RCA 18V100 Instrukcja Użytkownika

>~ServiceManualRCAModel 18V100HomeTVProgrammeritc/il,wStudioII<,HomeTVProgrammer,Model18V100Operation•Testing•DisassemblyParts List^

^JFigure 23.StudioIIConsoleAssembly10

r~rCONSOLEDISASSEMBLYThe consoleconsists of sixseparatesubassemblies: the twohalves ofthe cabinet,printed circuit board, twokeyboards,and a"Clear

cable in slot in cover(Fig.27).Shieldmustbefully seated tominimize radiation of modulatedcarrier.4.Fromundersideof cover,bendclippedpigtailsback andco

rnected with reversed polarity. Use fabricated tool(Fig.28) topush LED into holder. LED "clicks" into place.Any toolwithoutashoulder usually

PCBoardExchangeEXCHANGEPLANDESCRIPTIONRCAoperates aPCboard refurbishingfacility atSwannanoa,NorthCarolina.DefectivePCboardssenttothisfacilityarerefurb

rsr~C/3Ih-e?z:o_i<i-oLLi_l00Ioo<h-O1STUDIO II PC BOARD1Pleasepackcompletedquestionnaire incontainer1(Price subject tochangewithoutnotice.)<1P

^^"j3RCA|Distributor andSpecial ProductsDivision|DeptfordNJ08096Tmk(s)®Marca(s)Registrada(s)Printed inU.S.A.11/77Form3E4589J

PRODUCTSAFETYNOTICEStudioII uses anisolated powersupply tooperate theelectroniccircuitry. The leakagecurrenttoground ofthispowerunit should becheckeda

rrPOWERSUPPLYUNIT18 FOOTCONSOLECORDTV/STUDIOIISELECTORSWITCHKEYBOARDAON/OFFINDICATOR LIGHTSTUDIO II CONSOLECLEARBUTTONKEYBOARDBCHANNEL2/CHANNEL3SWITCH

StudioIIServicingThe recommendedStudioII service procedureis to deter-minewhether the problemis in one ofthe peripherycomponents, theinterconnectingca

frrisindicatedon theTVscreen;if thereisnotrouble,thecartridgesets up atestforthetwokeyboards.NOTE:TheTestCartridgerequiressubstitutionof thepowerunitd

laxoosIT QdVO 3HV0-M--c+-!<<>£:sjsjJFigure10. Overall Block Diagram of Studio II System

r*rsatisfactorykeyboardfunction),thepatternshifts tothe"OK"patternofFig.9d.Thepatternflip-flopsbetweenblack-on-whiteandwhite-on-blackuntilth

Thekeys of KeyboardB"write"on thescreen accordingto the whitearrowheads on the keyboard (Fig. 15).Toforman interestingpattern, press "C

r<**r50ohmsresistancewithnegativeohmmeterpolarityonthecenterconductor.(Withpositivepolarityoncenterconductor,resistanceshouldbebetween20and30kohms.