Printer Set-up guide
Troubleshooting
Run the Self Test
Changing the Printer Settings
Connecting the Interface
Returning for Service


TM Series Printers Troubleshooting

Troubleshooting printers involves identifying and isolating the problem then applying the solution

Printer won't print
 
Confirmation Diagnosis Possible Solution
Lights don't light when printer is turned on Power supply not plugged in Plug in supply, check line cord, outlet
  Power supply is bad Replace with other P/S; check P/S voltage (24VDC); replace P/S
  Printer switch/main board or fuse is bad Return for service
 
Lights turn on but flash Problem on main board Run self test; if fails return for service
 
Lights turn on Not connected to printer Install cable; connect interface
  Wrong cable Check cable or adapter; Connect interface
  Interface not set correctly Print out settings on self test; change DIP settings
  Driver not installed Install driver on Computer
  Driver not correctly configured Verify port settings for the Interface installed
 Tip: Have more than 1 printer? If you do and think you have a problem with a printer, replace it with the working printer. If the problem is solved, then the problem is probably with the printer. If the problem persists then the problem lies elsewhere. Check the cable, the port, the drivers and the computer.

Printer prints garbage
 
Confirmation Diagnosis Possible Solution
Printer prints garbage characters when it should be printing text Printer or computer/scale/etc. have different settings Printer and computer interface settings must be same
 
Printer prints garbage characters at random times Some other process is accessing the port Check for other programs or printers that may be trying to access the same port
 
Printer prints garbage characters at computer startup Windows is querying the port Turn off printer along with computer; Most printers can be configured to only print characters it understands. See printer DIP switch settings.


Running Self-Test on TM-Series Printers

Any time that you want to check the performance of your printer you can run the self test described below. This shows whether your printer is working correctly. It is independent of any other equipment or software.

Note: Be sure to install the ribbon cassette (for non-thermal printers) and the paper roll (for receipt printers) before you run the self test. We also recommend that you disconnect the data cable (leave the power cable plugged-in) from the printer.

  1. To perform the self test, hold down the PAPER FEED button while you turn on the printer with the power switch.

  2. The printer prints the current printer settings including interface settings and then the PAPER OUT light blinks to indicate that the printer is in the test printing standby state. To see more about the information printed out, see the respective interface section.

  3. Press the PAPER FEED button to start the second part of the test, in which the printer prints a pattern using the built-in character set.

  4. After the printer completes a certain number of lines, it prints the following:

    *** completed ***

    Then it enters the normal mode.

Note: If you want to pause the self test manually, press the PAPER FEED button. Press the PAPER FEED button again to continue the self test.


Changing the Settings on Printer

The settings on TM series printers can be changed with a series of DIP switches located on the bottom of the printer. Select the printer for DIP switch settings.


TM-T88II

TM-T88III

TM-T88IV

TM-U220A

TM-U220B

TM-U220D

TM-290

TM-U295

TM-U375

TM-U590

TM-U675

TM-U200

Connecting the Interface to Computer

The connection procedure is dependent on the type of interface installed. With the exception of the TM-U295 and TM-U375 The TM series printers use a common series of interface cards. The installation of the interface involves connecting, configuring and testing the printer and the computer. Choose the type of interface installed on the printer to find the procedure. 

Interface Type Connector on Printer Link
Serial Interface Installation Guide
Parallel Interface Installation Guide
USB Interface Installation Guide
Ethernet Interface Installation Guide
Wireless Interface Installation Guide
IDN Installation Guide

Returning Printer for Service

  • Consult this page to see if you can resolve the issue yourself.

  • Check if the printer is covered under warranty. If covered, return to Epson authorized service center.

  • For out of warranty repairs, consider Beagle Hardware.


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