Brother CS5055PRW - Does Not Operate When the Foot Controller Is Used

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Failure Investigation
for Electronic Parts
Does not operate when the foot controller is used
Does not operate when the foot controller is used.
Replace the foot controller
jack assy.
N
Is the resistance between pin 2 and 3 on the
foot controller jack assy. connector normal?
• Foot controller disconnected : 1Ω or less
• Foot controller connected : more than 1MΩ
Y
Replace the foot controller.
or
Replace the foot controller
jack assy.
N
Y
When the foot controller is connected
and press down the foot controller,
does the resistance between pin 1
and 3 on the foot controller jack assy.
connector 1K-51KΩ?
Replace the main PCB assy.