Only For Training And Service Purposes - LG GS155 Service Manual

CHECKING FLOW
START
Is the connection of
CN401 with LCD connector ok ?
YES
Check the Voltage Level of
C406 and C408 is about Battery voltage ?
(W_LED_DRV signal is 1 Pulse( about 75us))
YES
Check the Waveform of
Data pins on CN401 ?
YES
Does LCD work
properly ?
YES
LCD working well !
Copyright © 2010 LG Electronics. Inc. All right reserved.

Only for training and service purposes

4. TROUBLE SHOOTING
NO
Reassemble LCD Module and
check LCD Module connection
NO
Resoldering or Replace U402
NO
Replace U101
NO
Replace LCD module
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4. TROUBLE SHOOTING
LGE Internal Use Only