Kenwood TK-780 Service Manual
Also see for TK-780 series: Programming instructionsInstruction manualService manual supplementInstruction manualService manual
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Contents
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78TK-780 TERMINAL FUNCTIONCN7 (TX-RX Unit A/2) ←→ CN502 (TX-RX Unit B/2)Pin No. Name Function1 W/N Wide/Narrow. H : Wide2 T/R TX/RX switch. H : Receive3 MO Modulation signal.4 TO Low speed data signal.5 BEEP Beep.6 8R NC7 PSW Power switch.8 DEO Receive signal to control unit.9 MM MIC mute. H : MIC mute10 AFO Receive signal from control unit.11 ME MIC ground.12 MI External MIC.13 AHK Hook signal. H : Off hook14 IGN Ignition signal.15 SB 13.2V.16 SB 13.2V.17 8C 8V.18 KEY TX signal.19 CK Shift register clock.20 DT PLL/Shift register/DA converter data.21 RSSI RSSI.22 LD PLL unlock detection.23 ES Shift register enable.24 EP PLL enable.25 EN DA converter enable.26 APTT External PTT.27 CP PLL clock.28 DTC Data control.29 TXD Serial data.30 RXD Serial data.31 OE Serial data.32 FSW Foot switch.33 E Ground.CN101 (VCO) ←→ TX-RX Unit A/2Pin No. Name Function1 ST Switched transmit input. H : Transmit2 HT RF output.3 E Ground.4 9CL 9V input.5 8CL 8V input.6 MD Modulation input.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 key backlight control.2 PSB 13.2V.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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