Microphone Trouble - LG GS290 Service Manual

GS290 Operational Description
GS290 Operational Description

4.7 Microphone trouble

4.7 Microphone trouble
Check Points
-Microphone hole
Check Points
-Mic. Bias & signal line
-Microphone hole
-Mic. Bias & signal line
TP2
TP2
MAIN_MIC_P
TP2
MAIN_MIC_N
VMIC_P
VMIC_N
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MIC
FB305
BLM15AG121PN1
FB306
BLM15AG121PN1
TP1
TP1
L303
TP1
C322 C318
C307
47p
27p
27p
MIC101
MIC101
76/136
76/136
C373 22n
C374 22n
100n
C314
VA300 VA302
1u
TP1
TP1
L303
TP2
L303
TP2
FB305
FB306
FB305
FB306
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4. TROUBLE SHOOTING
Revision B
Revision B
MIC300
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
SPM0410LR5H-QB
LGE Property
LGE Internal Use Only
LGE Property