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Flow Chart of Troubleshooting
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10-35
NC
12
RX1
RX2 13
4
TX_EN
T
T
A
B
V
0
3
2
VLOGIC
VRAMP
3
0
1
G
G
5
1
6
1
G
8
1
G
G
9
1
GSM_IN
27
NC 11
14
2
3
G
G
7
G
3
3
4
3
G
G
5
3
6
3
G
8
G
G
9
G
G
1
2
2
2
G
G
3
2
4
2
G
G
5
2
6
2
G
8
2
G
G
1
3
PAM100
T
N
A
7
1
BS1 5
BS2 6
29
DCS|PCS_IN
G
1
0
2
DCS RX
GSM850 RX
GSM900 RX
PCS RX
C124
L110
XEN
2
3
XMODE
5
2
8
T
U
O
X
1
3
XTAL1
0
3
XTAL2
_PDN
0
1
9
_RESET
N
E
S
_
2
K
L
C
S
1
OI
D
S
3
VDD
2
1
VDD
3
1
VDD
8
2
VDD
9
2
1
1
VIO
6
2
XDIV
N
DI
F
R
0
2
P
DI
F
R
9
1
N
EI
F
R
2
2
P
EI
F
R
1
2
N
PI
F
R
8
1
P
PI
F
R
7
1
RFOH
6
1
5
1
RFOL
P
Q
B
5
4
1
GND
GND
3
3
4
3
NC
NC
5
3
6
3
C
N
N
AI
F
R
4
2
P
AI
F
R
3
2
U101
7
2
AFC
6
NI
B
PI
B
7
N
Q
B
4
L107
L108
R101
R102
C122
C126
C125
C127
L112
VDD_RX_TX_2.8V
C123
L113
L109
0
1
G
GSM850_OUT 6
7
GSM850_OUT
8
GSM900_OUT
GSM900_OUT 9
1 IN
VCC_SYN_2.8V
F102
2
G
G
3
4
G
G
5
BAL1
BAL2 8
9
BAL2
2
G
G
3
4
G
G
5
0
1
G
UNBAL
1
F101
BAL1 6
7
2
D
N
G
4
1
T
O
H
3
T
O
H
L106
OSC100
2
1
D
N
G
C121
L111
C120
R103
HIGH_RX
LOW_RX
RF_RESET
DCS_TX
REF_ON_PMU
PON_3587_SYNTH
EGSM_TX
RF_RESET
RX_TX_IP
RX_TX_IN
RX_TX_QP
RX_TX_QN
RF_DATA
RF_CLK
RF_EN
VDD_IO_LOW_1.8V
D_REF_CLK
BT_CLK