Kenwood TK-80 Service Manual page 95

A
TK-80
SCHEMATIC DIAGRAM
1
TX-RX UNIT (TX-RX SECTION) (X57-4660-21)
CN1
RAT
FINAL
RAT
-CN7
2
CN19
DRV
FINAL DRV
-CN1
3
4
J3
RELAY
5
J4
ALC
6
CN15
1
14S
8A
14AF
14AG
FINAL
-CN10
TXB
1
VSR
VSF 2
8
GND
7
84
X57-466 (TX-RX) 1/4
B
D1-4
LIGHTING SURGE
ABSORPTION
R : 9.7V
T : 0V
SWITCHING
TP4
C6
D7
L1
R1 0.1u
RLS135
0.27u
0 (3216)
C2
D5
1SV128
7p
D5
SWITCHING
Q1
2SD1757K
Q1
SWITCHING
L4
1m
C12 C15
1800p 1800p
Q29
DRIVE AMP
R : 13.5V
CW : 9dBm
T : 13.0V
AM : 6.5dBm
L72
R167
L73
10u
C218 2.2k
0.1u
Q29
2SC2954
C212
L74
0.1u
100u
T : 1.3V
T : 5.9V
T : 0.7V
R298
100
2
FEN1
IC10
UPD6345GS
SWITCHING
I/O PORT
EXPANTION
Q58
D66
2SC3649(S,T)
SURGE
ABSORPTION
R : 0V
T : 0.7V
R361
1k
D75
02CZ3.3(Z)
D75,80
D80
ZENER DIODE
02CZ4.7(Y)
REGULATOR
IC11
8.0V TA78L05F 5.0V
IN OUT
GND
2
Q59
13.47V 12.8V
2SD1624(S)
RIPPLE
FILTER
13.44V
1
2
Note : The components marked with a dot (
C
R7 180
R24 4.7k
R : 13.4V
DTC143TK
T : 0V R : 0V R : 0V
Q2
T : 12.9V T : 12.9V
2SA1213(Y)
Q2,3
SWITCHING
L7 L8
R2 R8
6.8u 6.8u
D8
100 100
RLS135
SWITCHING
D9-22
B1
SWITCHING
L11
D9 C25
6.8u
RLS135 1000p
R10
33
SWITCHING
L6 D6
1m
LFB01
B2 13.4V
L14
D11
C32
5.6u
RLS135 390p
R12
33
B3 13.4V
L17
D13
C39
2.7u
RLS135 270p
SWITCHING
D51
R14
33
LFB01
B4 13.4V
L20
D15
C46
2.7u
RLS135
120p
R16
33
B5 13.4V
L23
D17
C53
1.8u
B5
RLS135
82p
B6
B7
R18
B8
33
B6 0.2V
L26
D19
C60
1.2u
RLS135
68p
B1
R20
B2
33
B3
B4
B7 13.4V
L29
D21
C67
0.82u
RLS135
47p
R22
33
B8 13.4V
L81
D70
REVERSE-FLOW
1m PREVENTION
13.3V
D64
12.7V
Q56
RECTIFICATION
2SA1162
R308
(Y)
D64
47k R311
1SS226
C332
470
C330 C331 47u16
+
2200p 3300p
-1.7V -0.9V
Q57
Q55
2SC2712
2SC2712(Y)
(Y)
D65
0V
Q55-57
02CZ6.2(Y)
SWITCHING
ZENER
DIODE
1
2
D
D23.24
Q3
SWITCHING
L31 L32
D24
0.27u 0.27u
RLS135
R : 4.6V
T : 6.6V
C72 C74
D23
RLS135
6p 18p
L34
1m
D10
L35
R93
RLS135
47u
1k
AIP OFF : 11.1V
D12
R38
Q8,9
RLS135
L40
22
RF
AMPLIFIER 3.3u
Q8 2SK520
SWITCHING
2SK520 (K44)
(K44)
D25
L39
RLS135
R35
D14
220
RLS135
D50 D50
SWITCHING
RLS135
D16
RLS135
R : 0V
T : 2.3V
L70
VR3
D18
L71
RLS135
100u
R163
R : 0V
1k
T : 2.3V
R : 0V
T : 7.7V
D20
RLS135
Q60-63
LED
R322
330
Q62
2SC2712(Y)
Q60
Q61
2SC2712
D22
2SC2712(Y)
(Y)
RLS135
R321
10k
D71
02CZ12(Y)
R330 C349
D70
100 10u16
1SS355 +
C348 R331
1
0.01u 100k
ZENER
DIODE
Q67
DTC114EK
L82 -6.2V
1m
-6.3V
Q67,68
SWITCHING
Q68
DTC114EK
D72
REVERSE-FLOW
PREVENTION
1-3
14AG
1 3
•
) are parts of layer 1.
E
RXB
RATB
L33
RXS1
RXS2
RXB
AIPB
SWITCHING
D26
L41
RLS135
Q9
AIP OFF :
3.4V
RAB
Q27,28
TX 2nd MIX
LO1
Q27
TX1
3SK131
(M)
TXS1
BAL
TXS2
1k
LO1
Q28
TX2
3SK131
(M)
TXB
ALC
AMPLIFIER
R324
1k
Q63
2SC2712(Y)
R323
330
VR12
10k
ALC
VOLTAGE
Q69
FMC1
SWITCHING
1
FEN1
2
8F
3
AMB
TXB
14AF
5A
8A