Kenwood NXR-800 Service Manual page 132

A
NXR-800
TX UNIT(X56-3120-10)(A/3)
1
CN104 CN108
CN102 CN106
R881
0
CN105 CN109
CN103 CN107
2
Q1
VCO_A:457.5M 2.49V 3.08V
VCO_B:472.5M 2.54V 3.03V
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
132_EN
6
DC SW
Q303
2SA1832F
DC SW
Q301
SSM3K15TE(F)
0V
7
VCO_MOD
D_PC
120
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
470p 150
IC102
3
INPUT+
2
V+
1
OUTPUT
R125
R124
1M 1M
<-- 450-480MHz
5V #2
R172
47
R171
47
R160
100k
1k
5V
1k
5V
1k C112
1k C113
C114
C115
C890
5V #2
C320
0.01u
C321
470p
OUTPUT
INDICATOR
R870 1
D301
B30-2230-05 100 2
3
5V
DC SW
Q302
SSM3K15TE(F)
PLL
19.2MHz MOD PLL
IC303
ADF4001BRUZ
5V
C314
0.01u 9 8 R319
DGND REFIN
1k 10 7 C323 100k
CE AVDD
1k 11 6 C325
0.01u
CLK RFINA
1k 12 5 C324 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
D107,108
FREQUENCY E100
CONTROL F10-3081-04
L125 D108
R176 C182 L128
0 1u 8p 2T
1SV283F
R178
0
D101,102
FREQUENCY
CONTROL
L105
R123 D102 C133 L108
0 1u 1SV283F 2T
7p
R188
0
LPF2
L210 L211
<-- 4.5MHz
1.5u 1.8u
C108 470p
C240 C241
0.1u 220p 82p
C109
470p
C110
0.1u
C111
R173 1k
5V
5V
RF PLL
IC101
LMX2352TMX/NP
R174
1k
C352
0.1u 18p
L308
C343
5V
470p
1.63V
0.01u 390n
0.1u RF AMP
C326
470p Q304
0.01u 2SC4617(R)
1.3V
A-9
1u
C319
0.1u
LPF8
BUFFER AMP
IC302
C305
NJU6368PF1
6 18p
FoUT VSS
L301
5 C312 C303
VDD XT
4 C317 0.01u 390n 0.01u
XT CoNT
0.1u
LPF7
C330 C336
47p 18p
L305 L307
C344
A-10
330n 390n 0.01u
Q305
2SC4617(R)
1.18V
RF AMP
R333 R337 R343
0 27k 0
SUMMING-AMP
MB
IC305
CN302 NJM2732V
1
AoUTPUT
V+
R334 2
A-INPUT
BoUTPUT
100k C350 10p 3
A+INPUT
B-INPUT
4
GND
B+INPUT
D
C189 C193 C194
8p(B) 9p(B) 10p(C)
Q102
C195
2SK508NV(K52) R184
0.5p(B) 47
RF VCO
VCO_A:1.14V
VCO_B:1.62V
DC SW
Q107
7.9V
C188 2SC4116(BL)F
MODULATION
470p CONTROL
VCO-A
C192
470p
R181
9Vʼ
100k
C102
R187
C136 C142 C145
7p(B) 9p(B) 10p(C)
Q103
2SK508NV(K52) C147 R133
0.5p(B) 47
VCO_A:1.62V
RF VCO
VCO_B:1.14V
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 R380
47p
VSS FoUT
L310
R379 5 2 C367
XT VDD
0.01u
330n 0 C360 4 3
CoNT XT
0.01u
19.2MHz -->
R303
0
7.86V
4.64V
7.69V
C370 R370 C379
1.68V A-11
C356 R355 C364 0.01u 1.8k 0.01u
Q307
2SC4617(R)
0.01u 220 0.01u
RF AMP
3.98V
<--19.2MHz
C376
470p
5V C361 OP-AMP
IC306
0.1u
LMC7101BIM5
8 C362 C381
1
OUTPUT V-
7 470p 0.01u
2
V+
6
3
INPUT+
5 C359
INPUT-
10p
R360
100k
E
450-465MHz -->
DC SW
Q702
SSM3K15TE(F)
C198
R186
10k 470p
1u
0
Q101
SSM3K15TE(F)
DC SW
465-480MHz-->
R190
10k
5V #2
5V #2
LPF5
C372 C373
18p 47p
L311 L312
47 390n 330n
5V #2
<--19.2MHz
8V #2
OSC-3 MB_CV2
CN304
2.51V
X301
L77-1981-05
oUT GND
VDD VC
L313
1u
MB_CV1
5
CN303
2.52V
4 R369
CVT-MOD
0
5V #2