LG GD330 - Ear-MIC Headset MIC Trouble Shooting

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4. TROUBLE SHOOTING
4.14. Ear-Mic Headset MIC Trouble Shooting
U301 is broken.
Change the board.
NO
YES
NO
Re-solder
C300,FB303,
FB100,C305
NO
Disassemble the rear case of phone.
Connect the Ear-Mic Headset
to the Ear-Mic Socket of phone.
Check Soldering of
C300,FB303,
C303
Is it O.K?
Check the TP2
Is it normal state voltage 1.8V?
Check the soldering TP1
of CN301
U100(ABB) is broken.
Change the board.
YES
START
Resolder Pin #2 of CN300
YES
CN301
FB303
C300
C303
R324
TP2
TP1