Samsung SGH-I750 Service Manual page 50

Flow Chart of Troubleshooting
MIC501
C531 C532
C535
VMICBIAS
R537
R538
C582
EAR_MIC+
BT_SPKOUT+
C578
C583
EAR_MIC-
C584 R535
R536
C537 C538
C536
ZD506 ZD504
VAUDIO33
20 19 18 17 16 15 14 13
21
NC
12
22 NC
X1
1 Y 11
MICP U503
X
2 Y3 10
X0
3 9
Y1
X3
4 _ENABLE
5 6 7 8
MIC_SEL1
MIC_SEL2
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MIC+
MIC-
VMICBIAS
R532
C508
R516
BT_SPKOUT-
MICN
R533
R534
7-16
MIC+
TA505
MIC-
RCV_EARCOM