Brother GT-3 Series Service Manual page 173

6. Replacing Parts
Adjustment
1.
Turn ON the printer and execute the I/O Check. (Refer to "3-1-3. How to go to Advanced Menu".)
2.
Confirm the Flap on the Display; ON when you lower the Sensor Flap to the lowest bottom with your
hand, OFF when the Sensor Flap moves by approx. 0.5mm naturally when you release your hand. If the
Flap Sensor will not switch OFF/ON, then loosen the Nut (11) and rotate the Bolt Socket (12) to adjust
the switching position.
Lower the Flap to the lowest bottom
ON
It moves back naturally by 0.5 mm.
164
OFF
GT-3 Series