LG KP260 - Page 63

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