Microphone Trouble - LG KF350 Service Manual

4.7 Microphone trouble

Check Points
-Microphone hole
-Mic. Bias & signal line
CN301
1 44
2 43
3 42
4 41
5 40
6 39
7 38
MAIN_MIC_P
MAIN_MIC_N
VMIC_P
MAIN_MIC_N
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VBAT VUSB_USB
MIC100
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
SPM0204LE5-QB
CN301
C329
C328
4. TROUBLE SHOOTING
0.1u
0.1u
VA301 VA302
C327
MIC100
- 77 -
C327
MAIN_MIC_P
MAIN_MIC_N
C328
VMIC_P
100nH L305
C330 C329
2.2u 27p
VMIC_N
LGE Internal Use Only