6-6
3. Checking the back light unit
NG
NG
OK
NG
OK
Is 12V-source voltage provided
to pins 1 and 2 of P804 in SW
REG board?
Failure point
Check the ON/FF signal of equal “H” at J901 pin3?
Check F901 open
Failure point
F901 failure. Replace the
inverter board
Failure point
1) Inverter cable disconnection.
2) C915, C955 open
NG
1) u-p failure
2) printed wire broke between u-p trace to P804 pin3
Is 12V-source voltage provided
to pins 1 and 2 of J901 in
inverter board?
OK
NG
Failure point
Inverter cable disconnection.
Error in SW REG board.
OK
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