Headset Microphone - LG CU500 Service Manual

4.19 Headset microphone

Headset → C106 → MIC2P(MSM6275)
Change the headset and retry
VREG_MSMP is biased
Sine wave appears at
Change the Main B'd
Start
Make a call
NO
EAR_SENSE_N
(R109) is 0V?
Yes
by 2.6V? (R100)
Yes
C106 ?
Yes
- 113 -
4. TROUBLE SHOOTING
OK
END
NO
Change the headset or
SUB board and retry.
NO
Change MAIN board
NO
Change the headset or
SUB board and retry.
YES
NO