Kenwood TK-940 service manual

Contents $@$, ~\, !? .- $LU~CO .i@&4170-XX FX-R%~?ONIT1x57-4590-XXI BIZTesting GeneralAntenna DC Power and wiringInstallation Planning Control Stations 5-1. Antenna system RadioSystem SET-UP Operating Features Delete 1 indicator Front Panel Displays and Indicators System displayScan indicator Busy indicatorDetails of Features SystemIGroup Revert Time-Out TimerTEL ID Codes TEL Mode Last call revertTranspond Free System RingbackSystem Search Preferred System RevertAudible User Feedback Tones Delay toneAuto TEL Proceed toneConventional System Operation Transmit disable receive-only channelsCall indicator, alert tone Talk-aroundContinuous Horn AlertNon-continuous System Scan Type Fix system scanIr 4-1.lntroduction Data Program ModeTransceiver Programming KPG-4 Description Optional PC programming interface cableDescription of Each Modes Clone Mode FigureDealer mode System keyGroup key Panel Tuning ModeVolume key Scan keyInstalling the Signaling Unit KDD-4 Dtmf Option KDD-4assemblyInstallation Installing the KDD-4 in the transceiverMonireset ON-HOOK OFF-HOOK JU2 Accessory Connection Cable KCT-19 OptionJumper setup charts JU3 JUJ Mute UrimuteTerminal function GNDIgnition Sense Cable KCT-18 Option Connecting the KCT-18 to the transceiverR5 and R6 setup chart Modifying the transceiverKES-3 Option Connection procedureExternal Speaker KES-4 OptionFitting the Control Panel Upside Down Page Page Page Page MCF ANT AMP If System -AMPSP RF unitIf unit PLL MIC AMPAudio amplifier unit Squelch circuit Microphone amplifier Vcxo PLLBuff IRF AMP DET InvswControl unit Horn control Power supply circuitPLL data output CPU LCD AssemblyPower switch circuit Tone generatorBlock diagram Terminal connection diagramTest Terminal connection diagram Terminal functionEeprom AT24C02NlOS12.7 TX-RX Unit IC201 DEC DINMicroprocessor 78312AGF3563BE TX-RX Unit IC209 Microprocessor 75308BGK740BE9 LCD Assy IC2 TEST2 TEST1 CLKOutput a DTA114EU--DC NJM78L05UAEeprom DTA114YULCD Assy B38-0731-05 Cc4riq Rating wattageTK-940/941 KusaY4U Tapttte Screw A T Head T a P T T I E Sciiewpannel Screw SETInsulating Tube ANT Cable Speaker 16 QHM 1W Micrqphqnb Icpqwer Modulej .. Drive TX-RXW w w W W 1 W l U U P F I P C X E D CUuupi 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