LG GX300 Service Manual page 99

4. TROUBLE SHOOTING
CHECKING FLOW
START
Is the connection of
S501 with Camera ok ?
YES
Check the each voltage Level of
TP1(1.8V), TP3(2.8V),
TP2(1.5V) is right ?
YES
Check the Waveform of
I2C_CLK(TP5), I2C_DATA(TP6) ?
YES
Check the 13MHz of
CAM_MCLK(TP7) ?
YES
Check the Waveform of
Data pins on S501 ?
YES
Does Camera work
properly ?
YES
Camera working well !
LGE Internal Use Only
NO
Reassemble camera connector
with camera.
NO
Resoldering or Replace U500, 502
NO
Resoldering R132, R133
NO
Replace U102 or Change the board
NO
Replace Camera Module.
NO
Replace U102 or Change the board
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4. TROUBLE SHOOTING
Only for training and service purposes