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SGH-E880 Flow Chart of Troubleshooting
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PAM
FEM(Front-End Module)
GSM1900RX
GSM900RX
1
GSM900RX
2
10
GSM900TX
11
VC1
9
VC2
VC3
12
ANT
13
G
7 14
G
3
GSM1800RX
GSM1800RX
4
GSM1800/1900TX
8
5
GSM1900RX
6
C725
F700
5
07
L
PCS_RX_EN
DCS_TX_EN
GSM_TX_EN
C716
R706
R707
R708
C715
C718
C736
R712
R705
C717
C720
C719
C735
C712
VBAT
C714
R710
C713
L701
11
GSMOUT
D
V
S
R
91
02
C
P
A
V
71
T
T
A
B
V
VCC1A
2
VCC1B
6
8
D
N
G
9
D
N
G
D
N
G
01
GND
61
GND
31
41
GND
2
1
GND
GSMIN
4
U701
1
BS
DCS/PCSIN
3
51
DCS/PCSOUT
EL
B
A
N
E
81
GND
5
12
D
N
G
D
N
G
7
R709
TX_BAND_SEL
PAC_EN
VAPC
GSM_PAM_IN
DPCS_PAM_IN