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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
CHECKING FLOW
START
YES
Is Voltage TP1 2.8V?
NO
Replace U401
Check the soldering of
CN305 on Main PCB?
NO
YES
YES
Check the soldering of
EMI filter ?
Resolder CN305 on Main 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
Main PCB(CN305) ok ?
NO
Reassemble LCD with CN305 connector