Kenwood TK-940 service manual

Contents $@$, ~\, !? .- $LU~CO .i@&4170-XX FX-R%~?ONIT1x57-4590-XXI BIZTesting GeneralDC Power and wiring Installation Planning Control Stations 5-1. Antenna systemAntenna RadioSystem SET-UP Operating Features Front Panel Displays and Indicators System display Scan indicatorDelete 1 indicator Busy indicatorDetails of Features Time-Out Timer TEL ID Codes TEL ModeSystemIGroup Revert Last call revertFree System Ringback System SearchTranspond Preferred System RevertDelay tone Auto TELAudible User Feedback Tones Proceed toneTransmit disable receive-only channels Call indicator, alert toneConventional System Operation Talk-aroundHorn Alert Non-continuousContinuous System Scan Type Fix system scanData Program Mode Transceiver ProgrammingIr 4-1.lntroduction KPG-4 Description Optional PC programming interface cableClone Mode Figure Dealer modeDescription of Each Modes System keyPanel Tuning Mode Volume keyGroup key Scan keyInstalling the Signaling Unit KDD-4 Dtmf Option KDD-4assemblyInstallation Installing the KDD-4 in the transceiverAccessory Connection Cable KCT-19 Option Jumper setup chartsMonireset ON-HOOK OFF-HOOK JU2 JU3 JUJ Mute UrimuteTerminal function GNDConnecting the KCT-18 to the transceiver R5 and R6 setup chartIgnition Sense Cable KCT-18 Option Modifying the transceiverConnection procedure External SpeakerKES-3 Option KES-4 OptionFitting the Control Panel Upside Down Page Page Page Page RF unit If unitMCF ANT AMP If System -AMPSP PLL MIC AMPAudio amplifier unit Squelch circuit Microphone amplifier PLL Buff IRF AMPVcxo DET InvswControl unit PLL data output Power supply circuitHorn control LCD Assembly Power switch circuitCPU Tone generatorBlock diagram Terminal connection diagramTerminal connection diagram Terminal function Eeprom AT24C02NlOS12.7 TX-RX Unit IC201Test DEC DINMicroprocessor 78312AGF3563BE TX-RX Unit IC209 Microprocessor 75308BGK740BE9 LCD Assy IC2 Output a CLKTEST2 TEST1 NJM78L05UA EepromDTA114EU--DC DTA114YULCD Assy B38-0731-05 Cc4riq Rating wattageTK-940/941 KusaTapttte Screw A T Head T a P T T I E Sciiewpannel Screw SET Insulating Tube ANT Cable Speaker 16 QHM 1W MicrqphqnbY4U Icpqwer Modulej .. Drive TX-RXW w w W W 1 W l I P C X E D C UuupiU U P F U P FR c Hesbnatuh ES $j Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Pattern Page Foil side IC20E Dtci 14EU DTCI44EU Page Page Component side PC Board View ~ o h ~ o n esident Page TX-RX Unit TX-RX Section X57 4590 XX A/2 11 TK A1 PLL O w m o d +4- aLIE- - aIz23z= Page Ccrl--------ASSYDISPLAY S~ECTION838 Eqqzj