Main Microphone - LG KB770 Service Manual

4.19 Main microphone

MIC101 VA607
Make a call
MIC_BIAS(C616)
is 1.8V
Make sound to MIC
Sine wave appears at
VA607?
Change the Main board
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MIC1P(MSM6280)
Start
NO
YES
NO
YES
NO
Change main board
Change the MIC
Work well?
- 121 -
4. TROUBLE SHOOTING
YES
END
LGE Internal Use Only