Kenwood TK-80 Service Manual page 102

TX-RX UNIT (PLL SECTION) (X57-4660-21)
Q801-804
AMPLIFIER
6.8V
1.8V
L802
6.8V
5.3V Q801 R819
W1 7.5V
2SC2714(Y)
0
1 C800
Q802
TX-RX NBI
2SC2714(Y)
0.01u
-W1
NBG
2SC2714(Y)
2 4.6V
TP801
5.3V
NB
R804 R807
Q800
NB ON : 0V 22k 10k
SWITCHING
OFF : 7.7V 6.8V
NB ON : 2.8V
OFF : 0V
NB ON : 1.0V
Q803
OFF : 7.8V
2SC2712(Y)
Q800
DTC114EK
NBS
TO TX-RX UNIT
RBK
8A
RTK
SWITCHING 5.0V
0V L508
100u
R657
VDD
100 0V
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
2 R659 100
ABSL
1
GND
5.0V
L500
100u
D500,501
SWITCHING 5.0V
L501
100u
DELAY
0V
R919
470
R902 C902
100k 100u10
+
Q900
C904 R906
VOX
1u 10k
AMPLIFIER
1.3V
1.3V
R900 C903
10k 1u 0.7V
C910
GAIN
1u
5A
Q900
8F
TO TX-RX R913
2SC2712(Y)
MIC
UNIT ANTI 10k
SP
VOXO
VOXS
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Q805,807,808 Q806
SWITCHING BUFFER AMPLIFIER TP504
CV
L545
3.3V
0.68u
C812 R815
L803
10p 56k
4.7V C671
39p
L546
Q806
D800
0.3V 2SC2714(Y)
HSM276S
4.0V
C813 0.7V
Q804
Q808
0.01u
DTC114EK VARI-
1.1V
CAP
DETECTION
0V
Q805 7.7V
0.16V
2SC2712(Y)
0.1V
R809
Q807
1.5k
DTA114EK
7.8V
5.0V
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
34 22 34
DA10 VSS4 5.0V DA10
35 21 35
DA11 DA3 3 DA11
L503
36 20 36
VSS8 DA2 2 VSS8
37 19 100u 37
PHS0 IC500 VSS3 PHS0 IC501
38 F71022Z 18 38 F71022Z
PHS1 DA1 1 PHS1
39 17 39
DDS DDS
VSS9 DA0 0 VSS9
40 16 40
CLK VSS2 CLK
41 15 41
VDD5 CHOP VDD5
42 14 42
ISD NCNP ISD
43 13 43
ISC VDD2 ISC
44 12 44
IEN TDA3 IEN
0V
VOX ON : 0.1V
NOR CIRCUIT
OFF : 0V
AMPLIFIER
R912 1M IC901
VOX ON : 0.6V
TC4001BFT
OFF : 4.4V
IC900
0V D900
VOX ON : 0.66V 1
NJM2904M
8.0V
Q903 VDD
OFF : 0V
1 8 1SS355 2
VOX INPUT VCC
R917
ON/OFF 0V 7
3
470k
C906
2 0V
4
D901
0.01u 3 6
R909
4 5 1SS355 5
GND
0V 10k C909 6
0V
0V
7
1000p
VSS
Q903
VOX ON : 0.64V
DTC114EK D900-902
OFF : 0V
REVERSE-FLOW PREVENTION
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8A 8A
VCO1
L547
0.68u
73.145-83.544MHz
Q531
2SK508NV
C675 (K52) C681
D503
9p 33p
SWITCHING
C713
2p
R663
4.0V
0V 3.3k
VARI-
CAP
Q530
DTC114EK
SWITCHING
VB2 VB2
VB3 VB3
8A 8A
Q511
AMPLIFIER
TP505
54MHz
BPF
2.0Vp-p
1.1V
FIN FIN
3.8V
R570
10k
Q514
BUFFER
AMPLIFIER
22
VSS4
21
3.8V
DA3 3
20
R616
DA2 2
19
VSS3 10k
18
DA1 1
17 Q522
DA0 0
16 BUFFER
VSS2
AMPLIFIER
15 CHOP CHOP
CHOP
14
NCNP
13
VDD2
12
TDA3
RIN RIN
5A 5A
CLK CLK
8.0V
VOX
ON/OFF
VOX ON : 8.0V
OFF : 0.5V
Q902
DTA114EK
14 R907
13 100
12
VOX ON : 0V 5.0V
0V OFF : 8.0V
11
L540
10 R918
4.6V 100u
0V 10k
9
Q901
8 2SC2712(Y)
VOX
SWITCHING
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
D505
DTC114EK 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
OUTPUT1
2.9V
Q511 2.5V
100 0.01 3.3u 1.5u 2.2u 27p 27p
2SC2714(Y) 3
OUTPUT2
C535 Q512
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) BYPASS OUTPUT2 47p
1.7V
0.01u
C707 7 2
OUTPUT1
CARIN
0.01u 8 1
470mVp-p NC VCC
6.7V
L516
R572
6.3V
100 100u
L517 L518
22u 22u
7.6V 2.9V
C560 C562 5
Q514
SIGIN
2SC2712(GR) Q523
10p 22p C625 6
3.1V
2.4V 2SC2712(Y) BYPASS
R574 1.7V
0.01u
C624
7
1k CARIN
0.01u 8
0.58Vp-p
NC
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)
7.7V
47k
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
X501 1.0Vp-p
Q525
20MHz
2SC2714(Y)
Q526
2.0V 7.5V 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 TX-RX-CN2
47p 47p 6p 11p 10
1.4V 3.4dBm
L506 L507
73.145-
103.045MHz
82n 56n
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
C551 R569
C545
6 1.6V
BYPASS
Q513 1000p 560
0.01u
C549
5
2SC2714(Y)
SIGIN
170mVp-p 1000p
Q515
BUFFER
R579
AMPLIFIER
2.3V 22k
7.7V
L524 L525
C572 C574 C580 R581
Q515
5.6u 8.2u
47p 68p 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
GND
UPC1686G
3
OUTPUT2 MIXER
2
OUTPUT1
1
4.6V
VCC
2.6V
4.8V
6.5V
240mVp-p
L527
100u
TP503
R628 1.7Vp-p
100
L539
R602
CN503
7.7V
22k
1
TX-RX CAR
2.3V
2
-CN9
GND
7.1V
CF500
Q519
-1.2dBm
C630
2SC2714(Y) IN OUT
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
TX-RX-CN3
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
Q521
Q520
2SC2714(Y)
BUFFER
AMPLIFIER AMPLIFIER