Ear-Mic Headset Mic Trouble Shooting - LG CE110 Service Manual

4.13 Ear-Mic Headset MIC Trouble Shooting

Disassemble the rear case of phone.
Connect the Ear-Mic Headset
to the Ear-Mic Socket of phone.
Check Soldering of L100,C111,
C306,C307, C308,VA300,R303,R304
YES
Check the status of R303.
Is itís voltage 2.5V?
YES
Check the soldering Pin #2
YES
U100(ABB) is broken.
Change the board.
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START
NO
L302 Is it O.K?
NO
NO
of CN300
- 89 -
4. TROUBLE SHOOTING
Re-solder
L100,C111, C306,C307,
C308,VA300,R303,R304, L302
U100(ABB) is broken.
Change the board.
Resolder Pin #2 of CN300
302
L
C306
C308
R304
R303
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