Kenwood TK-80 Service Manual page 57

TK-80
CN No. Pin No. Pin Name
CN1 21 MU
22 SS
23 VSQL
24 VCL
25 VAF
26 DGND
CN2 1 DGND
2 FSL
3 FSD
4 5A
5 DGND
6 STD
7 Q4
8 Q3
9 Q2
10 Q1
11 TOE
12 DGND
CN3 1 TT
2 TS
3 FEN4
4 UCK
5 UDA
6 DGND
7 THP
8 BOVR
9 PSC
10 5A
11 14V
12 14S
13 8A
14 GND
15 NC
16 NC
CN4 1 DGND
2 RTS
3 CTS
4 RXD
5 TXD
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TERMINAL FUNCTION
Function
Microphone UP switch
Standby switch
Squelch volume voltage
Clarifier volume voltage
AF volume voltage
Digital GND
Digital GND
Selective call signal detector
Selective call data
5V
Digital GND
Single tone detector
DTMF decode data
DTMF decode data
DTMF decode data
DTMF decode data
DTMF decoder control
Digital GND
Antenna tuner control
Antenna tuner control
Shift register 4 enable
Shift register control clock
Shift register control data
Digital GND
Thermal protection.
High when it operates
Low: DC over voltage
(approx. 19V or more)
High when power switch is turned
5V
14V
14V (switched)
8V
GND
No connection
No connection
Digital GND
PC I/F (request to send)
PC I/F (clear to send)
PC I/F (RX data)
PC I/F (TX data)
manuals search engine
CN No. Pin No. Pin Name
CN4 6 AMUT Audio mute
7 VAF AF volume voltage
8 SIDE Sidetone
9 BZ Beep
10 BSY Busy signal
11 CKY Keying control
12 RXC Receive control
13 TXC Transmit control
14 SM Signal meter voltage
15 VSFM Forward wave voltage
16 VSRM Reflected wave voltage
17 FEN3 Shift register 3 enable
18 FEN2 Shift register 2 enable
19 VEN1 Electronic volume control enable
20 UCK Shift register, electronic volume
control clock
21 UDA Shift register, electronic volume
control data
22 FEN1 Shift register 1 enable
23 KYS Key jack input. High when jack is inserted
24 KEY CW keying. High: Key down
25 SS Standby switch
26 GND GND
CN5 1 GND GND
2 ABSL DDS2 register selection
3 DEN2 DDS2 enable
4 CASL DDS1 & PLL register selection
5 DEN1 DDS1 enable
6 NC No connection
7 PLS Keying line switch
8 PEN1 PLL enable
9 PDA PLL data
10 PCK PLL clock
11 ULK Unlock detection signal. Low: Unlock
12 VB3 VCO3 selection signal
13 VB2 VCO2 selection signal
14 VB1 VCO1 selection signal
15 VDLY Delay volume voltage
16 GND GND
CN6 1 DGND Digital GND
2 DGND Digital GND
Function