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SGH-X450 Flow Chart of Troubleshooting
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7-15
VC
1
11
9
VC2
VC3
5
EGSM_RX_1
EGSM_RX_2
2
10
EGSM_T
X
G
7
G
12
G
14
G
15
16
G
PCS_RX
6
U201
LMG003W-5076A
13
ANT
3
DCS_RX_
1
DCS_RX_
2
4
DCS/PCS_TX
8
1
C209
100N
F
0
0
R20
4
R20
3
220NF
C21
3
C210
15PF
C223
5PF
C204
0
5.6p
F
C222
L216
3.9nH
6.2nH
L202
C217
1P
F
47PF
1P
F
C220
C21
2
10UF
6.3V
C215
OU
T
L211
NC
F200
FAR-F6EB-1G9600-B2BW
2
G
5
G
1
IN
3
OUT
4
C221
1P
F
ANT20
0
C218
0.75P
F
6.3V
100U
F
C20
7
NC
C208
1PF
C216
0.75P
F
L203
8.2NH
C219
NC
R202
R20
0
0
0
R20
1
C20
6
C214
33PF
J_ANT
220NF
+VBATT
C20
5
10nH
VSEN
220N
F
C211
6
PACENA
2
RSVD
15
22
VAPC
VBATT
20
3
VCC1
VCC1
81
VCC_CMOS
19
10
11
GND
13
GND
14
GND
16
GND
GND
18
GND
21
GSM850/900OUT
12
GSM850/900I
N
DCS/PCSIN
DCS/PCSOUT
17
7
GND
23
GND
24
GND
GND
25
26
GND
9
GND
GND
U200
SKY77324
BS
4
5
L21
5
NC
G
56
G
L213
NC
KMS-50
3
CON201
A
3
2
C
1
G
4
G
NC
L214
GSM_TX_EN
DCS_TX_EN
PCS_RX_EN
L204
27NH
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_N
DCS_LNA_IN_P
PCS_LNA_IN_N
PCS_LNA_IN_P
TX_BAND_SE
L
TX_EN
TXPOWER
DPCS_PAM_IN
GSM_PAM_IN