Bobbin Winding Cannot Be Done - Brother NX600 Service Manual

Failure Investigation for Electronic Parts Bobbin winding cannot be done.
Is the bobbin winder mechanism
assembled and attached correctly?
Is the resistance between the bobbin
winder assy. connector pins 1 & 2
normal?
• Bobbin winder shaft in bobbin wind
position .......... 1 Ω or less
• Bobbin winder shaft not in bobbin
wind position ... ∞
Bobbin winding cannot be
done.
Y
Y
Replace main F3D PCB assy.
Adjust the bobbin winder
N
mechanism for correct
assembly and attachment
N
Replace BW switch assy.
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