Kenwood NXR-800H Service Manual page 185

Uhf digital base-repeater
Table of Contents

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F
SCHEMATIC DIAGRAM /
FINAL UNIT (PA SECTION)
(X45-3862-70) (A/5) : C
DIRECTIONAL COUPLER
FORWARD
C85
8p
R38
150
TX H:3V
L:1.3V
RX:0V
FWD
REF
C89
OP AMP
R35
470p
IC4
R53
NJM2904E-ZB
68k
C77
1
8
150k
AoUT
V-
470p
2
7
C96
A-IN
BoUT
3
6
470p
A+IN
B-IN
R36
4
5
GND
B+IN
68k
R54
C78
150k
470p
C97
C75
470p
470p
R45
OP AMP
R50
IC5
NJM2904E-ZB
100k
C95
1
AoUT
V-
2
470p
A-IN
BoUT
3
A+IN
B-IN
R51
4
GND
B+IN
100k
C94
100p
R89
0
Note : The components marked with a dot (
G
C105
470p
C87
REFLECT
10p
R47
150
C108
470p
DC SW
Q4
2SJ506-E(S)
R56
DETECTOR
100k
D10
HSB88WS
C104
SSM3K15TE(F)
470p
ANT SW
R57
100k
C99
100k
470p
R70
0
TEMPERATURE
SENSOR
IC7
0V
S-8130AC
5
4
C113
4700p
VSS
CD1
6
3
C114
4700p
RESET
CD2
7
2
R69
10k
RT
DET
8
1
C191
1u
VoUT
VDD
C115
470p
Q8
SSM3K15TE(F)
R66
10
DC SW
C88
0
470p
PRT
1.5V
PWR
C162
0.1u
8
PRT
R39
820k
7
6
R37
680k
5
R33
680k
R40
820k
C82
0.1u
) are parts of layer 1.
H
原理图
ANT SW
HPF
RF SW
D11
C123
C122
L13
L7091CER
18p
15n
22p
D16
L7091CER
RF SW
C124
470p
D14,15
RF SW
5V
TX:8V
R72
RX:0V
0
IC9
S24CS02AFJTBG
8
1
A0
VCC
7
2
A1
WP
6
3
A2
SCL
5
4
GND
SDA
DC SW
Q5
E2PROM
DC SW
D
R68
R71
0
OP AMP
IC8
C127
NJM2904E-ZB
470p
1
8
AoUT
V-
2
7
A-IN
BoUT
3
6
A+IN
B-IN
4
5
GND
B+IN
CP1
RK75GB1J103J
OP AMP
IC6
NJM2904E-ZB
C98
1
8
AoUT
V-
470p
2
7
A-IN
BoUT
R49
3
6
A+IN
B-IN
0
4
5
GND
B+IN
I
NXR-800H
TX H:25W
LPF
L:5W
RX
:0W
CN22
L14
L15
R125
TX ANT
15n
15n
0
CN19
RX
CN20
36
GND
35
GND
Q6
34
WP
SSM3K15TE(F)
33
GND
32
D_GND
31
SDA
30
D_GND
29
SCK
28
D_GND
27
CONT_5.0V
26
D_GND
25
TEMP_PRT
24
GND
23
ANT_SW
22
GND
21
TEMP_RST
20
GND
19
FAN_CONT2
18
GND
17
FAN_CONT
16
GND
15
PWR_CONT
14
GND
13
PWR_PRT
12
GND
11
RFL_PWR
10
GND
9
FWD_PWR
8
GND
7
FAN_CURR
6
GND
5
PA_CURR
4
GND
3
2
GND
1
GND
R144
0
X45-3862-70 (A/5) 2/2
J
1
2
3
4
5
6
7
173

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