Kenwood TKR-850 Service Manual page 86

F
TX-RX UNIT (X57-696X-XX) (A/2)
VO
A3 SUB UNIT (RX VCO/PLL) (X58-4800-XX)
*
RX-CV
(TP101)
CN350
GND 1 1 GND
SRR 2 2 SRR
SRR
8CL 3 3 8CL
8CLR
CV 4 4 CV
9CL 5 5 9CL
9CLR
NC 6 6 NC
BUFFER AMP
MB
MO
A3 SUB UNIT (RX VCO/PLL)
X58-4800-XX C312 C314 C317 C355
-10 K,E 7p 12p 7p 5p
-11 K2 6p 15p 6p 5p
-12 K3 8p 18p 8p 6p
TX-RX UNIT
X57-696X-XX A3 C91
0-11,2-70 K,E X58-4800-10 4P
0-12 K2 X58-4800-11 4P
0-13 K3 X58-4800-12 5P
G
SCHEMATIC DIAGRAM
L352
R351
1u
0
FREQUENCY
CONTROL
L353 D352
* C356
R353 L356
*
1u
0
1SV282
FREQUENCY
CONTROL
L350
R350
1u
0
FREQUENCY
CONTROL
L351 D353
R352 * C355 L357
*
1u
0
1SV282
FREQUENCY
CONTROL
C320 C318
R316
1.5k
2.2u10 2.2u10
ACTIVE
FILTER
R312
*
Q300
2SC4116(GR)
R311
10k
R310
ACTIVE
FILTER
R320 3.3k
Q301
2SC4116(GR)
2.2k
* L301 *
IC2
NJM4558E
1 8
AOUT
+V
2 7
A-IN
BOUT
3 6
R76
A+IN
B-IN
100k
4 5
-V B+IN
C84 0.01u
C356 C363 C386 L301 L302 L303 L356
6p 15p 100p 18n 18n 22n L34-4608-05
6p 18p 22p 15n 15n 18n L34-4607-05
7p 15p 100p 18n 18n 27n L34-4609-05
R175
0
0
390
H
R368
33
R354 33
V-RXVCOL
C374
R359
C368 7p
47
0.5p
VCO OSC
Q350
DC SW
2SK508NV(K52)
Q352
2SC4116(Y)
V-RXVCOH
C369 7p
Q351
2SK508NV(K52)
VCO OSC
IC300
PLL
SA7025DK
11
10
AUXIN
PHA
12 9
RA
VSSA
13 8
PHI REFIN
14 7
R309 R305
*
PHP VCCP
0
15
R306 6
VDDA RFIN
22
16
5
RFIN
RN
17 4
VSS
RF
18 3
LOCK
STROBE
19
2
TEST DATA
20
1
CLOCK
VDD
L300
Q302
L302
2SC4226(R24)
C321
4p
BUFFER
AMP
4
1
R77
VC +VDC
47k
2 3
GND OUT
X2
16.8MHz
L357 R309 R312 R356 R357
L34-4608-05 330 330 220 180
L34-4607-05 390 390 180 150
L34-4609-05 330 330 220 180
I
TKR-850
CN351
BUFFER
AMP
2 8 GND
GND
Q355
2SC4226(R24) C379
VO 1 7 VO
4p
R362
4.7k
DC SW
R364
Q354
10k DTC114EUA
DC SW
Q353
2SC4116(Y)
R357
*
R363
4.7k
C306
0.01u
C305
CN300
1000p
FIN 1 9 FIN
C304
5C 2 10 5C
1000p
11 LDR
LDR 3
EPR 4 12 EPR
R304 100
DP 5 13 DP
R303 100
CP 6 14 CP
R302 100
REF 7 15 REF
R301 100
R300 10
R319 33
C325 4p
L32
C90
10u
0.01u
X57-696 (A/2) 2/4
J
VO
-3.0dBm
* C91
R162
270
MB
MO
75