LG KS20 - Main Microphone

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Only for training and service purposes
4. TROUBLE SHOOTING
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4.20 Main microphone
MIC (OSF213-42DC) → CN602 → CN400 → C106 → MIC1P(MSM7200)
Start
VMIC_BIAS(R102)
is 2.6V
Change main board
NO
Make a call
Change the MIC
NO
YES
Change the Main board
Make sound to MIC
Work well?
END
YES
NO
YES
Sine wave appears at
C106?