3. TROUBLE SHOOTING
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3.13.4 Main MIC Trouble Shooting
A Main MIC is located on Touch FPCB.
It operates in case of voice call (handset), voice recording, camcorder recording
START
Check the Mic signal by test mode
or Voice recording.
End
3. Check parts about
Mic Output (FB202)
works well ?
Change
the Touch FPCB. Voice signal OK?
2. Check parts about Mic Bias(1.77V)
(FB203) works well ?
Change Main Board
1. Check Mic
hole and mesh filter and Mic Cap.
Voice Signal OK?
No
No
No
Yes
Yes
Yes
Yes
No