Kenwood TK-790 Service Manual

Also see for FleetSync TK-790: Specifications Instruction manual Specifications Instruction manual

75TK-790/(B)/H(B)Connector Terminal Terminal I/O Terminal FunctionNo. No. Name14 AO1 O Auxiliary output 1 (FPU selectale).15 AO2 O Auxiliary output 2 (FPU selectale).16 AO3 O Auxiliary output 3 (FPU selectale).17 TXD2 O Serial data output.18 AO4 O Auxiliary output 4 (FPU selectale).19 RXD2 I Serial data input.20 SQ O Squelch signal output.“H” : Busy, “L” : Not busy21 TXS O TX sense signal output.“H” : TX, “L” : Another22 SPM I Speaker mute signal input.“H” : Mute on23 MCM I MIC mute signal input. “H” : Mute on24 ME – MIC earth.25 MI/DI I Mic/Data signal input 1. (Default : DI)26~30 – – Non connection.CN506 1 IGN I Ignition sense input.To Acc 2 E – Earth.9 pin 3 HR1 O Horn alert signal output 1.connector 4 HR2 O Horn alert signal output 2.5 OS1 O BTL output for external speaker B (PA).6 OS2 O BTL output for external speaker B (PA).7 ES2 O BTL output for external speaker A.8 ES1 O BTL output for external speaker A.9 RS1 I Remote speaker switch.CN507 1 SQ O Squelch signal output.To “H” : Busy, “L” : No signalANI 2 EMG O Emergency signal output.board 3 EPT I External PTT signal input.4 IO I/O Auxiliary input/output.5 SEL – Non connection.6 AS2 I Audio mute input.“HiZ” : No change, “L” : Mute7 MCM I MIC mute input.“HiZ” : No change, “L” : Mute8 TON I Sidetone input.9 TCN I Speaker mute input.“HiZ” : No change, “L” : Unmute10 DTI I Data input.CN508 1 MCI I MIC signal input.To 2 MCO O MIC signal output.voice 3 DEI I Detection signal input.scrambler 4 AC O Audio control signal output.“H” : OPT SW off, “L” : On5 BC1 O Scramble code output.6 BC2 O Scramble code output.7 BC3 O Scramble code output.8 BC4 O Scramble code output.9 TXD2 O TX data output 2.10 RXD2 I RX data input 2.11 DEO O Detection signal output.12 PTO O PTT signal output.13 8C O Common 8V output.14 E – Earth.CN1 1 DO I Transmission drive input.To Coaxial connector.TX-RXunitCN2 1 +B I Power supply input (13.6V± 15%).FINAL UNIT (X57-5610-XX) (C/3) : TK-790/(B)Connector Terminal Terminal I/O Terminal FunctionNo. No. NameCN3 1 RA O Receiver signal output.To Coaxial connector.TX-RXunitW1 1 E – Earth.To 2 +B O Power supply output (13.6V± 15%).Control 3 +B O Power supply output (13.6V± 15%).unitW2 1 DB O Transmission drive controlTo voltage output (APC).TX-RX 2 E – Earthunit 3 8T I 8V input during transmission.4 PC I TX power control signal input.CN1 1 ME – MIC earth.To 2 MIC O MIC signal output.Control 3 E – Earth.unit 4 RST I RESET signal input.5 1/2 I Remote head 1/2 signal input.“L” : Head 1, “H” : Head 26 TRD I/O TX data output/RX data input.7 PS O Power switch control signal output.8 IGN O Ignition sense output.9 SB I Power input after power switch(13.6V or 13.4V± 15%).10 RS1 I Remote speaker input.11 RS2 I Remote speaker input.CN2 1 RS1 O Remote speaker output.To 2 RS2 O Remote speaker output.RemotespeakerCN3 1 IGN I Ignition sense input.To Acc 2 SB O Power output after power switch12 pin (13.6V or 13.4V± 15%).connector 3 E – Earth.4 MIC I MIC signal input.5 ME – MIC earth.6 AI1 I Auxiliary input 1 (FPU selectable).7 AI2 I Auxiliary input 2 (FPU selectable).8 AO1 O Auxiliary output 1 (FPU selectable).9 AO2 O Auxiliary output 2 (FPU selectable).J1 1 SB O Power output after power switch(MIC (13.6V or 13.4V± 15%)jack) 2 HK I Hook signal input.“L” : On hook, “H” : Off hook3 ME – MIC eearth.4 MIC I MIC signal input.5 E – Earth.6 TRD I/O TX data output/RX data input.7 NC – Not used.8 DM I/O Serial data input/output for keypad MIC.9 BLC O MIC backlight control signal output.“H” : On, “L” : Off10 PTT I PTT signal input.“L” : TX, “OPEN” : RX11 NC – Not used.12 NC – Not used.DISPLAY UNIT (X54-3190-20) : KCH-10(X54-3200-20) : KCH-11TERMINAL FUNCTION