Tektronix 2465B Bedienungsanleitung

ServiceManual

Tektronix

2465B& 2467B

Oscilloscopes

070-6863-01

Warning

Theservicinginstructionsareforusebyqualified

personnelonly.Toavoidpersonalinjury,donot

performanyservicingunlessyouarequalifiedto

doso.RefertotheSafetySummarypriorto

performingservice.

Pleasecheckforchangeinformationattherear

ofthismanual.

InstrumentSerialNumbers

EachinstrumentmanufacturedbyTektronixhasa serialnumberona panelinsertortag,orstampedonthe

chassis.Thefirstletterintheserialnumberdesignatesthecountryofmanufacture.Thelastfivedigitsofthe

serialnumberareassignedsequentiallyandareuniquetoeachinstrument.Thosemanufacturedinthe

UnitedStateshavesixuniquedigits.Thecountryofmanufactureisidentifiedasfollows:

B010000Tektronix,Inc.,Beaverton,Oregon,USA

E200000TektronixUnitedKingdom,Ltd.,London

J300000Sony/Tektronix,Japan

H700000TektronixHolland,NV,Heerenveen,TheNetherlands

InstrumentsmanufacturedforTektronixbyexternalvendorsoutsidetheUnitedStatesareassigneda twodigit

alphacodetoidentifythecountryofmanufacture

(e.g.,

JPforJapan,HKforHongKong,ILforIsrael,etc.).

Tektronix,Inc.,RO.Box500,Beaverton,OR97077

Printedin

U.S.A.

patents,issuedandpending.Thefollowingareregisteredtrademarks:TEKTRONIX,TEK,TEKPROBE,and

SCOPE-MOBILE.

WARRANTY

Tektronixwarrantsthatthisproductwillbefreefromdefectsinmaterialsandworkmanshipfora periodofthree(3)yearsfrom

thedateofshipment.Ifanysuchproductprovesdefectiveduringthiswarrantyperiod,Tektronix,atitsoption,eitherwillrepair

thedefectiveproductwithoutchargeforpartsandlabor,orwillprovidea replacementinexchangeforthedefectiveproduct.

Inordertoobtainserviceunderthiswarranty,CustomermustnotifyTektronixofthedefectbeforetheexpirationofthewarranty

periodandmakesuitablearrangementsfortheperformanceofservice.Customershallberesponsibleforpackagingand

shippingthedefectiveproducttotheservicecenterdesignatedbyTektronix,withshippingchargesprepaid.Tektronixshall

payforthereturnoftheproducttoCustomeriftheshipmentistoa locationwithinthecountryinwhichtheTektronixservice

centerislocated.Customershallberesponsibleforpayingallshippingcharges,duties,taxes,andanyotherchargesfor

productsreturnedtoanyotherlocations.

Thiswarrantyshallnotapplytoanydefect,failureordamagecausedbyimproperuseorimproperorinadequatemaintenance

andcare.Tektronixshallnotbeobligatedtofurnishserviceunderthiswarrantya)torepairdamageresultingfromattemptsby

personnelotherthanTektronixrepresentativestoinstall,repairorservicetheproduct;b)torepairdamageresultingfrom

improperuseorconnectiontoincompatibleequipment;orc)toservicea productthathasbeenmodifiedorintegratedwith

otherproductswhentheeffectofsuchmodificationorintegrationincreasesthetimeordifficultyofservicingtheproduct.

THISWARRANTYISGIVENBYTEKTRONIXWITHRESPECTTOTHISPRODUCTINLIEUOFANYOTHER

WARRANTIES,EXPRESSEDORIMPLIED.TEKTRONIXANDITSVENDORSDISCLAIMANYIMPLIEDWARRANTIESOF

MERCHANTABILITYORFITNESSFORA PARTICULARPURPOSE.TEKTRONIX'RESPONSIBILITYTOREPAIROR

REPLACEDEFECTIVEPRODUCTSISTHESOLEANDEXCLUSIVEREMEDYPROVIDEDTOTHECUSTOMERFOR

BREACHOFTHISWARRANTY.TEKTRONIXANDITSVENDORSWILLNOTBELIABLEFORANYINDIRECT,SPECIAL,

INCIDENTAL,ORCONSEQUENTIALDAMAGESIRRESPECTIVEOFWHETHERTEKTRONIXORTHEVENDORHAS

ADVANCENOTICEOFTHEPOSSIBILITYOFSUCHDAMAGES.

2465B/2467BService

TABLEOFCONTENTS

Page Page

SECTION1

SECTION2

LISTOFILLUSTRATIONSill

LISTOFTABLESiv

OPERATORSSAFETYSUMMARY....vi

SERVICINGSAFETYSUMMARYvii

SPECIFICATION

INTRODUCTION1-1

PERFORMANCECONDITIONS1-1

OPERATINGINFORMATION

SAFETY2-1

LINEVOLTAGESELECTION2-1

LINEFUSE2-1

POWERCORD2-1

INSTRUMENTCOOLING2-1

OPERATINGINFORMATION2-1

START-UP2-2

REPACKAGINGFORSHIPMENT..2-2

SECTION3 THEORYOFOPERATION

(SNB050000& ABOVE)

INTRODUCTION3a-1

SECTIONORGANIZATION3a-1

HYBRIDANDINTEGRATED

CIRCUITDESCRIPTIONS3a-1

BLOCKDIAGRAM3a-1

BLOCKDESCRIPTION3a-1

DETAILEDCIRCUITDESCRIPTION3a-5

INTRODUCTION3a-5

PROCESSORANDDIGITAL

CONTROL3a-5

FRONT-PANELSCANNINGand

ANALOGCONTROLS3a-9

FRONT-PANELCONTROLS3a-11

ATTENUATORSANDPREAMPS..3a-13

DISPLAYSEQUENCER,

TRIGGERS,ANDSWEEPS3a-17

VERTICALCHANNELSWITCH

ANDOUTPUTAMPLIFIERS3a-23

READOUT3a-27

HIGHVOLTAGEPOWERSUPPLY

ANDCRTFOR2465BONLY3a-35

HIGHVOLTAGEPOWERSUPPLY

ANDMCP-CRTFOR2467BONLY3a-40

LOWVOLTAGEPOWERSUPPLY.3a-46

LOW-VOLTAGEREGULATORS3a-51

POWERDISTRIBUTION3a-53

INTERCONNECTIONS3a-53

SECTION3 THEORYOFOPERATION

(SNB049999& BELOW)

INTRODUCTION3-1

SECTIONORGANIZATION3-1

HYBRIDANDINTEGRATED

CIRCUITDESCRIPTIONS3-1

BLOCKDIAGRAM3-1

BLOCKDESCRIPTION3-1

DETAILEDCIRCUITDESCRIPTION3-5

INTRODUCTION3-5

PROCESSORANDDIGITAL

CONTROL3-5

FRONT-PANELSCANNINGand

ANALOGCONTROLS3-9

FRONT-PANELCONTROLS3-11

ATTENUATORSANDPREAMPS..3-13

DISPLAYSEQUENCER,

TRIGGERS,ANDSWEEPS3-17

VERTICALCHANNELSWITCH

ANDOUTPUTAMPLIFIERS3-23

READOUT3-27

HIGHVOLTAGEPOWERSUPPLY

ANDCRTFOR2465BONLY3-35

HIGHVOLTAGEPOWERSUPPLY

ANDMCP-CRTFOR2467BONLY3-40

LOWVOLTAGEPOWERSUPPLY.3-46

LOW-VOLTAGEREGULATORS3-51

POWERDISTRIBUTION3-53

INTERCONNECTIONS3-53

SECTION4 PERFORMANCECHECKAND

FUNCTIONALVERIFICATION

INTRODUCTION4-1

PREPARATION4-1

VERTICAL4-4

TRIGGERING4-15

HORIZONTAL4-20

PARAMETRICMEASUREMENTS

CHECK4-27

COUNTER/TIMER/TRIGGER

CHECKS4-29

HORIZONTAL(cont)4-34

CALIBRATOR,EXTERNAL

Z-AXIS

ANDGATEOUTPUTS4-36

ADDITIONALFUNCTIONAL

VERIFICATION4-38

WORDRECOGNIZERCHECKS4-40

2465B/2467BService

TABLEOFCONTENTS(cont)

Page Page

SECTION5

SECTION6

ADJUSTMENTPROCEDURE

INTRODUCTION5-1

PARTIALPROCEDURE5-2

PREPARATIONFOR

ADJUSTMENT5-2

POWERSUPPLIESAND

DACREFADJUSTMENTS5-2

2467BCRTADJUSTMENTS5-4

2465BCRTADJUSTMENTS5-7

CH1 ANDCH2 INPUT

CAPACITANCE,AND

VERTICALREADOUTJITTER

ADJUSTMENTS5-10

AUTOMATICCALIBRATION

CONSTANTS,HORIZONTAL

ANDVERTICALGAIN,

CENTERING,ANDTRANSIENT

RESPONSEADJUSTMENTS5-13

CAL01—HORIZONTAL5-13

CAL02—VERTICAL5-16

CAL03—TRIGGERING5-18

CAL04—CH2 DELAY

ENABLE/DISABLE5-19

CAL05—SetHRSONand

PWRON/OFFCYCLES5-20

CAL06—VERTICAL

TRANSIENTRESPONSE5-20

CAL07—READOUTCENTERING

ANDGAIN5-22

CAL09—PARAMETRIC

MEASUREMENTS5-22

DYNAMICCENTERING,

DCBALANCE,AND

X-YPHASEDIFFERENTIAL

ADJUSTMENTS5-25

MAINTENANCE

STATIC-SENSITIVECOMPONENTS6-1

PREVENTIVEMAINTENANCE6-2

INTRODUCTION6-2

GENERALCARE6-2

INSPECTIONAND

CLEANING6-2

LUBRICATION6-4

SEMICONDUCTORCHECKS6-4

PERIODICREADJUSTMENT6-4

TROUBLESHOOTING6-5

INTRODUCTION6-5

TROUBLESHOOTINGAIDS6-5

TROUBLESHOOTING

EQUIPMENT6-7

SECTION7

SECTION8

TROUBLESHOOTING

TECHNIQUES6-7

DIAGNOSTICROUTINES6-10

CORRECTIVEMAINTENANCE6-20

INTRODUCTION6-20

MAINTENANCEPRECAUTIONS....6-20

OBTAININGREPLACEMENT

PARTS6-20

MAINTENANCEAIDS6-21

INTERCONNECTIONS6-21

TRANSISTORS,INTEGRATED

CIRCUITS,ANDHYBRID

CIRCUITS6-22

SOLDERINGTECHNIQUES6-22

REMOVALANDREPLACEMENT

INSTRUCTIONS6-24

OPTIONS

INTRODUCTION7-1

POWERCORDOPTIONS7-1

OPTION01(2465BONLY)7-1

OPTION1R7-1

OPTION057-2

OPTIONS06AND097-2

OPTION107-2

OPTION117-2

2465BREPLACEABLEELECTRICAL

PARTS

SECTION9 2467BREPLACEABLEELECTRICAL

PARTS

SECTION10DIAGRAMS

ACRONYMDICTIONARY

SECTION112465BREPLACEABLEMECHANICAL

PARTS

SECTION122467BREPLACEABLEMECHANICAL

PARTS

CHANGEINFORMATION

DiagnosticandTroubleshootingInformation:

DIAGNOSTICROUTINES6-10

TROUBLESHOOTINGCHARTSSECTION10

2465B/2467BService

LISTOFILLUSTRATIONS

FigurePage

1-12465BDimensionaldrawing1-22

1-22467BDimensionaldrawing1-23

2-1Lineselectorswitch,linefuse,anddetachablepowercord2-2

(ForSNB050000& Above)

3-1Instrumentblockdiagram3a-2

3-1Instrumentblockdiagram(cont)3a-3

3-2Addressdecoding3a-7

3-3Front-panelswitchmatrix3a-12

3-4Scaleilluminationcircuit3a-16

3-5Sweepgenerator3a-22

3-6Developingthereadoutdisplay3a-28

3-7Readoutdisplaypriorities3a-32

3-8TimingofRefreshPrioritizer3a-33

3-9Dcrestorercircuit(2465Bonly)3a-38

3-10Dcrestorercircuit(2467Bonly)3a-43

3-11TimingrelationshipsoftheInverterDrivesignals3a-48

3-12Simplifiedschematicofcontrolnetwork3a-49

(ForSNB049999& Below)

3-1Instrumentblockdiagram3-2

3-1Instrumentblockdiagram(cont)3-3

3-2Addressdecoding3-7

3-3Front-panelswitchmatrix3-12

3-4Scaleilluminationcircuit3-16

3-5Sweepgenerator3-22

3-6Developingthereadoutdisplay3-28

3-7Readoutdisplaypriorities3-32

3-8TimingofRefreshPrioritizer3-33

3-9Dcrestorercircuit(2465Bonly)3-38

3-10Dcrestorercircuit(2467Bonly)3-43

3-11TimingrelationshipsoftheInverterDrivesignals3-48

3-12Simplifiedschematicofcontrolnetwork3-49

6-1MultipinConnectorOrientation6-6

6-2RibbonCableRemoval6-26

6-3PowerSwitchPushButtonDisassembly6-31

10-1Colorcodesforresistorsandcapacitors.

10-2Semiconductorleadconfigurations.

10-3Locatingcomponentsonschemcaticdiagramsandcircuitboardillustrations.

10-4Instrumentblockdiagram.

10-5A5—Controlboard.

10-6A6—FrontPanelboard.

10-7A1—MainandA8—ScaleIlluminationboards.

10-8A15—Holdoffboard.

10-9A14—DynamicCenteringboard.

10-10A4—Readoutboard.

10-11A9—2467BHighVoltageboard.

10-12A9—2465BHighVoltageboard.

10-13A2—RegulatorandA3—Inverterboards.

2465B/2467BService

LISTOFTABLES

TablePage

1-12465B/2467B ElectricalCharacteristics1-2

1-2Option06(C/T/T)ElectricalCharacteristics1-13

1-3ResolutionSelections1-19

1-4ResolutionSelections1-19

1-5Option09(WR)ElectricalCharacteristics1-20

1-62465BMechanicalCharacteristics1-21

1-72467BMechanicalCharacteristics1-22

1-8EnvironmentalRequirements1-23

2-1PowerCordandVoltageData2-3

(ForSNB050000& Above)

3-1IntensityControl3a-19

3-2TriggerSourceSelection3a-21

3-3VerticalDisplaySelection3a-24

3-4HorizontalDisplaySelection3a-26

3-5BlankingandIntensityControlSelection3a-27

3-6ReadoutDisplayModeSelection3a-31

3-7OperationofPrioritizerShiftRegister3a-32

(ForSNB049999& Below)

3-1IntensityControl3-19

3-2TriggerSourceSelection3-21

3-3VerticalDisplaySelection3-24

3-4HorizontalDisplaySelection3-26

3-5BlankingandIntensityControlSelection3-27

3-6ReadoutDisplayModeSelection3-31

3-7OperationofPrioritizerShiftRegister3-32

4-1TestEquipmentRequired4-2

4-2AccuracyLimits4-7

4-3AccuracyLimits4-9

4-4CH3 andCH4 AccuracyLimits4-11

4-5CH1 orCH2 TriggeringConditions4-16

4-6CH3 orCH4 TriggeringConditions4-17

4-7SettingsforA andB TimingAccuracyChecks4-22

4-8HorizontalTimingAccuracyCheckedAgainsttheGraticule4-23

4-9DeltaTimeDisplayAccuracy4-25

4-10DelayedSweepDeltaTimeAccuracy4-26

4-11ParametricMeasurementPeriodChecks4-27

4-12ParametricMeasurementVoltsChecks4-28

4-13DataSetupTimeChecks4-41

4-14DataHoldTimeChecks4-42

4-15MinimumClockPulseWidthChecks4-42

4-16DelayFromSelectedEdgetoWORDRECOGOUTChecks4-43

4-17WordRecognitionDelay4-43

5-1PowerSupplyVoltage andRippleTolerances5-3

5-2HorizontalTiming5-15

5-3HorizontalTiming5-16

5-4VerticalCalibrationSignals5-17

5-5VerticalCalibrationSignals5-17

5-6ParametricMeasurementCalibration5-23

2465B/2467BService

LISTOFTABLES(cont)

1SusceptibilitytoStaticDischargeDamage6-1

2ExternalInspectionCheckList6-2

3InternalInspectionCheckList6-3

4SequenceofDiagnosticTests6-11

5SequenceofExerciserRoutines6-13

6KernelTestFailureCodes6-13

7Front-PanelLEDOptionCodes6-13

8Front-PanelLEDDeviceCodes6-14

9PotentiometerCodesandValues(Exerciser01)6-16

10PotsandSwitchesColumn6-17

11NOPTestData6-19

12MaintenanceAids6-21

2465B/2467BService

OPERATORSSAFETYSUMMARY

The general safety information in this part of the summary is for both operating and servicing personnel.

Specific warnings and cautions will be found throughout the manual where they apply and do not appear in this

summary.

TermsinThisManual

CAUTIONstatementsidentifyconditionsorpracticesthat

couldresultindamagetotheequipmentorotherproperty.

WARNINGstatementsidentifyconditionsorpracticesthat

couldresultinpersonalinjuryorlossoflife.

TermsasMarkedonEquipment

CAUTIONindicatesa personalinjuryhazardnotimmedi-

atelyaccessibleasonereadsthemarkings,ora hazardto

property,includingtheequipmentitself.

DANGERindicatesa personalinjuryhazardimmediately

accessibleasonereadsthemarking.

SymbolsinThisManual

A Thissymbolindicateswhereapplicable

cau-

tionaryorotherinformationistobefound.For

maximuminputvoltageseeTable1-1.

SymbolsasMarkedonEquipment

GroundingtheProduct

Thisproductisgroundedthroughthegroundingconductor

ofthepower

cord.

Toavoidelectricalshock,plugthe

powercordintoa properlywiredreceptaclebeforemaking

anyconnectionstotheproductinputoroutputterminals.

Aprotectivegroundconnectionbywayofthegrounding

conductorinthepowercordisessentialforsafeoperation.

DangerArisingfromLossofGround

Uponlossoftheprotective-ground connection,allaccessi-

bleconductiveparts(includingknobsandcontrolsthat

mayappeartobeinsulated)canrenderanelectricshock.

UsetheProperPowerCord

Useonlythepowercordandconnectorspecifiedforyour

product.

Useonlya powercordthatisingoodcondition.

Fordetailedinformationonpowercordsandconnectors,

seeTable2-1.

DANGER— Highvoltage.

Protectiveground(earth)terminal.

UsetheProperFuse

Toavoidfirehazard,useonlya fuseofthecorrecttype,

voltageratingandcurrentratingasspecifiedintheparts

listforyourproduct.

A ATTENTION— Refertomanual.

PowerSource

Thisproductisintendedtooperate froma powersource

thatwillnotapplymorethan250voltsrmsbetweenthe

supplyconductorsorbetweeneithersupplyconductorand

ground.

A protectivegroundconnectionbywayofthe

groundingconductorinthepowercordisessentialforsafe

operation.

DoNotOperateinExplosiveAtmospheres

Toavoidexplosion,donotoperate thisinstrumentinan

explosiveatmosphereunlessithasbeenspecifically

certifiedforsuchoperation.

DoNotRemoveCoversorPanels

Toavoidpersonalinjury,donotremovetheproductcov-

ersorpanels.Donotoperate theinstrumentwithoutthe

coversandpanelsproperlyinstalled.

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