Self Test
Method: When printer is connected power, turn off, press "FEED" button and turn on at the same time, 2 seconds later release "FEED" button, a completed self test will be printed out to show printer settings.
Method to enter hexadecimal mode
Method: When printer is connected power, press"FEED" button and turn on at the same time for about 10 seconds, release "FEED" button to enter data hex dump mode, it will print "Hexadecimal Dump"on the paper.
Reset
Method: When printer is connected power, press"FBED" button and turn on at the same time for about 20 seconds, reset suceeed if beeper peals.