Does Not Operate When The Foot Controller Is Used - Brother XR9000 Service Manual

Failure Investigation
for Electronic Parts

Does not operate when the foot controller is used.

Is the resistance between pins 2 & 3 on the
foot controller jack assy. connector normal?
• Foot controller disconnected : 1Ω or less
• Foot controller connected : more than 1MΩ
When the foot controller is connected
and press down the foot controller,
does the resistance between pins 1 &
3 on the foot controller jack assy.
connector vary 1-51KΩ?
5 - 12
Does not operate when the foot controller is used
Y
Y
Replace the main PCB assy.
N Replace the foot controller
jack assy.
N
Replace the foot controller.
or
Replace the foot controller
jack assy.