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Flow Chart of Troubleshooting
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7-31
R139
8.2K
C161
C149
R124
R119
R115
R130
R123
R122
R125
R113
R120
C167
VBATT
2
VCC1A
6
VCC1B
16
14
GND
GND
13 12
GND
4
GSMIN
GSMOUT
11
RSVD
19
20 VAPC
17
DCS/PCSOUT
18 ENABLE
GND
5
GND
21
7
GND
GND 8
9
GND
10
GND
GND
U105
BS
1
DCS/PCSIN
3
15
R129
R121
C168
C176
1.2PF
OUT2
1
2
SW1
4
SW2
VB1
8
12
VB2
VC
10
3
G
6
G
G
71
1
G
G
9
14
G
G
13
5
OUT1
U104
TXVCO
R107
C129
C123
11
TX2
25
VDD
NC
17
18
NC
5
RX1
RX2
2
RX3
34
RX4
TRX
20
13
TX1
NC
29
NC
31
8
NC
NC
91
0
NC
14
NC
15
NC
NC7
16
12
GND
19
GND
GND
21
GND
23
24
GND
30 GND
32 GND
NC
7
U101
22
ANT
26
CTL-A
CTL-B
27
28
CTL-C
1
GND
GND
6
C116
C118
R103
R102
R108
VREG_RFRX_2.8V
UMTS_ANT
GSM_ANT_SEL2_N
GSM_ANT_SEL1_N
GSM_ANT_SEL0_N