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Flow Chart of Troubleshooting
7-33
2.
8V
L
F
ESW
2
Rx
(DCS
1800)
L
L
typ
ical
3.
8V
G
S
M900 RX
L(
H)
RX
(G
S
M
900)
F
ESW
3
DCS
Rx
L
L
T
x
(DCS
1800/
1900)
L
H
H
L
2.
8V
T
x
(G
S
M
900)
L
PC
S R
x
H
L
F
ESW
1
L
L
G
Rx
(P
CS
1900)
2.
8V
2.
8V
R
113
L
136
R
109
+V
C
C
_
S
Y
N
C1
1
6
R
127
R1
0
3
1
1
2
2
3
3
4
4
C
139
ANT
CO
N-
T
8
0
9
ANT
1
0
2
R
130
+
V
CC_
S
Y
N
C
138
R
132
C
112
L
138
L
103
C
136
R
114
T
A
100
C1
1
4
L
139
C
135
C1
2
8
C
146
R
116
C
160
R1
1
1
L1
4
0
C
152
R
128
C
148
C
3
G
1
G
4
C1
2
0
C
155
R
F
S
100
K
M
S
-512
2
A
L
137
C
147
C
105
8
VB
IA
S
VC
C
12
V
RAM
P
7
15
GND
GND
16
17
GND
G
S
M
850/
900I
N
9
10
G
S
M
850/
900O
U
T
MO
D
E
6
TX
_
E
N
4
V
BAT
T
5
T
Q
M
7
M
5004
BAND
3
DCS
/P
CS
IN
1
14
DCS
/P
CS
O
U
T
GND
21
1
GND
13
GND
P
A
M
100
C
102
C
145
11
31
VC
C
R
F
28
VCCRFLO
23
VCCSYN
16
V
DDL
C
104
PG
M
D
IV
10
QA
9
QB
21
REFIN
19
RE
F
V
CC
RFTUNE
25
SW
B
IA
32
SW
B
IB
33
SW
O
N
40
TX
V
C
C
39
VCCCP
26
VC
C
IF
35
HBIA
HBIB
36
2
HBO
IA
8
IB
7
29
LBIA
LBIB
30
LB
O
38
NC1
45 46
NC2
17
FESW3
GND1
41
42
G
ND2
G
ND3
43 44
G
ND4
G
NDL
15
GNDREF
22
G
NDRF
1
34
GNDRF3
1
3
GNDRF4
G
N
FR
F2
37
13
CL
K
CL
KF
DBX
20
CL
KO
UT
18
CTRL
24
DAT
A
12
14
EN
EXTRES
27
4
FESW1
FESW2
5
6
U102
C
106
C
124
C
142
6
C
110
2
GN
D
5
IN
OU
T
1
1
3
OU
T
2
4
VC
O
N
T
VD
D
V
R
100
U
104
V
R
102
R
136
C
144
C
158
C
149
C
156
C
118
V
R
101
L
106
2
GN
D
5
IN
1
OU
T
1
3
OU
T
2
4
VC
O
N
T
VD
D
6
U
105
C
163
C
134
C
123
C
107
+
V
CC_
S
Y
N
C
122
C
109
F
103
2
1
3
2
2
3
3
4
4
C
159
ANT
1
0
1
ANT
CO
N-
T
8
0
9
1
1
R
135
R
129
L
118
R
137
3
PC
SR
X2
VC
1
12
9V
C
2
13
V
C
3
8
ANT
1
DCS
RX
14
DCS
RX
DCS
|P
CS
T
X
10
EG
SM
R
X
4
EG
SM
R
X
5
G
15
PC
SR
X1
2
F
101
850G
S
M
R
X
7
6
850G
S
M
R
X
850G
S
M
|E
G
S
M
T
X
11
L
117
C
127
L
135
C
121
C
154
C
157
C
126
R
112
R1
1
7
C
161
L
101
R
624
R
115
R
105
T
C
X
100
2
GN
D
3
OU
T
VC
C
4
VCON
1
VCTL1
7
15
VCTL2
L
141
4
6
NC
PA1
81
3
PA2
5
PB1
PB2
16
PC
1
10
3
PC
2
14
VCTL1
U100
GN
D
91
1
GN
D
GN
D
12
1
GN
D
2
GN
D
GN
D
C
162
L
121
2
G1
4
G2
6
G3
G4
8
IN1
1
3
IN2
7
OU
T
1
5
OU
T
2
C
131
F
102
C
141
C
103
C
153
L
133
G
S
M
850
G
S
M
900R
X
T
X
+
V
DD_
RX
_
T
X
GS
M
_
T
X
G
S
M
900R
X
T
X
+V
D
D
_
R
X
_
TX
AF
C
BT
_
ANT
J
_
ANT
F
ESW
1
F
ESW
2
F
ESW
3
+V
D
D
_
IO_
LOW
+
V
DD_
RX
_
T
X
V
BAT
DCS
_
T
X
DCS
PO
N
_
PA
RAM
P
M
O
D
E
_
SEL
EC
T
PO
N
_
SW
RF
_
DAT
A
RF
_
C
L
K
RF
_
E
N
D_
RE
F
_
CL
K
P
O
N
_
3587_S
Y
N
T
H
GS
M
_
T
X
+
V
C
C
_
SYN
DCS
_
T
X
F
ESW
3
F
ESW
2
F
ESW
1
RX
_
T
X
_
IP
RX
_
T
X
_
IN
RX
_
T
X
_
Q
P
RX
_
T
X
_
Q
N
+
V
DD_
RX
_
T
X