Microphone Trouble - LG 410G Service Manual

4.11 Microphone Trouble

TEST POINT
Check Points
-18pin IO connector
-Passive Parts soldering Status
TP1 (R214), TP2 (C222) : Mic path
-> Audio signal Check
CIRCUIT
MICIP
MICIN
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Only for training and service purposes
TP2
C220
0.1u
L200
C222 22n
100nH
C223
DNI
C224 22n
-53 3 -
MICBIAS
TP1
R214
1K
C221 R225
VA205
10u DNI
C217
39p
R227 0
C225
DNI
- 57 -
4. TROUBLE SHOOTING
TP1 TP2
L201
100nH
MIC200
1
OUT
2
G1
3
G2
4
G3
5
PWR
6
G4
SPM0204LE5-QB
LGE Internal Use Only