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Flow Chart of Troubleshooting
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9-23
H
H
BAND_SEL
L
H
L
MOD_STANDBY
DCS_RX
RX_SEL
-
STAND BY
L
-
H
L
EGSM_TX
H
-
H
-
H
-
H
PAM
H
TX Module S/W Control Circuit
H
DCS_TX
PON_PA
L
EGSM_RX
ANT100
C106
L105
L103
L100
C108
C101
ANT101
C103
R103
C100
2
G
3 5
G G
10
1
IN1
IN2
4
8
OUT1
OUT2
6
F100
9
BAL1
7
BAL2
G
C107
C102
TA100
R102
RX1 12
13
RX2
TX_EN
4
3
0
V
B
A
T
T
VLOGIC
2
3
VRAMP
G
G
1
0
1
5
G
G
1
6
G
1
8
1
9
G
27
GSM_IN
11
NC
NC 14
G
G
3
2
7
G
3
3
G
G
3
4
3
5
G
G
3
6
G
8
9
2
1
G
G
2
2
2
3
G
G
2
4
2
5
G
G
2
6
G
2
8
3
1
1
7
A
N
T
5
BS1
6
BS2
DCS|PCS_IN
29
1
G
G
2
0
PAM100
C104
R104
3 4
G
RFS100
2
A
C
1
G
L101
C105
R112
L102
VBAT
EGSMRX_P
EGSMRX_N
DCSRX_P
DCSRX_N
MOD_STANDBY
RAMP
PON_PA
DCS_TX
EGSM_TX
BAND_SEL
RX_SEL