Headset Microphone - LG L705i Service Manual

4. TROUBLE SHOOTING

4.18 Headset microphone

Headse → C501 → MIC2P(MSM6280)
Change the headset and retry
VREG_MSMP is biased
Sine wave appears at
Change the Main PCB
LGE Internal Use Only
Start
Make a call
NO
EAR_SENSE_N
(D501) is 0V?
Yes
by 2.7V? (R503)
Yes
C501 ?
Yes
- 118 -
OK
END
YES
NO
Change the MAIN board
NO
Change MAIN board
NO
Change the headset or
Main board and retry.
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