Epson TM-T20II Technical Reference Manual page 73

Starting the self-test mode
Follow the steps below to run this mode.
1
Close the roll paper cover.
2
While pressing the Feed button, turn on the printer. (Keep pressing the
Feed button until the printer starts printing.)
The printer starts printing current status of the printer.
When the printer finishes printing the printer status, the following message is printed and
the Paper LED flashes. (The printer is now in the self-test wait mode.):
"Select Modes by pressing Feed button.
3
Press the Feed button to start the test print (less than 1 second).
The printer starts test printing. (A rolling pattern is printed using only the resident
character set.)
If you select "Mode Selection," the printer goes to
(page 74),
Mode" (page
After the test printing has finished, the printer prints the following message, and then the
printer is initialized and returned to the normal mode.
Continue SELF-TEST: Less than 1 second
Mode Selection: 1 second or more"
"Receipt Enhancement Information Print Mode" (page
78).
"*** completed***"
Chapter 3 Application Development Information
"NV Graphics Information Print Mode"
76), or "Software Setting
3
73