Samsung GT-S5200 Service Manual page 65

ANT100 ANT101
R100
C105
1005
C112
C109
VC1
VC2
DPCS_TX
GSM_TX
C107
1005
L104
C108
1005
1005
C110
1005
C113 L106
1005
C117
1005
L107
C118
1005
C119
1005
C120 L108
1005
1005
21
22
23
24
25
26
RX_TX_QN
27
RX_TX_QP
28
RX_TX_IN
29
RX_TX_IP
30
REF_ON_PMU
REF_CLK
1005
C130
BT_CLK
OSC100
4
1
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RFS100
L101
C106
F100
11
ANT
1
GSM850-RX1
14 2
VC1 GSM850-RX2
3
EGSM-RX1
10 4
VC2 EGSM-RX2
5
DCS-RX1
6
DCS-RX2
7
PCS-RX1
8
PCS-RX2
15
DCS|PCS-TX
17
EGSM|GSM850-TX
G G G G G G G
9
12 13 16 18 19 20
L105
1005
C139 C140
C114
VDD_RX_TX_2V8
C123
NC US|EGSM_TX
10
TEST_A PA_VCTRL
9
TEST_B TX_VCTRL
8
NC U100 VDD_RF
7
NC VDD_LO
6
VDD_BB VCO_SYN_REG
5
Q- VDD_SYN
4
Q+ VDD_IO
TP_RF_DATA
3
I- DATA
TP_RF_CLK
2
I+ CLK
1
C129
TP_RF_EN
RF_EN
VDD_SYN_2V8
C133
3
C132
2
9-37
Flow Chart of Troubleshooting
C107
1005
L104
C108
1005
1005
C110
1005
C113 L106
1005
C117
1005
L107
C118
1005
C119
1005
C120 L108
1005
1005
DPCS_IN
GSM_IN
VDD_RX_TX_2V8
C122
R103
RAMP_OUT
TP_RAMP
RAMP
C124
VDD_IO_LOW_1V8
RF_DATA
RF_CLK
C137
VDD_IO_HIGH_2V9
C138