Kenwood TK-80 Service Manual page 102

TX-RX UNIT (PLL SECTION) (X57-4660-21)
Q801-804
AMPLIFIER
6.8V
1.8V
L802
L803
6.8V
5.3V Q801 R819
W1 2SC2714(Y) 7.5V
0
1 C800
Q802
NBI
TX-RX
2SC2714(Y) Q804
0.01u
-W1
NBG 2SC2714(Y)
2
4.6V
1.1V
TP801
5.3V
NB
0.16V
R804 R807
Q800 0.1V
R809
NB ON : 0V 22k 10k
SWITCHING 1.5k
OFF : 7.7V 6.8V
NB ON : 2.8V
OFF : 0V
NB ON : 1.0V
Q803
OFF : 7.8V
2SC2712(Y)
Q800
NBS DTC114EK
TO TX-RX UNIT
RBK
8A
RTK
SWITCHING 5.0V 5.0V
L508
0V
100u
R657
VDD
0V
100
VSS
IC508
TC4S66F
0V
IC502
MB86001PF
C653 220p
PLL
C657 220p
CN500
C658 220p
16
GND
C654 220p
15
VDLY
14
VB1
13
VB2
12
VB3
11
ULK
R655 100
10
PCK
R654 100
9
PDA
CONTROL
-CN5 R651 100
8
PEN1
R656 100
7
PLS
6
NC
R652 100
5
DEN1
R658 100
4
CASL
R653 100
3
DEN2
R659 100
2
ABSL
1
GND
5.0V
L500
100u
D500,501
34
SWITCHING
5.0V DA10
35
DA11
L501
36
VSS8
100u 37
PHS0
38
PHS1
39
VSS9
40
CLK
41
VDD5
42
ISD
43
ISC
44
IEN
DELAY
0V
R919
470
R902 C902
100k 100u10 VOX ON : 0.6V
OFF : 4.4V
+
Q900
C904 R906 Q903
VOX
VOX INPUT
1u 10k
AMPLIFIER
ON/OFF
1.3V
1.3V
C906
R900 C903
0.01u
10k 1u 0.7V
C910
GAIN
1u
5A
Q903
Q900
8F
TO TX-RX R913 DTC114EK
2SC2712(Y)
MIC
UNIT ANTI 10k
SP
VOXO
VOXS
Q805,807,808 Q806
SWITCHING BUFFER AMPLIFIER TP504
CV
VCO1
L545
3.3V
0.68u
73.145-83.544MHz
C812 R815
10p 56k
2SK508NV
4.7V C671 C675
39p 9p
L546
Q806
D800
2SC2714(Y)
0.3V
HSM276S
4.0V
C813 0.7V
Q808
0.01u
VARI-
DTC114EK
CAP
DETECTION
4.0V
0V 0V
7.7V
Q805
2SC2712(Y)
Q807
DTA114EK
7.8V
1.0Vp-p C527 C528 C529
0.01u 1u16 1u16
+ +
R547
5.0V
2.0V
7.5V
1.2k
R546 3.3V
Q508
Q510
2SC3722K(R)
18k
2.0V 2SC3722K(R)
1.5V Q509
0.36V
2SC3722K(R)
1.0V
Q508-510
LPF
2.0Vp-p
5.0V
L502
100u
22 34
VSS4 5.0V DA10 VSS4
21 35
DA3 3 DA11 DA3
L503
20 36
DA2 2 VSS8 DA2
19 100u 37
IC500 VSS3 PHS0 IC501 VSS3
18 38
F71022Z F71022Z
DA1 1 PHS1 DA1
17 39
DDS DDS
DA0 0 VSS9 DA0
16 40
VSS2 CLK VSS2
15 41
CHOP VDD5 CHOP
14 42
NCNP ISD NCNP
13 43
VDD2 ISC VDD2
12 44
TDA3 IEN TDA3
0V
VOX ON : 0.1V
NOR CIRCUIT
OFF : 0V
AMPLIFIER
R912 1M IC901
TC4001BFT
IC900
D900
0V
VOX ON : 0.66V 1 14
NJM2904M
8.0V
OFF : 0V VDD
1 8 1SS355 13
2
VCC
R917
7 12
0V
3
470k
2
0V 0V
4 11
D901
3 6
10 R918
4 5 R909 1SS355 5
GND 0V
0V C909
10k 6 9
0V
0V
7 8 2SC2712(Y)
1000p
VSS
SWITCHING
VOX ON : 0.64V
D900-902
OFF : 0V
REVERSE-FLOW PREVENTION
8A 8A
L547
0.68u
Q531
(K52) C681
D503
33p
SWITCHING
C713
2p
R663
3.3k
VARI-
CAP
Q530
DTC114EK
SWITCHING
VB2 VB2
VB3 VB3
8A 8A
Q511
AMPLIFIER
TP505
54MHz
BPF
2.0Vp-p
2SC2714(Y)
1.1V
FIN FIN
3.8V
R570
10k
Q514
BUFFER
AMPLIFIER
22
21 3.8V
3
20
R616
2
19
10k
18
1
17 Q522
0
16 BUFFER
AMPLIFIER
15
CHOP CHOP
14
13
12
RIN RIN
5A 5A
CLK CLK
8.0V
X501
VOX 20MHz
ON/OFF
VOX ON : 8.0V
OFF : 0.5V
Q902
DTA114EK
R907
100
VOX ON : 0V 5.0V
OFF : 8.0V
L540
4.6V 100u
10k
Q901
VOX
ON : 7.9V
OFF : 0.1V
R822 R821
0 0
VCO2
VCO3
L549
83.545-94.544MHz 0.68u
94.545-103.045MHz
Q533
Q535
2SK508NV
2SK508NV
(K52)
C685 C691 C695 (K52)
7p 20p 5p
L548 L550
3.7V
7.6V
C701
1000p
3.0V
R667 R671
0V 4.0V
4.0V 3.3k 0V 3.3k
D506
R823
VARI-
Q536
CAP
0
Q532 Q534 BUFFER
DTC114EK D505 DTC114EK
AMPLIFIER
D507
SWITCHING
SWITCHING SWITCHING
SWITCHING
Q512
BUFFER AMPLIFIER MIXER
IC503
7.3V
NJM2594V
3.6V
1
3.5V 170mVp-p
VCC
L509 L510 L511
R560 C536 C542 C543
2
2.9V OUTPUT1
Q511
3.3u 1.5u 2.2u
100 0.01 27p 27p
3
C535 Q512 OUTPUT2
C539 C541
2SC2712(Y) 4
1.8V 100p GND
3p 1.5p
Q516
BUFFER
IC504
AMPLIFIER
NJM2594V
MIXER
2.3V 600mVp-p
7.7V 2.9V
L529 5 4
C592
SIGIN GND C570
Q516
C564 6 3
10u 0.01u
2SC2712(Y) 47p
BYPASS OUTPUT2
1.7V
0.01u
2
C707 7
OUTPUT1
CARIN
0.01u 8 1
470mVp-p NC VCC
6.7V
L516
R572
6.3V
100u
100
L517 L518
22u 22u
7.6V 2.9V
C560 C562 5
Q514
2SC2712(GR) Q523
10p 22p C625
6
3.1V 2.4V
2SC2712(Y)
R574 1.7V
0.01u
C624 7
1k
8
0.01u 0.58Vp-p
Q523
0.51Vp-p
BUFFER
L534
6.3V R618 AMPLIFIER
100 100u L535 L536
R621
22u 22u 0
C617 C619
10p 22p
Q522
L532
2SC2712(GR)
3.1V
R620
100u
1k
R595
7.7V 100
2.3V
X502
Q518
L530 62.35MHz
BUFFER
AMPLIFIER
1.2u Q517
R597
1.6V
2SC2714(Y)
47k 7.7V
CRYSTAL OSC
3.5V
L531
C600 R598
Q518
3p 100 2SC2714(Y)
2.7V
8.0V
R632 R635 R682
TP501
22k 7.8V 100 10
2.4V
1.0Vp-p
Q525
2SC2714(Y)
Q526
7.5V
2.0V 7.5V
2SC2714(Y)
C642 R683 R638 2.7V 2.7V
7.5V
5p 10 100 R641 R644
3.4V
Q525 680 C645 680 C648
5.0V
CRYSTAL
1000p 0.01u
OSC
2.0V 2.0V
Q526-528
OPTION
Q527 Q528
BUFFER
SO-2
2SC2996(Y) 2SC2996(Y)
AMPLIFIER
7.6V
Q507
CN501
2SC2714(Y) C515 C516 C518 C520 R543 LO1
2.1V
47p 47p 6p 11p 10
1.4V 3.4dBm
L506 L507
73.145-
82n 56n 103.045MHz
Q507
Q536 AMPLIFIER
2SC2714(Y)
C704
1000p
TP502
54MHz
C554 C553
70mVp-p
0.75p 0.75p
L515 L514 L513
Q513
7.7V
BUFFER
AMPLIFIER
70mVp-p
8
NC
7 2.3V
CARIN
2.5V
C551 R569
6 C545
1.6V
BYPASS
Q513 1000p 560
0.01u
5 C549
2SC2714(Y)
SIGIN
1000p
170mVp-p
Q515
BUFFER
R579
AMPLIFIER
2.3V 22k
7.7V
L524 L525
C572 C574 C580 R581
Q515
47p 68p 5.6u 8.2u 0.01u 22
2SC2712(Y)
1.7V
C576 C578
R584 C586
33p 10p
0 0.01u
720mVp-p
40mVp-p
IC506
NJM2594V
MIXER
1.0Vp-p
4 IC505
SIGIN GND
UPC1686G
3
BYPASS OUTPUT2 MIXER
2
OUTPUT1
CARIN
1
4.6V
NC VCC
2.6V
4.8V
6.5V
240mVp-p
L527
100u
TP503
R628 1.7Vp-p
100
L539
R602
CN503
22k 7.7V
1
2.3V
2
CF500 7.1V
Q519
-1.2dBm
IN OUT C630
2SC2714(Y)
1.6V
10.695MHz
22p
C604 0.7V
1000p
Q524
Q519
2SC2714(Y)
BUFFER
AMPLIFIER
AMPLIFIER
TP506
62.35MHz
1.4Vp-p
CN502
L541 LO2
100u
+2.5dBm
L542
62.35MHz
10u
R607
2.7V
22k
L543
R648 C660 L533
7.7V 7.9V
180k 0.01u 4.7u 2.3V
R647 0.22u
Q520
2SC2714 C609 C611
270 0.6V 2.2V
(Y)
1000p 6p
C607
Q529
1.6V
2SC2712(Y) 1000p
1.5V
AMPLIFIER
Q520 Q521
2SC2714(Y)
BUFFER
AMPLIFIER AMPLIFIER
TX-RX-CN2
TX-RX CAR
-CN9
GND
TX-RX-CN3