Samsung SGH-C250 Service Manual page 37

ANT101 ANT102
1 1
1 1
2 2 2
2
3 3
3 3
ANT
4 4
4 4
R300
L302
DPCS_PAM_IN
GSM_PAM_IN
DCS_LNA_IN_N
DCS_LNA_IN_P
GSM_LNA_IN_N
GSM_LNA_IN_P
BAND_SEL1
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RFS300
G A C G
1 2 3 4
R317
L301
C304
L303
F300
C310
C311
3
OUT
4 1
OUT IN
L304
C312
G G
5 2
F301
C319
3 OUT
4 1
OUT
IN
L306
C322
G G
5 2
TX_EN
3-23
Flow Chart of Troubleshooting
C302
L300
C305
12
ANT
7
VBATT
1
DCSIN
11 10
GSM900_IN VCC1
3
VCC2
C317 20
RX1
2
V1
16
RX2 PAM300
8
VRAMP
4
VBS
9
VMOD_EN
6
VTX
14
NC
18
NC
C329 C330
GND GND GND GND GND GND
5 13 15 17 19 21
VBAT
C309
L305
C315 TA316
C320
R303
VAPC
VMOD_EN
C327 C328