Kenwood TK-790 Service Manual

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

17TK-790/(B)/H(B)INSTALLATIONFig. 4-1 Knob insertionFig. 4-2 Knob removal3. Optional Voice Scrambler FunctionThe optional voice scrambler function can be used by twomethods.1. Assign this function to the OPT key by using the pro-gramming software (KPG-44D).When the OPT key is pressed, the OPT indicator comeson, and the optional (scrambler) function is enabled.When the key is pressed again, the OPT indicator goesoff and the function is disabled.2. Assign the optional scrambler function to each channelby using the programming software (KPG-44D). The op-tional scrambler function can be used without pressingthe OPT key.3-1. Code settingThe code can be set by two methods.1. Hold down the OPT key to enter the code setting mode.Codes 1 to 16 will be displayed. Set a code by turning the[Up/Down] knob. When the OPT key is pressed again,the code setting mode terminates.2. Set a code for each channel by using the programmingsoftware (KPG-44D).CN508 Voicescrambler114MCI (MIC signal input)MCO (MIC signal output)DEI (Detection signal input)AC (Audio control signal output)BC1 (Scramble code output 1)BC2 (Scramble code output 2)BC3 (Scramble code output 3)BC4 (Scramble code output 4)TXD2RXD2DEO (Detection signal output)PTO (PTT signal output)8C (8V output)E (Earth)Fig. 53-2. Voice scrambler board connection• Modification1. Remove the upper half of the case of the TK-790.2. Remove R515 and R604 on the control unit (X57-561 B/3) (Refer to page 21).• ConnectionThe functions of pins of CN508 on the control unit (X57-561 B/3) are shown in the figure.Join the CN508 connector to the voice scrambler boardvia the E37-0808-05 connector cable.CN507 ANI board1101411SQ (Squelch signal output)EMG (Emergency signal output)EPT (External PTT signal input)I/O (Auxiliary input/output)SEL (Non connection)AS2 (Audio mute input)MCM (MIC mute input)TON (Side tone input)TCN (Speaker mute input)DTI (Data input)E (Earth)8C (Common 8V output)PTO (PTT signal output)DEO (Detection signal output)CN508Fig. 64. Optional ANI Function• ConnectionJoin the CN507 connector to the ANI board via the E37-0809-05 connector cable, and the CN508 connector to theANI board via the E37-0808-05 connector cable.