Only For Training And Service Purposes - LG GX300 Service Manual

CHECKING FLOW
START
<Play any Sound file>
Check the Audio signal of
TP1, TP2. is it ok?
Yes
Check the Audio signal
TP3, TP4. is it ok?
Yes
Check the Audio signal
CN101. Is it ok?
Yes
The Sound is playing
through the Speaker?
Yes
Speaker
Working well!!
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Only for training and service purposes

No
Re download the board
Or Replace of U102(BaseBand chip)
No
Check the signal of I2C
CLK, DATA. Is it ok?
Yes
Replace or Change
U202&U207
No
Replace or Change the FPCB
No
Re-soldering or replace
speaker.
103/158
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4. TROUBLE SHOOTING
2. TROUBLE SHOOTING
Re-soldering or
No
Replace TP5, TP6
LGE Internal Use Only