To calibrate the ribbon and Gap/Black Mark Sensor:

1. Turn off the printer.
2. Press and hold the Feed/Pause Button and then turn on the printer.
3. Release the button when the LED is lit in red/amber (blinks 5 times alternately).
   The LED color will change in the following order:
   Amber (lit) > Red/Amber (blinks 5 times alternately) (Release the button here) > Amber (5 times) > Green/Red (blinks 5 times alternately) > Green (5 times) > Red (5 times) > Green (lit)

   To select the sensor for calibration, send the correct command to the printer:

   • For the Gap Sensor: the GAP command
   • For the Black Mark Sensor: the BLINE command

   You can also calibrate by using the BPM (Brother Printer Management Tool).