LG -V909DW Service Manual page 93

MIC block diagram
MIC block diagram
*Main MIC
*Main MIC
MICROPHONE
MIC1300
1
P
2
G1
3
G2
4
O
SMD, TOP
LGE Internal Use Only
Wm8994
[cdec]
SCLK
CS/ADDR
CIFMODE
MCLK1
GPIO2/MCLK2
SPKMODE
REFFGND
MICBIAS1
MICBIAS2
VMIDC
AGND2
AGND3
HPOUT2N
HPOUT2P
MIC_BIAS
MIC_N
FB1300
MIC_P
600
C1303 C1304
33p 47p
F3
SDA
H1
G2
R802 100K
A4
R803 100K
D3
E1
A3
A5
A7
4.7u
B6
C815
C9
C816 4.7u
E7
E8
F9
F8
Check the voltage of (MIC_BAIS) TP
- 93 - Copyright © 2011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
GEN2_I2C_SDA
GEN2_I2C_SCL
AUDIO_MCLK1
AUDIO_MCLK2
MIC_BIAS
Only for training and service purposes