Main Motor Does Not Turn - Brother NX600 Service Manual

Failure Investigation for Electronic Parts Main motor does not turn
Is the NP F2 (or F1) PCB assy.
connector correctly connected to CN2
on the main F3D PCB assy.?
5 - 6
From previous page
Is the presser foot lifter shaft down?
Y
Is the presser switch resistance
normal?
• Presser switch resistance
Switch depressed ... 1 Ω or less
Switch out ............. ∞
Y
Y
• Replace operation F3 PCB assy.
or
• Replace main F3D PCB assy.
or
• Replace power supply F
N
Lower the presser foot lifter.
N
Replace switch assy.
N
Reconnect it correctly