Samsung GT-S3370 Service Manual page 35

HSED_BIAS_1.8V
R501
C500
MIC1_MSM_P_IN
MIC1_SPK_N
2 1
1B1 VCC
MIC1_MSM_N_IN
3 10
MIC1_MSM_N_IN 1A 2B1 MIC1_SPK_P
U500
4 9
S1 2A MIC1_MSM_P_IN
5 8
MIC_SEL
MIC1_RCV_N
1B0 S2
GND 2B0
6 7
MIC1_RCV_P
MIC SEL HIGH: SPK
MIC SEL LOW : RCV
HSED_BIAS_1.8V
MIC_500
1
POWER POWER
2 GND
GND1
3 GND
GND2 L502
4 OUT
OUT
C512
ZD509
MAIN MIC PATH
Close to QSC
C502
MIC1_MSM_P
C507
MIC1_MSM_N
MIC1_RCV_N
MIC1_RCV_P
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C500 R501
ZD507
C512
C502
9-7
Flow Chart of Troubleshooting
R502 C503
L504
ZD501 ZD500
TA500
R500