HP 5890 Series II GC Service Manual (05890-90320) …

1 , (PCOC) (EPC) (MPC) (EFS) (TCD) (FID) (NPD) (Toroid) (ECD) (ECD)(19233A/19235 AVERSIONS) (19233A/19235 AVersions) (G1223A/G1224 AVERSIONS) (G1223A/G1224 AVersions) (ECDCellWeldment)(G1223A/G1224 AVersions) (FPD) (PMT) ,Detector, ` ` `Remove/ReplaceSplit- ` ` ` ` `Remove/ReplaceECD(19233A/19235 AVERSIONS) `Remove/ReplaceECD(G1223A/G1224 AVERSIONS) ` (Cryo-Blast) (GPVs) (LSVs) Global and Local , ,byusingthegeneraltroubleshootingtechniq uespresentedhere,alongwiththefunc-tional diagramsfoundattheendofthissection, , ,detectors,and/ortheflow/pressuresystems ,foldoutthepagecorrespondingtotheemploye ddetector, ,replace,and/orcleanvarioussubassemblies ,basedonthecurrentmaintenancephilosophy, , , ,whichaccompanythevariousoptions,existfo rjustthispurpose, , , (generallywhenfirstturnedon)doesn tworkatall.

2 (NON-FUNCTIONINGINSTRUMENT) sextensiveautomonitoringsystem.(AUTOMONI TORMESSAGES) (OPERATORINSTIGATEDINDICATIONS)PartDcont ainssymptoms(otherthanthosethatappearont hevisualdisplay) ,thesetypesofsymptomscanbeassociatedwith aspecificfunctionalareaoftheinstrument.( FUNCTIONALSYMPTOMS)ElectricalSafetyPreca utionsInallnonelectricallyorientedsectio nsofthismanual, ,thissection,aswellasmostofServiceSectio n,requiresthatsomeelectricalmeasurements bemadeonactive(energized) `Thefollowingstepsrequireprotectionagain stESD(Electro-StaticDischarge).Useagroun dedwriststrap( ,or9300-0970-small) `WhenstoringorinbetweenhandlingofPCBs(Pr intedCircuitBoards), , ( ,messages) , ,ontherareoccasionthatpowerisbeingprovid ed,buttheinstrumentisnotworking, , ,aproblemintheinstrument ,plustheuseofIPB, (PowerOnSequence).

3 ,anopenedfusemayhavebeencausedbyashorton etimesurge;how-ever, , , ,(F1)ortwoinasplitphasecircuit(F3&F4), (F2)ortwoinasplitphasecircuit(F1&F2)prot ectsthemainpowertransformer.( ) (+5,+10,+15,-15,+24,-24).Fusesprotectthe 3 VACsecondarythatisusedforFIDignitor(F1)a ndelectronicflowsensorvoltages(F2).SVC1- 4 PowerOnSequenceAslongascorrectLineVoltag eisprovidedtotheinstrument,thefollowinge ventsshouldoccurwhentheinstrument (T1)primarywindingisenergized(fusedbyF2o nACBoardorF1&F2ifsplitphase).(RefertoSec tion9oftheIPBportionofthisdocumentformai nPCBinformation.)Thethreesecondarywindin gs(3 VAC,40 VAC,and120 VAC) (RefertoappendixAofthisdocumentforallcon nectorinformation.)

4 The40 VACisrectifiedanddividedtoproduce+24 VDCand+ ,the+10 VDC,the+5 VDC,andtheMasterOscillator(forclocks) ,the(POWERONPULSE)andtheCPUportionofthec ircuitrybegintoinitialize,firstthemselve s, (zonepowerrelay)ontheMainBoardandthesign alforK1(ovencontactor) (undersoftwarecontrol) , (dependingupontheirseriousness)eitheratt hetimethattheproblemoccursorintheinstrum ent :FATALERR:H2 ALARM-FAULT:WARN: :EPP&FLOWI ndicatesElectronicPressureControl(EPC)an dElectronicFlowSen-sor(EFS) :>!25 MSindicatesthatthe40 Hztaskcouldn tcompletewithin! ;however, :RUNCNTL indicatesthattheRunControltaskcouldn ;however, :messagelistingabove, ,theCPU(Z80) , ,troubleshoottheproportionalcontrolvalve , ,troubleshoottheproportionalcontrolvalve , , +5%and-10% (F3) :OVEN>MAX+ (asanyFAULT messageregardingatem-peratureproblem) ;ifthedisplayindicatesthattheactualvalve isabove800degreesC,mostlikelytheovensens orisopen(althoughitcouldbesomecompo-nent inthesensingcircuit).

5 Iftheactualvalueoftheoventemperatureseem sreasonable, :(ZONENAME)TEMPRDG wheretheZONENAME couldbeOVEN,INJA,INJB,DETA,DETB, (oroven) :(OUTPUTNAME)TEST wheretheOUTPUTNAME couldbeDAC1,DAC2,ATTN1, , ,ifonlythistestmes-sageappears, ;whereastheDAC1orATTN1indi- , , ,theinstru-mentwillrollthroughallofitsNo tReadystates(whichincludeallFAULTs). ,thismessageiscausedbyafaultymicroproces sor(CPU) : , , ,afternotingthecurrentlydisplayedmes-sag e,istoswitchthepowerlineswitchoftheinstr umentoff, , ((eitheratpowerturn-onorthroughtheCaliba ndTest(ClearDot)Modes)), ,theinstru-mentremainsfullyoperational, (seeSec-tion13ofthismanual),byRAMreplace ment, , ,suspecttheboards,theI/Osection, :OVENSHUTOFF messageissomewhatofahybridbetweenotherWA RN: :messages,theWARN:OVENSHUTOFF messageoccursmostoftenasaresultofinopera tivehardware(ratherthansoftware).

6 ,differentfromotherWARN:(similartoFAULT: )messages, ,orthatalargethermalleakfromtheovenhasoc curred(makesurethattheovendoorisshut).On cetheWARN:OVENSHUTOFF isdisplayed, (ClearDot) , (ClearDot), (ClearDot)modes,press:theClearkey, ,5,7,8, :CLEARDOT4 DISPLAYMEMORYCLEARDOT5 SELFTESTCLEARDOT7 HPILLOOPBACKTESTCLEARDOT8 SETPIDCONTROLSCLEARDOT9 DISPTEMP&DEMANDT oescapefromanyoftheCALIBANDTEST(ClearDot ) (ClearDot4)DisplayMemoryThisdiagnosticro utineisinitiatedfromthekeyboardbypressin g:Uponenteringthismode,asinglememoryaddr ess(ADDR:)andavalue(VAL:) , ,thevaluedisplayedistwobytes(fourdigits) (onebyte) ,ifaddress1111werekeyedinandthevalueF224 resulted.

7 ThentheF2wouldbecomethetworightmostdigit s( ,3DF2).IntheDisplayMemorymode, , ,andonlythatvalue(onebyte), (onebyteinbinary)isdesired,simplyincreme nttheaddress, , (ClearDot5)SelfTestThisinstrumenttestise xactlythesameastheonethatoccursautomatic allyatpowerturnon, :Thefirstindica-tionauserhasthattheinstr umentisworkingiswhentheunittestsitsRAM(R andomAccessMemory) (allpossibledots) ,theunittestsmostoftheprocessormemory(RO M) , ( ,temperaturesensors)areNOTtestedatthisti me; ,bylinkingtheA/DthroughtheCPUtotheD/Aand byloopingtheD/AoutputbackasaninputtotheA /D,mostoftheMainBoard (andunlessanerrorisfound,thefinal) , ,withitsresultingmessage, (ClearDot7) :Byenteringthistest, ,thesamewordshouldbetransmittedbacktothe Z80processor, ,aPASSEDSELF-TEST messagewillbedisplayedontheinstrument ,orifeithertheInterfaceBoardorHPILC ableisnotproperlyinstalled, , (ClearDot8)SetPIDC ontrolsCalibandTest(ClearDot9)DispTemp& (or2) (or2)asecondtimedisplaysthecurrentsignal levelvalue( ).

8 ,whichispermanentlystoredintheHP5890 SERIESII, ,withthefirst(tallest)peakhavingaheightv alueofabout125mVat=0(+1 Vanalogoutput); (lostsampleduetoleaks,noiseduetoadirtyde tector,etc.),versusproblemseitherwiththe integrating/recordingdeviceitself, ,achromato-graphicproblemislikelytoexist ;ifthetestchromatogramexhibitsnoise,ordo esnotappearatall, (otherthanthosethatappearonthevisualdisp lay) , (shouldbeabout200-220ohms).Withthepowerr emovedthiscanbemeasuredbyremovingtheJ9co nnectorforINJA,INJB,DETA, (seetemperaturesensorresistancechart), , ( ,ovenat-50degreesC,injectionportat100deg reesC).

9 , ,sinceboardormodulereplacementconstitute sthemajorityofelectronicrepairs, ,theKeyboardandDisplayBoard(usuallydonea sonemodule), ,theMainBoardcontainsmostoftheinstrument ,CPU,A/Dconverter,D/Acon-verter,clocksan dgeneralcontrolcircuits.(RefertothemainP CBdiagrams,pagesSVC1-12andSVC1-13.) sontheoriginal05890-60010boardSVC1-12 Connectors1thru15areusedtoconnecttheMain Boardeitherwiththeotherelectronicassembl ieswithintheinstrumentorexternaldevices, suchasanintegrator.(RefertothemainPCBdia grams, )SVC1-13 DCPOWERSUPPLYPROCESSORCLOCKSANDTIMINGKEY BOARDDETECTORSDACA/DVALVESANDCRYOHEATEDZ ONESANDTRIACSMAINPCBFUNCTIONALZONESACPOW ERSUPPLYTESTPOINTSTESTPOINTSSVC1-14 MAINPCBKEYBOARDANDDISPLAYDETECTORAPCBPRE SSURECONTROLPCBCOMMUNICATIONSPCBELECTRON ICFLOWSENSORP1P2P3P13P12P11P4P5P6P7P8F15 A250VF35A250VF25A250VF4,F55A250 VVALVEPCBCRYO&4 HEATEDZONES5thHEATEDZONE&VALVE1&2 TRANSFORMERMAINSWITCHACPCBOVENTRIACOVENH EATEROVENFANMOTORJ1J2 DETECTORBPCBJ2J1J12J1J1 ANALOGSIGNAL1 OUTPUTANALOGSIGNAL2 OUTPUTREMOTESTART/STOPZONETEMPSENSORS&IN JECTIONPORTFANOVENFLAPSTEPPERMOTOR.

10 IGNITOR,VLVA,VLVBP10J14J9 LINECORDSVC2-1 Section2 INLETCOMPONENTSREPLACINGINLETCOMPONENTST herearefiveinletoptionsavailablefortheHP 5890 SeriesIIGasChromatograph;packedcolumn,pa ckedcolumnwithseptumpurge,split/splitles scapillary,split-onlycapillary,andProgra mmableCoolOn-Columncapillary(PCOC). ,replace,and/orcleanvarioussubassemblies ,basedonthecurrentmaintenancephilosophy, , ,refertoSection5oftheIPBportionofthisdoc ument(InletComponents). ,refertoSection6oftheserviceportionofthi sdocument(ZoneTem-perature). , (PCOC) , (s)toberemoved,in-sidethecolumnoven,remo vethecolumnandhardwareassociatedwiththei nlet(s)(liner,column/linernuts,ferrules, makeupgasadapt-er,etc.)