Samsung SGH-C250 Service Manual page 17

26M_OUT
AFC
C306
VBAT
C313
C362
DPCS_PAM_IN
R304 15
GSM_PAM_IN
L313
R309
C346
L309
26M_OUT
R311
C351
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VRF_2.9V
C301
C300
R301 10K
C307
VCCD_2.9V
VLDO2
C314 VLDO1
VBAT
VDD
VCC_TXVCO
C318
TXOP_HI
C321
TXOP_LO
VLDO3
C324 C325 C326 C323
SERLE
SERCLK
SERDAT
RTXIN
RTXIP
C347
C348
8
VCC
1
_PR
2
_CLR
3
Q
GND
4
3-3
Flow Chart of Troubleshooting
OSC300
1 2
HOT GND1
GND2 HOT
4 3
RTXQN
RTXQP
C308
RX1900B
RX1900
RX1800B
DCS_LNA_IN_P
RX1800
DCS_LNA_IN_N
U300
RX900B
GSM_LNA_IN_P
RX900
GSM_LNA_IN_N
RX850B
RX850
GND
R306
7
CK
6
D
R307
5
_Q
C352
U303
C341
CLK13M_TR
C344
CLK13M_MC
CLK13M_YMU