LG KG290 - Microphone Trouble

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.13 Microphone Trouble
TEST POINT
CIRCUIT
MIC_PATH_SEL
MIC
AD6721
AIT813G
L
H
C216
1u
C228 0.1u
C219
39p
R231 100ohm
39p
C223
R221
1K
C215
10u
C235 39p
C217
100K
VA204
EVL5M02200
NC1
5
7
NC2
2
NO1
10
NO2
1
VCC
NLAS5223BMNR2G
U204
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
R227
2.2K
2V8_VMEM
100ohmR232
EVL5M02200
VA203
39p
2V5_VMIC
C234
R234
2.2K
C222
39p
OB4-15L42-C33L
1
2
MIC200
MIC_P
MIC_N
MIC_P
MIC_N
MIC_PATH_SEL
MIC_PATH_SEL
VINNORP
VINNORN
MULTI_MIC_P
MULTI_MIC_N