LG KG320 - Microphone Trouble

4. TROUBLE SHOOTING
- 87 -
4.12 Microphone Trouble
TEST POINT
CIRCUIT DIAGRAM
C118
R103,R104
R105
R116
C106
(1608)
CLOSE TO AD6537B
(1%)
GPIO40
(1%)
1uC123
2V8_VEXT
C135
1u
C136
C118
1uC116
1uC113
2V75_VVCXO
1V8_VRTC
100R102
TP102
2V5_VMIC
C137
R101 1.2M
C132
VBAT
1uC124
0.01uC125
TP100
1uC122
1uC119
1uC114
10KR100
2V85_VSIM
C115 0.1u
A4
B4
VEXT2
T3
VMEM1
VMEM2
T2
R3
VMEMSEL
VMIC
N16
T7
VRTC
VSIM
T6
E15
VUSB
VVCXO
D16
VAPPGATE
T4
VBACK
VBACKSEL
T5
B8
VBATSENSE
A5
VCHG
VCORE1
P1
N1
VCORE2
VEXT1
H16
VABB
VAPP
F16
E16
NC_G16_VPLL_TE
G16
R12
NC_R12
R1
A6
GATEDRIVE
IBIAS
T15
ISENSE
A7
B7
CHGDACREF
B5
CHGOSC
CRST
AIN1N
R16
AIN1P
P16
R15
AIN2N
P15
AIN2P
R13
AIN3L
AIN3R
R14
VUSB
C3
COM1
A3
COM2
B1
GND
C2
IN1
A2
IN2
C1
NC1
A1
NC2
C4
NO1
A4
NO2
B4
V+
2V5_VMIC
U100
MAX4684EBC_T
2V8_VMEM
1u
C130
2.2uC117
1V8_VCORE
VCHARGE
2V75_VABB
VBAT
MULTI_MIC_P
MULTI_MIC_N
MIC_PATH_SEL
MIC_P
MIC_N
BACK_BATT
AUXIN
AUXIP
CLOSE TO MIC
R117
2.2K
R103
1K
0.1u
2V5_VMIC
OSF213-42D
MIC100
1
2
C106
C103C102
22u39p
C104
39p
2.2K
R104
C105
39p
39p
C118C117
39p
100
100
R116
R105
VA100
EVLC14S02050 EVLC14S02050
VA101
MIC_P
MIC_N
Figure 4-14