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1、.-*- HANDBOOK OVERHAUL INSTRUCTIONS RADIORECEIVER MODELSP-600-JX-21 (HAMMARLUND) PUBLISHEDUNDERAUTHORITYOFTHESECRETARYOFTHEAIRFORCE =-*-_-! AirForceOC.29Jul65-50-Reprint15JANUARY1956 A T.O. 31R2-4-101-3 Reproductionfornon-militaryuseoftheinformationorillustrationscontainedin thispub- licationisnotpe
2、rmittedwithoutspecificapprovaloftheissuing service (BuAerorUSAF). ThepolicyforuseofClassified PublicationsisestablishedfortheAirForce inAFR205-1 andfortheNavyinNavyRegulations,Article1509. LISTOFREVISEDPAGESISSUED INSERTLATESTREVISED PAGES.DESTROYSUPERSEDEDPAGES. NOTE:Theportionofthetextaffected byt
3、hecurrentrevisionisindicatedbyaverticallineintheoutermarginsofthepage. *Theasterisk indicates pages revised. addedordeleted by tbe current revision. ADDITIONALCOPIES OF THISPUBLICATIONMAYBEOBTAINEDASFOLLOWS: USAFACTIVITIES.-InaccordancewithTechnicalOrderNo.0052. NAVYACTIVITIES.-Submitrequesttoneares
4、tsupplypointlistedbelow,usingformNavAer140:NASD,Philadelphia,Pa.; NAS,Alameda,Calif.;NAS,Jacksonville,Fla.;NAS,Norfolk,Va.;NAS,SanDiego,Calif.;NAS,Seattle,Wash.; ASD,NSC,Guam. Forlistingofavailable material and detailsofdistribution seeNavalAeronauticsPublicationsIndexNavAer00-500. USAF T.O.31R2-4-1
5、01-3 TableofContents TABLEOF CONTENTS II III XII VIII Page 1 1 1 1 1 3 3 3 5 5 5 7 7 7 11 11 11 11 11 11 11 12 12 13 15 17 17 17 17 17 19 19 19 20 20 21 21 21 21 21 22 22 22 23 23 23 23 23 23 INTRODUCTION IDESCRIPTIONANDLEADINGPARTICULARS 1-1.General. 1-3.PertinentInformation. 1-5.DifferenceDataShee
6、ts TESTEQUIPMENTANDSPECIALTOOLS. 2-1.TestEquipment 2-3.SpecialTools. IXREASSEMBLYANDTESTINGOFCOMPONENTS 9-1.General. 9-3.ReassemblyofChassisandTuningUnitAssembly. 9-5.ReassemblyofChassisandPanelAssembly. 9-7.ReassemblyofR-fTuners 9-9.ReassemblyofPlugConnectorAssemblies 9-11.ReassemblyofRadio Receive
7、r . 9-13.Testing XFINALREASSEMBLY XIINSPECTION,TESTING,ANDPACKAGING 11-1.General. 11-3.MinimumPerformanceandTestValues 11-5.Packaging. DIFFERENCEDATASHEETS. VIINSPECTION 6-1.General. 6-5.Chassis Assembly Inspection. 6-8.SubassemblyInspection. 6-10.PartsInspection . 6-31.ServiceLimits. REPAIRANDREPLA
8、CEMENT. 7-1.General. 7-3.Switch BaseandSpringAssembly. 7-7.SelectivitySwitch. . 7-9.Retropicalization. REASSEMBLYANDTESTINGOFSUBASSEMBLIESAND ASSEMBLIES 8-1.General 8-3.ReassemblyofTuningUnitAssembly. 8-5.ResolderingandRetropicalization 8-7.TestingofSubassembliesandAssemblies. MAINTENANCEBEYONDCAPAB
9、ILITIESOFFIELD 3-1.General. 3-5.Specialized MaintenanceProcedure. IVDISMANTLINGANDDISASSEMBLY 4-1.Dismantling. 4-5.Disassembly. VCLEANING. 5-1.Overall. . 5-3.ElectricalParts. 5-5.MechanicalParts. 5-8.PreservationAfterCleaning. Section .VII Listof Illustrations Listof Tables Figure I-I. 2-1. 2-2. 2-3
10、. 2-4. 4-1. Table I II T.O.31R2-4-101-3 LIST OF ILLUSTRATIONS Radio Receiver,ModelSP-600-JX-21 SpecialToolsto Reassemble R-f Strip Assembly SpecialToolsto ReassembleTuningUnitShield Assembly SpecialToolsto ReassembleTurretRotorAssembly. SpecialToolsto ReassembleGear-trainAssembly Gear-train Assembly
11、,ExplodedView. LIST OFTABLES SpecialToolsRequired forOverhaul. IdentificationofR-fTuners Page ii 3 3 4 4 8 Page 3 22 Figure1-1.Radio Receiver,ModelSP-600-JX-21 ii T.O.31R2-4-101-3 INTRODUCTION Thishandbookhas beenpublishedtofurnishmaintenancedepotpersonnelwith descriptiveinformationandoverhaulinstru
12、ctionsforRadioReceiver,ModelSP-600- JX-21,manufacturedby theHammarlundManufacturingCo., Inc.,NewYork1,N.Y. Thehandbookhas beenpreparedinaccordancewithSpecification MIL-H-6814A (ASG).Abbreviations usedareinaccordancewithAirForce-NavyAeronautical BulletinNo.261. Electricalandelectronic symbols usedint
13、heschematic diagrams conformtoStandardJAN-STD-15. Foradditionalinformationontheradioreceiyer, thefollowingpublications shouldbe consulted: Introduction Section I Title HandbookOperationInstructions,RadioReceiver, ModelSP-600-JX-21 HandbookService Instructions,RadioReceiver, ModelSP-600-JX-21 Illustr
14、atedPartsBreakdown,RadioReceiver, ModelSP-600-JX-21 SECTION I PublicationNo. T.O.31R2-4-101-1 T.O.31R2-4-101-2 T.O.31R2-4-101-4 DESCRIPTIONANDLEADING PARTICULARS 1-1.GENERAL. 1-2.Thispublication comprisesoverhaulinstructions forRadio Receiver,ModelSP-600-JX-21(figure1-1), manufacturedby theHammarlun
15、dManufacturingCo., Inc.,NewYork1,N.Y. Note Refertothe applicablehandbookofservice instructionsfora detailed descriptionandlead- ingparticularsofthereceiver. 1-3.PERTINENTINFORMATION. 1-4.Thereceiverr-fcoils,r-fchokes,andallsoldered connections are treatedwithfungicidal varnish.Allmetal partsincontac
16、tconformtothe electrochemical series so thatcorrosion iskepttoa minimum.Inviewofthe fact thatall possible precautions aretakenatthefactoryto provideeach receiverforuseinperfectcondition, need- lessunsolderingandreplacementofpartsduringover- hauloperationsshouldbe avoided. 1-5.DIFFERENCE DATASHEETS.
17、1-6.Sections IthroughXIofthishandbookapplyto RadioReceiver,ModelSP-600-JX-21.Additionalmodels will be coveredinSectionXIIby the useofDifference DataSheets. 1-7.Overhaulinstructionsforany modelstobe in- cludedinSectionXIIwillbethesame astheprocedures giveninSections IthroughXI,exceptforthespecific di
18、fferencesnotedbytheapplicableDifferenceData Sheets. 1/2 T.O.31R241013 SECTIONII TESTEQUIPMENTANDSPECIAL TOOLS SectionII Paragraphs2-1to2-4 2-1.TESTEQUIPMENT. 2-2.Nospecial testequipmentisrequiredtoalign, adjust,orfinal test theradioreceiver.Tofacilitate the testingofthe receiver a testpositionshould
19、be main- tained,providedwiththeappropriatetestequipment andfabricated cables describedinthe applicablehand- bookofservice instructions. 2-3.SPECIAL TOOLS. 2-4.Thespecialoverhaultoolsrequiredtoperform theworkoutlinedin this publicationarelistedintable I.Thetable referstothe figureandindexnumberofthe
20、illustrationforeach tool, the toolpartnumber,andthe tool name.Theapplicationcolumninthe table briefly denotes the receiver subassemblyorpartsto which the respective tools areappliedwhenthe receiver is over- hauled.Themannerofuseandapplicationofeachtool isoutlinedindetail inparagraphs7-6and8-4. TESTI
21、.SPECIAL TOOLS REQUIRED FOROVERHAUL Figure utilizeana-c vacuum- tubevoltmeterora cathode-ray oscilloscopeindicationto determinewhether.the capacitor isopen.Eachofthe followingcircuit indications, as applicable, providesfor checkinganopencapacitor. a.Whenthe capacitor isinserieswiththesignalpath ofth
22、ereceiver,butopen,itsinputsignalindicationis muchhigherthanitsoutputsignal indication,toground in each instance. b.Whenthecapacitor provides areturnpathto groundforthesignal,butisopen,itungroundedter- minalisatana-c voltage level aboveground. c.When.thecapacitor is usedtotunea circuitto resonance,bu
23、tisopen,the circuit inductancecannotbe adjustedforresonance. d.Whenthe capacitor is usedtopt.:ovide audio filter- ingaction,butisopen,itsungroundedterminalwill provideindicationofexcessive ripple, ascomparedto whentheopencapacitor isshuntedby anormalcapacitor. e.Whenthe capacitor is usedtoprovidedec
24、oupling actioninr-f circuits,butisopen,moresignalindication may be observed across its terminals, ascomparedto whentheopendecouplingcapacitor isshuntedby a normalcapacitor. 3-10.SHORTEDCAPACITOR.Ashortedcapacitor may berapidlyidentified becauseitcannothave adoc 5 SectionIII Paragraph3-11 T.O.31R2-4-
25、101-3 ora-cvoltagedropbetweenits terminals. Eachofthe followingcircuitindications,as applicable,providesfor checkingashortedcapacitor. a.Whenthecapacitorcircuitconnectionis suchthat oneofitsterminalsisnormallyatsome d-cvoltageabove ground,itcannotprovidea d-cvoltageindicationto groundwhenavolt-ohmme
26、terord-cvacuum-tubevolt- meterisusedtomakethetest. b.Whenthecapacitorcircuitconnectionissuchthat onlyana-cvoltageisnormallyeffectiveatitsterminals, possiblyduetothesignal,andthecapacitorisshorted, novacuum-tubevoltmeteroroscillographindication across thecapacitorresults.Inthis instance,thesignal usu
27、ally isnotevidentinthereceiver circuitry immedi- atelyfollowingthe capacitor. c.Whenthecapacitoris used as atrimmercapacitor, andisshorted,ithasnotrimmereffectontunedcir- cuits.Inthis instanceandwhenthecapacitoris used toprovidefortheparallelresonanceofadjustablecore tunedcircuits,thesignalis usuall
28、ynolongerevident inthesubsequentreceiver circuitry. d.Whenthecapacitorisshuntedby a resistor as is thecaseincertainofther-ftuners,andit is suspected thatthecapacitorisshorted,theshuntedresistor, meas- uredforresistance asoutlinedinparagraph3-7,will determinewhetherthecapacitorisshorted. 3-11.LEAKYCA
29、PACITOR.Whenacapacitorissus- pectedofbeingleaky,avoidhavingtounsolderoneof thecapacitorterminalsfromthereceiver byutilizing 6 every possible receiverswitchand/ortubemeansto isolatethecapacitorterminal.Todeterminewhethera capacitorisleakydothefollowing: a.Turnthereceiver off. b.Adjustthevolt-ohmmeter
30、toitshighestohmmeter rangeandconnectitacrossthecapacitor.Ifthecapacitor isgoodtheohmmeterpointerwillflickoverslightly andgraduallydropbacktoinfinity. c.Nowreversethetestprods.Notethatiftheohm- meterdeflection is twicethatobtainedinstepb,withthe pointerthenreturningtothepositionindicatinginfinite res
31、istance,thecapacitorisgood.Ifthepointerdoesnot gobacktoinfinite resistanceindication,thecapacitoris leakyandshouldbe replaced.Thistest isnotreliablefor capacitorswhosecapacitance value is lessthan0.05 uf. Note Whenthecapacitorisanelectrolytic type,one readingwillshowlowresistanceandtheother muchhigh
32、er.Ifthehigherresistance isnot over100,000ohmsandcomparabletothatofa sparecapacitor,theelectrolyticcapacitormust be replaced. Makesuretoturnthereceiveronatleast 15 minutesbeforemakingthetest sothatany electrolyticcapacitordielectric filmdeteriora- tionmay berepairedbysubjectingthecapacitor toitsdocw
33、orkingvoltage.Turnthereceiver off,anddischargethecapacitorbeforemaking a resistancemeasurement. T.O. 31R2-4-101-3 SECTIONIV DISMANTLING ANDDISASSEMBLY SectionIV Paragraphs4-1to4-7 4-1.DISMANTLING. 4-2.PRELIMINARYPROCEDURE. a.Removethecartonedradioreceiverfromits woodenshippingboxandthenunpackitcompl
34、etely. b.Dismantletheradioreceivertopcoverandbottom platefromthe receiver chassisandpanelassembly. c.Dismantletheplugconnector assemblies,theelec- trontube complement,thefrontpanelcontrols,the frequencycontrolunitswitcharmandeccentricdrive assembly,thefrontpanelassembly, etcfromthe receiver chassisa
35、ndpanelassembly. d.Stripthe main dialindicatorandmounting,both mainandvernier dials,bothside plates, etcfromthe receiver chassisandtuningunitassembly. 4-3.DISMANTLINGTHETUNINGUNITASSEM- BLY.Todismantle thetuningunitassemblyfromthe receiver chassisandtuningunitassembly, usethefol- lowingstep procedur
36、e: a.Unsoldertwogreen/whiteleads,oneeachfrom terminalstripsEI4andEI7. b.Unsoldertwoblue/blackleadsfromsecondmixer transformerT2. c.Unsolderwhite/black,red/white,blue/red,yellow/ black,andred/greenleadsfromterminalstripE13. d.Unsoldertwored/green,onegreen/red,andone yellow/redleadsofthemainwiringcabl
37、efromcon- version switch S4. e.RemovetwoNo.10-32 screwsandonestudpost assembly,oneithersideoftuningunitassembly, which screwintonutplatebracketsthroughclearance holesin gear-trainplateandchassisproper. f.Remove oneNo.10-32 screwinanglebracketon rearoftuningunitassembly, which passesthrough clearance
38、 holeatbackofchassisproper. g.Liftoutthetuningunitassembly. 4-4.Thetuningunitassembly comprises several sub- assemblies which may bedismantledfromitandthen separately disassembled. These arethefollowing: a.Themixerplatecoil assemblyTl. b.Ther-fwiringassembly, i.e., ther-fstrip. c.Thevariable capacit
39、or, i.e., theeightsection, four- gangtuningcapacitor. d.Thegear-train assembly. e.The24 r-f subassemblies, i.e.,ther-f tuners. 4-5.DISASSEMBLY. 4-6.DISASSEMBLYOFGEAR-TRAINASSEMBLY. Thegear-trainassembly(figure4-1)is disassembledin accordancewiththefollowingstep-by-step procedure. a.Remove camandhuba
40、ssembly(1). b. Remove slidespring(2),thenremovefourscrews (4)andfourspacers(5)andremove the slideandroller assembly(3). c.Remove twodetentsprings(6)andleverandroller assembly(7). d. Remove screw(9)andtwoscrews(10)usedto mountbearingplate(8).Thenremove camandhub assembly(11),shaftandgearassembly(12),
41、flywheel andshaftassembly(13),andidler(14). e.Loosennut(16)andremovebearingscrew(15) andballbearing(17). f. Removetwoscrews(19)andbearingplate(18). g. Remove three screws(20)andthenremovethe shaftandgearassembly comprisedofhub(21),shaft andgearassembly(23)andretainingring(22).If required, removether
42、etainingring(22)anddisassemble thehub(21)fromshaftandgearassembly(23). h. Remove three screws(25)andthree posts(24). i.Remove dial,hubandgearassembly(26),gearand hubassemblies(27and28),andmain dialhubandgear assembly(29)byremovingthe associatedretainingrings (30).Thenremovegearanddrivepinassembly(31
43、) andballbearing(32). j.Removetwoscrews(33)andthenremovethegear plateassemblycomprisedoftwogears(34),two washers (36),tworetainingrings(35),andplateandpinassem- bly(37). k.Remove switchspring(38)andlever assembly(39). 1.Remove three screws(42)andthree lockwashers (43),andthenremovegear(40)andgear(41
44、).Remove three screws(45)andthreelockwashers(46),then removehub(44).Remove wavy washer(47),screw(49), mountingdiscandshaftassembly(48),andthree con- tact springs(50). m. Remove threespidersprings(51).Remove two screws(53)andnutplate(52).Remove ten screws(55) anddisassemble baseplateandspiderassembly
45、(54) fromtuningunitshield assembly(56). 4-7.DISASSEMBLYOFCHASSIS.Thechassis assem- bly may be disassembledinany sequence desired subse- quenttothe removalofthe three-section, four-pole, 7 Co) l-.) t . o . I Co) 47 II 11 II II II II I ) 5 39i/ 2.NutpI./ 535ate,CI .crew 54.Base pI38 55.Screwateandspid
46、erasseinbl 56.Tuniy ngUllltshieldassembly 54 5 46.Lock 4washer 7.Way 48MYwasher .ountingd 49.ScrewtsCandshaft 50.Canassembly 515dtactspring .pierspring 17 24 18 1.Camand h:;- 1.51d.ubassembl .1espnngy .1.Sitde and27.Gearand hb:=:- i.Snewwllmbly28.Gm,udhumbl, 5.Spacer29.MaindiIhubassembly G1)30R.auba
47、nd _.erentspring.etatntngringearassembl Leverd31.Gearadd. gy 8B. anroller32nnve. ,eanngplateassembly.Ballb.Ptn assembl- 9.Snew33.Sewu g , 10.Screw34.Gear 11.Camand h35.Retain. U.Sh,houd ub,mbl,36.Wh:u, 13.Flywh1gearassembly37.Platead 1 eeandsh f3nptn,.Idlmbl8.Swih.mbl, S.Bmi,39.Lmp,m, lGTng screw40G
48、assembly, .ut.ear 1-.Ballbearin41.Gear 18,Bearing42.Screw 195gplate4 crew3.Lockwh Snew44.Hub 21.Hub45.Screw 2)Ret. )_.atntngrin -3.Shafta dg 2-1,Postngearassembly 25,Screw 2(Dialh b,uandgear assembly Figure4-1.GeartrainAssembly,ExplodedVlew ( T.O.31R2-4-101-3SectionIV Paragraphs4-8to4-10 6-position
49、rotary selectivity switch assembly, which is removed firsttogetatall chassiswiringunderneathit. Thisswitch assembly comprisesrotaryswitch S5A,B,C, three resistors,eightinsulated electrical wires, five bare electrical wires,andtwo piecesofvinylitetubingwhich coverinparttwoofthe bare electrical wires.Theswitch assemblyisremovedinpreference toremovingthe rotary switchproperto minimize theunsolderingduringre- moval. 4-8.Certainothersubassembl
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