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SGH-P408 Flow Chart of Troubleshooting
3-
20
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TRANSMITTER & RECEIVER
0.75PF
C100
2
8.2nH
L1002
C1006
0.75PF
1.8N
H
L100
3
9
PCSOUT
11
TXEN
3
VBATT
4
VCC
10
8
VCC2
VCC2
12
VRAM
P
6
5
VREG
U1001
BAND
21
DCSI
N
GND
13
GSMI
N
7
GSMOUT
0.75PF
C1005
4
6
OUT
2
300
R1006
F1003
1
G1 G2
35
G3
IN
2
OUT
1
VPA
C
0.75PF
C1010
C1015
L1006
7.5NH
PCSRX 6
33PF
DCS/PCSTX
EGSMRX 1
2
EGSMRX
EGSMTX
12
7
GG
14
U1005
15
ANT
DCSRX 3
4
DCSRX
10
33nH
L1001
C100
7
47PF
4
3
IN
1
OU T
C100
8
1P F
CN1001
2
GND
GND
VBA
T
C1003
0.75PF
3.3nH
L100
7
6.3V
100U
F
C1013
L1000
4.7n H
18nH
L1008
R1007
30 0
18
R1004
47PF
C1000
33PF
C1012
100K,1%
R100
8
30 0
R1003
R1000
18
R1002
300
180
R100
5
180
R100
1
10PF
C101
7
0.75PF
C1004
0.75PF
1
1
2
2
3
3
C1009
ANT1
33PF
1N F
C1014
DCS_TX_EN
PCS_RX_EN
C1016
GSM_LNA_IN_P
GSM_LNA_IN_N
DCS_LNA_IN_N
DCS_LNA_IN_P
PCS_LNA_IN_N
PCS_LNA_IN_P
GSM_TX_EN
GSM_PAM_IN
DPCS_PAM_IN
TX_BAND_SEL
TX_EN
TXPOWER