Kenwood NXR-700 Service Manual page 128

A
NXR-700
1
TX UNIT(X56-3112-72)(A/3)
.
.
CN104
CN102
.
.
CN103
CN105
.
R884
0
2
Q1
VCO_A:140.5M 2.15V 2.40V
VCO_B:149.5M 2.20V 2.41V
.
CV
CN101
CHK1.5B
R118
CVT
0
C122
470p
C120
0.01u
C187
VCO_MOD
100u
3
.
.
DC SW
Q110 Q109
SSM3K15TE(F)
0V
4
2SA1832F
DC SW
.
. R165
440_CE
. R166
SCLK1
R167
.
SDo1
R168
440_EN
LDT
5
OUTPUT
.
. INDICATOR
D301
CN810
B30-2230-05
CHK1.0B
DC SW
LDT
Q302
SSM3K15TE(F)
R306 1k
132_CE
R307 1k
SCLK1
R308 1k
SDo1
R309 1k
132_EN
6
Q303
2SA1832F
DC SW
DC SW
0V
Q301
SSM3K15TE(F)
7
126
X56-311 (A/3) 1/6
B
SCHEMATIC DIAGRAM
. .
. .
. . . .
CN120
CN108 CN112 CN116
CN106 CN118
CN110 CN114
. . . .
.
. .
.
CN107 CN111 CN115
CN119
CN109
CN113 CN117
CN121
. .
OP-AMP
R856 R120
IC102 22
10
BU7261G
3
4
OUT
IN-
2
VSS
5 1
VDD
IN+
R125
5V #2
1M
<-- 272-308MHz
5V #2
.
.
.
R172
.
47
R171
47
.
. C108
. C109
C110
.
.
C111
.
R173 1k
R160
5V
100k
5V
.
LMX2352TMX/NP
.
1k
R174 1k
5V
.
1k
5V
.
1k C112 0.1u
C113 470p
1k .
. C114 0.1u
C115 470p
5V #2
PLL
IC303
ADF4001BRUZ
5V
R319
9
8
DGND
REFIN
C323 .
100k
10 CE 7
AVDD
0.01u C325
6
11 CLK
RFINA
C324 0.01u
5
12
DATA
RFINB
0.01u
4
13
LE
AGND
3
14 MUXoUT
CPGND
15 2
DVDD
R311
CP
1
16
VP
100k
5V
RSET
R318
. 4.7k
C885
L304 10u
0.1u
5V #2
C
FREQUENCY
E100
CONTROL
F10-3081-04
D107,108
. . .
. .
1SV283-KENW,E
R176 L125 D108 C182
L128
3.5T
1.5u
27p
0
R178
0
D101,102
FREQUENCY
CONTROL
. .
. .
.
1SV283-KENW,E
R123 L105
D102
C133 L108
1.5u
3.5T
0
18p
R188
0
.
L210 L211 <-- 4.5MHz
1.5u 1.8u
.
C241
C240
5V #2
82p
220p
470p
0.1u
1.64V
5V
0.01u
470p
Q304
C326
0.1u
RF AMP
0.01u
KTC4075E-P(GR
1.31V
RF PLL
C320
IC101
C319 0.1u
0.01u
C321
BUFFER AMP
470p
IC302
NJU6368PF1
R870
1
FoUT
100
2
VDD
5V 3
XT
. .
C330 C336
. .
.
47p 18p
L305
L307
C344
.
330n 390n
0.01u
Q305
KTC4075E-P(GR
RF AMP 1.13V
R333
R337 R343
27k 0
0
R358
1M
5V #2
.
SUMMING-AMP
CN302
CHK1.0B
MB
1
R334
2
33k
3
4
D
. .
.
C189 C193 C194
.
10p
10p 10p
. .
Q102
C195 R184
2SK508NV(K52)
47
0.75p
D112 VCO_A:1.29V
VCO_B:1.83V
MODULATION
CONTROL
RF VCO
.
DC SW
Q107
.
7.69V 2SC4116(BL)F
.
C188
C192
470p
VCO-A
470p
.
9V'
R181 100k
. . .
C142 C145
C136
9p . 10p
10p
. .
Q103
2SK508NV(K52)
C147 R133
47
0.75p
VCO_A:1.87V
VCO_B:1.31V
RF VCO
.
DC SW
Q108
.
7.69V
2SC4116(BL)F
C135
MODULATION
CONTROL
.
470p
VCO-B
C140
470p
9V'
BUFFER AMP
IC307
NJU6368PF1
C352 C355
6 1
18p 47p FoUT
VSS
C343 L308 L310
C367
R379 5
2
VDD
XT
390n 330n
0 C360 0.01u
4 3
XT
CoNT
0.01u
19.2MHz -->
C305 18p
VSS 6 L301
C312 C303
R303
XT 5
C317 390n
0.01u 0.01u
CoNT 4
0.1u
7.88V
4.7V
. . .
7.72V
R370
. C370 C379
. .
1.69V
.
C364
C356 R355 1.8k
0.01u 0.01u
Q307
220 0.01u
0.01u
KTC4075E-P(GR
<--19.2MHz
4.05V RF AMP
OP-AMP
C381
IC306
0.01u
C376
1 IN+ 5
VDD
470p
2 VSS
R369
3 IN- 4
OUT
0
BU7261G
5V #2
5V C361
IC305
0.1u
C362
AoUTPUT
V+ 8
470p
A-INPUT
BoUTPUT 7
A+INPUT
B-INPUT 6
C359
GND
B+INPUT 5
10p
R360
100k
NJM2732V
E
272-290MHz -->
DC SW
Q702
SSM3K15TE(F)
9V'
10k C198
R186
470p
C102 1u
R187
0 Q101
SSM3K15TE(F)
DC SW
290-308MHz-->
5V #2
10k
R190
<-- 272-308MHz
5V #2
C372 C373
47p
5V 18p
L311 L312
R380
390n 330n
47
5V #2
<--19.2MHz
0
8V #2
.
.
MB_CV2
X301
CN304
L77-1981-25
CHK1.0B
2.5V
oUT
GND
+VDC
VC
19.2MHz
8V #2
.
MB_CV1
2.51V
CN303
CHK1.0B
5V #2