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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
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
START
Is the connection of
CN500 with LCD connector ok ?
YES
NO
Reassemble LCD connector
NO
Check the Voltage Level of
C325 is about Battery voltage ?
(SWIF signal is high Level)
NO
YES
YES
Check the Waveform of
EMI filter ?
Resoldering or Replace U302
NO
Resoldering EMI filter.
(FL301,FL303,FL305)
Does LCD work
properly ?
Replace LCD module
LCD working well !
YES
CHECKING FLOW
Is the connection of
CN103 with CN302 connector ok ?
YES
NO
Reassemble FPCB with Main connector
NO
YES
Check the Waveform of
Data pins on CN105 ?
Replace Main FPCB
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