Kenwood TK-790 Service Manual

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

74TK-790/(B)/H(B)Connector Terminal Terminal I/O Terminal FunctionNo. No. NameCN1 1 DO I Transmission drive input.To Coaxial connector.TX-RXunitCN2 1 RA O Receiver signal output.To Coaxial connector.TX-RXunitCN3 1 +B I Power supply input (13.4V±15%).CN4 1 E – Earth.W4 1 E – Earth.To 2 +B O Power supply output (13.4V±15%).Control 3 +B O Power supply output (13.4V±15%).unitW5 1 DB O Transmission drive controlTo voltage output (APC).TX-RX 2 E – Earth.unit 3 8R I 8V input during reception.4 8T I 8V input during transmission.5 PC I TX power control signal input.CN104 1 RA I Receiver signal input.To Coaxial connector.FinalunitCN201 1 PC O TX power control signal output.To 2 8T O 8V output during transmissioin.Final 3 8R O 8V output during reception.unit 4 E – Earth.5 DB I Tranmission drive control voltageinput (APC).CN202 1 NC – Not used.To 2 UL O Lock detect output for PLL.Control “H” : Lock, “L” : Unlockunit 3 EP I ENABLE input for PLL.4 CP I CLOCK input for PLL.5 MO I Modulation signal input for VCO.6 MB I Modulation and frequency controlsignal input for VCXO.7 SB I Power output after power switch(13.6V or 13.4V± 15%).8 DT I DATA input.9 ES I ENABLE input for shift register.10 CK I CLOCK input for shift register.11 KEY I KEY signal input. “H” : TX12 8C I Common 8V (8V±5%).13 E – Earth.14 DET O Detection signal output.15 SQL O Squelch signal output.16 RSI O RSSI signal output.17 TV I Tuning voltage signal input for RX BPF.18 PC I TX power control signal input.CN203 1 DO O Transmission drive output.To Coaxial connector.FinalunitFINAL UNIT (X45-3560-10) : TK-790H(B)TX-RX UNIT (X57-5610-XX) (A/3)Connector Terminal Terminal I/O Terminal FunctionNo. No. NameW501 1 RS2 O Output for remote speaker.To 2 RS1 O Output for remote speaker.Display 3 SB O Power output after power switchunit (13.6V or 13.4V± 15%).4 IGN I Ignition input.5 PS I Power swith control signal input.6 TRD I/O TX data output/RX data input.7 1/2 O Remote head 1 signal output.8 RST O RESET signal output.9 E – Earth.10 MIC I MIC signal input.11 ME – MIC earth.CN501 1 +B I Power supply input (13.6V or 13.4V± 15%).To 2 +B I Power supply input (13.6V or 13.4V± 15%).Final 3 E – Earth.unitCN502 1 PC O TX power control signal output.To 2 TV O Tuning voltage signal output for RX BPF.TX-RX 3 RSI I RSSI signal input.unit 4 SQL I Squelch signal input.5 DET I Detection signal input.6 E – Earth7 8C O Common 8V (8V±5%).8 KEY O KEY signal output. “H” : TX9 CK O CLOCK output for shift register.10 ES O ENABLE output for shift register.11 DT O DATA output.12 SB O Power output after power switch(13.6V or 13.4V± 15%).13 MB O Modulation and frequency controlsignal output for VCXO.14 MO O Modulation signal output for VCO.15 CP O CLOCK output for PLL.16 EP O ENABLE output for PLL.17 UL I Lock detect input for PLL.“H” : Lock, “L” : Unlock.18 NC – Not used.CN504 1 AFO O RX audio signal output for head 2.To 2 DE3 I/O Detection signal input from Radio 2.Control 3 E – Earthcable 4 EI O ENABLE output for shift register.(Remote 5 CK O CLOCK output for shift register.kit) 6 DT O DATA output for shift register.7 RST I/O RESET signal output for Radio 2.8 5C O Common 5V (5V±5%).9 PSC I/O Power switch control signalinput/output.10 CS O Chip select output for D/A converter.CN505 1 RSI O RSSI signal output.To Acc 2 NC (SB) O Non connection.25 pin 3 AI1 I Auxiliary input 1 (FPU selectable).D-sub 4 RSV1 O Reservedconnector 5 AI2 I Auxiliary input 2 (FPU selectable).6 RSV2 I Reserved.7 AI3 I Auxiliary input 3 (FPU selectable).8 AFO O RX audio signal output.9 AI4 I Auxiliary input 4 (FPU selectable).10 E – Earth.11 AI5 I Auxiliary input 5 (FPU selectable).12 DEO O Detector signal output.13 E – Earth.CONTROL UNIT (X57-5610-XX) (B/3)TERMINAL FUNCTION