Kenwood TK-780 series, Service Manual Supplement

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82
TK-780/H
TERMINAL FUNCTION
CN7 (TX-RX Unit A/2)
←→
CN502 (TX-RX Unit B/2)
Pin No. Name Function
1 W/N Wide/Narrow switch input. H : Wide
2 T/R TX/RX switch input. H : Receive
3 MO Modulation signal input.
4 TO Low speed data signal input.
5 BEEP Beep input.
6 8R NC (8V)
7 PSW Power switch.
8 DEO Receive signal output.
9 MM MIC mute. H : MIC mute
10 AFO Receive signal input.
11 ME MIC ground.
12 MI Internal MIC output.
13 AHK Hook signal output. H : Off hook
14 IGN Ignition output.
15 SB 13.6V output.
16 SB 13.6V output.
17 8C 8V output.
18 KEY TX/Lock detection input.
19 CK Shift register clock input.
20 DT PLL/Shift register/DA converter input.
21 RSSI RSSI signal output.
22 LD PLL unlock detection output.
23 ES Shift register enable input.
24 EP PLL enable signal input.
25 EN DA converter enable signal input.
26 APTT PTT signal output.
27 CP PLL clock.
28 DTC Data control signal output.
29 TXD Serial data
30 RXD Serial data.
31 OE Serial data.
32 FSW Foot switch output.
33 E Ground.
CN101 (VCO)
←→
TX-RX Unit (A/2)
Pin No. Name Function
1 ST Switched transmit input. H : Transmit
2 HT Signal output.
3 E Ground.
4 9CL 9V input.
5 8CL 8V input.
6 MD Modulation output.
7 CV Control voltage input.
CN501 (TX-RX Unit B/2)
Pin No. Name Function
1 E Ground.
2 5C Logic power (5V).
3 CS Chip selector signal. L : Option
4 CK Serial clock signal.
5 SID Serial data input.
6 (NC) Unused terminal.
7 (NC) Unused terminal.
8 LED(A) LED anode terminal.
9 LED(K) LED cathode terminal.
10 NC Unused terminal.
J501 (TX-RX Unit B/2)
Pin No. Name Function
1 BLC MIC backlight control.
2 PSB 13.6V.
3 E Ground.
4 PTT/TXD PTT.
5 ME MIC ground.
6 MIC MIC signal input.
7 HOOK/RXD Hook detection
8 CM MIC data detection.