Kenwood NXR-800 Service Manual page 69

F
TX UNIT (X56-3120-13) (A/3)
7.9V
9Vʼ
C163
470p
C156 C162
9Vʼ
470p 470p
A-4
RF AMP
Q104
C164
2SC3356-A(R24)
C152
400-430MHz
7.9V
470p
0.8V
1.6V
5V #2
LPF1 3dB
L112 L113
C167
R145 R147
18n 18n
0 18 7p
Q106
2SC3356-A(R24)
RF AMP
DDS (4.5MHz)
4.5MHz DDS
IC202
AD9835BRUZ
R243 1 16
FSADJUST
CoMP
3.9k 2 15
REFIN AVDD
C252
3 14
REFoUT IoUT
4 13
5V 0.01u
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 A-INPUT 7
BoUTPUT
3 6
10p
A+INPUT
B-INPUT
4 GND 5
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
400-430MHz
15n
7p
L118
15n
5V #2
C171
C173
0.01u
470p
C172
470p
3dB
5V 1.0V
L120
C174
R154
22n
18
470p
0.5V
A-5
5V #1
C258
C253
10u35
0.1u
5V
C254
R255 C259
C256
0.1u
270k
0.1u
C255
0.01u 5V
A-8
C257
0.01u
RF AMP
LPF4
Q211
0.1u
2.8V 2SC4617(R)
L214
C260
R257
2.2V
4.5MHz -->
47u
0.1u 0
DC SW
Q210
SSM3K15TE(F)
5V #2
R312 150k
5V
C313 120p
C316
R381
10p
100k
H
13.8V
IC104
V-2
T:1.5V
R:0V
7dB
A-3
RF AMP
L201
C201
R202
Q201
2SC3356-A(R24)
15n
47
470p
T:0.8V
R:0V
C270
0.1u
C271
0.1u
BPF1
5V
3dB
CF201
RF AMP
L72-1029-05
A-7
L215
C269 Q212
R258 R260
2SC4617(R)
47u
0 330
0.1u
C272
3.6V
0.1u
3.0V
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
C391
R376
56k 100u
I
NXR-800
T:7.2V
R:0V
T:1.4V
R:0V
400-430MHz A-2
L203
C207 C210
R210
12n
0
7p 6p
No ATT
<-- 4.5MHz
LPF3 3dB
2.5V
L216 L217 L218
R266 C282
R268
2.2u 2.2u 680n
0 18 0.1u
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
R:0V
C214 C217
R218
0
470p 10p
Q202
2SC5337
RF AMP
NO ATT
T:1.0V
R:0V
CN201
VS2
5V #1
C287
R276
5V
0
0.1u
No ATT
A-6
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
69