Kenwood NXR-800 Service Manual page 72

U
NXR-800
400-430MHz
13.8V
SCLK0
SDo0
8V #1
5V #2
<--19.2MHz
5V #1
8V #2
5V #1
LPF10
C462
18p
L413
C472
5V
390n
A-15
1.6V 0.01u
C482
R503 R502 RF AMP
Q416
10 0
0.01u
2SC4617(R)
1.2V
19.2MHz -->
19.2MHz -->
5V #3
LPF16
C638 C639 C889
47p 18p 0.1u
L612 L613
R629
C643
330n 390n 100
470p
5V
<--19.2MHz
Q607
SSM3K15TE(F)
Q608
SSM3K15TE(F)
Q609
SSM3K15TE(F)
Q607-609
DC SW
8V #1
DC SW
Q426
8V
SSM3J01F
8V #1ʼʼ
S-11 R582
DC SW 470k
Q428
SSM3K15TE(F)
INT VCXO:0V
OCXO or
EXT Ref:
R533
G1:1.9V
G2:1.9V 100k
S:0.9V
C516
D:7.9V
0.1u
<--10MHz RF AMP
Q420 Q431
C506
3SK317-E 3SK317-E
RF AMP
0.1u
A-24
A-23
8V #1ʼʼ
<--10MHz
10MHz--->
72
X56-312 (A/3) 5/6
V
SCHEMATIC DIAGRAM
L416
10u
LPF9
C430 C427
18p 47p
L407 L405
C437
C458
5V
1.6V
47p A-14 0.01u 390n 330n
L410
C455
RF AMP
330n Q412
0.01u
2SC4617(R)
1.5V
BUFFER AMP
IC602
NJU6368PF1
1 6
<--19.2MHz
FoUT VSS
C656
2 5 R630 R638
VDD XT
C645
3 4 1k 0.01u 4.7k
XT CoNT
470p
R406 10
oX_SCLK2
R407 10
oX_SDo2
R408 10
VCXO_DA_EN
LPF19
RF SW
C514
D404
JDP4P02U
120p
L421
C521
<--10MHz
560n
0.1u
C523
R538
INT VCXO:0V
1k
0.1u
OCXO or
EXT Ref:
G1:1.9V C531 R555
G2:1.7V
1k
S:0.8V 0.1u
D:7.7V
RF SW
D405
JDP4P02U
C601
3 4
0.1u
2 5
1 6
Q423
SSM6L05FU-F
DC SW
<--10MHz
W
5V #2
<--19.2MHz
5V #1
1.6V
C420
R434
R417 C414 A-12
0.01u 0
0
0.01u
1.6V
C415
R418 A-13
0
0.01u
3.3V XC6204B332M
C657
3.3V 5
VOUT
0.01u OSC-5
C658
4 1 4
NC
0.1u
C659
3 2
0.01u
VOLTAGE
REGULATOR
X601
L77-3034-05
8V #1
7.9V
A-25
4.3V
C511
Q419
47p 2SC4617(R)
3.7V
RF AMP
L420
C505
680n
0.1u
2.1V
C501
0.1u
D406
RF SW
HSC119
C541 10p
C542 10p
D407
RF SW
HSC119
3 4
2 5
D605,606
1 6
LIMITTER
Q421
SSM6L05FU-F
DC SW
OCXO
X
8V #2
NJM78M08DL1AZB
V-4
3
8V
NJM78M05DL1AZB
5V
V-5
3
5V #2
C406
5V
0.01u
RF AMP
Q401
2SC4617(R)
1.1V
C404
5V
0.01u
RF AMP
Q402
2SC4617(R)
1.1V
VOLTAGE
REGULATOR
IC705
5V NJM78M05DL1AZB
V-6
5V #3 3
oUT
IC603
1
VIN
2
VSS
3
CE
V-7
COMPARATOR
C484
IC405
TC75S59F-F
0.1u
3
IN+
C487
2
VSS
0.01u
R489 1
C492
IN-
2.7k
0.1u
R483 R480
DC SW
5.6k 6.8k
7.9V
Q414
SSM3K15TE(F)
A-26
C486
COMPARATOR
Q418 DETECTOR
0.1u
2SC4617(R)
IC406
D401
TC75S59F-F
RF AMP
1.5V
HSM88AS-E
R487 3
IN+
1k 2
VSS
1
IN-
R478
15k
DC SW
Q413
SSM3K15TE(F)
DC SW DC SW
Q424 Q429
SSM3K15TE(F) SSM3K15TE(F)
R568 R578
OCXO_EXIST
220k 0
Y
TX UNIT (X56-3120-13) (A/3)
400-430MHz
13.8V
SCLK0
SDo0
8V #1
VOLTAGE
REGULATOR
IC704
1
13.8V
oUT IN
GND
2
VOLTAGE
REGULATOR
IC706
1 8V #1
oUT IN
GND
2
19.2MHz -->
19.2MHz -->
1 8V #1
IN
GND
2
8V #1
4 R463
oUT
0
5
VDD
4
oUT
5
VDD
R452
0
REF_SW2
<--10MHz
<--10MHz
10MHz--->