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Flow Chart of Troubleshooting
9-32
L
GSM900 RX
GSM1800 RX
<RF CONNECT>
<GSM PAM>
<RF SWITCH>
H
L
H
GSM850/900 TX
H
ANT_SEL0
H
GSM850 RX
L
L
H
L
H
GSM1800/1900 TX
H
H
L
L
L
GSM1900 RX
L
L
H
L
ANT_SEL2
H
MODE
ANT_SEL1
UMTS 850 RX/TX
C129
C174
C170
1.5nH
L103
L108
L111
C132
R118
3 TX_EN
VBATT
4
VRAMP
6
19
G
17
G
7 GSM_IN
GSM_OUT 10
8
NC
13
NC
NC
18
2 BS
5 CEXT
DCS/PCS_IN
1
DCS/PCS_OUT
16
15
G
G 14
G 12
11
G
G
9
PAM100
27nH
L109
C168
1.5nH
L106
L104
*
C
3
G
1
G
4
RFS100
2
A
R117
L119
C141
L107
R116
L120
L110
R109
27nH
ANT101
R119
C128
C172
L114
R105
R108
R110
C124
C112
C166
TA100
C116
R120
C151
L102
C163
L105
C127
C171
R115
L118
C162
C160
C173
R114
C125
C119
C167
C149
C161
C130
C164
C111
R125
R124
R104
VC1
14
13
VC2
12
VC3
VC4
11
10
VDD
GSM850_RX1
7
GSM850_RX2
8
25
GSM850|900_TX
5
GSM900_RX1
GSM900_RX2
6
15
UMTS1
16
UMTS2
17
UMTS3
G7
26 27
G8G9
28
1
GSM1800_RX1
GSM1800_RX2
2
22
GSM1800/1900_TX
3
GSM1900_RX1
GSM1900_RX2
4
ANT
19
9
G1G2
18 20
G3G4
21
G5
23
G6
24
F101
G
2
3
G
G
5
1
IN
OUT
4
DUF100
L115
ANT102
C121
C150
C126
DCS1800_PCS1900_TX
GSM_PA_PWR_CTL
VBATT
GSM_PA_EN
GSM_BAND
EGSM900_TX
DCS_RXM
DCS_RXP
PCS_RXP
GSM_RXP
GSM_RXM
VRFRX1_2.65V
VRFRX2_2.65V
RTR6275_TCXO
VSYNT_2.6V
VRFRX2_2.65V
VRFRX2_2.65V
PCS_RXM
TX_AGC_ADJ
DAC_REF
VMSMP_2.6V
GSM_ANT_SEL2_N
GSM_ANT_SEL1_N
GSM_ANT_SEL0_N
UMTS_ANT
C120
C134
R111
0
01
P
T
C115
9
51
C
C114
C169
C146
C110
C145
VDDA
TCXO
VDDA
VDDA
25
N
Q
_
X
T
35
P
Q
_
X
T
45
F
E
R
_
C
A
D
55
C
N
65
L
O
R
T
N
O
C
V
75
D
N
G
85
C
N
C
N
A
D
D
V
64
T
U
O
_
1
B
H
_
A
D
74
A
D
D
V
84
A
D
D
V
94
A
D
D
V
V_TUNE1
05
NI
_
X
T
PI
_
X
T
15
DCS_INP
39
DCS_INN
VDDA
40
PWD_DET_IN
41
VDDA
42
DA_LB2_OUT
34
T
U
O
_1
B
L
_
A
D
44
T
U
O
_2
B
H
_
A
D
54
GCELL_INN
31
GCELL_INP
32
EGSM_INP
33
EGSM_INN
34
WMIX_LNP
35
WMIX_LNN
36
GPCS_INP
37
GPCS_INN
38
32 42
N
O
_
X
T|
N
O
_
F
R
52
D
N
G
62
NI
_
A
N
L
W
72
2
S
AI
B
_
R
82
A
D
D
V
29
WLNA_OUT
R_BIAS1
30
M
D
D
V
8
2
E
N
U
T
_
V
9
A
D
D
V
GND
02
A
D
D
V
12
T
S
E
T
22
D
N
G
D
N
G
GND
RX_QP
RX_QN
RX_IP
RX_IN
SSBDT
A
D
D
V
A
D
D
V
U101
C108
R113
C143
N
O_
X
T
_
N
O_
F
R
GSM_RXM
GSM_RXP
VSYNT_2.6V
VRFTX_2.65V
PWR_DET
DCS_RXM
DCS_RXP
PCS_RXM
PCS_RXP
UMTS850_TX
EGSM900_TX
Содержание SGH-A801
Страница 43: ...8 PCB Diagrams 8 1 8 1 Main PCB Diagram Top ...
Страница 44: ...PCB Diagrams 8 2 Bottom ...