LG -E455 Service Manual page 140

4.8.4 Main Mic
Main Mic located on Lower FPCB.
It's operating voice call(except speakerphone), voice recording, camcorder recording
LGE Internal Use Only
START
Check the Mic signal by test mode
or Voice recording.
Check Mic hole & rubber to
make the voice signal?
No
Reconnect or change
FPCB connector. Voice signal OK?
No
Check parts about Mic Bias
Mic works well?
No
Change MT6575(U200).
Mic works well?
No
Change Main Board
END
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4. TROUBLE SHOOTING
Yes
Yes
Yes
Yes
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