Does Not Operate When The Foot Controller Is Used - Brother NV4000D Service Manual

Failure Investigation for Electronic Parts Does not operate when the foot controller is used
Does not operate when the foot controller is
used.
Is the resistance between pins 2
and 3 on the foot controller jack
assembly connector normal?
Foot controller disconnected : 1Ω or less
Foot controller connected : ∞
Is the lead wire of the foot controller
jack assembly free from damage?
Is the foot controller jack assembly
correctly connected to the panel
PCB assembly (CN9)?
When the foot controller is replaced
with a new one, does it work correctly?
Y
Y
Y
Y
Replace the foot controller.
N
Replace the foot controller
jack assembly.
N
Replace the foot controller
jack assembly.
N
Replace the main motor
N
Replace the panel PCB
assembly.
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