Kenwood NX-800 Service Manual page 80

K
NX-800
TX-RX UNIT (X57-7390-10)
L6
R40
10u
0
L40
R41 L7
10u
0
R352
0
CV
R25 R29 R35 R37
0 0 390 10k
R : 3.07V
T : 3.05V
2
R346 R204
22k 47
R213
1k
W : 2.89V
N : 0.29V
W : 0.99V
C330
N : 1.09V
0.1u
D201
DAN235E
SW CF SW
(W/N) (W/N)
C332
Q201
DTA114EE 0.1u
SW
(W/N)
W : 0V
Q202
N : 3.29V
DTC144EE
W : 3.27V
N : 0.02V
2
1
X57-739 3/16
L
SCHEMATIC DIAGRAM
D3,7,9,10
FREQUENCY
CONTROL
D7
C50 R84 C59
150p 0
1SV282-F
D4,8,11,12
FREQUENCY
CONTROL
C51 R85 D8 C58
150p 0
1SV282-F
L41
C55
C54
0.1u
1u
IC5
TC75W51FK(F)
1.65V
R27
1 8
VDD
7
47k
1.65V
2
R34
3 6
4 5
1k
VSS
VCO MODULATION/
BUFFER AMP (CV)
4.86V
C215
L202
100p
560n
L204
R207 R332 C211
47n
330k 0 10p
C208
0.01u
Q203
0.66V
2SC5636
2nd LOCAL
BUFFER AMP (X3)
4.97V
WIDE
CF201
W : 0.99V
L72-1017-05
N : 1.09V
R343 C331
IN oUT
CF SW
0 0.1u
(W/N)
D202
DAN235E
Narrow
CF202
L72-1021-05
R344 C333
IN oUT
1.5k 0.1u
M
R : 3.21V
T : 0V
L19
220n
RX VCO C66
6p
VCO
L18
22n
15p
Q5
2SK508NV(K52)
L21
180n
TX VCO C69
5p
VCO
L17
17.5n
12p
Q6
2SK508NV(K52)
TX
MODULATION
Q7
SSM6L05FU-F
R56
R49
470k
68k
R82 R83
0 0
4.98V
Q4
4.21V
2SC5383-T111
RIPPLE
FILTER
4.87V
2
C220 C222 C223
47p 0.01u 0.01u
TK10931VTL-G
1
C210
OSC<B>
2
0.1u
OSC<E>
3
MIXo
R210 10 4
VCC
C225 R338 10k
5
AMIFi
0.1u
C217 0.1u
6
AMIFdecp
R216 C228 0.1u
7
FMIFi
0
C218 4.7u
8
FMIFdecp1
C219 4.7u 9
FMIFdecp2
C227 82p
10
CD201 LIMo
11
QUADi
R219
12
FMDETo
L79-1850-05
10k
R215
2.7k
Q212
EMD9
2
1
N
R58
180
0.74V
R62
C74
150k
0.5p
Q9
2SC5636
BUFFER AMP
(VCO)
R : 0V
T : 3.47V
R153
120
C76
0.5p
Q8
2SJ347F
T/R SW
(VCO)
R : 0.02V
T : 3.31V
4.35V
IF IC
IC202
R345 C234
24
RFin
0 0.01u
23
GND
C232 0.1u
22
COMPo
21 R227 100k
COMPi
4.92V
R223
20
NAMPo
270k
C341 R334
19
NAMPi
1u 0
R230
18
AGC
22k
17
AGCAMPo
16 R234
RFAGCo
10k
15
RSSIo
14
AMSW
R228
13
AMDETo
22k
O
C79 TX
7p
3.94V
R237
100k
0.74V
RX
Q204
2SC3356(R23)
1st
IF AMP
2
1