Self-Test Mode - Epson TM-P20 Technical Reference Manual

In 1 and 2, the following guidances are printed, the
1. Continuing self-test guidance

Self-test mode

You can check the following items using the self-test.
 Firmware version
 Interface information
 Loaded font
 Maintenance information (head mileage)
Follow the steps below.
1
Close the roll paper cover.
2
While pressing the FEED button, turn on the printer. (Hold down the FEED button
until printing starts.)
After printing the current print status, a Continuing self-test guidance is printed, and the
LED flashes.
3
Briefly press the FEED button (less than one second) to continue the self-test.
The printer prints a rolling pattern on the roll paper, using the built-in character set.
After "*** completed ***" is printed, the printer initializes and switches to standard mode.
Power LED flashes, and instructs the user's operations.
2. Mode selection guidance
Chapter 3 Advanced Usage
Power
55
3