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4. TROUBLE SHOOTING
START
Check the MIC bias level
at the pad of MIC+(X503)
Is the level of MIC+ AND MIC-
2.4Volt ?
No
Does it work properly ?
END
Check the signal level
No
Yes
of the signal measured ?
Yes
YES
at C568 at the putting
Audio signal in MIC
Yes
No
A few hundred of mV
Yes
Change the main B,d
- 122 -
Resolder C566,C567, C568
and try again.
If fail again,
change the main Bíd
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