dots are missing
continuously. (A
specific dot is
not printed.)

The FPC, head may
be bad.

B

Check the continuity of the F
PC, head.

Replace the FPC, head.

The drive coil of the
Print head unit may be
bad.

B

Using the tester, check the
resistance of the corresponding
drive coil. (Standard: 19.2 ohm
±5%)

Replace the Print head
unit.

The dot wires of the
Print head unit may be
bad.

B

Check if the dot wires are
broken.

Replace the Print head
unit.

Dots are missing
occasionally.

The FPC, head may
be bad.

B

Check the continuity of the
FPC, head.

Replace the FPC, head.

The Print head unit
may be bad.

B

Check if there are paper
particles or ink o n the tip s of th e
dot wires of the Print head unit.

Remove any paper
particles or ink, or replace
the Print head unit.

The Print head unit
may be worn.

B

The cause is none of the
above.

Replace the Print head
unit.

The character
width is
incorrect.

Paper particles or
foreign subs tances
may be attached to
gears or pulley, belt
driving or the belt.

B

Check if any paper particles or
foreign substances are
attached to the Pulley, belt
drive, Pulley, belt te ns io n , an d
belt.

Remove any paper
particles or foreign
substances.

Gears or Pulley, belt
drive or the belt may
be damaged or worn.

B

Check the wear and damage
of the Pulley, belt dri ve, Pulley,
belt tension, and belt.

Replace any worn or
damaged parts.

Paper is not fed.
(Printing is
performed on
one line.)

The operation of the
paper supply may be
incorrect.

A

Check if the specified paper
roll is used.

Use the correct paper roll.
(See “Paper Specifications”
in Chapter 1.)

The paper path may
be incorrect.

A

Check if the paper supply path
is blocked.

Remove paper particles
and foreign substances.

The connector is not
inserted correctly.

A

Make sure that the pin of the PF
motor cable is inserted in the
connector CN6 of the main
circuit board.

Reinsert the connector.

The Roller, paper feed
may be bad.

B

Check the wear and damage
of the surface of the roller.

Replace the Roller, pape r
feed.

The Roller, paper hold
ass’y may be worn or
damaged.

B

Check the wear and damage
of the rollers of the Roller, paper
hold ass’y.

Replace the Roller, pape r
hold ass’y.

4-12 Troubleshooting Rev.B

Paper is not fed.
(Printing is
performed on
one line.)
(cont.)

Gears may be worn or
damaged.

B

Check the wear and damage
of the Gear, paper feed
reduction and Gear, paper
feed.

Replace any worn or
damaged parts.

Motor, paper feed
ass’y may be bad.

B

Check the continuity of the PF
motor cable ass’y.

Replace the Motor, paper
feed cable ass’y.

The Motor, paper feed
may be bad.

B

The cause is none of the
above.

Replace the Motor, paper
feed.

The paper
feeding pitch is
not uniform.

The operation of the
paper supply may be
incorrect.

A

Check if the specified paper
roll is used.

Use the correct paper roll.
(See “Paper Specifications”
in Chapter 1.)

The paper path may
be incorrect.

A

Check if the paper supply path
is blocked.

Remove paper particles
and foreign substances.

The connector is not
inserted correctly.

A

Make sure that the pin of the PF
the motor cable is inserted in
the connector CN6 of the Main
circuit board.

Reinsert the connector.

The Roller, paper feed
may be worn or
damaged.

B

Check the wear and damage
of the surface of the roller.

Replace Roller, pa per
feed.

The Roller, paper hold
ass’y may be bad.

B

Check if the Roller, paper hold
ass’y rotates smoothly.

Clean and lubricate the
Roller, paper hold ass’y or
replace it.

The Roller, paper hold
ass’y may be worn or
damaged.

B

Check the wear and damage
of the rollers of the Roller, paper
hold ass’y.

Replace the Roller, paper
hold ass’y.

Gears may be worn or
damaged.

B

Check the wear and damage
of the Gear, paper feed
reduction and Gear, paper
feed.

Replace any worn or
damaged parts.

The printer prints,
but the ribbon is
not fed.

The ribbon cassette
may be loose.

A

Check if the ribbon cassette is
installed correctly

Install the ribbon cassette
correctly. (See “Repla cing
the Ribbon Cassette” in
Chapter 3.)

The ribbon cassette
may be bad.

A

Check if the ribbon is fed by
rotating the ribbon-tightening
knob.

Replace the ribbon
cassette.

The Plate,ribbon drive
ass’y may be bad.

B

Check if the Plate, ribbon drive
ass’y moves smoothly.

Replace the Plate, ribbo n
drive ass’y.

The clutch portion of
Ribbon take-up ass’y
may be worn.

B

Check if the ribbon does not
move smoothly when you turn
the upper portion of the Ribbon
take-up ass’y.

Replace Ribbon take-u p
ass’y.

Gears may be worn or
damaged.

B

Check if the Ribbon drive ass’y,
Gear, ribbon intermediat e,
Gear, ribbon t ransmission, and
Ribbon take-up ass’y are worn
or damaged

Replace any worn or
damaged parts.

B

Check if any foreign
substances are attached to the
gears.

Remove the foreign
substances.

Table 4-2 Troubleshooting table for bad printing (Continued)

Problem Probable cause Level Checkpoint Action

Rev. B Troubleshooting 4-13

TM-U200D/U200PD Technical Manual

The print color is
mixed. (Half of
the character is
black and the
other half is red)

The Ribbon Cassette
is floating .

A

Verify that the Ribbon cassette
is mounted correc t ly .

Mount the Ribbon caseate
in the correct position.
(See the “Replacing the
Ribbon Cassette” in
Chapter 3)

The ribbon is placed
incorrectly.

A

Verify that the ribbon is not
placed between the Print head
mask ass’y and Frame, paper
feed ass’y.

Place the ribbon between
the Print head unit and
Print head Mask ass’y.

The Frame, ribbon
ass’y is deformed.

B

Verify that the Frame, ribbon
ass’y is not deform ed .

If it deformed, replace the
Frame, ribbon ass’y .

The ribbon is
defective.

A

Verify that the color of the
ribbon is not blurred, or the
Ribbon is not rumpled or worm

Replace the Ribbon
cassette if the ribbon is
worn or the print color is
light.

Color does not
change. (Black
to red or red to
black)

The Spring, ribbon
release is unhooked or
damaged.

B

Verify that the Spring, ribbon
release is not unhooked or
damaged.

If the spring is unhooked,
hook it back on.
If it is damage d, r ep lac e it.

The Spring, ribbon
frame is unhooked or
damaged.

B

Verify that the Spring, ribbon
frame is not unhooked or
damaged.

If the spring is unhooked,
hook it back on.
If it damaged, replace it.

Table 4-2 Troubleshooting table for bad printing (Continued)

Problem Probable cause Level Checkpoint Action

4-14 Troubleshooting Rev.B

Error Types and Countermeasures

Follow the flowcharts on the next page based on the ERROR LED blinking patterns in the table
below and repair the printer. The printer does the following when an error occurs:

❏ All operations stop
❏ The printer goes off-line (when DIP SW2-3 is off)
❏ The ERROR LED blinks.

ERROR LED blinking patterns

Error ERROR LED Blinking PatternError Description Action

(1) Head high-temper­ ature error ( 1)

Print head temperature is too high.

*

(2) Auto cutter error

There is an abnormality in the
auto cutter.

(3) Memory or gate
array read/write
error

Read/write check has failed.

(4) High-voltage error

Power supply voltage is too high.

(5) Low-voltage error

Power supply voltage is too low.

(6) CPU execution
error

CPU is trying to execute an invalid
address.

(7) Thermistor error

There is an abnormality in detecting
the print head temperature or the print
head rank can not be read correctly.

Action 1

Action 2

Action 3

Action 4

Action 5

Action 6

Action 7

( 1) This error can occur for a short time during normal printing, when the print head reaches a high temperature. No repair
is necessar

y

in this case.

*

160 ms

3

4

4

3

Home position
detection error

Home position cannot be detected
due to a paper jam or other problem.

Print head
temperature
detection error.

Print head temperature is out of
normal operating range.

Rev. B Troubleshooting 4-15

TM-U200D/U200PD Technical Manual

Action 1

Wait for the print head temperature to drop.

printer recovered

from the error?

Replace main PCB

Yes

No

END

END

END

No

OK?

Action 1

Yes

Replace printer me ch anism assembly.

Has the

4-16 Troubleshooting Rev.B

Action 2

No

Yes

No

Is CN5 connector

Remove paper.

Insert the connector

OK?

END

END

OK?

OK?

END

Replace main PCB

Action 2

Yes

END

No

Yes

No

Yes

Yes

inserted firmly?

firmly.

Replace pri n ter

mechanism assembly.

Are there
any pieces of paper
in the home position

sensor?

Rev. B Troubleshooting 4-17

TM-U200D/U200PD Technical Manual

END

END

END

Yes

Yes

No

No

No

Action 3

Turn the printer power off.

Does external power

supply have proper output

voltage rating? (approx. 40V

in no-load

condition)

Replace external

power supply.

Replace main PCB

Replace printer mechanism assem bly .

OK?

OK?

Action 3

Yes

4-18 Troubleshooting Rev.B

END

END

Yes

No

Action 4

Replace main PCB.

Replace pri n ter

OK?

Action 4

mechanism assembly.

Rev.B Disassembly, Assembly, and Adjustment 5-1

TM-U200D/U200PD Technical Manual

Chapter 5

Disassembly, Assembly, and Adjustment

Small Part Specifications

This section uses abbreviations for small parts such as screws and washers. The following is a list o f these
abbreviations and illustrations of the screw types.

❏ CCS-tite Cross-rec essed Cup head S-tite self-tapping screw
❏ CBS-tite Cross-recessed Binding head S-tite self-tapping screw
❏ CBB-tite Cross-recessed Binding head B-tite self-tapping screw
❏ CBT-B Cross-recessed Binding head self-tapping screw without fluted class 2
❏ CP(O) Cross-recessed Pan head screw with outside toothed lock washer
❏ CPS-tite Cross-recessed Path head S-tite self-tapping screw
❏ CPS-tite(O) Cross-re cessed Pan head S-tite sc rew with outside toothe d lock washer
❏ CPT-B Cross-recessed Pan head self-tapping screw without fluted class 2
❏ CPP-tite Cross-recessed Pan head P-tite self-tapping screw

Head (top) Head (side) Body Washer (assembled)
C (Cross) P (Pan)

B (Bind)

C (Cup)

S-tite

T-B

B-tite

P-tite

(O)

5-2 Disassembly, Assembly, and Adjustment Rev. B

Disassembly

Removing the fuse

1. Turn off the printer.

2. Disconnect the external power supply.

3. Remove the main cover assembly from the printer.

4. Remove the lower plate from the printer.

5. Use tweezers to remove the blown fuse.

6. Replace the fuse with a 125 V, 2.0 AT Littelfuse 154002T.

CPS-tite (M3x6)
[0.59 to 0.78 N • m
(6 to 8 kgf • cm)]

Fuse

Rev.B Disassembly, Assembly, and Adjustment 5-3

TM-U200D/U200PD Technical Manual

Sub-assembly A

Frame, paper feed unit ass’y

1. Apply G-31 to the middle of the Shaft, Roller, paper hold.

2. Pass the Shaft, Roller, paper hold through the Spring, paper hold plate and Roller, paper hold.

3. Hold the Roller, paper feed ass’y at the angle shown in the illustration and insert the thin end of the
shaft into the Frame, paper feed ass’y. Then move the Roller, paper feed ass’y into place.

Shaft, Roller, paper hol d

Apply G-31

Roller, paper hold

Spring, paper hold plate

Frame, paper feed ass’y

Roller, paper feed ass’y

thin
portion

5-4 Disassembly, Assembly, and Adjustment Rev. B

4. Attach the Gear, paper feed reduction to its shaft as shown in the second illustration below. Make
sure that the Gear, reduction is closer to the frame than the Gear, paper feed.

5. Next, insert the J feed roller shaft holder L into the frame as shown in the illustration.

6. Fix the J feed roller shaft holder L onto the shaft on the Roller, paper feed ass’y, insert it in the frame,
and lock it with R.E.

Note:

The right J feed roller shaft h older L, which is fixed to the Roller, paper feed ass’y, is inserted
into the frame first; then the J feed roller shaft holder L is attached.

J feed roller shaft holder (right)

Gear, paper feed

R.E(2.3)

J feed roller

Gear, paper feed
reduction

shaft holder L