
- 88 -
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
CN302with LCD connector ok ?
NO
Reassemble LCD connector
NO
Check the Voltage Level of
TP1 is about Battery voltage ?
(SWIF signal is high Level)
NO
YES
Check the Waveform of
EMI filter ?
Resoldering or Replace U301
NO
Resoldering EMI filter.
(FL303,FL304,FL305)
Does LCD work
properly ?
Replace LCD module
LCD working well !
YES
YES
YES