Headset Microphone - LG KP330 Service Manual

4. TROUBLE SHOOTING

4.20.8 Headset microphone

Headset C205
Make a call
EAR_SENSE_N
(VA605) is 0V?
Sine wave appears at
C205 ?
Change the Main board
LGE Internal Use Only
MIC2P(MSM6260)
Start
NO
YES
NO
YES
_
U S B _ D +
U S B _ D -
E A R _ S E N S E _ N
V B A T T
R E M O T E _ P W R _ O
U A R T _ T X
U A R T _ R X
Change the Main board
Change the headset or
Main board and retry
N
4
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4. Trouble Shooting
VA605
Only for training and service purposes