Kenwood TKR-851 Service Manual page 86

F
TX-RX UNIT (X57-6962-70) (A/2)
VO
A3 SUB UNIT (RX VCO/PLL) (X58-4800-10)
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
MB
MO
G
SCHEMATIC DIAGRAM
L352
R351
1u
0
FREQUENCY
CONTROL
L356
L353 D352 C356
R353 L34-4608-82
1u
0
1SV282 6p
FREQUENCY
CONTROL
L350
R350
1u
0
FREQUENCY
CONTROL
L351 D353 C355
R352 L357
1u
L34-4608-82
0
1SV282 5p
FREQUENCY
CONTROL
C320 C318
R316
1.5k
2.2u10 2.2u10
ACTIVE
FILTER
R312
Q300
330
2SC4116(GR)
R311
10k
ACTIVE R310
FILTER
R320
3.3k
Q301
2SC4116(GR)
2.2k
L301 L302
18n
18n
BUFFER AMP
IC2
NJM4558E
1 8
AOUT
+V
2 7
A-IN BOUT
3 6
A+IN
B-IN
4 5
-V
B+IN
C84 0.01u
H
R368
33
BUFFER
R354 33
AMP
Q355
V-RXVCOL
2SC4226(R24)
C374
R359
C368 7p
47
0.5p
VCO OSC
Q350
DC SW
2SK508NV(K52)
Q352
2SC4116(Y)
R362
4.7k
R364
10k
V-RXVCOH
7p
C369
Q351
2SK508NV(K52)
R357
180
VCO OSC
PLL
IC300
SA7025DK
11
10
AUXIN
PHA
12
9
RA
VSSA
C306
13 8
0.01u
PHI REFIN
R309
14 7
330 R305
PHP VCCP
0
R306 15 6
VDDA RFIN
22
16
5
RFIN
RN
17
4
VSS
RF
18 3
STROBE
LOCK
19 2
TEST DATA
20 1
VDD CLOCK
L300
Q302
C321 2SC4226(R24)
4p
BUFFER
AMP
X2
16.8MHz
4
1
VC +VDC
3
2
GND
OUT
I
TKR-851
CN351
GND 2 8 GND
C379
VO
1 7 VO
-3.0dBm
4p
DC SW
Q354
DTC114EUA
DC SW
Q353
2SC4116(Y)
R363
4.7k
R162
270
C305
CN300
1000p FIN 1 9 FIN
C304 5C 2 10 5C
1000p
LDR 3 11 LDR
EPR 4 12 EPR
R304 100
13 DP
DP 5
R303 100
14 CP
CP 6
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
C91
4p
MB
MO
75