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Flow Chart of Troubleshooting
7-
34
Transmitter & Receiver
L
L
L
D
C
S/PC
S T
x
H
_E
C
O
S
L
VC
1
L
VC
3
L
L
L
L
H
L
L
DCS
Rx
GS
M
850/
900 T
x
L
PC
S R
x
H
GS
M
Rx
VC
2
C101
C108
R105
C115
C158
R
112
L102
L103
C112
1
OUT
1
OUT
2
5
11
VCC1
7
VCC2
C157
GND
2
4
BAND
9
CONT
ROL
3
BAND
GND
6
GND
8
10
GND
GND
12
L108
O
S
C
100
R
120
C134
C138
R123
C120
C119
R117
C122
C
127
C156
C152
ANT
2
C144
L110
C110
L118
R114
F100
B7851
2
GG
5
IN
1
3
OUT
OUT
4
C129
R133
C125
1NF
50V
C143
C103
R102
C137
L115
C111
C109
R132
L105
R101
L119
R136
R134
C147
R118
R106
R109
C121
C136
C117
C105
C130
0
R108
R128
B7845
2
GG
5
1
IN
OUT
3
4
OUT
F101
C104
R
121
R129
22K,1%
C154
R116
R
115
R135
L101
L113
L109
GND
OUT
3
4
VCC
1
VCON
R122
OSC101
2
C135
R110
R125
C124
1UF
10V
R113
4
OUT
C145
B7852
F102
2
GG
5
1
IN
3
OUT
C155
L111
L107
C1
6
C2
3
E1
1
E2
4
ANT
1
L104
Q100
PEMD10
B1
2
B2
5
C114
L116
C
131
C106
1.8NF
C116
C153
50V
R126
L112
R
111
C
126
C132
R127
C139
C141
1
TXRFI
R
107
37
RFGND2
RFLOVCC
28
RFTUNE
26
RFVCC
31
25
RFVCOVCC
RXON
23
24
SYNON
22
SYNVCC
TXCPO
3
TXCPVCC
45
TXON
46
35
PCSIA
36
PCSIB
8
QA
QB
9
REFGND
14
15
REFIN
REFVCC
16
RFCPO
21
20
RFCPVCC
34
RFGND1
GND2
42
43
GND3
GND4
44
27
GNDTUNE
32
GSMI
A
33
GSMI
B
6
IA
7
IB
IFVCC
10
45
NC1
NC2
CLKFDBX
11
CLKOUT
DATA
17
38
DCSIA
39
DCSIB
EN
19
EXTRES
2
FESW1
29
30
FESW2
40
FESWON
41
GND1
U101
12
CAFCSUP
18
CLK
13
R124
VCC3DCS/PCS
21
18
VCC3GSM
VCCOUT
19
VCCOUT
20
VRAMP
45
NC15
TXENABLE
41
VBATT
42
43
VBATT
VCC1
39
VCC1GSM
46
VC
C
2
D
C
S/
PC
S
35
VC
C
2
GSM
2
NC
38
NC
44
NC
9
NC
10
NC
11
NC
12
NC13
NC14
NC
25
NC
26
NC
27
28
NC
NC
29
NC
8
NC
33
NC
36
GSM
850/
900OU
T
6
G
S
MI
NTE
RG
ND
1
NC
3
NC16
NC17
NC22
NC23
NC24
7
GN
D
GN
D
30
GN
D
32
34
GN
D
49
GND
50
GND
GND
51
GSM850/900IN
48
DCS/PCSIN
37
DCS
/P
CS
O
U
T
31
GN
D
4
GND
52
GND
53
GND
54
GND1GSM
47
GN
D
5
U
102
BANDSEL
40
C133
L106
C140
C123
K
M
S
-512
2
A
C
3
G
1
G
4
C102
CON1
0
1
R104
C146
100K
C142
R119
C107
C113
C118
R130
L117
C128
G5
13
14
G6
GSM_RX
5
GSM_TX
11
3
PCS_RX
4
VC1
VC2
8
2
VC3
U100
ANT
7
1
DCS_RX
DCS|PCS_T
9
6
G2
G3
10
G4
12
R131
VCC_CP_4V
L114
VCC_RX_TX_2V7
FE_SW1
FE_SW2
ANT
FE_SW1
FE_SW2
VCC_SYN_2V7
PON_TX
IRX_TX_P
IRX_TX_N
QRX_TX_P
QRX_TX_N
MEL_13M
VBAT
PCS_RX
ANT_SW2
ANT_SW1
PCS_RX
ANT
_
S
W
3
PAM
_
TX_
E
N
RAM
P
TXVCO_SW1
TXVCO_SW2
VCC_TX_BURST_2V7
AFC
D_REF_13M
RF_BBI_CLK
RF_BBI_DATA
RF_EN_SYNT
VCC_CP_4V
VCC_RF_VCO_2V7
VCC_RX_TX_2V7
PON_RX
PON_SYNT
VCC_SYN_2V7