Epson TM-L90-i Use and care manual

Describes how to control the printer and necessary information
when you develop applications.
Describes setup and installation of the product and peripherals.
Describes how to handle the product.
Describes character code tables.
Describes features and general specifications for the product.
Technical Reference Guide
M00059604
Rev. E
Product Overview
Setup
Application Development Information
Handling
Appendix

2
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 Corpora-
tion 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
EPSON is a registered trademark of Seiko Epson Corporation.
Exceed Your Vision and ESC/POS are registered trademarks or trademarks of Seiko Epson Corporation.
Microsoftand Internet Explorerare either registered trademarks or trademarks of Microsoft Corpora-
tion in the United States and other countries.
microSD is registered trademarks of SD Card Association.
Wi-Fi, WPATM, and WPA2TM are either registered trademarks or trademarks of Wi-Fi Alliance.
All other trademarks are the property of their respective owners and used for identification purpose
only.
ESC/POS®Command System
EPSON has been taking industry’s initiatives with its own POS printer command system (ESC/POS).
ESC/POS has a large number of commands including patented ones. Its high scalability enables users
to build versatile POS systems. The system is compatible with all types of EPSON POS printers (excluding
the TM-C100) and displays. Moreover, its flexibility makes it easy to upgrade the future. The functionality
and the user-friendliness is valued around the world.
© Seiko Epson Corporation 2013-2015. All rights reserved.

3
For Safety
Key to Symbols
The symbols in this manual are identified by their level of importance, as defined below. Read
the following carefully before handling the product.
WARNING
You must follow warnings carefully to avoid serious bodily injury.
CAUTION
Provides information that must be observed to prevent damage to the equipment or loss of
data.
Possibility of sustaining physical injuries.
Possibility of causing physical damage.
Possibility of causing information loss.
Provides information that must be observed to avoid damage to your equipment or a
malfunction.
Provides important information and useful tips.

4
Warnings
WARNING
To avoid risk of electric shock, do not set up this product or handle cables during
a thunderstorm
Never insert or disconnect the power plug with wet hands.
Doing so may result in severe shock.
Handle the power cable with care.
Improper handling may lead to fire or electric shock.
Do not modify or attempt to repair the cable.
Do not place any heavy object on top of the cable.
Avoid excessive bending, twisting, and pulling.
Do not place the cable near heating equipment.
Check that the plug is clean before plugging it in.
Be sure to push the plug all the way in.
Be sure to use the specified power source.
Connection to an improper power source may cause fire or shock.
Do not place multiple loads on the power outlet.
Overloading the outlet may lead to fire.
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 your
dealer or a Seiko Epson service center 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.
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 power cord immediately and contact your
dealer or a Seiko Epson service center for advice.
If you open the DIP switch cover, be sure to close the cover and tighten the screw
after adjusting the DIP switch.
Using this product with the cover open may cause fire or electric shock.
Do not use aerosol sprayers containing flammable gas inside or around this
product.
Doing so may cause fire.

5
Cautions
CAUTION
Do not connect cables in ways other than those mentioned in this manual.
Different connections may cause equipment damage or fire.
Be sure to set this equipment on a firm, stable, horizontal surface.
The product may break or cause injury if it falls.
Do not use this product 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
Do not open the roll paper cover without taking the necessary precautions, as this
can result in injury from the autocutter fixed blade.
To ensure safety, unplug this product before leaving it unused for an extended
period.
When connecting external devices to the USB (including Micro-USB) connectors,
follow the precautions below.
Confirm the rated current of the external devices by checking the descriptions on the
devices or manuals. Do not use a device whose rated current is unclear.
Use the UL-approved external devices (only for North American users).
Connect the external devices only when those total rated current is less than 2.0A.

6
Wireless LAN (OT-WL01) Important Safety Information
Wireless LAN (OT-WL01) Usage Precautions
Wireless Telegraphy Act Regulations
The following acts are prohibited by the Wireless Telegraphy Act.
•Modifying and disassembling (including the antenna)
•Removing the label of conformance
WARNING
May exert electromagnetic interference on, and cause malfunction of, cardiac
pacemakers.
Before using this product, check that there is no one in the vicinity using a cardiac
pacemaker.
May exert electromagnetic interference on, and cause malfunction of, sensitive
medical equipment.
Before using this product, check that there is no sensitive medical equipment in the
vicinity.
Use of this product on aircraft may be restricted in some countries.
Before using this product, check that use of this product is not restricted on the aircraft.
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.
CAUTION
OT-WL01 is only for indoor use.
OT-WL01 should only be used for EPSON TM Intelligent Printers.
If it is installed on another device, it may result in computer failure, damage, or
malfunctions.
To comply with RF exposure compliance requirements, a distance of at least 20
cm must be maintained at all times between the antenna of OT-WL01 and people in
the vicinity.
Do not store in locations with high temperatures or high humidity.
It may in particular be damaged or deformed if left in a vehicle with the windows shut, or
placed in locations with unusually high temperatures for extended periods such as in
direct sunlight.
Do not get OT-WL01 wet.
This may cause malfunctions to occur.
Do not use near microwave ovens.
Wireless communication may be interrupted by electromagnetic interference generated
by microwave ovens.
Do not drop it, subject it to shocks, or place heavy objects on it.

7
Notes on Security when Using Wireless LAN
(Important informationoncustomer rights (maintaining privacy)
The advantage of using a wireless LAN over a LAN cable is that, because informationis
exchanged using radio signals, youcaneasily connectto the network if youare within range of
the radio signals. A disadvantage of this is thatwithin a certain range, the electromagnetic
signals canpass through barriers such as walls, so thatif security countermeasures are not
implemented in some way, problems such as the following may occur.
•Communicationdata canbe intercepted
A third party may be able to receive wireless transmissions without authorization, and they
could obtain personal informationfrom these transmissions such as IDs, passwords, or credit
card numbers, or they could interceptthe contents of personal e-mail messages.
•Unauthorized access to the network
A third party could access anindividual or intra-company network without permissionand
carry out any of the following activities.
Retrieve personal data or other secret information (information leakage)
Pose as another user and send inappropriate data (impersonation)
Overwrite the contents of intercepted data and resend it (falsification)
Introduce a computer virus which could cause data loss or system crashes (damage)
Initially, the possibility thatsuch problems could occur through settings concerning the
security of the wireless LAN productand by using the productare decreased, because the
wireless LAN card and the access point have security measures to deal with these problems.
We recommend thatyouuse this productafter making security settings using our own
judgement and assuming full responsibility, and with your full understanding of problems
thatmay occur if youdo notmake any security settings.
Notes on Setting SSID (Service Set Identifier)
For protectionof security, note the following precautions whensetting the SSID.
•Change the SSID from the defaultsetting.
•Donotsettexts by which the owner canbe identified as the SSID.
Notes on Setting Cryptographic Key
For protectionof security, note the following precautions whensetting the cryptographic key.
•Avoid using words ona dictionary as practicably as possible.
•Combine meaningless alphanumeric characters and symbols.
•Usetexts consisted of atleast13 characters or more or of 20 characters or more if possible.

8
Restriction of Use
Whenthis productis used for applications requiring high reliability/safety, such as
transportationdevices related to aviation, rail, marine, automotive, etc.; disaster prevention
devices; various safety devices, etc.; or functional/precisiondevices, etc., youshould use this
productonly after giving considerationto including fail-safes and redundancies into your
design to maintain safety and total system reliability. Bec ause this productwas notintended for
use in applications requiring extremely high reliability/safety, such as aerospace equipment,
main communicationequipment, nuclear power control equipment, or medical equipment
related to directmedical care, etc., please make your ownjudgment onthis product's suitability
after a full evaluation.

9
About this Manual
Aim of the Manual
This manual was created to provide informationondevelopment, design, and installationof
receiptissue systems and development and design of printer applications for developers.
Manual Content
The manual is made up of the following sections:
Chapter 1 Product Overview
Chapter 2 Setup
Chapter 3 Application Development Information
Chapter 4 Handling
Appendix Character Code Tables

10
Contents
■For Safety .............................................................................................................................. 3
Key to Symbols........................................................................................................................................3
Warnings ..................................................................................................................................................4
Cautions ..................................................................................................................................................5
Wireless LAN (OT-WL01) Important Safety Information .......................................................................6
Wireless LAN (OT-WL01) Usage Precautions ........................................................................................6
■Restriction of Use .................................................................................................................. 8
■About this Manual ................................................................................................................ 9
Aim of the Manual .................................................................................................................................9
Manual Content .....................................................................................................................................9
■Contents.............................................................................................................................. 10
Product Overview ........................................................................15
■Features............................................................................................................................... 15
■Product Configurations ...................................................................................................... 17
Autocutter .............................................................................................................................................17
Colors.....................................................................................................................................................17
Accessories ...........................................................................................................................................17
■Part Names and Functions ................................................................................................ 18
Power Switch.........................................................................................................................................18
Power Switch Cover .............................................................................................................................19
Control Panel ........................................................................................................................................19
Connectors ...........................................................................................................................................21
Offline.....................................................................................................................................................23
■Error Status........................................................................................................................... 24
Automatically Recoverable Errors ......................................................................................................24
Recoverable Errors ...............................................................................................................................25
Unrecoverable Errors............................................................................................................................26
No Connection to External Devices...................................................................................................27
■NV Memory (Non-Volatile Memory) ................................................................................ 28
NV Graphics Memory ..........................................................................................................................28
User NV Memory...................................................................................................................................28
Memory Switches .................................................................................................................................28
User-defined Page................................................................................................................................28
Maintenance Counter.........................................................................................................................29
Paper layout settings............................................................................................................................29