Kenwood NXR-800 Service Manual Supplement page 107

P
RX UNIT (X55-3100-XX)
OP-AMP
IC6
LMC7101BIM5
1
OUTPUT
2
V+
3
INPUT+
INPUT-
C175
100p
*
R26
0
FREQUENCY
CONTROL
R43
0
*
R27
0
FREQUENCY
CONTROL
R400
0
R11
680
PLL ACTIVE
FILTER AMP
2SC4116(BL)F
R12
1k
2SC4116(BL)F
PLL ACTIVE
FILTER AMP
RF AMP
Q3
2SC4617(R)
1.6V
L10
C25
0.1u 680n
K:1.1V
K2:1.0V
X55-3100-XX TH2 TH3
-10 K NO NO
-11 K2 157-103-53007(10k) 157-103-53007(10k)
Q
SCHEMATIC DIAGRAM
R120 R128
VCO_A:457.5MHz 1.18V
K
10k 100 VCO_B:472.5MHz 2.22V
VCO_A:488.5MHz 3.04V
K2
VCO_B:503.95MHz 2.91V
CN63
5
V-
CV1
4
8.1V
FREQUENCY
CONTROL
*
L17 D5 C92
1SV283F
FREQUENCY
CONTROL
L18 D6 *
C93
1SV283F
RIPPLE
K:8.1V
FILTER AMP
K2:7.9V
Q6
R23 2SC4116(BL)F R46
0 33
R33 R40
1k 1k
K:1.7V
K2:1.8V
C58 C67
22u16 22u16
R38
Q4
K:1.1V
100
K2:1.2V
0.7V
Q2
K:5.1V
K2:5.0V
5V
L20 L23
C64 C87
0.1u 1.2u 1.2u 0.1u
L17 L18 L21 L22
L41-1095-33 L41-1095-33 L41-1095-33 L41-1095-33
L41-1098-40 L41-1098-40 L41-1098-40 L41-1098-40
R
RIPPLE
FILTER AMP
R64 2SC4116(BL)F
0
L27
R430 C113
330 1u 6p(B)
OSCILLATOR
Q7
L28 2SK508NV(K53)
C142
3T 0.5p
A_ON:2.6V
K
A_OFF:2.6V
A_ON:2.0V
K2
A_OFF:2.1V
VCO_A
DC SW
Q10
2SC4116(BL)F
*
L29 C114
R431
330 1u
OSCILLATOR
Q8 C143
L30
0.5p
2SK508NV(K53)
3T B_ON:2.4V
K
B_OFF:2.5V
B_ON:2.1V
K2
B_OFF:1.9V
VCO_B
DC SW
2SC4116(BL)F
*
R436
R44
0
L42
L26
15n
*
1u R57
C102
470p
6 20
CP
AVDD1
*
R65
7 19
AVDD2 RSET
8 18
REFIN VP
K:5.1V
9 17
K2:5.0V
DGND1 DVDD2
10 16
DGND2 DVDD1
IC5 R73
ADF4111BCP7
100k
FREQUENCY PLL
L40 L41 R31 R57 R65 R77 R78 R436
L41-1095-33 L41-1095-33 270 NO 8.2k 47 47 3.9k
L41-1098-40 L41-1098-40 470 47 10k 150 150 4.7k
S
NXR-800
Q9
R90
33
R71
1k
*
R77
R97
100
K:7.7V K2:7.8V
C187
K:2.0V
K2:1.9V
22p
RF AMP
R83
Q17
2SC3356-A(R24)
4.7k
K:1.3V
K2:1.2V
*
R78
Q14
SSM3K15TE(F)
Q11
DC SW
R84
4.7k
Q59
SSM3K15TE(F)
DC SW
R435
47k
Q61 Q60
SSM3K15TE(F) SSM3K15TE(F)
DC SW
DC SW
K:5.1V
RF AMP
K2:5.0V
Q16
L45
C156 2SC3356-A(R24)
1.6V
15n 10p
K:1.2V
K2:1.0V
L48
R72
1u
2.2
R85
33k
K:1.4mV
Q13
K2:0.2mV
2SA1832F
DC SW
Q15
SSM3K15TE(F)
DC SW
R456 R457 C89 C91 C92 C93 C94 C95 C106 C114
NO NO 22p 18p 5p 5p 6p(B) 5p 5p 5p(B)
47 47 18p(G) 12p 4p 4p 4p 4p 4p(G) 6p
T
L60 C220
22n
4p
L61 C214
22n 4p
L62
10n
PLL
INDICATOR
Q56
SSM3K15TE(F)
DC SW
C204 C205 C629
470p 470p NO
NO NO 470P
95
X55-310 4/6