Kenwood NXR-800 Service Manual Supplement page 111

F
TX UNIT (X56-3120-XX) (A/3)
7.9V
9Vʼ
C163
470p
C156 C162
9Vʼ
470p 470p
A-4
RF AMP
K:450-465MHz -->
Q104
K2:477-512MHz --> 2SC3356-A(R24)
C152
7.9V
470p
0.8V
1.6V
5V #2
LPF1 3dB
L112 L113
R145 R147 C167
18n 18n
0 18 7p
Q106
2SC3356-A(R24)
RF AMP
DDS (4.5MHz)
4.5MHz DDS
IC202
AD9835BRUZ
R243 1 FSADJUST 16
CoMP
3.9k 2 15
REFIN AVDD
C252 3 14
REFoUT IoUT
0.01u 4 13
5V
DVDD AGND
R242 5 12
DGND PSEL0
R241 470k 6 11
MCLK PSEL1
0 7 10
SCLK
FSELECT
8 9
SDAT FSYNC
R247 100k
R248 100k
R249 100k
5V #2
<--19.2MHz
8V #2
5V #2
C308 470p
C307 0.1u
OP-AMP
IC301
NJM2732V
1 8
AoUTPUT
V+
C302 2 7
A-INPUT
BoUTPUT
10p 3 6
A+INPUT
B-INPUT
4 5
GND
B+INPUT
CN701
MO
X56-3120-XX L120 L201 L202 L203
-10 K 22n 15n 15n 12n
-11 K2 15n 12n 12n 10n
G
SCHEMATIC DIAGRAM
VOLTAGE
REGULATOR
NJM2386ADL3-09
RIPPLE FILTER AMP
9V
Q105
2SC4116(BL)F
R134
9V
22
R139
1k
L117
C164 450-480MHz-->
7p 15n
L118
15n
5V #2
C171
0.01u C173
470p
C172
470p
3dB
5V 1.0V
*
L120
C174 R154
K:0.5V
470p 18
K2:0.4V
A-5
5V #1
C258
C253
10u35 0.1u
5V
C254
R255 C259
C256
0.1u
270k 0.1u
0.01u C255
5V
C257
A-8
0.1u
0.01u
RF AMP
LPF4
Q211
K:2.8V
2SC4617(R)
K2:6V K:2.2V
L214
C260 R257
K2:2.0V
4.5MHz -->
0.1u 0 47u
DC SW
Q210
SSM3K15TE(F)
R312 150k
5V
C313 120p
C316
10p R381
100k
L204 R316 C143 C148 C153 C202 C210 C211 C214
12n 27k 10p 15p 10p 7p 6p 6p 470p
10n 39k 8p 12p 8p 6p 5p 4p 10p
H
13.8V
IC104
V-2
T:1.5V
K
R:0V
T:1.6V
K2
R:0V
7dB
A-3
RF AMP
*
L201
R202 C201
Q201
2SC3356-A(R24)
47 470p
T:0.8V
R:0V
C270
0.1u
C271
0.1u
BPF1
5V
3dB
CF201
L72-1029-05 RF AMP
A-7
L215
R258 R260 C269
Q212
2SC4617(R)
47u 0 330 0.1u
C272
3.6V
0.1u
K:3.0V
K2:2.9V
5V #2
OP-AMP
5V
C387
IC308
NJM2732V
0.1u
C388 8 1
AoUTPUT
V+
470p 7 2
A-INPUT
BoUTPUT
6 3
A+INPUT
B-INPUT
5 4
GND
B+INPUT
R376 C391
56k 100u
C217
10p
470p
I
NXR-800
T:7.2V
R:0V
T:1.4V
K
R:0V
K:450-480MHz-->
T:1.6V
K2
K2:477-512MHz-->
R:0V
A-2
*
* L203
C210
C207 R210
7p 0
No ATT
<-- 4.5MHz
K:2.5V
LPF3 3dB
K2:2.4V
L216 L217 L218
R266 R268 C282
0 2.2u 2.2u 18 0.1u 680n
MOD
DIGITAL POTENTIOMETER
CN301
IC304
C328 100u
M62364FP-F
C329 100u 1 24 R344
MOD VIN1 VIN8
2 23 R345
VoUT1 VoUT8
3 22 R346
VoUT2 VoUT7
4 21 R347
VIN2 VIN7
5 20
5V
VDD GND
6 19
R321 10
VR_EN LD RESET
R322 10 7 18
SCLK0 CLK VDAREF
R323 10 8 17
SDo0 DI D0
R327 0 9 16 R348
PAG VIN3 VIN6
R328 0 10 15 R349
VoUT3 VoUT6
R329 100k 11 14 R350
VoUT4 VoUT5
R330 100k 12 13 R351
VIN4 VIN5
X56-312 (A/3) 2/6
J
13.8V
8V #1ʼ
T:7.8V
K
R:0V
T:7.9V
K2
R:0V
* *
C214 C217
R218
0
Q202
2SC5337
RF AMP
NO ATT
T:1.0V
R:0V
CN201
VS2
5V #1
C287 R276
5V
0.1u 0
A-6 No ATT
Q213
2SC4617(R)
RF AMP
1.9V
5V #2
<--19.2MHz
8V #2
5V #2
100k
100k
100k
100k
R357
100
2.5V
100k
100k
100k
100k
99