TK-80
26
COMPONENTS DESCRIPTION
FINAL UNIT (X45-3520-21)
Ref. No.
Use / Function
Operation / Condition
IC1
Comparator
Fan control
IC2
Regulator
14V
→
5V
IC3
Regulator
14V
→
8V
IC4
Band data decoder
Serial to parallel conversion
Q1
Pre-drive amplifier
HF band wide band amplification
Q2,3
Drive amplifier
HF band push-pull wide band
amplification
Q4
Final bias supply
Final temperature compensation
Q5,6
Final amplifier
HF band push-pull wide band
amplification
Q7
Relay drive
The relay is energized when
power is turned on
Q8
Switching transistor
On when over voltage occurs
Q9,10
Fan motor drive
Runs the fan during transmission
or when the temperature rises
Q12
Switching transistor
Off when the control circuit is
troubled
Q13
Signal switch
Transmit/Receive changeover relay drive
Q14~21
Signal switch
Low pass filter changeover relay drive
D1
Temperature
Pre-drive temperature detection
compensation
D2
Temperature
Drive temperature detection
compensation
D3,4
Temperature
Final temperature detection
compensation
D5
Protection diode
Reverse power connection
D6
Zener diode
Over voltage detection
D7
Relay surge
Relay counter voltage bypass
absorption
D8
Protection diode
Fan counter voltage bypass
D9
Switching
OR circuit
D10,11
RF detection
SWR power detection
D12
Relay surge
Transmit/Receive changeover relay
absorption
D13
Spike surge
Surge absorber
absorption
D14
Switching
OR circuit
D15
Surge voltage
14V line
absorption
Ref. No.
Use / Function
Operation / Condition
D701~706
Relay surge
LPF relay counter voltage bypass
absorption
CONTROL UNIT (X53-3570-21)
Ref. No.
Use / Function
Operation / Condition
IC1,2
Inverter
Encoder shape wave
IC3
Reset
IC4
Regulator
Constant voltage 6V output
IC5
CPU
Microprocessor
IC6
EEPROM
4k bits
IC7
I/O port
8 bit x 3, 24 ports
IC8
Buffer
Buffer of serial interface
Q1,2
Signal switch
Backup judgment
Q3,4
Signal switch
On during AT tune
Q5,6
Signal switch
On during AT through
Q7
Signal switch
Off in AF mute
D1
Switching (reverse
CPU power supply OR circuit
flow prevention)
D2
Reverse flow
prevention
D3
Switching
Standby switch OR circuit
D4
Zener diode
Backup detection (voltage shift)
D5,6
Reverse flow
prevention
D7,10~13
Switching
Destination selection
D14
Zener diode
AF mute detection (voltage shift)
D15
Switching
Destination selection
D16~18
Reverse flow
Key matrix judgment
prevention
TX-RX UNIT (X57-4660-21)
Ref. No.
Use / Function
Operation / Condition
IC1
Switching
Analog switch
IC2
Amplifier
S-meter level amplification
IC3
Switching
Analog switch
IC4
Balanced
SSB AM modulation
modulation
IC6
Electrical volume
Summary of Contents for TK-80
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Page 83: ...TK 80 76 INTERCONNECTION DIAGRAM ...
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