LG -V909DW Service Manual page 96

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U803
1
VDD
VOUT
2
CE
GND
R848
HOOK_ADC
LGE Internal Use Only
R846
C830
C831
2.2K
10u
33p
0
EJ_MIC
Check the waveform of M4D_DETECT [TP]
EAR_SENSE
R847
18K
M4D_Detect : Low
Check the voltage of (EJ_MIC_BIAS) TP
VDD_3V3_ALWAYS
HS_MIC_BIAS_EN
C827
R854
18K
2.2u
- 96 -
4. TROUBLE SHOOTING
VDD_1V8
Q800
R845
1M
TP1
M4D_DETECT
U803
4
1
VDD
VOUT
3
2
CE
GND
1.6V
R848
0
HOOK_ADC
Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
EAR_SENSE
C830
R846
C831
2.2K
10u
33p
TP2
EJ_MIC
R
1

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