Kenwood TK-780 Service Manual Supplement

Also see for TK-780 series: Programming instructions Instruction manual Service manual Instruction manual Service manual

82TK-780/H TERMINAL FUNCTIONCN7 (TX-RX Unit A/2) ←→ CN502 (TX-RX Unit B/2)Pin No. Name Function1 W/N Wide/Narrow switch input. H : Wide2 T/R TX/RX switch input. H : Receive3 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 mute10 AFO Receive signal input.11 ME MIC ground.12 MI Internal MIC output.13 AHK Hook signal output. H : Off hook14 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 data30 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 Function1 ST Switched transmit input. H : Transmit2 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 Function1 E Ground.2 5C Logic power (5V).3 CS Chip selector signal. L : Option4 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 Function1 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 detection8 CM MIC data detection.

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