Main Microphone - LG KS20 Operating Instructions Manual

4. TROUBLE SHOOTING

4.20 Main microphone

MIC (OSF213-42DC) → CN602 → CN400 → C106 → MIC1P(MSM7200)
Start
Make a call
VMIC_BIAS(R102)
is 2.6V
Make sound to MIC
Sine wave appears at
C106?
Change the Main board
LGE Internal Use Only
NO
YES
NO
YES
NO
- 130 -
Change main board
Change the MIC
YES
Work well?
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Only for training and service purposes
END