7TK-885INSTALLATION1-2. KCT-19 Accessory Port FunctionNo. (A) No. (B,C,D,E) Name Function Note1 D-2 AHK No function.2 D-5 ME Microphone ground. *1AM Speaker audio mute input.3 D-3 IGN Ignition sense input.4 D-1 DEO Receiver detector output.5 D-6 MI External microphone input. *1TXS Transmitter sense output.6 B-2 E Ground.7 B-3 SB Switched B+, DC 13.6V output.Maximum 0.75A8 D-7 PTT No function.9 D-4 DI Data modulation input.10 B-1 HOR Horn alert/call output.11 D-8 SQ No function.12 C-1 SP Speaker audio output.13 E-1 CN2 LOK No function. *1and *2CN4CN2 AM Speaker mute input.14 E-2 CN4 RXD Serial control data input. *2CN2 MM MIC mute input, active high.15 E-3 CN4 TXD Serial control data output. *2CN2 DTC No function.*1 LOK No function.TXS No function.FSW Foot switch input, active lowNote*1 : The functions of A-2, A-5, A-13 (when connector E is connectedto CN2), and A-15 (when connector E is connected to CN2) arechanged as described in the jumper chart.*2 : The functions of A-13, A-14 and A-15 are changed if the con-nector E is connected to CN2 or CN4 of the radio.No. CN2 CN4E-1 LOK/AM LOKE-2 MM RXDE-3 LOK/DTC/TXS/FSW TXD· Connect CN6 of the radio to connector C of the KCT-19 instead ofto the internal speaker connector, if use external speaker.1-3. Data Equipment ConnectionThe jumpers must be set to either one for each function.Otherwise, the radio will not work properly.ME/AMR12 (0Ω) R167 (0Ω) Function / DefaultYes No AM DefaultNo Yes MEMI/TXSR94 (0Ω) R24 (0Ω) Function / DefaultYes No TXS DefaultNo Yes MILOK/AMR5 (0Ω) R6 (0Ω) Function / DefaultYes No AMNo Yes LOK DefaultDTC/LOK/TXS/FSWR168 R84 R51 R13 Function / Default(0Ω) (0Ω) (0Ω) (0Ω)No No No Yes LOKYes No No No DTC DefaultNo No Yes No TXSNo Yes No No FSWNote : The following parts are not installed at the time ofshipping; R5,R13,R24,R51,R84,R167R51 R13R12R167R24R94R168R6R5R84TX-RX unit (A/2)Component side viewTX-RX unit (A/2)Foil side viewFig. 3