Chapter 1 — Using the PB21 and PB31 Mobile Receipt Printer
PB21 and PB31 Mobile Receipt Printer User Guide 23
3 Release both buttons. The printer performs a test feed (sensor
calibration), prints, and then enters Dump mode.
The printer is now in Dump mode and it scans the
communication ports. Any characters received on the
communication ports are printed.
4 Press Feed to exit Dump mode.
After you exit Dump mode, the printer returns to Ready mode. For
more information on Dump mode, see “Troubleshooting
Communication Problems” on page 58.
Using Extended Test Mode
Use Extended Test mode to run additional diagnostic tests, entering
Dump mode, and resetting to factory defaults.
Sample Extended Test Mode Screen
To enter Extended Test mode
1 Make sure that the printer is loaded with media.
2 Press the media cover release button to open the media cover.
3 Press the Standby button to turn the printer off.
4 Press Feed and Standby buttons at the same time until CLOSE
PRINTER DOOR appears on the screen.
5 Close the media cover. You are now in Extended Test mode:
• Press to cycle through the options.
• Press to select a test option.
• Press to exit Extended Test mode.
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