How to Perform a Self-Test on TM-U220 POS Receipt Printer

TM-U220 POS Receipt Printer Self Test Procedure :

1. Make sure the printer is turned off and the roll paper cover is closed properly.
2. While holding down the FEED button, turn on the printer using the switch on the front of the printer. The self test prints the printer settings and then prints the following, cuts the paper, and pauses. (The PAPER OUT light blinks.) If you want to continue SELF-TEST printing, Please press the FEED button.
3. Press the FEED button to continue printing. The printer prints a pattern using the built-in character set.
   
4. The self test automatically ends and cuts the paper after printing the following :
   * completed *
   The printer is ready to receive data as soon as it completes the self test.

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