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TM-U300A/U300B/U300PA/U300PB
Operator’s Manual
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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.
Centronics is a trademark of Centronics Data Computer
Corporation.
Epson and ESC/POS are registered trademarks of Seiko Epson Corporation.
NOTICE:
The contents of this manual are subject to change without notice.
Copyright 0 1992, 1994, 1997 by Seiko Epson Corporation, Nagano, Japan

EMC and Safety Standards Applied
Printer
Product Name: TM-U300A/B,
TM-U300PA/PB
Model Name: M51JA/B, M51PA/PB
The following standards are applied only
to the printers that are so labeled. (EMC is
tested using the packaged AC adapter.)
Europe: CE marking
North America: EMI: FCC/ICES-003
Class A
Japan: EMI: VCCI Class A
Oceania: EMC: AS/NZS 3548
Taiwan: EMI: Class B
WARNING
The connection of a non-shielded printer
interface cable to this printer will
invalidate the EMC standards of this
device.
You are cautioned that changes or
modifications not expressly approved by
SEIKO EPSON could void your authority
to operate the equipment.
AC Adapter
Product Name:PA-6511/6513,
PB-6509/6510
Model Name: M34PA, M34PB
The following standards are applied only
to the AC adapters that are so labeled.
(The printer and the AC adapter together
are applied to the EMC standards.)
Europe: CE marking
Safety: EN60950
North America: Safety:UL 1950/CSA
C22.2 No. 950
Japan: Safety: Electrical
Appliance and Material
Control Law of Japan
Oceania: Safety: AS 3260
CE Marking
The printer conforms to the following
Directives and Norms:
Directive 89/336/EEC
EN 55022 Class B
EN 50082-1
IEC 801-2
IEC 801-3
IEC 801-4
FCC Compliance Statement
For American Users
This equipment has been tested and found
to comply with the limits for a Class A
digital device, 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
instruction manual, may cause harmful
interference to radio communications.
Operation of this equipment 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.
FOR CANADIAN USERS
This Class A digital apparatus complies
with Canadian ICES-003.
Cet appareil numérique de la classe A est
conforme
Canada.
la norme NMB-003 du
à
i

INTRODUCTION
The TM-U300A/U300B and TM-U300PA/U300PB printers are designed to provide a high
cost-performance ratio. They are compact, light-weight, and highly reliable one-station
printers using plastic mechanical frames. They have the following features and are applicable to the POS 1 station printer market.
l Compact and light-weight.
*
High speed printing using logic-seeking.
.
High reliability and long life due to the use of stepping motors for both carriage
return and paper feeding.
l Printing color switch (red/black) available.
*
Various formats are possible because the paper feeding pitch is selectable.
.
High general control utility based on the ESC/POS® standard.
l 2 drawers can be driven due to the internal drawer interface.
l Character font (7 X 9, 9 X 9) is selectable.
*
Semi-automatic paper loading.
*
Compact AC adapter power supply.
.
An auto-cutter unit is provided and full cut/partial cut is selectable by command.
l A take-up device is included.
(Standard only for the TM-U300A/U300PA)
Function Available
Interface
TM-U300A
With auto-cutter
With take-up device
Serial
TM-U300B
With auto-cutter
Serial
TM-U300PA
With auto-cutter
With take-up device
Parallel
TM-U300PB
With auto-cutter
Parallel
Please be sure to read the instructions in this manual carefully before using
your new Epson printer.
ii

CONTENTS
Chapter
1
UnpackingthePrinter
...........................................................................
1
1-1 Checking the Contents of the Box
..................................................................
1
1-2
Choosing a Place for the Printer..
...................................................................
2
1-3
Removing the Transportation Damper..
.........................................................
2
1-4
Names andFunctions ofParts
......................................................................
3
Chapter
2
BeforeSetting
Up
..................................................................................
5
2-1
Connecting the AC
adapter to the
Printer......................................................
5
2-2 Connecting theHost Computer to the
Printer................................................
6
Chapter
3
Installingthe
Parts.................................................................................
8
3-1 Installing the Ribbon Cassette........................................................................
8
3-2
Installing
theRoll
Paper...............................................................................
11
3-3
Adjusting thePaperNear-EndDetector
......................................................
17
3-4 DIP Switches
................................................................................................
19
Chapter
4
TheSelfTest
........................................................................................
21
4-1
The Self Test................................................................................................
21
Chapter
5
RemovingJammedPaper
...................................................................
22
5-1
Removing Jammed Paper..
..........................................................................
22
APPENDIX
...............................................................................................................
23
APPENDIX A
General Specifications..
..............................................................
23
iii

Chapter 1 Unpacking the Printer
1-1 Checking the Contents of the Box
n
Checking the parts
The illustration below shows the items included for the standard specification printer.
TM-U300A/U300PA
TM-U300B/U300PB
l
Printer
l
Ribbon cassette l Roll paper
l
AC adapter (*1)
l
Hexagonal lock
screws (2 pcs) (*2)
l
Operator’s Manual
(*1)
One of eight types of AC adapters may be included with your printer.
Refer to Appendix A, General Specifications for information on your AC
adapter’s input voltage, dimensions, and weight.
(*2)Hexagonal lock screws are provided only if the printer has a serial inter-
face. See note on page 7 for more information about these screws.
Make sure no parts are missing or damaged. If you find any damaged or missing
parts, please contact your dealer for assistance.
n
Maintenance
Keep the packing case in case you ever need to transport or store your printer.
1

1-2
Choosing a Place for the Printer
n Avoid locations that are subject to direct sunlight or excessive heat (near
heaters).
n
Avoid using or storing the printer in places subject to excessive temperatures or
moisture.
n
Do not use or store the printer in a dusty or dirty location.
n
When setting up the printer, choose a stable, horizontal location.
Intense vibration or shock may damage the printer.
n
Ensure the printer has enough space to be used easily.
1-3 Removing the Transportation Damper
The transportation damper must be removed before turning on the printer.
Open the printer cover, and remove this material as follows:
2

1-4
Names and Functions of Parts
n
Part names
➀
TM-U300A/U300PA:
Take-up cover
➄
Interface connector
TM-U300B/U300PB:
Roll-paper cover
➅
Drawer kick-out connector
➁
Printer cover
➂
Operation panel
➃
Power switch
TM-U300A/U300PA
➆
Power connector
➇
DIP switches
TM-U300B/U300PB

n
Operation panel
Panel Switches
➀
POWER switch
Turn the printer ON and OFF.
➁ FEED switch
Feeds roll paper.
*
Feeds roll paper based on the line feed amount set by
ESC
2 and
ESC 3.
Panel Lights (LED)
➂
POWER LED (green)
On when power is turned on.
➃
PAPER LED (red)
On when the paper roll near the end.
Blinks when an error has been detected, when the printer is in the test printing
standby state, or when printing has stopped due to exceeding the allowable
print duty cycle.
4

Chapter 2 Before Setting Up
2-1
Connecting the AC Adapter to the Printer
n
Plugging in AC adapter
CAUTIONS:
*
Before connecting the printer to the power supply, make sure that the
voltage and power specifications match the printer’s requirements.
-
Using an incorrect power supply can cause serious damage to the printer.
Connect the AC adapter according to the following procedure.
➀
Make sure the printer is turned off.
➁
Plug the power cable connector into the printer’s power connector with the ar-
row mark facing upward. (You can remove the power cable by grasping the
connector firmly at the arrow mark and pulling straight out.)
ower Connectorower Connector
Frame
➂
Plug the power cord into the outlet, and turn on the power.
➃
Be sure to ground the printer with the frame ground screw on the board at the
rear side of the unit via a F.G cable.
5