LG GS290 - Microphone Trouble

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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 76/136 LGE Property
4.7 Microphone trouble
Check Points
-Microphone hole
-Mic. Bias & signal line
FB305
FB306
L303
MIC101
TP1
TP1
TP2
TP2
GS290 Operational Description Revision B
LG Electronics 76/136 LGE Property
4.7 Microphone trouble
Check Points
-Microphone hole
-Mic. Bias & signal line
FB305
FB306
L303
MIC101
TP1
TP1
TP2
TP2
C307
27p
C314
1u
VA300
C318
47p
100n
L303
27p
C322
VA302
MIC300
SPM0410LR5H-QB
6
5
4
3
2
1
OUT
G1
G2
G3
PWR
G4
22nC373
22nC374
BLM15AG121PN1
FB305
BLM15AG121PN1
FB306
VMIC_P
VMIC_N
MAIN_MIC_P
MAIN_MIC_N
MIC
TP2
TP1