Lcd Light Does Not Come On - Brother NV-10A Service Manual

Failure Investigation for Electronic Parts LCD light does not come on
Is the connector of the single light
guide assy. correctly connected to CN3
of the operation PCB assy.?
Is the connector of the operation PCB
assy. correctly connected to CN4 of the
main PCB assy.?
Is the voltage between pins 1 & 2 of
CN3 on the operation PCB assy.
connector 3.8 – 4.6 V DC?

LCD light does not come on

Y
Y
Y
Replace the single light guide
assy.
N
Reconnect it correctly
N
Reconnect it correctly
N
Replace the operation PCB
assy.
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