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Bobbin Winding Cannot Be Done - Brother NV-10A Service Manual

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Failure Investigation for Electronic Parts Bobbin winding cannot be done
Is the bobbin winder mechanism
assembled and attached correctly?
Is the connector of the BW-F SW assy.
correctly connected to CN1 of the main
PCB assy.?
Is the resistance between the BW-F
SW assy. connector pins 1 & 2
normal?
• Bobbin winder shaft in bobbin wind
• Bobbin winder shaft not in bobbin
5 - 16
Bobbin winding cannot be
done.
Y
position .......... 1 Ω or less
wind position ... ∞
Y
Replace the main PCB assy.
Adjust the bobbin winder
N
mechanism for correct
assembly and attachment
N
Reconnect it correctly
N
Replace BW switch assy.

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