Commodore 1541-II Guida Utente

irs?SR5X0."**11541MAINTENANCEGUIDE$6.95096-1301-10U,F1541MaintenanceGuide===—HI

SECTION2CALIBRATION

Section2-CALIBRATION2-1.GeneralThissectioncontainsstep-by-stepproceduresforcalibratingtheVIC-1541.Onlyonecalibrationadjustment,toadjustthespeedofthedi

ACCESSHOLEFORVR1TIMINGDISK2-4,60HzTIMINGMARKS50HzTIMINGMARKSFigure2-1.CalibrationVIC-1541PreparedforCalibration1.ConnectVIC-20/COMMODORE64tovideomonit

10.AdjustVR1(RefertoFigure2-1)untiltimingdiskappearstostop.#If60HzACisbeingused,calibratewiththeoutersetoftimingmarksonthetimingdisk.#If50Hz ACisbeing

2-5.HeadAlignment2-5-1.GeneralThisprocedurealignstheread/writeheadtothephysicaltracksonafloppydisk.Atrulyaccuratealignmentrequirestheuseofanalignmentr

2-5-2.EquipmentRequired1.Alignmentstandard-useafactoryrecordeddiskwhichhasnotbeenwrittentosincepurchase,oradiskwhichhasbeenformattedonaVIC-1541whichis

3.ConnectACpowercordbetweenJ9onVIC-1541andACoutlet.IWARNINGI•USEEXTREMECARETOAVOIDCONTACTWITHFRAMECOMPONENTS.HIGHACVOLTAGEPOTENTIALSAREPRESENTDURINGCA

14.ApplysmallamountofGlyptolorfingernailpolishtothetwoscrewssecuringsteppingmotorhousingtokeepthemfromcomingloose.15.ReassembletheVIC-1541.Steppingmot

2-6.MechanicalAlignmentofTrack#1Stop2-6-1.GeneralThisprocedureadjuststheTrack#1Stop.TheTrack#1StopisusedbythecomputerintheVIC-1541foronlytwopurposes:1

PIJ IPUBLISHEDBYPELTIERINDUSTRIES,INC735N.DorisWichita,Kansas67212Copyright1984byMICHAELG.PELTIERAllrightsreserved.PrintedintheUnitedStatesofAmerica.

TRACK#1STOPLOCK DOWNSCREWFigure2-3.Track#1StopAdjustment.Page2-9

2.ConnectAClinecordbetweenJ9andACoutlet.[WARNING!#DONOTCONTACTTHEFRAMEASSEMBLYORWIRING.THEVOLTAGEPOTENTIALSPRESENTONTHESEPARTSCOULDCAUSESEVEREINJURYOR

SECTION3TROUBLESHOOTING

Section3-TROUBLESHOOTING3-1.GeneralThissectionrequiresonlyaMultimeter(digitaltypeisrecommended)andwillisolateaproblemdowntothesub-assemblylevel.Itisse

8-2.TROUBLESHOOTING-PART1STEP1PROCEDURERemoveAClinecordandserialbuscables.Removetopcover.Removefusefromfuseholder.Measureresistanceofthefuseasfollows:

STEPPROCEDUREILLUSTRATIONDetermineproperoperationoftheframeassemblyasfollows:1.DisconnectJlfromPI.2.SetDMMtomeasureVoltsAC.3.ConnectnegativeleadofDMMt

STEP345PROCEDURE(ContinuetestingFrameAssembly.asfollows:1.PlacepowerswitchtoOFF.2.Connectnegativeleadof!DMMtopin2of Jl(A).3.ConnectpositiveleadofDMMto

STEP67PROCEDUREPlacepowerswitchtoON.Measuretestspointsintablebelow.TouchpositiveleadofDMMtoindicatedtestpoint.Verifythateachmeasurementiswithinthemini

STEPPROCEDUREILLUSTRATIONConnectJ6toP6.switchtoON.PlacepowerDoesredLEDcomeonmomentarily?YESPlacepowerswitchtoOFF.ProceedtoStep10.NOProceedtoStep9.Usin

WARNING:HIGHVOLTAGEEQUIPMENTTHISEQUIPMENTCONTAINSCERTAINCIRCUITSAND/ORCOMPONENTSOFEXTREMELYHIGHVOLTAGEPOTENTIALS.CAPABLEOFCAUSING SERIOUSBODILYINJURY

STEPPROCEDUREILLUSTRATION11ConnectpositiveleadofDMMtopin3ofJ5(A).ObserveDMMwhileplacingpowerswitchtoON.DoesDMMindicate0.0 to+0.8VwhentheredLEDisillumi

SECTION4SCHEMATICSANDPARTSLAYOUT

Section4-SCHEMATICSANDPARTSLAYOUTS4-1.GeneralThissectioncontainsSchematics,PartsLayoutDrawings,aFunctionalBlockDiagramandanInterconnectDiagram.Thesefi

TRACKSELECTIP7DISKCONTROLLERP3|SERIALBUSOPTICSP6DRIVEMOTORIP5READ/WRITEP2PWRIP8LEDr~DRIVEUNITCASEASSY(PWRLED)Figure4-1.InterconnectDiagramPage4-2

CASE ASSY(TOPHALF)SHIELDDRIVEUNITDISKCONTROLLERPCBOARDJ5J8FRAMEASSYCASEASSY(BOTTOMHALF)Figure4-2.Sub-AssemblyIdentificationPage4-3/(Page4-4Blank)

Figure4-3.FunctionalBlockDiagramPage4-5

itmiB"iFigure4-4.DiskController,Schematic(Sht.1of2)Page4-6

i"MUt\lifiO;;si5t5sAi~,Is.i!§1+\," IIJ?J>J1I111?•!illsi.illsii=fA1!lt\nr*iI"!^5!!IIU4*«n«*' -»"tSS8S8»858rTrfygrfsTs-SISO,

CDDenOjOifiOCDDrtIO00h-»Ocrt

J8,PWRLEDPWRLEDN/CGNDDSIIPOWER,(GN)IrH|CASEASSY|I1JFigure4-7.CaseAssy,SchematicJ8Figure4-8.CaseAssy,PartsLayoutPage4-9

IoCDCD3ftOCDrrH-OJ7,TRACKSELECT+I2V+I2V03010204RDRDYLORBKBR1|1 11lJLJLJLJ1—CSTEPPING-<MOTOR

J7J2Figure4-10.DriveUnit,PartsLayout(Top)DS1DRIVEMOTORSERVOCIRCUITFigure4-11.DriveUnit,PartsLayout(Bottom)Page4-11

%1Figure4-12.DriveServoCircuit,SchematicPage4-12

CMi3 o5«tUl UJ UJUJ UJOOAO O Ozommo>ocFigure4-13.DriveServoCircuit,PartsLayoutPage4-13

J9,ACLINEACHIGNDAC LOSI,POWEROFFJI,ACINPUT16V0116V029V019V02Figure4-14.FrameAssy,Schematic(ForusewithP.C.Bd.1540048-xx)J9,ACLINEACHIGNDACLOSI,POWERFlI

TlFigure4-16.FrameAssy,PartsLayoutPage4-15

Figure4-17.1541DiskController,Schematic(Sht.1of2)Page4-16

TABLEOFCONTENTSPara.TitlePageNo.FRONTMATTERTitlePageCopyrightPageWarningPageTableofContentsSection 1-INTRODUCTION1-1General1-11-2VIC-1541vs.15411-11-3

Figure4-18.1541DiskController,Schematic(Sht.2of2)Page4-17

Figure4-19.1541DiskController,PartsLayoutPage4-18

APPENDIXA

APPENDIXAFabricationofVideoDetectorMaterialsRequired:OnesetofmeterleadsOnecapacitor.oluF,50VOneresistorIK,10%,1/4WOnediode1N4148orequivalentEquipmenta

3.Prepareresistorasshownbelow:3/1613/16'4.Tinallleadsonresistor,diodeandmeterleadsAssembly:1.Slide11/2inchlengthof1/8inchheatshrinktubingontoredm

3.Slideheatshrinktubingover diode and resistor, leavingoneleadofresistorexposed,andthenshrinkthetubing.4.Soldercapacitorandblack meterleadsasshownbelo

APPENDIXB

SECTION1INTRODUCTION

APPENDIXBFabricationofTimingLightMaterialsRequired:OneneonbulbOnelampcordwithappropriateplugOneresistor22K/10%/l/4W(for115VAC)47K,10%,l/4W(for220VAC)E

3.Prepareneonlampasshownbelow:4.Tinallleadsonlampcord,resistorandneonlamp.Assembly:1.Slide1inchlengthsof1/8inchheatshrinktubingontoeachofthepreparedle

3.Slidebothpiecesofheatshrinktubingtowardthebaseoftheneonlampandthenshrinkthetubing.4.Slidea2inchlengthof3/16inchheatshrinktubingoverneonlamp.Position

-20ST#096-1301-31541MAINTBKVec'- -13-32-131-k.I'ABLEAbouttheAuthorMr.Peltierhasnineyearsprofessionalexperienceinelectronics,technicalwritin

Section1-INTRODUCTION1-1.GeneralThe1541MaintenanceGuideisproducedtogiveabrief,concisesourceofpertinentinformationnecessaryformaintenanceoftheVIC-1541a