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4. TROUBLE SHOOTING
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4.20 Headset microphone
Headset → C210/C211 → MIC2P, MIC2N (MSM6245)
Start
HOOK_KEY is detected?
Yes
END
Make a call
Change the MAIN board
MICBIAS is biased
by 1.8V?
Change the Main board
Yes
OK
NO
NO
NO
Change the headset and retry
YES
Sine wave appears at
C210/C211 ?
Change the headset or
Main board and retry.
NO
Yes
Change the MAIN board