- LG Cell Phone User Manual

4. TROUBLE SHOOTING
- 113 -
4.19 Main microphone
MIC400 → MIC1P, MIC1N (MSM6245)
Start
MIC_BIAS(C416)
is 1.8V
Change main board
NO
Make a call
Change the MIC
NO
YES
Change the Main board
Make sound to MIC
Work well?
END
YES
NO
YES
Sine wave appears at
C418/C419?