Samsung SGH-D520 Service Manual page 45

Flow Chart of Troubleshooting
EAR_MIC_P
EAR_MIC_N
IF_EAR_R
IF_EAR_L
EAR_SWITCH
JACK_IN
SDS_TXD
SDS_RXD
JIG_ON_IF
USB_D+
USB_D-
TA_VEXT
ICHRG
C136 TA100
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VCCD_1.8V
R500
1
2 IN
3
4 ISET
C124
R104
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R501
R502
R503
VR514 R526
C542
VBAT
U102
VL _CHG 8
BATT 7
GND _ACOK 6
_EN 5
G G G G
9 10 11 12
R105
9-12
VBAT USB_5V TA_VEXT
IFC503
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17 17
18
18
19 19
20
20
21 NC 25
NC
22
NC
NC
TA501 23
NC NC
24 NC NC 28
C543
ZD504
CHG_OFF
26
27