Samsung SGH-D520 Service Manual page 36

C600 R600
CLK13M_TR
C601
CLK13M_MC
CLK13M_YMU
VBAT
VLDO7_1.8V
R108
TA103
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RF_EN
C602
R601
RTXIP
C603
RTXIN
R602
RTXQP
RTXQN
SERDAT
SERLE
SERCLK
XOENA
VCCD_1.8V
U105
L100
1 VIN 5
SW
2
GND
3 4
EN FB
C132
VCCD_2.9V VRF_2.9V
9 10 11 12 13 14 15 16
XOUT
8
RFIPP
7 BIP
RFIPN
BIN
6
RFIDP
U600
5 BQP
RFIDN
4 BQN
RFIEP
3 SDIO
RFIEN
2 _SEN
RFIAP
1 SCLK
RFIAN
35 34 33 32 31 30 29 28 27 26
C606 C607
3 4
2
1
OSC600
U106
L101
1 VIN SW 5
2
GND
3 EN 4
FB
C131
9-3
Flow Chart of Troubleshooting
C604
GSM_PAM_IN
DPCS_PAM_IN
C605
PCS_LNA_IN_P
17
PCS_LNA_IN_N
18
DCS_LNA_IN_P
19
DCS_LNA_IN_N
20
GSM_LNA_IN_P
21
GSM_LNA_IN_N
22
23
24
25
R603
AFC
C609
C608
HP_CORE_1.57V
VLDO1_1.5V
D100
C130