Kenwood NXR-800 Service Manual page 68

A
NXR-800
TX UNIT(X56-3120-13)(A/3)
1
CN104 CN108
CN102 CN106
R885
CN105 CN109
0 CN103 CN107
2
Q1
VCO_A:457.5M 2.5V 3.1V
VCO_B:472.5M 2.5V 3.0V
CN101
CV
LMC7101BIM5
R118 4
INPUT-
CVT
0
5
V-
C187
VCO_MOD
3
100u
DC SW
DC SW
Q109
Q110
2SA1832F
SSM3K15TE(F)
0V
4
R165
440_CE
R166
SCLK1
R167
SDo1
R168
440_EN
5
LDT
CN810
LDT
R306
132_CE
R307
SCLK1
R308
SDo1
R309
6
132_EN
DC SW
Q303
2SA1832F
DC SW
Q301
SSM3K15TE(F)
0V
VCO_MOD
7
D_PC
68
X56-312 (A/3) 1/6
B
SCHEMATIC DIAGRAM
CN112 CN116 CN120
CN110 CN114 CN118
CN113 CN117 CN121
CN111 CN115 CN119
9Vʼ
C120
0.01u
C122 R120
OP-AMP
150
470p
IC102
3
INPUT+
2
V+
1
OUTPUT
R125 R124
1M 1M
<-- 400-470MHz
5V #2
R172
47
R171
47
R160
100k
1k
5V
1k
5V
1k
1k
5V #2
C320
0.01u
C321
OUTPUT
470p
INDICATOR
R870
D301
B30-2230-05 100
5V
DC SW
Q302
SSM3K15TE(F)
PLL
19.2MHz MOD PLL
IC303
ADF4001BRUZ
5V
C314
0.01u 9 8 R319
DGND REFIN
C323
1k 10 7 100k
CE AVDD
C325
1k 11 6
0.01u
CLK RFINA
C324
1k 12 5
0.01u
DATA RFINB
1k 13 4
0.01u
LE AGND
14 3
MUXoUT CPGND
15 2
DVDD CP
16 1 R318
5V
VP RSET
4.7k
L304
10u
5V #2
C
E100
F10-3081-04
L125 D108 C182
R176 L128
0 1u 2T
1SV283F 12p
D107,108
FREQUENCY
CONTROL
R178
0
D101,102
FREQUENCY
CONTROL
L105
R123 D102 C133 L108
0 1u 2T
1SV283F 10p
R188
0
LPF2
L210 L211
<-- 4.5MHz
1.5u 1.8u
C108 470p
C240 C241
220p 82p
0.1u
C109
470p
C110
0.1u
C111
R173 1k
5V
5V
RF PLL
IC101
LMX2352TMX/NP
R174
1k
C352
C112 0.1u
18p
L308
C343
5V
C113 470p
1.6V
390n
0.01u
C114 0.1u
RF AMP
C326
C115 470p Q304
2SC4617(R)
0.01u
1.3V
A-9
C890
1u
C319
0.1u
LPF8
BUFFER AMP
IC302
C305
NJU6368PF1
1 6
18p
FoUT VSS
C312 L301
2 5 C303
VDD XT
C317
3 4 390n
0.01u 0.01u
XT CoNT
0.1u
LPF7
C330 C336
47p 18p
L305 L307 C344
A-10
330n 390n
0.01u
Q305
2SC4617(R)
1.2V
RF AMP
R333 R337 R343
0 27k 0
SUMMING-AMP
IC305
MB
NJM2732V
CN302
1
AoUTPUT
R334 2
A-INPUT
BoUTPUT
C350
82k 3
A+INPUT
10p
B-INPUT
4
GND
B+INPUT
D
C189 C193 C194
10p 12p 15p
Q102
C195
2SK2539-7 R184
0.5p(B) 47
RF VCO
VCO_A:1.1V
VCO_B:1.6V
DC SW
Q107
7.9V
C188
2SC4116(BL)F
MODULATION
470p CONTROL
VCO-A
C192
470p
R181
9Vʼ
100k
C136 C142 C145
9p 12p 15p
Q103
2SK2539-7 C147 R133
0.5p(B) 47
VCO_A:1.6V
RF VCO
VCO_B:1.1V
DC SW
7.9V
Q108
C135
2SC4116(BL)F
MODULATION
470p
CONTROL
VCO-B
C140
9Vʼ
470p
BUFFER AMP
LPF6
IC307
NJU6368PF1
C355
5V
6 1
47p
VSS FoUT
L310
R379 5 2 C367
XT VDD
330n 0 C360 4 3
0.01u
CoNT XT
0.01u
19.2MHz -->
R303
<--19.2MHz
0
4.6V
7.9V
7.7V
C370 C379
R370
1.7V
A-11
C356 C364
R355 1.8k
0.01u 0.01u
Q307
2SC4617(R)
220
0.01u 0.01u
RF AMP
4.0V
<--19.2MHz
C376
C361
5V
470p
OP-AMP
0.1u
C362
8
IC306
LMC7101BIM5
V+
C381
7
470p
1
OUTPUT
6 0.01u
V-
2
V+
C359
5
3
INPUT+
10p
R360 INPUT-
100k
E
400-415MHz
DC SW
Q702
SSM3K15TE(F)
C198
R186
10k
470p
C102 1u
R187 0
Q101
SSM3K15TE(F)
DC SW
415-470MHz
R190
10k
5V #2
5V #2
LPF5
C372 C373
18p 47p
L311 L312
R380
390n 330n
47
5V #2
<--19.2MHz
8V #2
OSC-3 MB_CV2
CN304
2.5V
X301
L77-1981-05
oUT GND
VDD VC
L313
1u
MB_CV1
5
CN303
2.5V
4 R369
CVT-MOD
0
5V #2