Kenwood TKR-850 Service Manual page 85

A
TKR-850
TX-RX UNIT (X57-696X-XX) (A/2)
1
A2 SUB UNIT (TX VCO/PLL) (X58-4810-XX)
*
TX-CV
(TP102)
CN350
GND 1 1
STT 2 2
2
STT
8CL 3 3
8CLT
CV 4 4
9CL 5 5
9CLT
MO 6 6
* C223
C233
0.01u
3
4
5
6
A2 SUB UNIT (TX VCO/PLL)
X58-4810-XX C312 C314 C317 C324
-10 K,E 6p 12p 6p 0.22u/35V
-11 K2 5p 10p 5p 0.22u/35V
-12 K3 7p 12p 7p 0.33u/35V
A2 SUB UNIT (TX VCO/PLL)
X58-4810-XX D350 D351 D352
-10 K,E 1SV282 NO 1SV282
-11 K2 1SV282 NO 1SV282
-12 K3 NO 1SV282 NO
A2 SUB UNIT (TX VCO/PLL)
X58-4810-XX R350 R351 R352 R353
7
-10 K,E NO 0 NO 0
-11 K2 NO 0 NO 0
-12 K3 0 NO 0 NO
74
X57-696 (A/2) 1/4
B
SCHEMATIC DIAGRAM
D350
FREQUENCY
D354
CONTROL
MODULATION
L352
*
* R351
* L353 * D352
R353 * C356
*
FREQUENCY
CONTROL
GND
STT
8CL
CV
9CL
MO
*
* L350
* R350
FREQUENCY
CONTROL
L351
* * D353
R352
*
FREQUENCY
CONTROL
C320 C318
R316
1.5k
2.2u10 2.2u10
ACTIVE
FILTER
R312
Q300
2SC4116(GR) 330
R311
10k
R310
ACTIVE
FILTER
R320
3.3k
Q301
2SC4116(GR)
3.3k
L301
* * L302
IC1
BUFFER AMP
NJM4558E
1 8
AOUT
+V
7
2
A-IN BOUT
6
3
A+IN B-IN
4 5
-V B+IN
C179 0.01u
C350 C352 C353 C354 C355 C356 C357
470p 100p NO 470p NO 8p NO
470p NO NO 470p NO 7p NO
NO 100p 470p NO 10p NO 470p
D353 D354 D355 L301 L302 L303 L350
NO 1SV214 NO 15n 15n 22n NO
NO 1SV214 NO 15n 15n 18n NO
1SV282 NO 1SV214 18n 18n 27n 1u
R354 R355 R358 R359 R372 R373 R374 R375
33 NO NO 47 100k 100k NO NO
33 NO NO 47 100k 100k NO NO
NO 33 47 NO NO NO 100k 100k
C
U-TXVCO
(Used for K,E,K2)
* C368
Q350
L356 * C374
* * * R359
VCO OSC
U-TXVCO
(Used for K3)
MODULATION
R374
C369
*
* Q351
* C355 L357
*
VCO OSC
IC300
PLL
SA7025DK
10
11
PHA AUXIN
12 9
VSSA RA
13 8
PHI REFIN
R309
14 7
220 R305
PHP VCCP
0
6
R306 L306 15
VDDA RFIN
22
5
16
RN RFIN
17 4
RF VSS
L305 18 3
LOCK
STROBE
2
19
TEST DATA
1
L300 L304 20
VDD CLOCK
Q302
C321 2SC4226(R24)
4p
BUFFER
AMP
X3
16.8MHz
1 4
VC +VDC
2 3
GND OUT
C358 C359 C360 C361 C362 C363 C364 C365
NO 1.5p 0.1u NO 12p NO 470p NO
NO 1.5p 0.1u NO 12p NO 470p NO
3p NO NO 0.1u NO 18p NO 470p
L351 L352 L353 L355 L356 L357
L354
NO 1u 1u NO L34-4645-05 NO
1u
NO 1u 1u 1u NO L34-4605-05 NO
1u NO NO 1u NO L34-4607-05
NO
TX-RX UNIT
R376 R377 Q350 Q351 X57-696X-XX
180 NO 2SK508NV(K52) NO 0-11,2-70
150 NO 2SK508NV(K52) NO
NO 180 NO 2SK508NV(K52)
D
CN351
BUFFER
AMP GND 2 8 GND
Q355
2SC4226(R24)
C379 1 7 VO
VO
4p
C306
0.01u
C305
CN300
1000p
FIN 1 9 FIN
10 5C
C304 5C 2
1000p
LDT 3 11 LDT
EPT 4 12 EPT
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
L31
C89
10u
0.01u
C366 C367 C368 C369 C370 C371 C374 C375
7p NO NO 7p NO 0.5p NO
7p
7p NO NO 7p NO 0.5p NO
7p
NO 7p 8p NO 8p NO 0.5p
NO
L358 L359 L360 L361 L362 TC350
1u NO 1u NO 33n C05-0396-05
1u NO 1u NO 22n C05-0396-05
NO 1.5u NO 1.5u 33n NO
A2 C28 C29 C223 C224
K,E X58-4810-10 2P 2P 100P NO
0-12 K2 X58-4810-11 2P 2P NO NO
0-13 K3 X58-4810-12 8P 11P NO 3p
E
VO
-6.0dBm
C234
0.01u
MB
MO
C380 C381
0.5p NO
0.5p NO
NO 0.5p
TC351
NO
NO
C05-0396-05
C235 L42 L45 R179
NO 6.8n NO 0
NO 6.8n NO 0
100p 18n 18n NO