Only For Training And Service Purposes - LG GB220 Service Manual

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

Only for training and service purposes

- 84 - Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes