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Lcd Display Is Not Normal - Brother NV-10A Service Manual

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Failure Investigation for Electronic Parts LCD display is not normal
Is the FFC of the single light guide
assy. correctly connected to CN1 of
the operation PCB assy.?
Is the connector of the single light
guide assy. correctly connected to
CN3 of the operation PCB assy.?
Is the connector of operation PCB
assy. correctly connected to CN4 of
the main PCB assy.?
Is the voltage between pins 2 & 3 of
CN1 on the operatrion PCB assy.
connector approximately 5 V AC?
5 - 14
No LCD display
Y
Y
Y
Y
Replace the single light guide assy.
or
Replace the main PCB assy.
N
Reconnect it correctly
N
Reconnect it correctly
N
Reconnect it correctly
N
Replace the power PCB assy.

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