Does Not Operate When The Foot Controller Is Used - Baby Lock BLSY 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 card
PCB assembly (CN10)?
Is FFC connected correctly between
the main PCB (CN23) and the card
PCB (CN9)? Are the upper and lower
connector locks applied correctly?
Are FFCs connecting the main PCB (CN23)
to the card PCB (CN9) free from breakage?
When the foot controller is replaced
with a new one, does it work correctly?
Y
Y
Y
Y
Y
Y
Replace the foot controller.
N
Replace the foot controller
jack assembly.
N
Replace the foot controller
jack assembly.
N
Connect it properly.
N
Connect it properly.
N
Replace the card
assembly.
N
Replace the main
assembly.
PCB
PCB
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