Kenwood TKR-750 Service Manual page 86

F
TX-RX UNIT (X57-695X-XX) (A/2)
VO
A3 SUB UNIT (RX VCO/PLL) (X58-4780-10)
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
10u
0
FREQUENCY
CONTROL
L353
D352 C356
R353
10u
0
33p
1SV282
FREQUENCY
CONTROL
L350
R350
10u
0
FREQUENCY
CONTROL
L351 D353
R352 C355
10u
0
1SV282 39p
FREQUENCY
CONTROL
C320 C318
R316
1.5k
2.2u10 2.2u10
BUFFER
AMP
Q300
2SC4116(GR)
BUFFER
AMP
R320
Q301
2SC4116(GR)
1k
C313
3p
L301
39n
BUFFER AMP
IC2
NJM4558E
1 8
R77
AOUT +V
47k
2 7
A-IN BOUT
3 6
A+IN B-IN
4 5
-V B+IN
C84 0.01u
H
R368
33
R354 33
V-RXVCOL
C368 18p
R359
C374
VCO OSC 1p
Q350
2SK508NV(K52) DC SW
L356
Q352
50n
2SC4116(Y)
V-RXVCOH
C369 15p
Q351
2SK508NV(K52)
L357
50n
VCO OSC
PLL
IC300
SA7025DK
11
PHA AUXIN
12
VSSA RA
13
PHI REFIN
R309
220 14
R312
PHP VCCP
220
R306 15
VDDA RFIN
R311
22
16
22k
RN RFIN
17
R310
RF VSS
6.8k
18
LOCK STROBE
19
TEST DATA
20
VDD CLOCK
L300
C316
3p
L302
C321
Q302
2SC4215(Y)
39n
47p
BUFFER
AMP
X2
16.8MHz
1 4
VC +VDC
2 3
GND OUT
I
TKR-750
CN351
BUFFER
AMP
GND
2
Q355
2SC4215(Y) C379
VO
1
10p
47
R362
4.7k
DC SW
R364
Q354
10k
DTC114EUA
DC SW
Q353
2SC4116(Y)
R357
R363
270
4.7k
10
9
C306
8 0.01u
7 C305
R305
CN300
0
1000p
6 FIN 1
C304
5 5C 2
1000p
4 LDR 3
3 EPR 4
R304 100
2 DP 5
R303 100
1 CP 6
R302 100
REF 7
R301 100
R300 10
R319 33
C325 5p
L28
C90
10u
0.01u
X57-695 (A/2) 2/4
J
VO
-6.2dBm
8 GND
7 VO
R160
270
9 FIN
10 5C
11 LDR
12 EPR
13 DP
14 CP
15 REF
MB
MO
75