LG LG-K430DSF - Page 66

66
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3. TROUBLE SHOOTING
Check FB6208, VMIC voltage level (C6221)
3.10.2 Audio_Main MIC
It’s operating voice call(except speakerphone), voice recording, camcorder recording.
Checking Flow
Image
Circuit Diagram
Check Main Mic rubber
Check the Mic signal by test mode
or Voice recording.
Start
Check Mic hole &
rubber to make the
voice signal?
No
Check parts about
Bias and signal
Mic works well?
Yes
Yes
No
Reconnect or
change Mic Voice
signal OK?
Yes
No
Change
MT6328(U4100).
Mic works well?
No
Yes
End
Change Main Board