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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
CHECKING FLOW
START
Is the connection of
CN601 with LCD connector ok ?
YES
NO
Reassemble LCD connector
NO
Check the Voltage
Level of MLED1~%(TP01~05)are
about Battery voltage ? LCD BL Ctrl
(TP07)signal is high Level)
NO
YES
YES
Check the Waveform of EMI filter ?
(FL601,FL602,FL603,TP606)
Resoldering or Replace U601
NO
Resoldering EMI filter.
(FL601,FL602,FL603)
Does LCD work
properly ?
Replace LCD module
LCD working well !
YES