Epson TM-U330 Series Use and care manual

Technical Reference Guide
M00079805
Rev. F

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TM-U330 Technical Reference Guide
Cautions
❏No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson
Corporation.
❏The contents of this document are subject to change without notice. Please contact us for the latest information.
❏While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no
responsibility for errors or omissions.
❏Neither is any liability assumed for damages resulting from the use of the information contained herein.
❏Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties for damages,
losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or
unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko
Epson Corporation’s operating and maintenance instructions.
❏Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options or any
consumable products other than those designated as Original Epson Products or Epson Approved Products by Seiko Epson
Corporation.
Trademarks
Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States and/or other countries.
IOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
Android™ is a trademark of Google LLC.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.
All other trademarks are the property of their respective owners and used for identification purpose only.
ESC/POS Command System
Epson ESC/POS is a proprietary POS printer command system that includes patented or patentpending commands. ESC/POS is
compatible with most Epson POS printers and displays.
ESC/POS is designed to reduce the processing load on the host computer in POS environments. It comprises a set of highly
functional and efficient commands and also offers the flexibility to easily make future upgrades.
©Seiko Epson Corporation 2014–2023

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About This Manual
Aim of the Manual
This manual was created to provide information on the TM-U330 printer for anyone who is developing
hardware, installations, or programs. Programmers will also want to consult other documents.
Contents of the Manual
Chapter 1, "General Information." General description of features plus specifications.
Chapter 2, "System Planning." Contains introduction of control methods and each
connection form.
Chapter 3, "Setup." Contains information on such matters as memory
switches, error processing for using TM-U330.
Chapter 4, "Troubleshooting." Contains useful information for using.
Chapter 5, "Application Development
Information."
Contains useful information for programming.
Appendix "Character Code Table." Contains the supported character tables.

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TM-U330 Technical Reference Guide
Important Safety Information
This section contains important information intended to ensure safe and effective use of this product.
Please read this section carefully and store it in an accessible location.
Key to Symbols
The symbols in this manual are identified by their level of importance, as defined below. Read the
following carefully before handling the product.
!WARNING:
Warnings must be observed carefully to avoid serious bodily injury.
!CAUTION:
Cautions must be observed to avoid minor injury to yourself, damage to your equipment, or loss of data.
QNote:
Notes have important information and useful tips on the operation of your equipment.
Safety Precautions
!WARNING:
❏ Shut down your equipment immediately if it produces smoke, a strange odor, or unusual noise.
Continued use may lead to fire. Immediately unplug the equipment and contact qualified service
personnel for advice.
❏ Never attempt to repair this product yourself. Improper repair work can be dangerous.
❏ Never disassemble or modify this product. Tampering with this product may result in injury or fire.
❏ Be sure to use the specified power source. Connection to an improper power source may cause fire.
❏ Do not allow foreign matter to fall into the equipment. Penetration by foreign objects may lead to fire.
❏ If water or other liquid spills into this equipment, do not continue to use it. Continued use may lead to
fire. Unplug the AC cable immediately and contact qualified service personnel for advice.
❏ Do not use aerosol sprayers containing flammable gas inside or around this product. Doing so many
cause fire.

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!CAUTION:
❏ Do not connect cables in ways other than those mentioned in this manual. Different connections may
cause equipment damage and burning.
❏ Be sure to set this equipment on a firm, stable, horizontal surface. Product may break or cause injury if it
falls.
❏ Do not use in locations subject to high humidity or dust levels. Excessive humidity and dust may cause
equipment damage or fire.
❏ Do not place heavy objects on top of this product. Never stand or lean on this product. Equipment may
fall or collapse, causing breakage and possible injury.
❏ Take care not to injure your fingers on the manual cutter
• When you remove printed paper
• When you perform other operations, such as loading/replacing roll paper
❏ To ensure safety, unplug this product before leaving it unused for an extended period.
❏ Before moving the product, unplug it and unplug all cables connected to it.
Notes on Usage
❏Do not open the cover during printing or when the autocutter is being operated.
❏Do not install the printer in a dusty place.
❏Protect the printer from impact.
❏Cords or other foreign objects must not be caught on the printer.
❏Do not apply excessive force to the printer case.
❏Do not place food or beverages such as coffee on the case of the printer.
Notes on Installation
When using the printer, be sure that the printer is installed horizontally.
Caution Labels
The caution labels on the product indicate the following precautions.
!KCAUTION:
The print head and the motor can be very hot during printing and immediately after printing. Touching it
may cause burns.

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TM-U330 Technical Reference Guide
Restriction of Use
When this product is used for applications requiring high reliability/safety, such as transportation devices
related to aviation, rail, marine, automotive, etc.; disaster prevention devices; various safety devices, etc.; or
functional/precision devices, etc.; you should use this product only after giving consideration to including
fail-safes and redundancies into your design to maintain safety and total system reliability. Because this
product was not intended for use in applications requiring extremely high reliability/safety, such as
aerospace equipment, main communication equipment, nuclear power control equipment, or medical
equipment related to direct medical care, etc., please make your own judgment on this product’s suitability
after a full evaluation.

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About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iii
Aim of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iii
Contents of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iii
Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iv
Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iv
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -iv
Notes on Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -v
Notes on Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -v
Caution Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -v
Restriction of Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -vi
Chapter 1 General Information
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Printer handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Product Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Printer types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Standard Parts Included with the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Related materials for TM-U330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Ribbons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Roll paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Product Specifications Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Printing and paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Autocutter (for Type B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Paper Roll Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Other Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
External Dimensions and Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
External Dimensions and Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Chapter 2 System Planning
Control Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Selecting a Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
ESC/POS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Epson ePOS SDK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Software and Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
How to Get Software and Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Printer Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Connecting the Optional Customer Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Chapter 3 Setup
Part Name and Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Part name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
The Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Setup Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Printer setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Installing or Replacing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Installing the Roll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Connecting the AC Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

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TM-U330 Technical Reference Guide
Connecting the Printer to the Host PC / POS Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Adjusting Various Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
How to Confirm Current Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Memory Switch Setting Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Adjusting Roll paper width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Adjusting Position of Roll Paper Near End Detector (factory option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-22
Install a Printer Driver in the Host PC / POS Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
OPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Advanced Printer Driver (APD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Self Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Chapter 4 Troubleshooting
LED Blinking Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Error Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Removing a Paper Jam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Autocutter Jam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Printer prints “?“ or Incorrect Data With Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Print Speed is Slow When Using Windows Printer Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Printer doesn’t cut roll paper with the autocutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Chapter 5 Application Development Information
Various Status Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Printer Status on APD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
OPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Cash Drawer Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Advanced Printer Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
OPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
ESC/POS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
NV memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
NV Bit-image Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Advanced Printer Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
OPOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
ESC/POS command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Printing for journal used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
FAQ List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Q. Drawer kick does not operate properly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Q. Unable to print a part of Page 0 in Visual Basic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
Appendix A Character Code Table
Common to all pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Page 0 (PC437: USA, Standard Europe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
International Character Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

General Information 1-1
TM-U330 Technical Reference Guide
Chapter 1
General Information
1.1 Features
The TM-U330 is a high reliable 24-pin impact dot matrix printer that provide precision text and graphics.
The TM-U330 has the same footprint as TM-U220.
1.1.1 General
❏Compact and lightweight.
❏2 model types are provided. (See "Printer types" (page 1-2))
❏Excellent reliability and long life due to adoption of a stepping motor both for moving the carriage
and for paper feeding.
❏Supports paper roll with black mark
1.1.2 Printer handling
❏Easy drop-in paper loading and easy maintenance
❏Cable connectors are housed in the bottom of the printer.
❏Built-in two drawer kick interface connectors
❏Built-in autocutter (for type B)
1.1.3 Printing
❏High-speed printing through logic-seeking control
❏Two-color printing (black and red)
❏Can print on various paper wide range (76 / 69.5 / 57.5 mm)
1.1.4 Software
❏Command protocol is based on the ESC/POS proprietary command system.
❏OPOS ADK and Windows printer driver are available.
❏The Epson ePOS SDK is provided for iOS, Android and Windows application, and Web application
development.
The Epson ePOS SDK is a software development kit that integrates the ePOS-Print SDK and the
ePOS-Device SDK.

1-2 General Information
1.2 Product Structure
1.2.1 Printer types
TM-U330 has 2 model types: B, D. The features are as following.
TM-U330B: Autocutter is installed
TM-U330D: Autocutter is not installed
Interface type:
Serial interface model: Built-in USB + RS-232C
Parallel interface model: Built-in USB + Bidirectional parallel (IEEE1284)
LAN interface model: Ethernet (10BASE-T, 100BASE-TX)
1.2.2 Standard Parts Included with the Printer
❏Exclusive ribbon cassette [ERC-45(B/R)]
❏Power switch cover
❏AC adapter
❏AC cable *
❏Wire saddle *
❏User’s Manual
* May not be included depending on the printer model.
1.2.3 Related materials for TM-U330
TM-U330 has the related materials listed in the following table.
Please contact your dealer to get these.
Category Name Description
Options DF-10 Affixing tape for fixing the printer
DM-D110, DM-D210 Direct connection customer display (available only for some serial interface
models and some USB models)
(See the below NOTE also.)
POS
accessories
DM-D series These are customer displays. (Line Display)

General Information 1-3
TM-U330 Technical Reference Guide
1.3 Consumables
1.3.1 Ribbons
This printer needs a ribbon cassette to print receipts. We provide 2 ribbon cassettes:
❏EPSON ribbon cassette, ERC-45 (B) (Life: 3,000,000 characters / Color: Black)
❏EPSON ribbon cassette, ERC-45 (B/R) (Life: 1,500,000 characters / Color: Black)
(Life: 750,000 characters / Color: Red)
Note:
These ribbon cassette life numbers are under the Epson test conditions.
1.3.2 Roll paper
We provide roll paper and carbon roll paper with 1 copy for this printer. The widths are 76 mm, 69.5 mm,
and 57.5 mm {3.00"/2.74"/2.26"}.
Note:
The paper 69.5 mm wide is usable only when the mark sensor is disabled.

1-4 General Information
1.4 Product Specifications Overview
*: - Supported by the firmware version 1.01 ESC/POS or later.
- Since the recognition rate for barcodes and 2D symbols varies depending on ink ribbon density and gradation, module width,
environmental temperature, paper type, and reader performance, the reader might be unable to recognize some barcodes and 2D
symbols. Please check the recognition rate before using this product.
- When printing bar codes, HRI characters must be added.
Print method serial impact dot matrix
Paper width 76 mm / 69.5 mm / 57.5 mm {3.00"/2.74"/2.26"}
Auto cut type
(TM-U330B only)
Partial cut (cutting with one point on right edge left uncut)
Character sets 95 alphanumeric, 2 international character sets
Extended graphics: 128 3 pages
GB18030-2022 (Lv.2): 28806 (for Simplified Chinese characters model)
Font size
(width x height)
Alphanumeric Font A: 9 24
Alphanumeric Font B: 7 24
Chinese font: 24 24
Font B is the default of alphanumeric.
Interface (compatible) Serial interface model: Built-in USB + RS-232C
Parallel interface model: Built-in USB + Bidirectional parallel (IEEE1284)
LAN interface model: Ethernet (10BASE-T, 100BASE-TX)
Buffer Receive buffer: Selectable as 4 KB or 40 bytes using a Memory switch 1-2.
Non-volatile graphics data buffer: 256 KB
User NV memory: 8 KB
Barcode/Two-
dimensional symbol *
Code39, Code128, QR code
Power supply Included AC adapter
Operating voltage DC+24 V±7%
Power consumption
(except for drawer kick
driving)
Operating: Approximately 32.6 W
Standby: Approximately 1.8 W
Temperature During operation: 0 to 50C {41to 122F}. (At 34C {93F} or higher, there are humidity restrictions; refer
to "Environmental Conditions" (page 1-11)
During storage: -10 to 50C {14 to 122F} (excludes paper and ribbon)
Humidity During operation:10 to 90% (no condensation)
During storage:10 to 90% (no condensation; excludes paper and ribbon)
Weight (mass) TM-U330B: Approximately 2.8 kg {6.17 lb}
TM-U330D: Approximately 2.6 kg {5.73 lb}

General Information 1-5
TM-U330 Technical Reference Guide
1.5 Printing and paper Specifications
*: This printer adjusts print speed when it prints graphic data, etc.
Note:
lps: lines per second
cpl: Characters per line
cpi: Characters per inch (25.4 mm)
Printing method Serial impact dot matrix
Head wire configuration 24-pin serial configuration
Printing direction Bidirectional printing (logic seeking)
Print speed * Alphanumerics: Approximately 5.0 lps (printing 42 columns per line at 17.1 cpi)
Chinese: Approximately 5.0 lps (printing 80 dpi font, 22 columns per line at 10 cpi)
(except data transmission and processing time)
Paper width 76 mm {3.00"} 69.5 mm {2.74"} 57.5 mm {2.26"}
Printing
width
120 dpi base 300 dots 270 dots 225 dots
240 dpi base 600 dots 540 dots 450 dots
180 dpi base 450 dots 405 dots 337 dots
Characters
per line
Alphanumeric
Font A
33 cpl 30 cpl 25 cpl
Alphanumeric
Font B
42 cpl 38 cpl 32 cpl
Chinese
(180/90 dpi)
16 cpl 15 cpl 12 cpl
Chinese
(80 dpi)
22 cpl 20 cpl 16 cpl
Character spacing Alphanumeric: 0 dot
Chinese: 3 dots
The spacing of alphanumeric and Chinese are changeable by ESC/POS command.
Paper feeding method Friction feed
Paper feed speed 35 lps {Approximately 5.8"/s} (during continuous feeding)
Line spacing Initial setting: Approximately 4.23 mm {1/6"}
Can be set in units of approximately 0.141 mm {1/180"} by ESC/POS command

1-6 General Information
*: Change using the FS S command (default 3).
Note:
Font B is the default. (7 × 24)
1.5.1 Autocutter (for Type B)
Note:
It is recommended to feed approximately 2.116 mm or more in advance before printing to prevent dot
displacement after cutting.
Character Dimensions, Characters Per Inch, Characters Per line
Character configuration Character
dimensions W
x H (mm)
Dot spacing
between characters
Paper width (mm) and
Characters per line (cpl)
Characters
per inch (cpi)
Horiz. x Vert. Character
type
76 69.5 57.5
Font B
(7 x 24)
ANK 1.48 x 3.38 0 42 38 32 17.1
Font A
(9 x 24)
ANK 1.91 x 3.38 0 33 30 25 13.3
Kanji Font
(24 x 24)
Kanji
(180/90dpi)
3.38 x 3.38 3 *16 15 12 7.5
Kanji
(80dpi)
2.54 x 3.38 3 *22 20 16 10
Cutting method: By separated-blade scissors
Cutting type: Partial cut (one point uncut)

General Information 1-7
TM-U330 Technical Reference Guide
1.5.2 Paper Roll Supply
1.5.2.1 Paper Specifications
Supply method: Drop-in method
Paper roll end detection: Detection method: Mechanical microswitch
Detection position: Positioned within the paper path for the roll paper;
detects the end of the roll paper
Near-end detector: Detection method: Mechanical microswitch
Inner diameter of the roll paper core: 10.5 to 12.5 mm
Near-end adjustment: Adjusting screw
Remaining amount: Fixed position
#1 approximately 8 mm
#2 approximately 5 mm
(The adjusting screw has two positions.)
See "Adjusting Position of Roll Paper Near End Detector (factory
option)" (page 3-22).
Roll paper width: 760.5 mm (3"0.02") / 69.50.5 mm (2.74"0.02")
/ 57.50.5 mm (2.26"0.02")
Maximum diameter: 83 mm (3.27")
Core: When there is no near-end detector, always be sure to use roll paper
that is not glued to the core.
Normal paper
specifications:
Paper thickness: 1 sheet: 0.06 to 0.085mm {0.0024 to 0.0033"}
Weight: 52.3 to 64 g/m2{14 to 17 lb}
(45 to 55 kg/1000 sheets 1091 788mm)
Carbon paper
specifications:
Number of copies: Original 1 sheet + one copy sheet
Thickness: 0.05 to 0.08 mm {0.002 to 0.0031"}
(thickness of one sheet);
Recommended paper:
Paper by Mitsubishi - Carbonless paper (blue)
Top sheets:
N40Hi (paper thickness: 0.06mm {0.0024"},
mass: 47.2 g/m2{12.6 lb}
Bottom sheet
N60 (paper thickness: 0.08mm {0.0031"},
mass: 68.0 g/m2{18 lb}
The copying capability is affected by the ambient temperature, and is
guaranteed for the temperature ranges of 5 - 50°C {41 - 122°F}.

1-8 General Information
1.5.2.2 Printable Area
Printable area for 76 mm width paper
450 dots (180 dpi base)
300 dots (120 dpi base)
(6. 46) (6.4 1.5)
63.14
76
21.4
26
34. 2
Cutting position (manual cutter) (Type D)
Cutting position (autocutter) (Type B)
Cutting position ( emergency cutter) (Type B)
[Units: mm]

General Information 1-9
TM-U330 Technical Reference Guide
Printable area for 69.5 mm width paper

1-10 General Information
Printable area for 57.5 mm width paper

General Information 1-11
TM-U330 Technical Reference Guide
1.6 Other Specifications
1.6.1 Reliability
1.6.2 Environmental Conditions
Operating temperature and humidity range
Life: Mechanism: 10,000,000 lines
Print head: 200 million characters (using an average of 1 dot/wire per character).
(The printing pattern is Epson test pattern).
Autocutter: 1,000,000 cuts
End of life is defined as the point at which the printer reaches the beginning of the
wear-out period.
MTBF: 180,000 hours
Failure is defined as a Random Failure occurring at the time of the Random Failure
Period.
MCBF: 24,000,000 lines
This is an average failure interval based on failures relating to Wearout and Random
Failures up to the life of 10 million lines.
Temperature: During operation: 0 to 50 C {41 to 122 F}.
(At 34 C {93F} or higher, there are humidity restrictions as listed below. )
Humidity: During operation:10 to 90% (no condensation)
During storage:10 to 90% (no condensation; excludes paper and ribbon)

1-12 General Information
1.6.3 Installation
Install the printer horizontally as a basic position.The printer also must be installed so that it does not
move or vibrate during paper cutting or the drawer kick operation. Affixing tape is available as an option.
Vibration resistance: When packed:
Frequency: 5 to 55 Hz
Acceleration: 19.6m/s2{2 G}
Sweep: 10 minutes (half cycle)
Duration: 1 hour
Directions: x, y, and z
No external or internal damage should be found after the vibration test, and
the unit should operate normally.
Impact resistance: When packed:
Package: EPSON standard package
Height: 60 cm (2 feet)
Directions: 1 corner, 3 edges, and 6 surfaces
No external or internal damage should be found after the drop test, and the
unit should operate normally.
When unpacked:
Height: 5 cm (2")
Directions: Lift one edge and release it (for all 4 edges).
When the printer is not printing, no external or internal damage should be
found after the drop test.