Samsung GT-S3370 Service Manual page 37

BOTHHOLE105
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 MIC1_SPK_P
1A 2B1
U500
4 9
MIC1_MSM_P_IN
S1 2A
5 8
MIC_SEL
MIC1_RCV_N 1B0 S2
GND 2B0
6 7
MIC1_RCV_P
MIC SEL HIGH: SPK
MIC SEL LOW : RCV
Microphone does not work
ZD603
C521 C515
R516
U603
Close to QSC
C502
MIC1_MSM_P
C507
MIC1_MSM_N
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C500 R501
ZD507
C512 C502
HSED_BIAS_1.8V
MIC_501
R516
1
OUT
2
GND
3
GND
4
PWR
5
GND
6
GND
C513 C515
C521
ZD508
SPK MIC PATH
9-9
Flow Chart of Troubleshooting
R502 C503
L504
ZD501 ZD500
TA500
R500
MIC1_SPK_P
MIC1_SPK_N
C514