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Brother NV-10A Service Manual Page 183

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Failure Investigation for Electronic Parts Error is displayed
Are the foot controller jack assy. lead
wires broken?
Is the foot controller jack assy. correctly
connected to the main PCB assy.
(CN3)?
When the foot controller is replaced
with a new one, does it work
correctly?
"F4" is displayed
N
Y
Y
Replace the foot controller
Y
Replace the foot controller jack
assy.
Correctly connect the foot
N
controller jack assy. to the main
PCB assy. (CN3)
N
Replace the main PCB assy.
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