Kenwood NXR-800 Service Manual page 133

F
TX UNIT (X56-3120-10) (A/3)
7.9V
9Vʼ
C163
470p
C156 C162
9Vʼ
470p 470p
A-4
RF AMP
Q104
2SC3356-A(R24)
450-480MHz--> C152
7.9V
470p
0.84V
1.58V
5V #2
LPF1 3dB
L112 L113
R145 R147 C167
18n 18n 0 18 7p
2SC3356-A(R24)
RF AMP
DDS (4.5MHz)
4.5MHz DDS
IC202
AD9835BRUZ
R243 1 FSADJUST
CoMP
3.9k 2
REFIN AVDD
C252 3
REFoUT IoUT
0.01u 4
5V
DVDD AGND
R242 5
DGND PSEL0
R241 470k 6
MCLK PSEL1
0 7
SCLK
FSELECT
8
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
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 1.01V
L120
C174 R154
Q106
22n 470p 18
0.45V
A-5
5V #1
C258
C253
10u35 0.1u
5V
C254
R255 C259
16 C256
0.1u
270k 0.1u
15 0.01u C255
5V
A-8
14 0.01u C257
RF AMP
LPF4
Q211
13 0.1u
2.77V
2SC4617(R)
L214
12 4.5MHz --> C260 R257
2.18V
11 0.1u 0 47u
10
DC SW
9 Q210
SSM3K15TE(F)
R312 150k
5V
C313 120p
C316
10p R381
100k
H
13.8V
IC104
V-2
T:1.53V
R:0V
7dB
A-3
RF AMP
L201
R202 C201
Q201
2SC3356-A(R24)
47 470p 15n
T:0.8V
R:0V
C270
0.1u
C271
0.1u
BPF1
5V
3dB
CF201
L72-1029-05
A-7 RF AMP
L215
R258 R260 C269
Q212
2SC4617(R)
47u 0 330 0.1u
C272
3.61V
0.1u
2.96V
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
I
NXR-800
T:7.15V
R:0V
T:1.44V
450-480MHz-->
R:0V
A-2
L203
C207 R210 C210
7p 0 6p 12n
No ATT
<-- 4.5MHz
LPF3 3dB
L216 L217 L218
R266 R268 C282
0 2.2u 2.2u 18 0.1u 680n
2.49V
1.94V
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:7.82V
R:0V
C214 R218 C217
470p 0 10p
Q202
2SC5337
RF AMP
NO ATT
T:1.03V
R:0V
CN201
VS2
5V #1
C287 R276
0.1u 0
5V
A-6 No ATT
Q213
2SC4617(R)
RF AMP
5V #2
<--19.2MHz
8V #2
5V #2
100k
100k
100k
100k
R357
100
2.53V
100k
100k
100k
100k
121