Kenwood NXR-800 Service Manual page 71

P
TX UNIT (X56-3120-13) (A/3)
400-430MHz
13.8V
SCLK0
SDo0
8V #1
5V #2
<--19.2MHz
5V #1
8V #2
When kxk-3 or extenal reference signal is used.
5.99MHz or 10MHz -->
Q407-409
DC SW
Q407
SSM3K15TE(F)
R427
oX_SCLK2
10 R430
oX_SDo2
10 R431
PLL_19_EN
10
SSM3K15TE(F)
REF_LDT
0V
CN809
REF_LDT
Q405
SSM3K15TE(F)
DC SW
5V #3
LPF14
L603 L604
C613 C620
A-18
0.1u 47u 47u 0.1u Q603
2SC4617(R)
RF AMP
DETECTOR
D403
HSM88AS-E
R547
4.7k
INT VCXO:0V
OCXO or
EXT Ref:
G:2.7V
S:0.6V
RF AMP
D:7.9V
Q422
RD01MUS1-T113
2dB A-20
C535
L422
L39-1517-05
R530
0.1u
12
R541
8V #1ʼʼ
1
Q
SCHEMATIC DIAGRAM
When internal reference signal is used.
REF_IN
CN808
IC404
19.2MHz PLL
ADF4001BRUZ
9 DGND
10
CE
11 CLK
12
Q408
DATA
SSM3K15TE(F)
13
LE
5V
14
MUXoUT
15
DVDD
Q409
16 VP
R438
Q410
2SA1832F
100k
19.2MHz PLL
DC SW
L403
C416
R439
1u 2.2
0.01u
R455
1M
Q604
SSM3K15TE(F)
DC SW
INT VCXO:
B:1.7V
C:5V
E:1.1V
OCXO or EXT Ref:0V
CF601
LPF15
L72-1019-05
L606 L607
C623
R616
0.1u 0 12u 12u
C539 0.1u
8V #1ʼʼ
R562 100k
OP-AMP
IC409
TA75S01F-F
3 4 R575
IN(-) oUT
2 4.7k
VEE
1 5 C545
IN(+) VCC
0.1u
R564
22k
INT VCXO:0V
OCXO or EXT Ref:
G1:2.1V G2:2.1V
S:1.1V D:7.9V
L426
L39-1517-05
R560
A-21
C559
0
<--10MHz
0.1u
Q430
3SK317-E
RF AMP
R
R458
LPF11
8 100k
5V
C454 C459
REFIN
C440
7
47p 18p
AVDD
L409 L411
C443 C464
6
0.01u
RFINA
C441 330n 390n
5
0.01u 0.01u
RFINB
4
0.01u
AGND
3
CPGND
2
CP
1 R459
R470 R461 R453 R447 R460
RSET
4.7k
0 0 0 0
L406
10u
R454
1M
R618
DC SW
100k
Q605
C631
SSM3J01F
0.1u
C632
INT VCXO:
B:3.1V
0.01u
C629 R620
C:5V
E:2.4V
100k
0.1u
OCXO or EXT Ref:0V
RF AMP
Q606
C630
2SC4617(R)
C628
R617 0.1u
A-19 <--5.99MHz
0.1u 470
DETECTOR
LPF18
C563 C564
120p 47p 2dB L427
L39-1517-05
C565 L430 L431
R593
560n 680n
0.1u 12
D603,604
LIMITTER
S
NXR-800
8V #2
7.7V
A-17
1.7V
C479
<--19.2MHz
RF AMP
Q415
0.01u
2SC4617(R)
1.1V
L412
1u
OSC-4
VC VDD
18k
GND oUT
C465 C476
R481
X401
L77-1981-05
0.01u 1.8k 0.01u
DDS (5.99MHz)
5.99MHz DDS
IC601
AD9835BRUZ
5V
C633
16 1 R623
FSADJUST
CoMP
15 2 3.9k
0.01u
AVDD REFIN
C634
14 3
IoUT REFoUT
13 4
0.01u
AGND DVDD
12 5
PSEL0 DGND
11 6
PSEL1 MCLK
10 7
FSELECT SCLK
9 8
FSYNC SDAT
INT VCXO:0V
OCXO or EXT Ref:8.0V
R567 3
2
4.7k
1
INT VCXO:0V
OCXO or EXT Ref:
G:2.6V
S:0.5V
RF AMP
D:7.9V
Q425
C547
R569
RD01MUS1-T113
560
0.1u
C537
A-22 R554
18
0.1u
3dB
R576
1
X56-312 (A/3) 4/6
T
400-430MHz
13.8V
SCLK0
SDo0
8V #1
5V #2
<--19.2MHz
5V #1
8V #2
R501
220
8V #2
7.9V
4.7V
A-16
RF AMP
Q417
2SC4617(R)
C480
4.0V
0.01u
5V #3
5V
R625
0
<--19.2MHz
8V #1ʼʼ
C532 0.1u
R552 100k
IC408
TA75S01F-F
4
IN(-) oUT
VEE
5
IN(+) VCC
OP-AMP
R553
22k
L424
L39-1517-05
8V #1ʼʼ
<--10MHz
10MHz--->
71