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Flow Chart of Troubleshooting
C223
C301
C303
R305
C202
C205
R206
R204
C208
C224
C222
L202
C307
C304
C300
R300
C213
C212
C214
C216
R201
C215
MOD_STANDB Y
PON_PA
BAND_SEL
RX_SEL
-
-
L
-
STAND BY
H
L
L
EGSM_RX
H
H
L
H
H
DCS_RX
H
H
L
-
EGSM_TX
H
H
H
-
DCS_TX
TX Module S/W Control Circuit
VBAT
C109
C107
C108
C110
MOD_STANDBY
R107
RAMP
PON_PA
L106
R108
EGSM_TX
C112
R109
C113
DCS_TX
L107
C115
DCSRX
C118
EGSMRX
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SC106
L20 0
L201
C20 0
C201
R203
R100
R107
R104
R205
R103
C119
C117
C118
C116
C114
C115
SC103
RFS100
C
A
G
G
1
2
3 4
L100
ANT100
ANT101
D100
L101
L102
L103
C105
L104
C106
L105
2
5
BS1
VLOGIC
BAND_SEL
3
BS2
6
VRAMP
RX_SEL
4
TX_EN
RX1 12
PAM100
EGSMRX
27
RX2
13
GSM_IN
DCSRX
29
DCS|PCS_IN
11
NC
NC 14
DCSRX_P
C114
F100
5.6nH
9
OUT1
1 IN1
OUT1 8
DCSRX_N
C116
7
OUT2
EGSMRX_P
4
C117
IN2
OUT2 6
22nH
EGSMRX_N
C119
RF Part
9-23
R109
R108
L107
L106
C113
C112
L101
D100
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