Samsung SGH-P520 Service Manual page 66

GSM_PAM_IN
DPCS_PAM_IN
RF_EN
PCS_LNA_IN_P
PCS_LNA_IN_N
DCS_LNA_IN_P
DCS_LNA_IN_N
GSM_LNA_IN_P
GSM_LNA_IN_N
C130
AFC
R104
C134
VRF_2.9V_REG
C100
VRF_2.9V
16
18 17 15 14 13 12
_PDN
19
RFIPP
20
RFIPN
21
RFIDP
22
U101
RFIDN
23
RFIEP
24
RFIEN
25
RFIAP
26
RFIAN
27
GND
28
VRF_2.9V VRF_2.9V_REG
C132 C133
C135
R100
C101
VCCD_2.9V
C106 C107
11
C112
VIO
10
_RES
9
XOUT
8
BIP
7
BIN RTX_I_N
6
BQP
5
BQN RTX_Q_N
4
SCLK
3
SDIO
2
_SEN
1
C125 C126
C131
4
3
1
2
OSC100
10-31
Flow Chart of Troubleshooting
PAM_VRAMP
VAPC
R101
C113
R102 C115
RTX_I_P
C117
RTX_Q_P
SBCK
SBDT
SBLE
C127
XOENA
CLK13M_TR
CLK13M_MC
CLK13M_YMU