Kenwood TK-785 Service Manual

Also see for TK-785: Instruction manual

12TK-785 INSTALLATION7. Fitting the Control Panel Upside DownThe TK-785 control panel can be fitted upside down, sothe transceiver can be mounted with its internal speaker (inthe upper half of the case) facing down in your car.1. Remove the control panel and the TX-RX unit (B/2) con-trol section. (Fig. 12)Fig. 12TX-RX UNIT(A/2)KCT-19CN7PAR109ANT• Public addressThe signal from pin 13 of IC7 on the TX-RX unit drives PArelay in the KAP-1 and switches the audio power amplifieroutput between the external PA system (through KCT-19)and internal and external speakers.To use the PA function, R109 on the TX-RX unit must beremoved.R109Use the PA function NoDo not use the PA function YesFig. 11R1Fig. 10 KAP-1 foil side view6-2. Modifying the Transceiver• Horn alertThe signal from pin 4 of IC7 on the TX-RX unit turns Q4and Q6 on and off and drives KAP-1 HA relay to drive thehorn with a maximum of 2A.The default output is HR1. The relay open output can beobtained between HR1 and HR2 by removing R1 in the KAP-1.R1 Output formHR1 (Default) EnableHR2 DisableHR1HR1HR2