Samsung SGH-S720i Service Manual page 20

GSM_PAM_IN
DPCS_PAM_IN
RF_EN
PCS_LNA_IN_P
C113
PCS_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
GSM_LNA_IN_P
GSM_LNA_IN_N
AFC
R104
C133
CLK13M_OUT
VCCB_2.9V
C100
18 17
_PDN
19
RFIPP
20
RFIPN
21
RFIDP
22
RFIDN
23
RFIEP
24
RFIEN
25
RFIAP
26
RFIAN
27
GND
28
VRF_2.9V
C129
C130
U100
1
NC VCC
2 A
NC
3
GND
R107
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Flow Chart of Troubleshooting and Circuit Diagrams
VRF_2.9V
C108
16
15 14 13 12 11
VIO
10
_RES
9
XOUT
8
BIP
7
RFT100
BIN
6
BQP
5
BQN
4
SCLK
3
SDIO 2
_SEN
1
OSC100
4
1
VCCB_2.9V
C131
VRF_2.9V
6
5
R105
Y 4
C139
R108
3-3
U510
C103
VCCD_2.9V
C109
C153
C112
RTX_I_P
RTX_I_N
RTX_Q_P
RTX_Q_N
C122 C123 C124
R103
C128
25V
3
2
C135
CLK13M_HPE
C138
CLK13M_CSP
CLK13M_YMU765
C141
CLK13M_YMU800
VPC
VAPC
CLK13M_OUT
SBCK
SBDT
SBST
XOENA