Final Unit (X45-3520-21) - Kenwood TK-80 Service Manual

A
TK-80
SCHEMATIC DIAGRAM
FINAL UNIT (X45-3520-21) (A/2)
1
D1
CN1
DRV
TX-RX-CN19
2
POWER
W1
SUPPLY
14V
3
14V
GND
GND
D5
PROTECTION
DIODE
4
FAN
CN2
FAN+ 1 1
FAN-
2 2
R : 11.2V
T : 3.8V
T, PRO : 3.4V
5
6
7
80
X45-352 1/2
B
Q1
PRE-DRIVE
AMPLIFIER
TEMPERATURE
COMPENSATION
L3
R9
13.5V
R : 0V 3.3u
330
L1 T : 1.7V
0.39u
L4
C3
R3 0.1u
100
Q1
2SC1971-B
R : 0V
T : 0.92V
L5
C4
820p
VR1
R5
220
82 1/4W
D2
TEMPERATURE
COMPENSATION
D6
02CZ18(X)
ZENER
DIODE
D15
SURGE VOLTAGE
ABSORPTION
R : 13.7V
T : 11.8V
T, PRO : 11.6V
R23
18
1W
RELAY SURGE
ABSORPTION
0V
FAN ON : 5.9V
R24
18
R26
1W
470k
Q9
DTD123EK
FAN MOTOR
DRIVE
C
Q2,3
C13
0.01u
DRIVE
AMPLIFIER
5.6 1W
R : 0V
T : 0.69V
13.5V
5.6 1W
Q2
L8
2SC3133-B
Q3
2SC3133-B
5.6 1W
C14
0.01u L7
5.6 1W
R : 0V
T : 0.65V
Q4
2SC3421(Y)
D4
L9
MA27-B
4.7u
R : 0V
T : 1.34V
CN101
D3,4
D8
TEMPERATURE
PROTECTION COMPENSATION
DIODE
K1
13.6V
Q7
RELAY
DRIVE
Q7
DTC143TK
REGULATOR
D14
SWITCHING
D14
DAN202K
REGULATOR
SWITCHING
Q8
TRANSISTOR
DTC114EK
POWER ON : 4.3V
POWER OFF : 0.2V
F1
5A
4.3V
IC1
0.4V
NJM2904M
PRO : 6.0V
1 8
R36
7
2.2k
2
3 6
4 5
0.77V
COMPARATOR
FAN CONTROL
SWITCHING
TRANSISTOR
D
L11
R21
Q5,6
4.7 1W
R14
FINAL
Q5 AMPLIFIER
2SC2879A(O,Y)
R15
C24
L13
6800p
C25
6800p
R16
Q6
R17
2SC2879A(O,Y)
R22
L14
4.7 1W
L12
Q4
FINAL BIAS
SUPPLY
VR2
8.0V
R18
3.3k
390
L24
10u
13.5V
IC2
UPC7805H 5.0V
IN OUT
GND
IC3
UPC7808H 8.0V
IN OUT
GND
R43
100
D9
DAN202K
SWITCHING
Q12
DTC124TK
E
13.5V
L16
TXB
14AF
14AG
5A
DGND
8A
14S
14V
PSC
THP
BOVR