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NiCom NT3K Service Manual page 34

Medium/high power fm broadcast transmitter

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+24V
+24V
+15V
+15V
+5V
+5V
GND
-15V
-15V
Interlock
R185
47K
REFLECT POWER
+5V
R186
R194
4K7
2K2
R195
U19B
15K
LM358
5
+
MAX-SWR
R187
7
2K
6
-
R201
4K7
R197
470K
R196
560
C168
1nF
FORWARD POWER
+5V
R203
R198
4K7
+5V
2K2
R199
U19A
15K
LM358
3
+
MAX-PWR
R180
1
2K
2
-
R202
4K7
R183
560
R184
10K
C167
1nF
+5V
+15V
C91
10MF / 35V
R81
47K
R83
U12A
D16
100K
LM358
15V
J29
R85
24V
3
+
47K
1
2
-
R86
47K
J30
D35
15V
5V1
C92
0.1MF
+5V
R101
18K
U12B
LM358
5
+
7
6
-
C159
0.1MF
R181
C98
R182
+
4K7
2.2MF / 50V
470K
C160
1nF
R188
47K
+5V
C102
10MF / 35V
R112
U13A
15K
LM358
3
+
1
2
-
R114
4K7
FWD
R200
47K
R115
50K
R117
C105
10K
0.1MF
+24V
C93
R82
+
100MF / 25V
47K
R84
27K
Q2
BC327
R204
27K
R89
10
D17
+5V
LL4148
R92
4K7
R94
D18
47K
LL4148
R95
47K
Q4
BC327
R96
12K
C95
Q5
BC337
0.1MF
R97
47K
-15V
-15V
R98
R99
560
100
D19
15V
R100
27K
Q7
C99
+
BC337
4.7MF / 35V
R102
100K
-15V
-15V
-15V
R104
U13B
18K
LM358
R105
5
10K
+
7
6
-
R106
1K5
+
C100
2.2MF / 50V
RFL
R107
50K
R110
C101
10K
0.1MF
R113
10K
+15V
C103
+
2.2MF / 50V
C104
10MF / 35V
U14A
LM358
3
+
1
2
-
R118
R119
10K
10K
R205
47K
Q16
BC327
J36
R88
15V
1K2
LED RF
J35
R87
24V
2K2
R90
10
ADJ-A
C94
+
10MF / 35V
R91
ADJ-B
1K
ADJ-C
Q3
BC337
R93
47K
DRIVER OFF
+24V
Q6
C97
+
BDX53
2.2MF / 50V
+
C96
2.2MF / 50V
VADJ
V. GATE
RF RFL METER
U14B
LM358
R108
100
5
+
7
DB9_RFL_PW
6
-
R109
10K
R111
10K
RF FWD METER
R116
100
DB9_FWD_PW
N COM
Title
Protection & Meter
Size
Document Number
C
Mod. ESVA-1D
Date:
Tuesday, October 12, 2004
Rext 2
5K
RF ADJ.
Rev
1.0
Sheet
1
of
1

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