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Flow Chart of Troubleshooting
9-51
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R106
R107
L104
T
T
A
B
V
4
D
N
G
5
6
P
M
A
R
V
GSM_IN
7
GSM_OUT
8
DCS|PCS_OUT
9
D
N
G
5
2
D
N
G
6
2
7
2
D
N
G
D
N
G
8
2
D
N
G
9
2
N
E_
X
T
3
D
N
G
0
3
D
N
G
1
3
D
N
G
8
1
D
N
G
9
1
2
L
E
S_
D
N
A
B
D
N
G
0
2
D
N
G
1
2
D
N
G
2
2
D
N
G
3
2
D
N
G
4
2
D
N
G
0
1
D
N
G
1
1
2
1
D
N
G
D
N
G
3
1
D
N
G
4
1
D
N
G
5
1
D
N
G
6
1
D
N
G
7
1
PAM100
DCS|PCS_IN
1
L111
C102
C100
R108
VREG_FEM_2.7V
R105
TP_GSM_PA_PWR_CTL
TP_GSM_ANT_SEL1_N
C123
C110
L110
C109
TP_GSM_ANT_SEL3_N
1
2
2
3
3
ANT101
1
L105
R104
L103
C114
L101
L102
L106
L107
TP_GSM_ANT_SEL2_N
C101
C121
TP_GSM_PA_EN
L109
UMTS_TRX2
18
UMTS_TRX3
VC1
15
VC2
14
13 VC3
VC4
12
VDD
11
GSM1900_RX1
GSM1900_RX2
8
1
GSM850_RX1
2
GSM850_RX2
GSM850|900_TX
24
3
GSM900_RX1
GSM900_RX2
4
UMTS_TRX1 16
17
23 25
G
26
G
27
G G
28
5
GSM1800_RX1
6
GSM1800_RX2
22 GSM1800|1900_TX
7
F100
ANT
20
10
G
G
9
G
19 21
G G
RFS100
2
A
C
3
1
G
G
4
C134
TA100
R103
TP_GSM_ANT_SEL0_N
L108
L113
V_BAT
C108
TP_GSM_PA_BAND
C131
L112
1
1
2 2
3
3
ANT102
L100
GSM_ANT_SEL0_N
GSM_ANT_SEL1_N
GSM_ANT_SEL2_N
GSM_ANT_SEL3_N
GSM850_RXM
GSM850_RXP
DCS_RXP
DCS_RXM
PCS_RXP
PCS_RXM
DCS_PCS_TX
GSM_TX
UMTS_1900_TRX
GSM_PA_EN
GSM_PA_BAND
GSM_PA_PWR_CTL
GSM900_RXM
GSM900_RXP
UMTS_900_TRX
UMTS_2100_TRX
L124
V_BAT
L132
C148
R115
C139
C187
C176
C181
C180
G G
5
1
IN
OUT 4
F104
G
2 3
L125
C117
C194
COUP
1 IN
2
OUT
CPL102
50OHM
3
4
R114
L127
L123
L137
4 VBATT
12
VCC
VCCA 11
1 VEN_900
VEN_IMT
7
VMODE1
3
VMODE2
5
14
GND
10
GND
9
GND
GND
15
RFIN_900
2
6
RFIN_IMT
RFOUT_900
13
RFOUT_IMT 8
PAM101
C199
L133
L131
C196
L128
C197
4
G
G
6
G
8
G
9
5
RX
7 TX
DUF102
2
ANT
1
G
3
G
CPL101
3
50OHM
COUP
4
IN
1
2
OUT
RX 1
RX 8
3 TX
DUF101
ANT
6
2
G G
4 5
G
7
G
G
9
C119
C142
C152
L140
C183
C106
V_BAT
C179
L129
R112
TA102
C107
L138
C118
R118
F103
G
2
G
3 5
G
1
IN
4
OUT
C195
PWR_DET
UMTS_RX_2100
PWR_DET_1900
PWR_DET_900
UMTS_RX_900_P
UMTS_RX_900_M
UMTS_900_TRX
UMTS_TX_2100
UMTS_2100_TRX
PA_ON_W900
PA_ON_W2100
PA_R0
UMTS_TX_900
④
③
①
②