LG U8120 Service Manual page 116

4. TROUBLE SHOOTING
START
Check the MIC b ias level
at the pad of MIC+(X2603)
2
No
Check the signal level
Is the level o f M IC+ AND MIC-
at C2615 at the putti ng
1
2.2Volt ?
Audio signal in MIC
Yes
Yes
3
Resolder C2615, C2617, C2616
No
A few hundred of m V
and try again.
of the signal measured ?
If fail again,
chage the main Bíd
Change t he MIC
Yes
Change the main B,d
Yes
No
Does it work p roperly ?
YES
END
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