LG KC780 Service Manual page 78

START
Check LCD connector
combination then LCD
with New LCD
Is F-LCD
normal?
Are insulators
on LCD and Key
Signal is normal in
2.62V(TP4) Signal
On CN301
Signals are normal in
DIF_CD(TP1),CS(TP2)
,WR(TP3),
On CN301
Assemble
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Only for training and service purposes
test
Yes
PCB
Yes
Yes
Yes
N
Replace F-LCD
N
Replace Insulators
Check solder and
N
repair CN301
N
Check solder and
repair FL303
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5. TROUBLE SHOOTING
LGE Internal Use Only