Main Microphone - LG U370 Service Manual

4.17 Main microphone

MIC400 → C407,C409 -> MIC1P, MIC1N (MSM6245)
Start
Make a Call
MIC_BIAS (C400) is 1.8V ?
YES
Make Sound to MIC
Wave appears at
C407, C406 ?
YES
Change the Main board
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Only for training and service purposes
NO
Change the Main Board
NO
Change the MIC
NO
Wave appears at
C407, C406 ?
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4. TROUBLE SHOOTING
YES
END
LGE Internal Use Only