LG KP260 Service Manual page 63

4. TROUBLE SHOOTING
CHECKING FLOW
Is the connection of
FPCB with connector on
Main PCB(CN302) ok ?
Is the connection of
LCD with connector on
KEY PCB(CN100) ok ?
Is Voltage TP1 2.8V?
CN302 on Main PCB or
CN100 on KEY PCB ?
YES
Change the FPCB and try again
Check the soldering of
LCD working well !
LGE Internal Use Only
START
YES
YES
Check the soldering of
YES
EMI filter ?
YES
Does LCD work
properly ?
YES
NO
Reassemble FPCB with CN302 connector
NO
Reassemble LCD with CN100 connector
NO
Replace U403
NO
Resolder CN302 on Main PCB or CN100 on KEY PCB
NO
Resoldering EMI filter
(FL300,FL301,FL302)
NO
Replace LCD module
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