Kenwood TK-940 service manual

Contents FX-R%~?ONIT1x57-4590-XXI BIZ $@$, ~\, !? .- $LU~CO .i@&4170-XXGeneral TestingRadio DC Power and wiringInstallation Planning Control Stations 5-1. Antenna system AntennaSystem SET-UP Operating Features Busy indicator Front Panel Displays and Indicators System displayScan indicator Delete 1 indicatorDetails of Features Last call revert Time-Out TimerTEL ID Codes TEL Mode SystemIGroup RevertPreferred System Revert Free System RingbackSystem Search TranspondProceed tone Delay toneAuto TEL Audible User Feedback TonesTalk-around Transmit disable receive-only channelsCall indicator, alert tone Conventional System OperationSystem Scan Type Fix system scan Horn AlertNon-continuous ContinuousKPG-4 Description Optional PC programming interface cable Data Program ModeTransceiver Programming Ir 4-1.lntroductionSystem key Clone Mode FigureDealer mode Description of Each ModesScan key Panel Tuning ModeVolume key Group keyKDD-4assembly Installing the Signaling Unit KDD-4 Dtmf OptionInstalling the KDD-4 in the transceiver InstallationJU3 JUJ Mute Urimute Accessory Connection Cable KCT-19 OptionJumper setup charts Monireset ON-HOOK OFF-HOOK JU2GND Terminal functionModifying the transceiver Connecting the KCT-18 to the transceiverR5 and R6 setup chart Ignition Sense Cable KCT-18 OptionKES-4 Option Connection procedureExternal Speaker KES-3 OptionFitting the Control Panel Upside Down Page Page Page Page PLL MIC AMP RF unitIf unit MCF ANT AMP If System -AMPSPAudio amplifier unit Squelch circuit Microphone amplifier DET Invsw PLLBuff IRF AMP VcxoControl unit PLL data output Power supply circuitHorn control Tone generator LCD AssemblyPower switch circuit CPUTerminal connection diagram Block diagramDEC DIN Terminal connection diagram Terminal functionEeprom AT24C02NlOS12.7 TX-RX Unit IC201 TestMicroprocessor 78312AGF3563BE TX-RX Unit IC209 Microprocessor 75308BGK740BE9 LCD Assy IC2 Output a CLKTEST2 TEST1 DTA114YU NJM78L05UAEeprom DTA114EU--DCLCD Assy B38-0731-05 Rating wattage Cc4riqKusa TK-940/941Icpqwer Modulej .. Drive TX-RX Tapttte Screw A T Head T a P T T I E Sciiewpannel Screw SETInsulating Tube ANT Cable Speaker 16 QHM 1W Micrqphqnb Y4UW w w W W 1 W l U P F I P C X E D CUuupi U 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