Kenwood TK-80 Service Manual page 101

F
TX-RX UNIT (PLL SECTION) (X57-4660-21)
8A
L547
0.68u
C681
33p
C713
2p
VARI-
CAP
VB2
VB3
8A
Q511
AMPLIFIER
TP505
54MHz
BPF
2.0Vp-p
2SC2714(Y)
1.1V
FIN
3.8V
R570
10k
Q514
BUFFER
AMPLIFIER
3.8V
R616
10k
Q522
BUFFER
AMPLIFIER
CHOP
RIN
5A
CLK
X501
20MHz
5.0V
L540
100u
Note : The components marked with a dot (
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G
R822 R821
0 0
VCO2
L549
83.545-94.544MHz
0.68u
Q533
2SK508NV
(K52)
C685 C691
7p 20p
L548 L550
R667
0V
3.3k
4.0V
D506
R823
VARI-
CAP
0
Q532
D505
DTC114EK
SWITCHING
SWITCHING
Q512
BUFFER AMPLIFIER
7.3V
3.6V
3.5V
L509 L510
R560 C536
2.9V
Q511
3.3u 1.5u
100 0.01
C535 Q512
C539
2SC2712(Y)
100p
1.8V
Q516
BUFFER
AMPLIFIER
2.3V
7.7V 2.9V
L529
C592
Q516
C564
10u
0.01u
2SC2712(Y)
1.7V
0.01u
C707
0.01u
470mVp-p
L516
R572
6.3V
100u
100
L517 L518
22u 22u
C560 C562
Q514
2SC2712(GR)
10p 22p
3.1V
2.4V
R574
1k
L534
R618
6.3V
100u
100
L535 L536
R621
22u 22u
0
C617 C619
10p 22p
Q522
2SC2712(GR)
3.1V
R620
1k
7.7V
2.3V
X502
L530 62.35MHz
1.2u
1.6V
2SC2714(Y)
CRYSTAL OSC
8.0V
R632 R635 R682
22k 7.8V 100 10
2.4V
Q525
2SC2714(Y)
Q526
7.5V
2.0V
2SC2714(Y)
C642 R683 R638
5p 10 100
3.4V
Q525
5.0V
CRYSTAL
OSC
Q526-528
OPTION
BUFFER
SO-2
AMPLIFIER
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H
SCHEMATIC DIAGRAM
VCO3
94.545-103.045MHz
Q535
2SK508NV
C695 (K52)
5p
3.7V
7.6V
Q536
2SC2714(Y)
C701
1000p
3.0V
1000p
R671
4.0V
3.3k
0V
Q536
Q534
BUFFER
DTC114EK
AMPLIFIER
D507
SWITCHING
SWITCHING
MIXER
IC503
NJM2594V
1
170mVp-p
VCC
L511
C542 C543
2
OUTPUT1 CARIN
2.5V
2.2u
27p 27p
3
OUTPUT2 BYPASS
C541
4
GND
3p 1.5p
IC504
NJM2594V
MIXER
600mVp-p
5 4
C570 C572
SIGIN GND
6 3
47p 47p
BYPASS OUTPUT2
2
7
OUTPUT1
CARIN
8 1
NC VCC
6.7V
NJM2594V
7.6V 2.9V
5
SIGIN
Q523
C625
6
2SC2712(Y)
BYPASS
1.7V
0.01u
C624
7
CARIN
8
0.01u
0.58Vp-p
NC
Q523
0.51Vp-p
BUFFER
AMPLIFIER
L532
100u
R595
100
Q518
BUFFER
AMPLIFIER
Q517
R597
7.7V
47k
3.5V
L531
C600 R598
Q518
3p 100 2SC2714(Y)
2.7V
L541
TP501 100u
1.0Vp-p
7.5V
2.7V 2.7V
7.5V
R641 R644
680 C645 680 C648 R647
1000p 0.01u 270
2.0V 2.0V
Q527 Q528
2SC2996(Y) 2SC2996(Y)
•
) are parts of layer 1.
I
7.6V
Q507
2SC2714(Y) C515 C516
2.1V
47p 47p
1.4V
Q507
AMPLIFIER
C704
TP502
54MHz
C554 C553
70mVp-p
0.75p 0.75p
L515 L514
Q513
7.7V
BUFFER
AMPLIFIER
70mVp-p
8
NC
7 2.3V
C551
6 C545
1.6V
Q513 1000p
0.01u
C549
5
2SC2714(Y)
SIGIN
1000p
170mVp-p
Q515
BUFFER
R579
AMPLIFIER
22k
2.3V
7.7V
L524 L525
C574 C580 R581
Q515
5.6u 8.2u
68p 0.01u 22
2SC2712(Y)
1.7V
C576 C578
R584
33p 10p
0
IC506
MIXER
1.0Vp-p
4 IC505
GND
UPC1686G
3
OUTPUT2 MIXER
2
OUTPUT1
1
VCC
6.5V
240mVp-p
R628
100
R602
7.7V
22k
2.3V
CF500
Q519
IN
2SC2714(Y)
1.6V
C604
1000p
Q519
BUFFER
AMPLIFIER
L542
10u
R607
2.7V
22k
L543
R648 C660
7.7V
4.7u 2.3V
180k 0.01u
2SC2714
0.6V
C607
Q529
1.6V
2SC2712(Y) 1000p
AMPLIFIER
Q520
BUFFER
AMPLIFIER
J
TK-80
CN501
C518 C520 R543
LO1
TX-RX-CN2
6p 11p 10
3.4dBm
L506 L507
73.145-
82n 56n 103.045MHz
L513
R569
560
C586
0.01u
720mVp-p
40mVp-p
4.6V
2.6V
4.8V
L527
100u
TP503
1.7Vp-p
L539
CN503
1
CAR
TX-RX
2
-CN9
GND
7.1V
-1.2dBm
C630
OUT
10.695MHz
22p
0.7V
Q524
2SC2714(Y)
AMPLIFIER
TP506
62.35MHz
1.4Vp-p
CN502
LO2
TX-RX-CN3
+2.5dBm
62.35MHz
L533
7.9V
0.22u
Q520
C609 C611
2.2V
(Y)
1000p 6p
1.5V
Q521
2SC2714(Y)
AMPLIFIER
89
X57-466 (PLL) 2/2
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