TO 31R4-2GRA6-31TM 11-5820-489-10NSN 5820-00-644-4554TM11-5820-489-10TO31R4-2GRA6-31HIGHVOLTAGEisusedintheoperationofthisequipment.DEATHONCONTACTmay occur if person operating this equipment failsto obey safety precautions.DonotbemisleadbyTheTermLOWVOLTAGE.Voltageaslowas90 volts may cause DEATH under certain conditions.TRICHLOROTRIFLUOROETHANEAdequat event i l at i onshoul dbepr ovi dedw hi l eusi ngTRI CHLOROTRI FLUOROETHANE.Pr ol ongedbr eat hi ngof vapor shoul dbeavoi ded.Thesol -vent shoul dnot beusednear heat or openf l ame;t hepr oduc t sof dec omposi t i onar et ox i c andi r -r i t at i ng. Si nc eTRI CHLOROTRI FLUOROETHANEdi ssol vesnat ur al oi l s,pr ol ongedc ont ac t w i t hsk i nshoul dbeavoi ded.Whennec essar y,usegl ovesw hi c ht hesol vent c annot penet r at e.I f t hesol vent i st ak eni nt er nal l y,c onsul t aphysi c i ani mmedi at el y.A/ ( BBLANKTECHNICALMANUALNO.11-5820-489-10TECHNICALORDERTO31R4-2GRA6-31DEPARTMENTSOFTHEARMYAND THE AIR FORCEWashington,DC,23November1983OPERATORSMANUALCONTROLGROUPAN/GRA-6(NSN5820-00-644-4554)REPORTI NGERRORSANDRECOMMENDI NGI MPROVEMENTSYoucanhelpimprovethismanual.Ifyoufindanymistakesorifyouknowofawaytoimprovetheprocedures,pleaseletusknow.MailyourletterorDAForm2028(RecommendedChangestoPublicationsandBl ankForms), di rect t o: Commander, USArmyCommuni cat i ons-ElectronicsCommandandFortMonmouth,ATTN:DRSEL-ME-MP,FortMonmouth,NewJersey07703.ForAirForce,submitAFTOForm22(TechnicalOrderSystemPublicationImprovementReportandReply)inaccordancewithparagraph6-5,Sec-tionVI,TO00-5-1.ForwarddirecttoprimeALC/MST.Ineithercase,areplywillbefurnisheddirecttoyou.HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iiiTABLEOFCONTENTSPAGECHAPTER1SectionIINTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-0General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1MaintenanceForms,RecordsandReports...............1-1ReportingEquipmentImprovementRecommendations (EIR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1NomenclatureCross-ReferenceList....................1-1List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Hand Receipt . . . . . . . . . .. . . . .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2EquipmentDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Purpose,CapabilitiesandFeatures....................1-2Description of Major Components . . . . . . . . . . . . . . . . . . . . . . 1-3DifferencesBetweenModels . . . . . . . .. . . . . . . . . . . . . . .... 1-6PerformanceData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6I IIll*ThismanualsupersedessomuchofTM11-5038,18April1951,includingallTechnicalPrinciplesofOperation......................1-8ArrangementofLocalControltoRemoteControl . . . . . . .. 1-8changesaspertainstooperatormaintenance.iTM11-5820-489-10PAGETo 31R4-2GRA6-31TABLEOFCONTENTS-ContinuedCHAPTER2 OPERATINGINSTRUCTIONS................2 - 02 - 1DescriptionanduseofOperatorsControlsandIndicators. . . . . . . . . . . . .PanelControlsandFacilities.................SectionI2 - 1PreventiveMaintenanceChecksandServices. . . . . . . . . .General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PreventiveMaintenanceChecksandServicesProcedures..............................SectionII2 - 82 - 82 - 8AssemblyandPreparationforUse............InitialAdjustments,DailyChecksandSelf-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OperatingProcedure........................2-132-13SectionIII2-242-27SectionIV OperationUnderUnusualConditionsGeneral . . . . . . . . . . . . . .......... . . . . . . . . . . . . . . . . . . . ..... . . .OperationinArcticClimates.................OperationinTropicalClimates...............OperationinDesertClimates.................2-382-382-382-382-38CHAPER3SectionIMAINTENANCEINSTRUCTIONS.............3 - 0. . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 13 - 1 TroubleshootingInformation.................SectionII MaintenanceProcedures....................Introduction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inspection................................RemovalandReplacement...................Cleaning..................................3 - 13 - 13 - 13 - 33 - 4APPENDIXABREFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .COMPONENTSOFENDITEMANDBASICISSUE ITEMS LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Componentsof End Item . . . . . . . . . . . . . . . . . . . . . . . . .Basic Issue Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ADDITIONAL AUTHORIZATION LIST . . . . . . . . . . . . . . .Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Additional Authorization List . . . . . . . . . . . . . . . . . . . . .EXPENDABLE SUPPLIES AND MATERIALS LIST . . . . . . .Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ExpendableSuppliesandMaterialsList............A-1B-1B-1B-2B-3C-1C-1C-1D-1D-1D-2SectionlIIIlIAPPENDIXCSectionIIIAPPENDIXDSectionlI Ii iiiiGGGGGGGTM11-5820-489-10TO31R4-2GRA6-31HOWTOUSETHISMANUALTHISMANUALTELLSABOUTTHETYPICALARRANGEMENTSOFCONTROLGROUPAN/GRA-6.ALLTHEPROCEDURESINTHISMANUALMUSTBEEXAMINEDBEFOREYOUBEGINANYTASK.THROUGHOUTTHISMANUALCOLORCODEDMARGINTABSWILLGUIDEYOUTOTHESECTIONTHATCONTAINSTHESPECIFICINFORMATIONYOUNEED.THISMANUALISORGANIZEDINTOCHAPTERS,SECTIONS,PARAGRAPHSANDILLUSTRATIONS,WHICHARENUMBEREDTOHELPYOUFINDINFORMATIONABOUTYOUREQUIPMENTQUICKLYANDEASILY.COLORISUSEDTOEMPHASIZEKEYPOINTS.UNFAMILIARWORDSWILLBEEXPLAINEDATTHEBEGINNINGOFEACHCHAPTER.THESUBJECTINDEXINTHEBACKOFTHEMANUALWILLHELPYOUFINDINFORMATIONQUICKLY.TM11-5820-489-10TO31R4-2GRA6-31CHAPTER 1INTRODUCTIONAbbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... . . . . . . . . . . . . . . .1-2Arrangement of Local Control to RemoteControl . . . . . . . . . . . . . . . . . . . . . . . 1-8Differences between Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-6Hand Receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-2Maintenance Forms, Records and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1MajorComponents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-3Nomenclature Cross-Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-1Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-6Purpose, Capabilities, and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-2ReportingEquipmentImprovementRecommendations.................1-1Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1-1REMOTECONTROLC-433/GRCBAG CW-189/GRCLOCALCONTROLC-434/GRC1-0TM11-5820-489-10CHAPTER 1 TO31R4-2GRA6-31INTRODUCTIONSection I. GENERAL INFORMATION1-1.SCOPEThismanualdescribesControlGroupAN/GRA-6.ThemanualcoverstheoperationandOperatorsmaintenanceprocedures.1-2.MAINTENANCEFORMSANDRECORDSDepartmentoftheArmyformsandproceduresusedforequipmentmaintenancewillbethoseprescribedbyTM38-750,TheArmyMaintenanceManagementSystem(TAMMS).1-3.REPORTINGEQUIPMENTIMPROVEMENTRECOMMENDATIONS(EIR)a.Army.IfyourAN/GRA-6needsimprovement,letusknow.SendusanEIR.You,theuseraretheonlyonewhocantelluswhatyoudontlikeaboutyourequip-ment.Letusknowwhyyoudontlikethedesign.PutitonanSF368(QualityDefi-ciencyReport).MailittoCommander,USArmyCommunications-ElectronicsCom-mandandFortMonmouth,ATTN:DRSEL-ME-MP,FortMonmouth,NewJersey07703.Wellsendyouareply.b.AirForce.AirForcepersonnelareencouragedtosubmitElRsinaccordancewithAFR900-4.1-4.NOMENCLATURECROSS-REFERENCELISTCommonnameswillbeusedwhenthemajorcomponentsoftheControlGrouparementionedinthismanual.COMMONNAMEControl Group . . . . . . . . . . . . . . . . . . . . . .Local Control . . . . . . . . . . . . . . . . . . . . . .Remote Control . . . . . . . . . . . . . . . . . . . .Handset . . . . . . . . . . . . . . . . . . . . . . . . . . .Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mounting . . . . . . . . . . . . . . . . . . . . . . . . . .InterconnectingBox................Loudspeaker . . . . . . . . . . . . . . . . . . . . . . .Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . .Container . . . . . . . . . . . . . . . . . . . . . . . . . .Generator . . . . . . . . . . . . . . . . . . . . . . . . .Multimeter. . . . . . . . . . . . . . . . . . . . . . . . .NOMENCLATUREControlGroupAN/GRA-6LocalControlC-434/GRCRemote Control C-433/GRCHandsetH-33/PTBagCW-189/GRCWireWD-1/TTMountingMT-297/GRorMountingMT-298/GRInterconnectingBoxJ-654/GLoudspeaker, Dynamic LS-166/UBattery, Dry BA-30 orBattery,DryBA-414/UContainerforInterconnectingB0XJ-654/GGeneratorG-25/PTMultimeterAN/URM-1051-1TM11-5820-489-10TO31R4-2GRA6-31NOTENomenclatureMUSTbeusedwhenfillingoutreportformsorlookingupTechnicalManuals. 1-5. LIST OF ABBREVIATIONSAbbreviations are spelled out the first time they appear in thisplete list of abbreviations used in this manual is given below.manual. A com-AAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . AdditionalAuthorizationListac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . alternatingcurrentBII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic lssue ltemsCOEI . . . . . . . . . . . . . . . . . . . . . . . . . . . ComponentsofEndItemdc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . direct currentFSCM . . . . . . . . . . . . . . . . . . . . . . . . . . . FederalSupplyCodeofManufacturerHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hertzo/a.................OverallPMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . PreventiveMaintenanceChecksandServicesrpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . revolutions per minuteu/m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . unit of measure1-6. HAND RECEIPTThismanualhasacompaniondocumentwithaTMnumberfollowedby-HR(which stands for Hand Receipt). TM 11-5820-489-10-HR consists of preprinted handreceipts (DA Form 2062) that list end item related equipment (i.e., COEI, Bll, andAAL)youmustaccountfor.Asanaidtopropertyaccountability,additional-HRmanualsmayberequisitionedfromTheUSArmyAdjutantGeneralPublicationsCenter,Baltimore,MD,inaccordancewiththeproceduresinChapter3,AR310-2,andDAPAM310-10-2.SectionIl.EQUIPMENTDESCRIPTION1-7. PURPOSE, CAPABILITIES AND FEATURESGGGGGGGGG1-2Used to control and operate a radio setFor listening and talking, can use one or two receiver-transmitters,amplifiers or similar push-to-talk types of equipmentTransmissionrangeabout2miles(300to4000Hzfrequency)Small,portable,lightweight,fungiproofContinuousdccircuitTwo-waytelephonecommunicationwithringingUses two-wire telephone lineCan be used under bad weather conditionsAuxiliary components:G Push-to-talk type handsetG 1setrunningsparesG InterconnectingBox G largewaterproofcarryingbag1-31-8. DESCRIPTION OF MAJOR COMPONENTSa.ControlGroupAN/GRA-6RemoteControlHandsetsBagCarryingstrapInterconnecting BoxTM11-5820-489-10TO31R4-2GRA6-31Permitslocalselectionoftelephoneopera-tionorpush-to-talkoperation.Permitsfieldtelephoneoperationconnec-tionswithlocalcontroluptoa2milerangeUsedfortransmittingandreceivingvoicesignals.UsedtocontainControlUnits,Handset,andrunningsparepartswhennotinuse.ForuseincarryingRemoteControlUnit.UsedwhenHandsetandLoudspeakerareneededatthesametime.TM11-5820-489-10TO31R4-2GRA6-31b.RemoteControlOuterCaseBatteryCompartmentCover (under case)DringsFrontPanelWaterproof,housespanelandchassis.Providesaccesstoareathatcontainsbat-teries.These hold shoulder strap for carrying posi-tion. In carrying position, operating controlsof front panel face upward.Contains controls and instruments for opera-tion.c.LocalControlFrontPanelChannelorMountingrunnersOuterCaseConnectorContains controls and instruments for opera-tion.Allows Local Control to be mounted for plug-in connection to radio sets using mounting.Waterproof,housespanelandchassis.Plugsintoamatingconnectoronamountingradio set to establish an electricalconnec-tion between Control Unit and radio set (seerearview).1-4TM11-5820-489-10TO31R4-2GRA6-31o5CableCompartmentCoverLatcho6CableAssemblyo7CableCompartmentCovero8CapRetainerChaino9Capo10CapRetainingBracketd.HandsetAmeanstocontrolopeningandclosingofcablecompartmentcover.MeansforestablishingelectricalconnectionsbetweenControlUnitandradiosets.Providesaccesstoareathatcontainscableassembly.Anaidtopreventinglossofcap.Usedfortheprotectionofconnectorplugwhennotinuse.Usedtoholdthecapwhentheconnectorisbeingused.Push-to-talkswitchisusedtoprovidevoicecommunication.Pushswitchtotalkandreleaseswitchtolisten.e.InterconnectingboxPlugConnectorReceptacleConnectorsWhenpluggedintoRemoteControl,providesextraelectricalpowertoextension.NeededwhenLoudspeakerandHandsetareusedatthesametime.1-5TM11-5820-489-10TO31R4-2GRA6-311-9.DIFFERENCESBETWEENMODELSGenerators G-25/PT(usedinthismanual)G-25A/PT(others)rotatesat155rpm. rotatesat208rpm1-10. PERFORMANCE DATAITEMS USED IN AN OPERABLE CONTROL GROUPItemNo. Qty.1 12 13 24 15 16 17 48 11-6PowerComponent RequirementsRemoteControl80to100vac,20HzC-433/GRC single ph battery 3v+ 45v dc.LocalControl 80to100vac,20HzC-434/GRC singlephdcbatterypower,3v.HandsetH-33/PT 300ohmsimpedance,100 Hz, carbon typexmtr40ohmsdcresistance, 60 ma 300 to4000 Hz freq. range.InterconnectingBox J-654/GContainer forInterconnectingBOX J-654/GLoudspeaker, 8ohmsvoicecallDynamicLS-166/U impedance,2W normaland 3W peak inputBattery,dryBA-30 1.5VBattery,dry 45v tapped at 22vBA-414/UTechnicalCharacteristicsmanualcontrol,alumn,7lbs,(3.15kg) 9-3/8 I X :3hX7wmanualcontrol,alumn,10lbs.,(5.6kg)8-9/16IX 10" w X 3 hbatterypowered,blackplastichandle,magneticreceiver1-1/81bs.(.51kg)3/8dia.cableaccom,alumnw/cover,1lb.(.45kg ) 4-5/8 lg X2-1/8 w X 1 h(incl. 3 ft. intercon-nectioncord)2lbs. (.9 kg) X 0.2cuft.5-21/32 l X3-3/16 w X 7-1/32 "h(2 ea. local control)(2ea.remotecontrol)usedwithremotecontrolTM11-5820-489-10TO31R4-2GRA6-31ItemNo.910ITEMSUSEDINANOPERABLECONTROLGROUP-ContinuedQty.Component1 Lamp,glow1 Lamp,glowPowerRequirements1/25w,65v,ac,90vdc1/25w,65v,ac,90vdcTechnicalCharacteristicsneongas,GEtypeNE51(usedwithlocalcontrol)1-1/8ho/aneongasGENE-51(usedwithremotecontrol)1-1/8ho/aNOTEDrybatteriesshownareusedwiththeequipment,butarenotconsideredpartoftheequipment.Theywillnotbepreshippedautomatically,butaretoberequisition-edinquantitiesnecessaryfortheparticularorganiza-tioninaccordancewithSB11-6.1-71-8Section Ill. TECHNICAL PRINCIPLES OF OPERATION1-11. ARRANGEMENT OF LOCAL CONTROL TO REMOTE CONTROLUpto2milesofIiRemoteControlTM11-5820-489-10TO31R4-2GRA6-31CHAPTER2OPERATINGINSTRUCTIONSControls and lndicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Local Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Initial adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Telephone circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Telephone lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Write-in blanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Assembly and Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Local Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Break-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Local push-to-talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote push-to-talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ringing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation - Unusual conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Arctic Climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Desert Climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tropical Climates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12-12-52-242-242-232-252-132-232-172-132-272-342-332-332-312-282-372-382-382-382-382-8( 1- 9bl ank) / 2- 0TM11-5820-489-10TO31R4-2GRA6-31SectionI.DESCRIPTIONANDUSEOFOPERATORSCONTROLSANDINDICATORS2-1.PANELCONTROLSANDFACILITIESa.LocalControlPanelcontrolsandindicators.LocalSwitchPOSITIONofControlorIndicatorsFUNCTIONwhenusedwithLocalControl UnitGAllowspush-to-talkoperationofSet1(usingspringaction).GAllowsTelephoneoperationwithRemoteControl.2-1TM11-5820-489-10TO31R4-2GRA6-31POSITIONRemote Switch2-2FUNCTIONG Allows push-to-talk operation ofSet2(usingspringaction).G AllowsTelephonecommunicationbetweenLocalandRemoteControlUnits.G May also be used to turn powerOFF in TEL ONLY position.G Forpush-to-talkoperationofeitherSet 1 or Set 2 move REMOTE knobtoSet1andSet2setting.LocalControl is now ON.TM11-5820-489-10TO31R4-2GRA6-31POSITIONWireBindingPostsFUNCTIONGProvidesforRemoteControlofpowerforaradiosetandpush-to-talkoperationofSet1.GMonitorsSet1andSet2.GProvidesforRemoteControlofpowerforaradiosetandpush-to-talkoperationofSet2.GMonitorsSet1andSet2.GAllowsconnectionoflinesforremotecontrol.2-3TM11-5820-489-10TO31R4-2GRA6-31NOTETopreventaccidentaloperationoftheradiosettransmitters,theREMOTEswitchofLocalControlMUSTbeintheTELONLYpositionwhenringinggeneratorisoperated.RingingGeneratorPOSITIONFUNCTIONhandleandturningvidesthemeansofycle ringing signalControl Unit.Call LightG Whenlit,showsthataringingsignalis being received from the Remote ControlUnit.G Usingdimmer,calllightcanbeadjustedGGAudio Connectorto desired brightness.Turnclockwisetodim,counterclockwisetobrighten.ConnectionpointforaHandsetorsimilaraccessory for telephone communicationand push-to-talk operation of the radioset.NOTEUseaudiocoverwhennot in operation.2-4TM11-5820-489-10TO31R4-2GRA6-31b. Remote Control Panel controls and indicators.SelectorSwitchPOSITIONofControlorIndicatorsFUNCTIONwhenusedwithLocalControlUnitG ProvidespowerONpositionforaradiosetand/orSet1orSet2dependingonindicatorsettingatLocal Control Unit.Write-inpositions(spaces)foroperatortorecordfunctionsofswitchpositions.G ProvidespowerOFFpositionfora radio set and/or Set 1 or Set 2dependingonindicatorsettingatLocal Control Unit.NOTEThe functions of the write-in positions will be reversed if the telephone lineconnections are reversed at either Local or Control units.2-5TM11-5820-489-10TO31R4-2GRA6-31POSITIONof Control orIndicatorWireBindPostsFUNCTIONwhenusedwithLocalControlUnitG FortelephonecommunicationswithLocal Control Unit.G Allows connection of RemoteControl Unit.NOTETopreventaccidentaloperationoftheradiosettransmitters,theREMOTEswitchofLocalControlMUSTbeintheTELONLYpositionwhenringinggeneratorisoperated.RingingGeneratorGUsing spinner handle and turningclockwise provides the means ofsendinga20-cycleringingsignalto the Local Control Unit.Fold-out handle2-6TM11-5820-489-10TO31R4-2GRA6-31POSITIONFUNCTIONofControlorwhenusedwithLocalControlIndicatorUnitCallLightGAudioConnectorWhenlit,showsthataringingsignalisbeingreceivedattheLocalControlUnit.Usingdimmer,calllightcanbeadjustedtodesiredbrightness.Turnclockwisetodim,counterclockwisetobrighten.GThisiswhereaHandsetorsimilaraccessoryfortelephonecommunica-tionandpush-to-talkoperationoftheradiosetisconnected.GUseaudiocoverwhennotinoperation.2-7TM11-5820-489-10TO31R4-2GRA6-31SectionIl.PREVENTIVEMAINTENANCECHECKSANDSERVICES(PMCS)2-2. GENERALOperatorsPreventiveMaintenanceChecksandServices(PMCS)arethere-quireddailyandweeklyinspectionsandcareofyourequipmentnecessarytokeepitingoodoperatingcondition.Tools and MaterialsNotoolsorequipmentarerequiredforoperatormaintenance.Thefollowingcleaningmaterialswillbeusefultoyou:G Lint-freeclothsG SoftbristlebrushG DishwashingcompoundordetergentG Cleaningcompound2-3. PREVENTIVE MAINTENANCE CHECKS AND SERVICES PROCEDURESNOTEIfyourControlGroupAN/GRA-6mustbeinUSEALLTHETIME,checkandservicethoseitemsthatcanbecheckedandservicedwithoutstoppingitsoperation.MakeCOMPLETEchecksandservicesONLYwhentheControlGroupisfinallySHUTDOWN.2-8TM11-5820-489-10TO31R4-2GRA6-31a.RoutineServicesRoutineservicesarenotlistedinthePMCStable.Theyare,however,importantandshouldbedoneonaroutinebasis.Herearetheroutinestepstobeperformedbyyouasnecessary:GCl eanGGDus tGWashGGCheckforcutorfrayedGcabl esGCheckfordented,bent,orGbrokencomponentsGGChecktoseethatitemsnotinuseareproperlystoredCheckforrustingCheckcontrolsforsmoothoperationCoverunusedreceptaclesCheckforloosenuts,bolts,andconnectorsCheckforcompletenessandcurrentchangestopublicationsb. Explanation of INTERVAL column of PMCS chartNOTEAlwayskeepinmindallCAUTIONSandWARNINGSwhenPMCSareperformed.WEEKLY-DoyourWeekly(W)PMCStoensurethattheControlGroupisfunctioningproperly.2-9TM11-5820-489-10TO31R4-2GRA6-31NOTEALLPMCSmustbedoneasregularlyscheduledandalsounderthefollowingconditions:G BeforetheControlGroupisusedonamission.GWhentheControlGroupisfirstinstalled.G WhentheControlGroupisreinstalledafterbeingremovedforanyreason.G WhenyouareoperatingtheControlGroupforthefirsttime.c.ExplanationofEQUIPMENTISNOTREADY/AVAILABLEIFcolumnofPMCSchart.lThiscolumntellstheconditionsunderwhichtheequipmentcannotperform the assigned mission requirements.NOTETheprocedurescolumninyourPMCScharttellsyouhowtoperformtherequiredchecksandservices.Carefully follow these instructions. If tools are neededorthechartinstructionstellyou,getorganizationalmaintenancetodothenecessarywork.NOTEIfanyportionofyourControlGroupfailstooperate,refertoChapter3underTroubleshootingforpossiblecorrectiveaction.Reportanymalfunctions or failures on the proper DA Form 2404 or refer to TM38-750.2-10TM11-5820-489-10TO31R4-2GRA6-31DAFORM2404,EQUIPMENTINSPECTIONANDMAINTENANCEWORKSHEET.2-112-12TM 11-5820-489-10TO 31R4-2GRA6-31TM11-5820-489-10TO31R4-2GRA6-31SectionIll.OPERATIONUNDERUSUALCONDITIONS2-4.ASSEMBLYANDPREPARATIONFORUSEIfreceivedwithoutbatteries,followtheseprocedures:a.RemoteControlUnitGSe t SELECTOR switchtoTELposition.Becarefulwhenopeningsnapcatches.Avoidinjurytoyourhands!GReleasethetwosnapcatchesandslidetheunitfromthecase.RearView2-13TM11-5820-489-10TO31R4-2GRA6-31GGGGGRemovebatterycoverbyslidingtotherighttoreleasetabs,thenliftoff.Atrear,install2batteries(BA-30)intosmallercompartmentonright.Layfirstbatteryonitssideandslideintocompartmentfloorsotopportion(positiveelectrode)entersfirstandtouchestheflatcontactinside.Slideotherbatteryintosameareaabovefirstbattery,sothattheflatbottom(negativeelectrode)entersfirstandtouchesspringcontact.InsertBattery(BA-414/U)intothelargerspace,sothattheoctalsocket,facesyou.Insertthisendfirst2-14TM11-5820-489-10TO31R4-2GRA6-31GAlinecentersocketkeywayandsocketofthebattery.CAUTIONDonottwist.GReplacebatterycompartmentcoverbyinsertingthetwotabs.Pressandslideuntillatchislockedintoplace.GLocateinsideBell/Lampswitch(ontoptowardfront).Thisisneededtohearringingsignalorlightupcalllight(whicheverapplies).Setswitchtoselectedposition.GReplacecase.Fastenthetwosnapcatches.2-15TM11-5820-489-10TO31R4-2GRA6-31GAttachthecarryingstraptothetwoDringslocatedunderthesnapcatches.GRemovedustcoverifusingInterconnectingTheninsertplugconnectorintofrontpanelAUDIOreceptacle.G PlugHandsetandLoudspeakerintoreceptacleconnectorsforduplexoperaton.(Sendonmicrophone,receiveonspeaker).2-16b.LocalControlUnitG To remove unit from case, turn toloosen both thumbscrew fastenerslocatedontheendsofthefrontpanelandslideunitforward.NOTEItmaybenecessarytoremove the O ring fromthe power cable connectorto remove unit from case.TM11-5820-489-10TO31R4-2GRA6-31G Releasethebatterycompartmentcatch so cover can be removed.Liftcoveroff.2-17TM11-5820-489-10TO31R4-2GRA6-31G Installtwobatteries.Placefirstbatteryintotheright,sothattheflatbottom(negativeelectrode)restsonthespringonthefloorofthecompartment.Placeotherbatteryintotheleft,nexttofirstbattery,sothatthetopportion(positiveelectrode)goesinfirst.G Replacecoversothatcatchmakesconnection.2-18GTurn unit over so battery compartmentis now on the bottom. Locate Bell/Lampswitch. Set the Bell/Lamp switch ineither Bell or Lamp positionaccording to your need.G Replacethecase.Tightenboththumb screw fasteners.TM11-5820-489-10TO31R4-2GRA6-31c.LocalControlConnectionG If the unit is to be installed alongside orneartheradiosetandconnectedtofrontpanel (not mounted), proceed as follows:NOTETurn power OFF on the radio set beforeconnectingtheLocalControlUnit.G Attherear,openthecablecompartmentcoverbypressingthelatchatthetopandlayingcover down. Bring the twocablesout.NOTEPull cables through case before closing case.2-19TM11-5820-489-10TO31R4-2GRA6-31NOTEIftheRadioSetinvolvedintheinstallationhastworeceiver-transmitters,onewillbereferredtoasSet1andtheotherasSet2.RefertotheinstructionbookoftheparticularRadioSettodeterminewhichunitoftheradioset is Set 1 and which is Set 2. Note also that Set 1 and/orSet2maybeareceiver-transmitter,aradioreceiver,aradiotransmitter,aninterphoneamplifier,orsomeotherpush-to-talk(orpush-to-transmit)typeunit.GMountsetfirst.GAttachthecabletobeusedforSet1intotheAUDIOconnectionofRadioSet1byturningclockwise.Forcablechoice,seenoteabove.G IfthereisanotherRadioSet(Set2)tobeconnected,attachtheothercableintotheAUDIOconnectionofRadioSet2byturningclockwise.GIfonlyoneradioisconnected,storeothercableincompartment.Connectorisnotusednow,socoverwithprotectivecap.2-20TM11-5820-489-10TO31R4-2GRA6-31d.LocalControlwithmountingofradiosetwheremountingframehasbeenprovided.NOTETurnpowerOFFontheradiosetbeforeconnectingtheLocalControlUnit.G Removeprotectivecoverplatefromthelargeplug.GOpenthecablecompartmentcoverbypressingthelatchatthetopandturningcoverdown.GPlacecaponcapretainingbracketlocatedonopenedcablecompartmentcover.Closecover.2-21TM11-5820-489-10TO31R4-2GRA6-31GInserttheControlUnitsmountingrunners(locatedonbothsidesofthecase)intothemountingframeoftheradioset.GLockUnitinplockinglever(locatedontherightfrontportionofthemountingframeoftheradioset).GForelectricalconnection,plugmatingconnector(locatedonradiosetmountingframe)intatheconnectoronrearofIocalcontrolunit.2-22WARNINGTM11-5820-489-10TO31R4-2GRA6-31e.InstallationofAccessoriesGHandset-ForLocalorRemoteControl,attachtheConnectorplugoftheHandsetintotheAUDIOconnector(locatedonthefrontpanel).Turnclockwisetolock.WhenHandsetisnotinuse,attachtostorageareabyusinghangupclip.Becareful!Wheneitherunitisinuse,theexistingvoltageatL1andL2maybeashighas90volts.Useextremecaution.G TelephoneLines-Removeabout3/4inchofinsulationfromendsoftwowires,leavingthewiringbare.Pressandholddownbindingpostknobs.InsertendofonewiretobindingpostL1andrelease.ConnecttheotherbarewireendtoL2.ThisisdoneatLocalandRemoteControlUnits.Local Control UnitRemoteControlUnit2-23TM11-5820-489-10TO31R4-2GRA6-312-5. INITIALADJUSTMENTS,DAILYCHECKSANDSELF-TESTNOTEUnlessyouareotherwisenotified,theswitchesontheRemoteandLocalControlUnitsMUSTbekeptintheTELandTELONLYpositions.BesideskeepingtheTelephonelinescontinuouslyopen,thispreventsaccidentaloperationoftheradiosetfromtheRemoteControlarea.a. Check of Telephone CircuitGGBothoperators(LocalandRemote)mustagreeontimechecks.Tocheckringingoperationfromeitherunit,crank(turn)generatorhandle(locatedonfrontpanel)clockwise.AtotherControlUnitbellshouldringorcalllightshouldlightdependingonswitchsetting.Becareful!Wheneitherunitisinuse,theexistingvoltageatL1andL2maybeashighas90volts.Useextremecaution.G With TEL and TEL ONLY settings,checktwo-waytelephonecommunicationusingpush-to-talkswithonhandset.THISISSTANDBYPOSITION.2-24b.Fillinginwrite-inblanksonRemoteControlUnitTM11-5820-489-10TO31R4-2GRA6-31TheRemoteControloperatorwillfillinblankspaceswithproperinfor-mationaccordingtoinstructionsbelow.NOTERemoteControlwrite-inpositionsdependonthepositionsoftheLocalControlswitches.ItmaybenecessarytocallandchecktheLocalUnitforinformation.WhentheHandsetpush-to-talkswitchisoperatedattheRemoteControlUnit,voltagesashighas90voltsdcarepresentatthelinebindingpostsofbothunits.Set1controlusingpush-to-talkonHandsetwhenpoweriscontrolledbyRemoteUnit.G SetREMOTEswitchtoSET1position.G Left-hand(LH)SELECTORwrite-inpositionturnsSET1powerONwhenremoteoperatorpressespush-to-talk.GFillinoninblank.GMiddle(MID)SELECTORwrite-inpositionturnsSET1offwhenpush-to-talkispressedagain.GFillinoffinblank.2-25TM11-5820-489-10TO31R4-2GRA6-31Set2controlusingpush-to-talkonHandsetwhenpoweriscontrolledbyRemote Unit.G SetREMOTEswitchtoSET2position.G LHSELECTORwrite-inpositionturnsSET2powerONwhenremoteoperatorpressespush-to-talk.GGGFillinoninblank.MIDSELECTORwrite-inpositionturnsSET2powerOFFwhenRemoteoperatorpressespush-to-talkagain.Fillinoffinblank.ControlofSET1andSET2whenpoweriscontrolledbyLocalUnit.G SetREMOTEswitchtoSET1andSET2position.GSettoLHwrite-inpositiontogiveSET1power.2-26GGG2-6.TM11-5820-489-10TO31R4-2GRA6-31FillinSET1inblank.TurntoMIDwrite-inpositiontogive SET 2 power.FillinSET2inblank.NOTEThiswrite-insetupistheintendedplan.Ifthelineconnectionsarereversed,thesystembetweentheSELECTORandREMOTEswitchesalsowillbereversed.Togetthisset-up,thenextstepsmustbedone.OPERATINGPROCEDUREa.TelephoneCommunication(withringing)Remoteoperatorbeginsconversationwithotheroperatorbysendingringingsignal.NOTETopreventaccidentaloperationoftheradiosetbyaringingsignal,keeptheREMOTEswitchoflocalcontrolunitintheTELONLYpositionduringstandbyandringingperiods.GSetSELECTORswitchtoTELposition.GCrankringinggeneratorhandle.G OutgoingsignalcanbeheardinHandset of sender.2-27TM11-5820-489-10TO31R4-2GRA6-31Localoperatortalkswithotheroperatorbyringing.GLocalswitchisinTELposition.REMOTEswitchisinTELONLYposition.GCrankringinggeneratorhandleatleast20times.GOut-goingsignalcanbeheardinhandsetofsender.Remotecontroloperatortalkingandlistening.GSetSELECTORswitchtoTELposition.G Press(push-to-talk)switchtotalk.GReleaseswitchtolisten.GWhendone,releasepush-to-talkswitch.LeaveSELECTORinTELposition.2-28Localcontroloperatortalkingandlistening.TM11-5820-489-10TO31R4-2GRA6-31G SetLOCALswitchtoTELpositionandREMOTEswitchtoTELONLYposition.Push-to-talkswitchPress(push-to-talk)switchtotalk.Releaseswitchtolisten.Whendone,releasepush-to-talkswitch.LeaveswitchesinTELandTELONLYpositions.RemoteControlUnitreceivesringingsignal.G SetSELECTORtoTELposition.G Toreceiveringingsignal,setBELL/LAMPswitch(locatedinsideofunit)toBELLposition.GToreceiveringingsignalonCALLLIGHT,setBELL/LAMPswitcht oLAMP.2-29TM11-5820-489-10TO31R4-2GRA6-31GListenforbellorwatchforlightonpanel.Calllightmaybeadjustedtodesiredbrightnessbyusingdimmer.Turnrimoncalllight(dimmer)clockwisetodimandcounterclockwisetobrighten.LocalControlUnitreceivesringingsignal.GGGGSetLOCALswitchtoTELpositionandREMOTEswitchtoTELONLYposition.Toreceiveringingsignal,setBELL/LAMPswitchto BELL.BELL/LAMPswitchToreceiveringingsignalonCALLsetBELL/LAMPswitchtoLAMP.Listenforbellorwatchforlightonpanel.Push-to-talkoperationfromRemoteControlUnit.Remotepush-to-talkoperationofSet1withlocalcontrolofpower.Remoteoperatorwill:GSetSELECTORatleft-handwrite-inposition.2-30TM11-5820-489-10TO31R4-2GRA6-31G Presspush-to-talkswitchtospeak.GReleaseswitchtolisten.G Whendone,releasepush-to-talkswitchandsetSELECTORswitchtoTEL.Localoperatorwill:G SetLOCALswitchtoTEL.G SetREMOTEswitchtoSET1position.G Whendone,setREMOTEswitchtoTELONLY.LeaveLOCALswitchinTEL.Remotepush-to-talkoperationofSET2withLocalControlofradiosetpower.Remoteoperatormust:G SetSELECTORtoMIDwrite-inposition.G Presspush-to-talkswitch.GReleaseswitchtolisten.G Whendone,releasepush-to-talkswitchandsetSELECTORswitchtoTEL.2-31TM11-5820-489-10TO31R4-2GRA6-31Localoperatormust:G SetLOCALswitchtoTELpositionandREMOTEswitchtoSET2position.GWhendone,setREMOTEswitchtoTELONLYpositionandleaveLOCALinTELposition.Remotepush-to-talkoperationLocalControlofradioset.Remoteoperatormust:ofeitherSET1orSET2withG SetSELECTORswitchtoLHpositionforSET 2 power.SET1powerorMIDwrite-inpositionforGTalkorlistentoSETpush-to-talkswitch.1 or SET 2 usingG Whendone,releasepush-to-talkswitch.SetSELECTORswitchtoTELposition.2-32TM11-5820-489-10TO31R4-2GRA6-31Localoperatormust:G SetLOCALswitchtoTELpositionandREMOTEswitchtoSET1and2.G Whendone,setREMOTEswitchtoTELONLYandleaveLOCALswitchin TEL.c.Push-to-TalkfromLocalControlUnitLocalpush-to-talk,releasetolistenoperation.G TransmitpowerisONforeitherSet1orSet2.GControlsSet1orSet2atRemoteControlUnit.d.MonitoringOperationsatLocalControl.GGGAudiooutputsignalsofradiosetcanbeheardbyoperatorofallreceiversorreceivingcircuitsoftheradioset.REMOTEswitchisinanypositionBUTTELONLY.DirecttransmissionmonitoringoftheRemoteoperatorcanonlybeheardwhentheradiosetisequippedwithasidetonecircuit.Sidetonespeechsignalswillbeheardi ntheLocal operator shandset.Tel ephoneandr adi oout putreceptioncanbemonitoredatthesametime,iftheRemoteSELEC-TORswi t chandt heLOCALswi tchareBOTHi ntheTELposition.2-33TM11-5820-489-10TO31R4-2GRA6-31e.MonitoringOperationsatRemoteControlwiththeREMOTEswitchinanyposition,butTELONLY.f.GTheremoteoperatorcanhearout-putofallreceiversoftheradiosetandalsospeechtransmissionfromthelocaloperator.GForal l ki ndsofrecepti onattheRemoteControlUnit,LOCALswitchofLocalControlmustbeintheTELposition.Break-inOperationBreak-inoperationallowstheoperatortoenterintoaconversationbetweentwootheroperators.GGGTwo-wayTelephoneConversationsmakesitimpossibletohearanyofthereceiveroutputsignalsoftheradioset.LocalControloperatorcanbreakthetwo-waytelephonecircuitathisend,byturningLOCALswitchtoSET1orSET2position.Break-inbyLocalControloperatoronRemoteControloperationispossiblewhenRemoteoperatoristalkingoverradiosettodistantradiooperator.TurnLOCALswitchtoTELpositionandpresspush-to-talk.2-34GTM11-5820-489-10TO31R4-2GRA6-31NOTELocaloperatorsmessagewillbetransmittedifpush-to-talkisusedwhileremoteoperatoristalking(watchtiming).Localoperatorcantakecontroloftheradiosetfromtheremoteoperatorbythefollowingmethod:1.Ifspecialinstallationprovidesforpowercontrol,turnradiopowerswitchfromREMOTEpowerONpositiontoLOCALpowerONposition.2.TurnREMOTEswitchtoSET1and2.3.TurnLOCALswitchtoSET1orSET2(whicheverisneeded).4.Presspush-to-talkswitch.Releaseswitchtolisten.2-35TM11-5820-489-10TO31R4-2GRA6-31NOTESincethecircuitsbetweeneachofthetwoControlGroupoperatorsandtheradiosetareofthepush-to-talktype,TIMINGoftheentryofthebreak-inoperationintotheconversationisIMPORTANTImpropertimingcouldresultinunneededinterruptionsorbreak-ins.REMOTEG Break-inbyRemoteControloperatoronLocalControloperationswhenlocaloperatoristalkingoverradiosetwithdistantradiooperatorispossiblewhen:1. REMOTEswitchofLocalControlisintheTELONLYposition.ThenRemoteoperatorsends20cycleringingsignal.NOTEIfRemoteswitchisinanypositionotherthanTELONLY,callforemergencyonly.2.REMOTEswitchofLocalControlisinSET1andSET2position.ThenRemoteoperatorturnsSELECTORtoeitherwrite-inpositiontocontactSET1orSET2.Clickthepush-to-talkswitchtosignalLocalControlUnit.GBusyCircuitisshownwhenRemoteoperatorhearslocaloperatorscon-versation.2-36g.StoppingProceduresTM11-5820-489-10TO 31R4-2GRA6-31GTurnradiosetpowerOFFaccordingtoradiosetinstructions.GATRemoteControlUnit,turnSELECTORswitchtoMIDwrite-inposition.GRestoretostand-byconditionasfollows.GTodisconnectControlGroupfromradioset:1.Turnradiosetpowerswitchto OFF.2.Disconnectthelines.3.DisconnectAudio,accessories,4.RemoveLocalControlUnitfrom5.Removethecables.radiosetorGWhentemporarilynotinuse,storecomponentsofControlGroupinBag.CAUTIONIftheControl Groupwi l lperiodoftime,REMOVEthetheUnits.notbeusedforal ongBATTERIESbeforestoring2-37TM11-5820-489-10TO31R4-2GRA6-31SectionIV.OPERATIONUNDERUNUSUALCONDITIONS2-7.GENERALTheControlGroupisdesignedtobeoperatedinalltypesoftemperature,humidityorweatherconditions.But,specialprecautionsmayhavetobetakenwhentheseconditionsgotoextremes.Thissectiongivesprocedurestofollowinextremeweatherconditions.2-8. OPERATION INARCTIC(BELOWZERO)CLIMATESGGGGGGGHandleallequipmentwithcare.Keepequipmentwarmwiththefollowinginsulations:GKimpackGSpunglassfibermaterialGAnimalskinsGWoolenmaterialKeepfrostfrommicrophoneofhandset.Coverwithrubberorplasticdiaphramprovided.IficegetsintoHandset,removecapandtakeiceout.Coldequipmentmaysweat.Bringtoroomtemperature,thendrythoroughly.Topreventfailureofbatteries,protectthemfromthecold.RefertoTB43-0118.2-9. OPERATION IN TROPICAL CLIMATESGProblemsthatmayoccur:G ExtremewetnessGFungusgrowthGPoorairflowGHighhumidityformingwateronequipmentGToavoidtheseconditions:G Keepequipmentdry.G Useheatfromlightbulbsorheaterstodryequipment.G Refer to TB 43-0118.2-10. OPERATION IN DESERT CLIMATESGGGGGGGUsedustproofcontainerstokeepsand,dust,anddirtoutofequipment.Protectmovingpartssuchasthegeneratorandswitches.Coverequipmentincontainerswithwetsacking.Linewallsofcontainerwithheavypaper.NEVERtietelephonelines,orotherwiringconnectionstotents(suddenwindscanbreakthelines).Gritwilldamageswitchesandgenerator.RegularPMCShelpavoidthisdirt/greasebuildup.Refer to TB 43-0118.2-38TM11-5820-489-10TO31R4-2GRA6-31CHAPTER3MAINTENANCE INSTRUCTIONSPAGECleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Batteries, Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Batteries, Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Neon Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Troubleshooting Information.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1( 2- 39bl ank) / 3- OTM11-5820-489-10TO31R4-2GRA6-313-1.G3-2.MAINTENANCE INSTRUCTIONSSection I. TROUBLESHOOTINGTROUBLESHOOTINGINFORMATIONThisinformationwillberestrictedtotheuseofoperationaltestexplainedinparagraph2-8.Iftheproblemcannotbesolvedbytheoperator,throughOperatorsPreventiveMaintenance,ahighermaintenanceorrepairlevelisneededReportanymalfunctionsorequipmentfailuresonproperFormDA-2404or,refertoTM38-750.Section Il. MAINTENANCE PROCEDURESINTRODUCTIONTheoperatorofthisControlGroupwillberequiredtodocertainmaintenancetasks,suchasinspectionandservice.3-3.INSPECTIONGInspectthefollowingswitchesforsmoothmechanicalaction,freedomfromexternalorinternalbinding,andexcessivelooseness:LOCALswitch(atbothunits)REMOTEswitch(atLocalunit)SELECTORswitch(atRemoteunit)3-1TM11-5820-489-10TO31R4-2GRA6-31GInspectthefollowingforfrayedinsulation,cracking,excessivelywornareasorchafing:cables,cords,andwiring.connectorsG Inspectthefollowingforlooseness,dents,rust,andcorrosion:Latches,Hinges,andMetalSurfacesHandlesandD ringsCoversandProtectiveCapsLightbulbs-removeunitfromcase.OnLocalUnittheBA-30smustberemovedfirst.3-23-4. REMOVAL AND REPLACEMENTTM11-5820-489-10TO31R4-2GRA6-31a.NeonLamps(RemoteControlC-433/GRC).GReleasethetwosnapcatchesholdingtheoutercasetothepanelandchassisassembly.Removeunitfromcase.Pullthelampholdertotherear,outofthereceptacle.Pushandturnlampcounterclockwise.Pullthedefectivelampoutoftheholder.Pushareplacementlampintothelampholder,turnclockwiseandmakesureitisproperlyseated.Replacethelampholderinthereceptacle.Replaceunitincase.GGGGGGb.NeonLamps(LocalControlC-434/GRC).GLoosenthethumbscrewfastenersonthefrontpanelofunit,andremovethepanelandchassisassemblyfromthecase.Pullthelampholdertotherearoutofthereceptacle.Pushandturnlampcounterclockwise.Pullthedefectivelampoutoftheholder.ItmaybenecessarytoremovetheBA-30batteriestoremove/replacelamp.Pushareplacementlampintothelampholderandturnclockwiseandmakesureitisproperlyseated.Replacethelampholderinthereceptacle.Replaceunitincase.Batteries(RemoteControlC-433/GRC).Releasethetwosnapcatchesholdingtheoutercasetothepanelandchassisassembly.Removetheassemblyfromthecase.Slidethebatterycompartmentcoverbacktoclearthetabsononeside.Removethecover.Removethetwobatteries(BA-30)fromthebatterycompartment.Unplugthebatterycablefromthesocketontheendofthelargebattery(BA-414/U).Removethelargebatteryfromthebatterycompartment.Replacetwofreshbatteries(BA-30)inthebatterycompartment(alternatepolarities).Replacelargebattery(BA-414/U)inbatterycompartmentandinsertbatterycableintosocketatendofthebattery.Thesocketattheendofthebatteryshouldbefacingoutward,towardtherearoftheUnit.Replacethebatterycompartmentcoverbyfirstinsertingthetabsononesideofthecoverunderthebracketanglesonthesideofthechassisframe.Then,slidethecoverforwardandpresstolockitintoplace.ReplaceUnitincaseandsecurethetwosnapcatches.3-3GGGGGGc.GGGGGGTM11-5820-489-10TO31R4-2GRA6-31d.Batteries(LocalControlC-434/GRC).NOTEGGGGGGGG3-5.ItmaybenecessarytoremovetheOringfromthepowercableconnectortoremoveUnitfromcase.LoosenthethumbscrewfastenersonthefrontpanelofUnit,andremovethepanelandchassisassemblyfromthecase.Turnthepanelandchassisassemblybottomsideupandreleasethecatchthatholdsthebatterycompartmentcoverinplace.Remove the cover.Removetwobatteries(BA-30).Placetwofreshbatteriesinthebatterycompartment(alternatepolarities).Replacethebatterycompartmentcover.ReplaceUnitincaseandsecurethumbscrewfasteners.ReplaceOringonpowercableconnector.CLEANINGServicewillberestrictedtocleaning,dusting,orwashing.AdequateventilationshouldbeprovidedwhileusingTRICHLOROTRIFLUORO-ETHANE.Prolongedbreathingofvaporshouldbeavoided.Thesolventshouldnotbeusednearheatoropenflame;theproductsofdecompositionaretoxicandirritating.SinceTRICHLOROTRIFLUOROETHANEdissolvesnaturaloils,pro-longedcontactwithskinshouldbeavoided.Whennecessary,usegloveswhichthesolventcannotpenetrate.Ifthesolventistakeninternally,consultaphysicianimmediately.a.Removegrease,fungusandground-indirtfromyourequipmentwithaclothdampenedwithcleaningsolvent.b.Dustorwashwithclean,softcloth.3-4TM11-5820-489-10TO31R4-2GRA6-31APPENDIXAREFERENCESA- 1. I NTRODUCTI ONThisappendixlistsallformsandpublicationsthatcontaininformationontheopera-ti onandmai ntenanceofGroupControl AN/GRA-6.A- 2. FORMSRecommendedChangestoEqui pmentTechni calPublications..........................................DAForm2028-2EquipmentInspectionandMaintenanceWorksheet.........DAForm2404QualityDeficiencyReport(forEIR)........................SF368A-3.TECHNICALMANUALSOper at or sandOr gani zat i onMai nt enance: Mul t i met erAN/URM-105andAN/URM-105C(Incl udi ngMul ti meterME-77/UandME-77C/U................................TM11-6625-203-12Operator sandOrgani zati onal Mai ntenanceManual :Vol tmeter,MeterME-30A/UandVol tmeters,El ectroni cME-30B/U,ME-30C/UandME-30E/U.....................TM11-6625-320-12Operator,Organi zati onal ,DS,GS,andDepotMai ntenanceManual :Audi oOsci l l atorTS-421C/U(NSN6625-00-435-2588)................................TM11-6625-355-15-1Operat or s, Organi zat i onal , DS, GSandDepot Mai nt enanceManual:MultimeterTS-352B/U(NSN6625-00-553-0142)....TM11-6625-366-15Operator,Organi zati onal ,Fi el dandDepotMai ntenanceManual:TestFacilitiesKit,RadioMK-153/GRC............TM11-6625-408-15AdministrativeStorageofEquipment......................TM740-90-1HandReceiptManual....................................TM11-5820-489-10-HRTheArmyMaintenanceManagementSystem(TAMMS)......TM38-750A- 4. MI SCELLANEOUSPUBLI CATI ONSConsolidatedIndexofArmyPublicationsandBlankForms...DAPam310-1FSCClass6135,DryBatterySupplyData...................SB11-6Fi el dI nst ruct i onsf orPai nt i ngandPreservi ngEl ect roni csCommandEqui pmentIncl udi ngCamoufl agePatternPaintingofElectricalEquipmentShelters.................TB43-0118A-1/(A-2blankTM11-5820-489-10TO31R4-2GRA6-31APPENDI XBCOMPONENTS OF END I TEMSec t i on I . I NTRODUCTI ONB-1. ScopeThisappendixlistsintegralcomponentsofandbasicissueitemsfortheAN/GRA-6tohel pyoui nventoryi temsrequi redforsafeandeffi ci entoperati on.B- 2. GeneralThisComponentsofEndItemListisdividedintothefollowingsections:a.SectionII.IntegralComponentsoftheEndItem.Notapplicable.Theseitems,whenassembl ed, compri set heAN/ GRA-6andmust accompanyi t wheneveri t i st ransf erredort runedi n. Thei l l ust rat i onswi l l hel pyoui dent i f yt hesei t ems.b.SectionIII.BasicIssueItems.Notapplicable.Thesearetheminimumessen-ti al i temsrequi redtopl acetheAN/GRA-6i noperati on,tooperatei t,andtoper-f ormemergencyrepai rs. Al t houghshi ppedseparat el ypackedt heymust accom-panyt heAN/ GRA-6duri ngoperat i onandwheneveri t i st ransf erredbet weenac-count abl eof f i cers. Thei l l ust rat i onswi l l assi st youwi t hhard-t o-i dent i f yi t ems. Thi smanual i syour aut hor i t yt or equi si t i onr epl acement BI I , basedonTOE/ MTOEauthori zati onoftheendi tem.B-3.ExplanationofColumnsa.Column(1)-IllustrationNumber(IllusNumber).Thiscolumnindicatesthenumberofthei l l ustrati oni nwhi chthei temi sshown.b.Column(2)-NationalStockNumber.IndicatestheNationalstocknumberassi gnedtothei temandwi l l beusedforrequi si ti oni ngpurposes.c.Column(3)-Description.IndicatestheNationalitemnameand,ifrequired,aminimumdescriptiontoidentifyandlocatetheitem.Thelastlineforeachitemin-di catedtheFSCM(i nparentheses)fol l owedbythepartnumber.d.Column(4)-UnitofMeasure(U/M).Indicatesthemeasureusedinperform-i ngt heact ual operat i onal / mai nt enancef unct i on. Thi smeasurei sexpressedbyatwo-characteral phabeti cal abbrevi ati on(e.g.,ea,i n,pr).e.Column(5)-Quantityrequired(QtyRqd).Indicatesthequantityoftheitemauthori zedtobeusedwi th/ontheequi pment.B-1TM11-5820-489-10TO31R4-2GRA6-31Remote Control C-433/GRC Loudspeaker, Dynamic LS-166/USECTION Il. COMPONENTS OF END ITEM(1) (2) (3) (4) (5)ILLUS. NATIONAL DESCRIPTION USABLE U/M QTYNO. STOCK ON REQDNUMBER (FSCM) AND PART NUMBER CODE1 5965-00-163-9947 HANDSET(BLACKPLASTICBAT-TERYPOWEREDMAGNETIC) EA 22 5820-00-511-4319 INTERCONNECTINGBOX(3/8IN.DIA.CABLEACCOM.ALU.W/COVER) 85578 (80063) EA 13 5820-00-170-4781 LOCALCONTROL(MANUALCON-TROLAC-DC)42368 (80063) EA 14 5820-00-170-5171 REMOTECONTROL(MANUALCON-TROL AC-DC) 42454(80063) EA 15 5965-00-243-6420 LOUDSPEAKER(DYNAMIC)2677 (80063) EA 1B-2BagCW-189/GRCSECTION Ill. BASIC ISSUE ITEMS(1)ILLUS.NO.TM11-5820-489-10TO31R4-2GRA6-313Li neWD- 1/ TT(2)(3) (4) (5)NATIONAL DESCRIPTION USABLE U/M QTYSTOCK ON REQDNUMBER (FSCM) AND PART NUMBER CODE1BAG(COTTONDUCK,OLIVEDRAB)FORCARRYINGANDSTORINGCONTROLGROUP40635 (80063) EA 12 6240-00-223-9100 RUNNING SPARES - GE NE-51LAMP, GLOW, NEON, 2 FORLOCAL AND 2 FOR REMOTECONTROL49956 SET 1TECHNICALMANUAL(TM 11-5620-489-10) EA 23 TELEPHONELINE(WD-1/TT) FT 2B-3(B-4blank)TM11-5820-489-10TO31R4-2GRA6-31APPENDIXCADDITIONAL AUTHORIZATION LISTSectionI.INTRODUCTIONC-1.SCOPEThisappendixlistsadditionalitemsyouareauthorizedforthesupportoftheControlGroup.C-2.GENERALThislistidentifiesitemsthatdonothavetoaccompanytheControlGroupandthatdonothavetobeturnedinwithit.TheseitemsareallauthorizedtoyoubyCTA,MTOE,TDA,orJTA.C-3.EXPLANATIONOFLISTINGNationalstocknumbers,descriptions,andquantitiesareprovidedtohelpyouidentifyandrequesttheadditionalitemsyourequiretosupportthisequipment.Theitemsarelistedinalphabeticalsequencebyitemnameunderthetypedocument(i.e.,CTA,MTOE,TDA,orJTA)whichauthorizestheitem(s)toyou.Iftheitemyourequirediffersbetweenserialnumbersofthesamemodel,effectiveserialnumbersareshowninthelastlineofthedescription.Iftheitemrequireddiffersfordifferentmodelsofthisequipment,themodelisshownundertheUsableOnheadinginthedescriptioncolumn.( 1 )ILLUSNO.12SECTIONIl.ADDITIONALAUTHORIZATIONLIST(2)NATIONALSTOCKNUMBER6135-00-120-10206135-00-125-5256DESCRIPTION USABLE U/M QTY(FSCM) AND PART NUMBERON REQDCODEBATTERY, DRY (1.5V FOR LOCALCONTROLANDREMOTECONTROL) EA 2BATTERY, DRY (45V TOPPED AT22V) FOR REMOTE CONTROL EA 1C-1/(C-2blank)TM11-5820-489-10TO31R4-2GRA6-31APPENDIXDEXPENDABLE SUPPLIES AND MATERIALS LISTSectionI.INTRODUCTIOND-1.SCOPEThisappendixlistsexpendablesuppliesandmaterialsyouwillneedtooperateandmaintaintheControlGroup.TheseitemsareauthorizedtoyoubyCTA50-970,ExpendableItems(ExceptMedical,ClassV,RepairParts,andHeraldicItems).D-2. EXPLANATION OF COLUMNSa.Column(1)-ItemNumber.Thisnumberisassignedtotheentryinthelistingandisreferencedinthenarrativeinstructionstoidentifythematerial(e.g.,"Usecleaningcompound,item2,App.D).b.Column(2)-Level.Thiscolumnidentifiesthelowestlevelofmaintenancethatrequiresthelisteditem.C-Operator/Crewc.Column(3)-NationalStockNumber.ThisistheNationalstocknumberassignedtotheitem;useittorequestorrequisitiontheitem.d.Column(4)-Description.IndicatestheFederalitemnameand,ifre-quired,adescriptiontoidentifytheitem.ThelastlineforeachitemindicatestheFederalSupplyCodeforManufacturer(FSCM)inparentheses.e.Column(5)-UnitofMeasure.Indicatesthemeasureusedinperformingtheactualmaintenancefunction.Thismeasureisexpressedbyatwo-characteralphabeticalabbreviation(e.g.,ea,in,pr).Iftheunitofmeasuredif-fersfromtheunitofissue,requisitionthelowestunitofissuethatwillsatisfyyourrequirements.D-1TM11-5820-489-10TO31R4-2GRA6-31SectionIl.EXPENDABLESUPPLIESANDMATERIALSLIST(1) (2) (3) (4) (5)ITEM LEVEL NATIONAL DESCRIPTION U/MNO. STOCKNUMBER1 c 8305-00-267-3015 Cleaningcloth yd.2 c 6850-00-105-3084 Trichiorotrifluoroethane oz.CleaningcompoundD-2TM11-5820-489-10TO31R4-2GRA6-31GLOSSARYALTERNATINGCURRENT(ac)-Electriccurrentflowingtwoways,continuously,reversingdirectionandchanginginpower.AUDIO-Portionofsoundwavesthatcanbeheard.BREAK-IN-Abilitytoenterintoorinterruptaconversation.BREAK-INOPERATION-Theabilityofanoperatortoenterintoorinterruptaconversationbetweentwotalkingpositions.BINDINGPOST-Connectors(L1andL2)usedfortheconnectionofwireends.CRANK-Handleusedtoturngenerator,thuscreatingenergy.DIRECTCURRENT(dc)-Electriccurrentflowingonewayandconstantinvalue.INPUT-Informationtakenin.HERTZ-Unitoffrequencyexpressedincyclespersecond.KIMPACKWRAPPING-Insidecoveringusedforpackingorrepacking.NEGATIVEELECTRODE-Pertainstobatteries-endthatdoesnotconductenergy(usuallyflatend).MONITORING -Toobserve.OCTALPLUG-Eightprongedplugthatfitsintotheendoftheoctalsocketofabattery.OCTALSOCKET-Socketwhichacceptseightprongedplug.OHM-Unitofelectricalresistanceequaltoresistanceofacircuitwhereapossibledifferenceofonevoltproducesacurrentofoneampere.OUTPUT-Informationgivenout.POLARITY-Eitherpositiveornegative.Indicateswhichleadistobecon-nectedtoagivenpoint.POSITIVEELECTRODE-Pertainstobatteries-endthatconductsenergy(usual-lytheraisedend).Glossary-1TM11-5820-489-10TO31R4-2GRA6-31GLOSSARY-ContinuedRECEIVER-Personorradiosetthatgetsradiowavesignalsfromatransmitter.RUNNINGSPARES-Extraparkprovidedwiththeoriginalequipment.SIDETONE-Soundofyourowntransmissionheardinhandsetearphone.STAND-BY-ReferstotheswitchpositionusedtomaintainacontinuoustelephonecircuitbetweentheLocalandRemoteOperators.Thisswitchposi-tion(TELatLocalControlandTELONLYatRemoteControl)alsopreventsac-cidentaloperationoftheRadioSetatRemoteControl.TRANSMISSION-Awaytosendradiowavesreceivingstation.TRANSMITTER-Thepersonorradiosetthatbysignalsormessagestoasendsasignal.Glossary-2TM11-5820-489-10TO31R4-2GRA6-31PAGEAAbbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjustments, Initial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Arctic, Operation in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Assembly and InstallationAccessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loudspeaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Radio Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AuxiliaryComponentsHandset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Running Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BBag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BatteriesCompartment Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .In Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .In Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installation of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Notion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Blanks, Write-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Break-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Busy Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..CCable Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cable Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Carrying Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Checks, Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Circuit, Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Components, AuxiliaryHandset . . . . . .Running SparesConnector, Audio.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22-242-382-232-132-192-172-162-142-13B-2B-31-31-43-43-32-131-72-252-342-362-191-5, 2-191-5, 2-202-221-32-82-243-4B-2B-32-4I ndex -1TM11-5820-489-10TO31R4-2GRA6-31INDEX - ContinuedSUBJECTCControl GroupCapabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation in Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operation in Usual Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Control,LocalBatteries.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Break in with . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cable Compartments . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .Cap . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .O Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Panel Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Control,RemoteBatteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Battery Compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Break in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Description of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PaneI,Front.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Controls . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cross-Reference List, Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . .1-21-31-22-02-382-131-61-22-17,3-42-341-5, 2-191-5, 2-202-332-172-272-12-13,3-31-42-361-41-32-132-342-272-52-51-1Data, Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Description of Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Desert Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38DifferenceinModels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6DRings . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4FFeatures of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Forms, Records and Reports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1I ndex -2TM11-5820-489-10TO31R4-2GRA6-31INDEX - ContinuedGGenerator, Ringing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4HHandsetDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23Using Push-to-Talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28 I IndicatorsCall Light . . . . . ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2-4Dimmer . . . . . . ......... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4Local Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-5Initial Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24InterconnectionBoxDescription . . . . ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3Installation . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16Inspection . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1InstallationandAssemblyAccessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....2-19Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17Radio Set to Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13LLamps, Neon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..1-7, 3-3Lines, Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23LocalControlBatteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17,3-4Battery Compartment in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17Break-in with . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-34Cable Compartment of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27PaneI, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1I ndex-3TM11-5820-489-10TO31R4-2GRA6-31INDEX-ContinuedSUBJECTPAGELLoudspeaker Push-to-Talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...MMaintenanceCleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PMCS Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preventive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Models, Differences in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mounting, Connection to Local Control . . . . . . . . . . . . . . . . . . . . . . ..NNeon Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Nomenclature Cross-Reference List . . . . . . . . . . . . . . . . . . . . . . . ..OO Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .OperationIn Arctic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .In Desert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .In Tropical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Usual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P2-161-62-163-53-12-82-82-93-11-62-332-221-7,3-31-12-172-382-382-382-272-302-382-13PanelOf Local Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Of Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8ProceduresMaintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1I ndex- 4Index-5TM11-5820-489-10TO31R4-2GRA6-31INDEX - ContinuedPAGEPPush-to-TalkFrom local control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .From remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RadioSetConnectingtolocalcontrol....R. . . . . . . . . . . . . . . . . . . . . . . . .Mounting to local control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Range of Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Receptacle connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Records, Forms and Reports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RemoteControlBatteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Battery compartment in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Break-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D" rings on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Description of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Operating procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PaneI, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Push-to-Talk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RemovalandReplacementBatteries for local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Batteries for remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Neon lamps for local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Neon lamps for remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ringing signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rings" O "Running spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ."D"S2-262-252-192-221-22-41-12-14, 3-31-42-361-41-32-132-342-272-52-253-43-33-33-32-281-42-17B-3Signals, Ringing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28Spares, Running . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..B-3Stand-by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24Stopping Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2-37Strap, Carrying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Index-6TM11-5820-489-10TO31R4-2GRA6-31SUBJECTINDEX - ContinuedPAGETTelephoneBusy Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check of Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Ring Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Two-Way Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Transmission Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UUnusualConditionsOperation in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UsualConditionsOperation in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Write-inBlanks..W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-362-242-232-302-341-23-12-382-132-25ByOrderoftheSecretariesoftheArmyandtheAirForce:JOHN A. WICKHAM JR.General, United States ArmyChiefofStaffOfficial:ROBERTM.JOYCEMajorGeneral,UnitedStatesArmyTheAdjutantGeneralOfficial:JAMESP.MULLINSGeneral, USAF,Commmander,AirForceLogisticsCommandCHARLES A. GABRIELGeneral,USAFChiefofStaffDISTRIBUTION:To be distributed in accordance with DA Form 12-51, Operators Maintenancerequirements for AN/GRA-6.*U.S.GOVERNMENTPRINTINGOFFICE:19930342-421(62713):QL4PIN: 052662-000This fine document...Was brought to you by me: Liberated Manuals -- free army and government manualsWhy do I do it? I am tired of sleazy C-!"M sellers# $ho ta%e &ublicly available information# sla& '$atermar%s( and other )un% on it# and sell it. Those masters of search engine mani&ulation ma%e sure that their sites that sell free information# come u& first in search engines. They did not create it... They did not even scan it... Why should they get your money? Why are not letting you give those free manuals to your friends?I am setting this document *!++. This document $as made by the ,- .overnment and is /"T &rotected by Co&yright. *eel free to share# re&ublish# sell and so on.I am not as%ing you for donations# fees or handouts. If you can# &lease &rovide a lin% to liberatedmanuals.com# so that free manuals come u& first in search engines:Free Military and o!ernment Manuals "incerely#$or %hudo!http://i$or.chudo!.com/