
MonoLaserMFP
ProXpressM337x/M387x/407x
series
(Ver1.3)
MANUAL
SERVICE
MonoLaserMFP
1.Precautions
2.ProductSpecications
3.DisassemblyandReassembly
4.AlignmentandTroubleshooting
5.SystemDiagram
6.ReferenceInformation
Contents
RefertotheservicemanualintheGSPN(seetherearcover)formoreinformation.

Contents
Contents
1.Precautions......................................................................................................................................1−1
1.1.Safetywarning........................................................................................................................1−1
1.2.Cautionforsafety....................................................................................................................1−2
1.2.1.Toxicmaterial.............................................................................................................1−2
1.2.2.Electricshockandresafetyprecautions.........................................................................1−2
1.2.3.Handlingprecautions...................................................................................................1−4
1.2.4.AssemblyandDisassemblyprecautions...........................................................................1−4
1.2.5.Disregardingthiswarningmaycausebodilyinjury............................................................1−5
1.3.ESDprecautions......................................................................................................................1−6
2.ProductSpecications........................................................................................................................2−1
2.1.Specications..........................................................................................................................2−1
2.1.1.ProductOverview........................................................................................................2−1
2.1.2.Specications.............................................................................................................2−2
2.1.2.1.General.......................................................................................................2−2
2.1.2.2.Print...........................................................................................................2−3
2.1.2.3.Copier.........................................................................................................2−4
2.1.2.4.Scanner.......................................................................................................2−5
2.1.2.5.Fax.............................................................................................................2−6
2.1.2.6.ControllerandSoftware..................................................................................2−7
2.1.2.7.PaperHandling.............................................................................................2−9
2.1.2.8.Consumables................................................................................................2−11
2.1.2.9.MaintenancePart..........................................................................................2−12
2.2.ProductDescription..................................................................................................................2−13
2.2.1.FrontView.................................................................................................................2−13
2.2.2.RearView..................................................................................................................2−15
2.2.3.PaperPath..................................................................................................................2−16
2.2.4.Systemlayout.............................................................................................................2−17
2.2.4.1.FeedingPart.................................................................................................2−18
2.2.4.2.ImageCreation.............................................................................................2−20
2.2.4.3.Fuserunit....................................................................................................2−22
2.2.4.4.LSU(LaserScanningUnit).............................................................................2−23
2.2.4.5.DriveUnit...................................................................................................2−24
2.2.5.Hardwareconguration................................................................................................2−25
2.2.5.1.MainController(M337x_M387x_M407xFR_M4072FD).....................................2−28
2.2.5.2.MainController(M407xFX)...........................................................................2−31
2.2.5.3.OPEController.............................................................................................2−33
2.2.5.4.SO-DIMMPBA............................................................................................2−34
2.2.5.5.WLAN(M387xFWmodelonly).......................................................................2−34
iCopyright©1995-2013SAMSUNG.Allrightsreserved.

Contents
2.2.5.6.ADFandRADFSUBPBA.............................................................................2−35
2.2.5.7.SCFPBA-Optional......................................................................................2−35
2.2.5.8.CRUMPBA.................................................................................................2−36
2.2.5.9.FaxBoard....................................................................................................2−37
2.2.5.10.SMPSBoard................................................................................................2−38
2.2.5.11.HVPSboard.................................................................................................2−39
2.2.6.EngineFirmwareControlAlgorithm...............................................................................2−40
2.2.6.1.Feeding.......................................................................................................2−40
2.2.6.2.Transfer.......................................................................................................2−40
2.2.6.3.Fusing.........................................................................................................2−41
2.2.6.4.LSU............................................................................................................2−41
2.2.7.SoftwareDescriptions..................................................................................................2−42
2.2.7.1.Softwaresystemoverview..............................................................................2−42
2.2.7.2.Architecture.................................................................................................2−42
2.2.7.3.DataandControlFlow...................................................................................2−43
3.DisassemblyandReassembly..............................................................................................................3−1
3.1.Precautionswhenreplacingparts................................................................................................3−1
3.1.1.Precautionswhenassemblinganddisassembling...............................................................3−1
3.1.2.PrecautionswhenhandlingPBA.....................................................................................3−1
3.1.3.ReleasingPlasticLatches..............................................................................................3−2
3.2.Screwsusedintheprinter..........................................................................................................3−3
3.3.ReplacingtheMainSVCparts...................................................................................................3−5
3.3.1.LeftandRightCover....................................................................................................3−5
3.3.2.FrontCover................................................................................................................3−6
3.3.3.ADForRADFUnit.....................................................................................................3−7
3.3.4.OPEUnit...................................................................................................................3−8
3.3.5.PlatenUnit.................................................................................................................3−9
3.3.6.Top-MiddleCover.......................................................................................................3−10
3.3.7.FaxBoard..................................................................................................................3−11
3.3.8.MiddleandInnerCover................................................................................................3−12
3.3.9.MainBoard................................................................................................................3−13
3.3.10.HVPSboard...............................................................................................................3−13
3.3.11.SMPSBoard...............................................................................................................3−14
3.3.12.LaserScanningUnit(LSU)...........................................................................................3−14
3.3.13.FuserUnit..................................................................................................................3−15
3.3.14.MainDriveUnit..........................................................................................................3−16
3.3.15.FeedDriveUnit..........................................................................................................3−17
3.3.16.PickUp_Regi_MPClutch.............................................................................................3−17
3.3.17.Pick-UpRoller............................................................................................................3−18
3.3.18.TransferRoller............................................................................................................3−19
Copyright©1995-2013SAMSUNG.Allrightsreserved.ii

Contents
3.3.19.MPUnit....................................................................................................................3−20
3.3.20.Bin-fullsensor............................................................................................................3−20
3.3.21.Regi_Feed_EmptySensor.............................................................................................3−21
3.3.22.ReverseRoller...........................................................................................................3−22
3.3.23.SCF(SecondCassetteFeeder)Unit.................................................................................3−23
3.3.23.1.SCFRightCover...........................................................................................3−23
3.3.23.2.SCFMainBoard...........................................................................................3−23
3.3.23.3.SCFMainMotor...........................................................................................3−24
3.3.23.4.SCFClutch..................................................................................................3−24
3.3.23.5.SCFpickup_forwardroller.............................................................................3−25
3.3.23.6.SCFReverseRoller.......................................................................................3−25
3.3.23.7.SCFMainDriveUnit.....................................................................................3−26
3.3.23.8.SCFLiftAssy...............................................................................................3−26
3.3.23.9.SCFPick-UpUnit.........................................................................................3−27
3.3.23.10.SCFPick-Up_Empty_FeedSensor...................................................................3−28
4.AlignmentandTroubleshooting...........................................................................................................4−1
4.1.AlignmentandAdjustments.......................................................................................................4−1
4.1.1.ControlPanel..............................................................................................................4−1
4.1.2.UnderstandingTheStatusLED......................................................................................4−4
4.1.3.ClearingJams.............................................................................................................4−6
4.1.3.1.Clearingoriginaldocumentjams......................................................................4−6
4.1.3.2.Clearingpaperjams.......................................................................................4−10
4.1.4.Usefulmenuitemforservice.........................................................................................4−18
4.1.5.PeriodicDefectiveImage..............................................................................................4−20
4.1.6.Usefulmanagementtools..............................................................................................4−21
4.1.6.1.UsingSamsungEasyPrinterManager...............................................................4−21
4.1.6.2.UsingSamsungPrinterStatus(Windowsonly)...................................................4−24
4.1.6.3.UsingSyncThruWebService(SWS)................................................................4−25
4.1.7.UpdatingFirmware......................................................................................................4−27
4.1.7.1.UpdatethermwarebyusingtheUSBport........................................................4−27
4.1.7.2.Updatethermwarebyusingthenetwork..........................................................4−28
4.1.8.TechMode.................................................................................................................4−30
4.1.8.1.EnteringtheTechMode..................................................................................4−30
4.1.8.2.TechModeMenu..........................................................................................4−31
4.1.8.3.TechModeMenudescription...........................................................................4−32
4.2.Troubleshooting......................................................................................................................4−37
4.2.1.Procedureofcheckingthesymptoms...............................................................................4−37
4.2.1.1.BasicCheckList...........................................................................................4−38
4.2.2.ErrorCodeandTroubleshooting.....................................................................................4−39
4.2.3.Imagequalityproblem..................................................................................................4−70
iiiCopyright©1995-2013SAMSUNG.Allrightsreserved.

Contents
4.2.4.Othererrors................................................................................................................4−76
5.SystemDiagram................................................................................................................................5−1
5.1.BlockDiagram(M337xFD_M387xFD_M387xFW_M407xFR_M4072FD)........................................5−1
5.2.BlockDiagram(M407xFX).......................................................................................................5−2
5.3.ConnectionDiagram(M337xFD_M387xFD_M387xFW_M407xFR_M4072FD).................................5−3
5.4.ConnectionDiagram(M407xFX)................................................................................................5−4
6.ReferenceInformation........................................................................................................................6−1
6.1.ToolforTroubleshooting...........................................................................................................6−1
6.2.Glossary.................................................................................................................................6−2
6.3.TheSamplePatternfortheT est..................................................................................................6−8
6.4.ModelNameandCode.............................................................................................................6−9
6.5.RevisionHistory......................................................................................................................6−10
Copyright©1995-2013SAMSUNG.Allrightsreserved.iv

1.Precautions
1.Precautions
Inordertopreventaccidentsanddamagestotheequipmentpleasereadtheprecautionslistedbelowcarefullybefore
servicingtheproductandfollowthemclosely .
1.1.Safetywarning
1)Onlytobeservicedbyafactorytrainedservicetechnician.
Highvoltagesandlasersinsidethisproductaredangerous.Thisproductshouldonlybeservicedbyafactorytrained
servicetechnician.
2)UseonlySamsungreplacementparts.
Therearenouserserviceablepartsinsidetheproduct.Donotmakeanyunauthorizedchangesoradditionstothe
productasthesecouldcausetheproducttomalfunctionsandcreateanelectricshocksorrehazards.
3)LaserSafetyStatement
TheprinteriscertiedintheU.S.toconformtotherequirementsofDHHS21CFR,chapter1SubchapterJfor
ClassI(1)laserproducts,andelsewhereiscertiedasaClassIlaserproductconformingtotherequirementsofIEC
60825-1.ClassIlaserproductsarenotconsideredtobehazardous.Thelasersystemandprinteraredesignedso
thereisneveranyhumanaccesstolaserradiationaboveaClassIlevelduringnormaloperation,usermaintenance
orprescribedservicecondition.
•Wavelength:800nm
•Beamdivergence
-Paraller:11degrees
-Perpendicular:35degrees
•Maximumpowerofenergyoutput:12mW
WARNING
NeveroperateorservicetheproductwiththeprotectivecoverremovedfromLaser/Scannerassembly.Thereected
beam,althoughinvisible,candamageyoureyes.
Whenusingthisproduct,thesebasicsafetyprecautionsshouldalwaysbefollowedtoreduceriskofre,electric
shock,andpersonalinjury.
4)Lithiumbatterynotreplaceablebyuser
1-1Copyright©1995-2013SAMSUNG.Allrightsreserved.

1.Precautions
1.2.Cautionforsafety
1.2.1.Toxicmaterial
Thisproductcontainstoxicmaterialsthatcouldcauseillnessifingested.
1)Pleasekeepimagingunitandtonercartridgeawayfromchildren.Thetonerpowdercontainedintheimagingunitand
tonercartridgemaybeharmful,andifswallowed,youshouldcontactadoctor.
1.2.2.Electricshockandresafetyprecautions
Failuretofollowthefollowinginstructionscouldcauseelectricshockorpotentiallycauseare.
1)Useonlythecorrectvoltage,failuretodosocoulddamagetheproductandpotentiallycauseareorelectricshock.
2)Useonlythepowercablesuppliedwiththeproduct.Useofanincorrectlyspeciedcablecouldcausethecableto
overheatandpotentiallycauseare.
3)Donotoverloadthepowersocket,thiscouldleadtooverheatingofthecablesinsidethewallandcouldleadtoare.
4)Donotallowwaterorotherliquidstospillintotheproduct,thiscancauseelectricshock.Donotallowpaperclips,pins
orotherforeignobjectstofallintotheproduct,thesecouldcauseashortcircuitleadingtoanelectricshockorrehazard.
5)Nevertouchtheplugsoneitherendofthepowercablewithwethands,thiscancauseelectricshock.Whenservicing
theproduct,removethepowerplugfromthewallsocket.
6)Usecautionwheninsertingorremovingthepowercord.Whenremovingthepowercord,gripitrmlyandpull.The
powercordmustbeinsertedcompletely,otherwiseapoorcontactcouldcauseoverheatingleadingtoare.
7)Takecareofthepowercable.Donotallowittobecometwisted,bentsharplyaroundcornersorpowercablemaybe
damaged.Donotplaceobjectsontopofthepowercable.Ifthepowercableisdamageditcouldoverheatandcausea
re.Exposedcablescouldcauseanelectricshock.Replacethedamagedpowercableimmediately,donotreuseor
repairthedamagedcable.Somechemicalscanattackthecoatingonthepowercable,weakeningthecoverorexposing
cablescausingreandshockrisks.
Copyright©1995-2013SAMSUNG.Allrightsreserved.1-2

1.Precautions
8)Ensurethatthepowersocketsandplugsarenotcrackedorbrokeninanyway.Anysuchdefectsshouldberepaired
immediately.T akecarenottocutordamagethepowercableorplugswhenmovingthemachine.
9)Usecautionduringthunderorlightningstorms.Samsungrecommendsthatthismachinebedisconnectedfromthe
powersourcewhensuchweatherconditionsareexpected.Donottouchthemachineorthepowercordifitisstill
connectedtothewallsocketintheseweatherconditions.
10)A voiddampordustyareas,installtheproductinacleanwellventilatedlocation.Donotpositionthemachineneara
humidierorinfrontofanairconditioner.Moistureanddustbuiltupinsidethemachinecanleadtooverheatingand
causeareorcausepartstorust.
11)Donotpositiontheproductindirectsunlight.Thiswillcausethetemperatureinsidetheproducttorisepossiblyleading
totheproductfailingtoworkproperlyandinextremeconditionscouldleadtoare.
12)Donotinsertanymetalobjectsintothemachinethroughtheventilatorfanorotherpartofthecasing,itcouldmake
contactwithahighvoltageconductorinsidethemachineandcauseanelectricshock.
13)WhenreplacingtheSMPSboard,pleasewait5minutesafterunpluggingthepowercord,thenreplaceit.Y ou
cangetashockbytheelectricdischarge.
1-3Copyright©1995-2013SAMSUNG.Allrightsreserved.

1.Precautions
1.2.3.Handlingprecautions
Thefollowinginstructionsareforyourownpersonalsafetytoavoidinjuryandsoasnottodamagetheproduct.
1)Ensuretheproductisinstalledonalevelsurface,capableofsupportingitsweight.Failuretodosocouldcause
theproducttotiporfall.
2)Theproductcontainsmanyrollers,gearsandfans.T akegreatcaretoensurethatyoudonotcatchyourngers,hairor
clothinginanyoftheserotatingdevices.
3)Donotplaceanysmallmetalobjects,containersofwater,chemicalsorotherliquidsclosetotheproductwhichifspilled
couldgetintothemachineandcausedamageorashockorrehazard.
4)Donotinstallthemachineinareaswithhighdustormoisturelevels,besideonopenwindoworclosetoahumidieror
heater.Damagecouldbecausedtotheproductinsuchareas.
5)Donotplacecandles,burningcigarettes,etcontheproduct,Thesecouldcauseare.
6)Ensurethatthemachineisinstalledandusedinproperareatomeetthetemperatureandhumidityspecications.
•IfthemachineisstoredatbelowzeroCelsiusforalongtime,donotusethemachineinstantlyaftermovement.It
canmalfunction.Takecareofthemachinestorage.IfthemachineisstoredatbelowzeroCelsiusforalongtime,
keepthemachineatroomtemperatureandinstallit.
1.2.4.AssemblyandDisassemblyprecautions
1)ReplacepartscarefullyandalwaysuseSamsungparts.T akecaretonotetheexactlocationofpartsandalsocable
routingbeforedismantlinganypartofthemachine.Ensureallpartsandcablesarereplacedcorrectly.Pleasecarryout
thefollowingproceduresbeforedismantlingtheproductorreplacinganyparts.
2)Ensurethatpowerisdisconnectedbeforeservicingorreplacinganyelectricalparts.
3)Disconnectinterfacecablesandpowercables.
4)Onlyuseapprovedspareparts.Ensurethatpartnumber,productname,anyvoltage,currentortemperaturerating
arecorrect.
5)Whenremovingorre-ttinganypartsdonotuseexcessiveforce,especiallywhenttingscrewsintoplastic.
6)Takecarenottodropanysmallpartsintothemachine.
7)HandlingoftheOPCDrum
•TheOPCDrumcanbeirreparablydamagedifitexposedtolight.TakecarenottoexposetheOPCDrumeither
todirectsunlightortouorescentorincandescentroomlighting.Exposureforaslittleas5minutescandamage
thesurfaceofthephotoconductivepropertiesandwillresultinprintqualitydegradation.T akeextracarewhen
servicingtheproduct.RemovetheOPCDrumandstoreitinablackbagorotherlightproofcontainer .T ake
carewhenworkingwiththeCovers(especiallythetopcover)openaslightisadmittedtotheOPCareaandcan
damagetheOPCDrum.
•TakecarenottoscratchthegreensurfaceofOPCDrumUnit.IfthegreensurfaceoftheDrumCartridgeis
scratchedortouchedtheprintqualitywillbecompromised.
Copyright©1995-2013SAMSUNG.Allrightsreserved.1-4

1.Precautions
1.2.5.Disregardingthiswarningmaycausebodilyinjury
1)Becarefulwiththehightemperaturepart.
Thefuserunitworksatahightemperature.Usecautionwhenworkingontheprinter.W aitforthefuserunitto
cooldownbeforedisassembly.
2)Donotputngersorhairintotherotatingparts.
Whenoperatingaprinter,donotputhandorhairintotherotatingparts(Paperfeedingentrance,motor,fan,etc.).
Ifdo,youcangetharm.
3)Whenyoumovetheprinter,usesafeliftingandhandlingtechniques.
Thisprinterisheavy .Usetheliftinghandleslocatedoneachsideofthemachine.Backinjurycouldbecausedif
youdonotliftcarefully .
4)Ensuretheprinterisinstalledsafely .
Ensuretheprinterisinstalledonalevelsurface,capableofsupportingitsweight.Failuretodosocouldcausethe
printertotiporfallpossiblycausingpersonalinjuryordamagingtheprinter.
5)Donotinstalltheprinteronaslopingorunstablesurface.Afterinstallation,doublecheckthattheprinterisstable.
1-5Copyright©1995-2013SAMSUNG.Allrightsreserved.

1.Precautions
1.3.ESDprecautions
Certainsemiconductordevicescanbeeasilydamagedbystaticelectricity.Suchcomponentsarecommonlycalled
“ElectrostaticallySensitive(ES)Devices”orESDs.ExamplesoftypicalESDsare:integratedcircuits,someeldeffect
transistors,andsemiconductor“chip”components.Thetechniquesoutlinedbelowshouldbefollowedtohelpreducethe
incidenceofcomponentdamagecausedbystaticelectricity.
CAUTION
Besurenopowerisappliedtothechassisorcircuit,andobserveallothersafetyprecautions.
1)Immediatelybeforehandlingasemiconductorcomponentorsemiconductor-equippedassembly,drainoffany
electrostaticchargeonyourbodybytouchingaknownearthground.Alternatively,employacommerciallyavailable
wriststrapdevice,whichshouldberemovedforyourpersonalsafetyreasonspriortoapplyingpowertotheunit
undertest.
2)AfterremovinganelectricalassemblyequippedwithESDs,placetheassemblyonaconductivesurface,suchas
aluminumorcopperfoil,orconductivefoam,topreventelectrostaticchargebuildupinthevicinityoftheassembly.
3)UseonlyagroundedtipsolderingirontosolderordesolderESDs.
4)Useonlyan“anti-static”solderremovaldevice.Somesolderremovaldevicesnotclassiedas“anti-static”can
generateelectricalchargessufcienttodamageESDs.
5)DonotuseFreon-propelledchemicals.Whensprayed,thesecangenerateelectricalchargessufcienttodamageESDs.
6)DonotremoveareplacementESDfromitsprotectivepackaginguntilimmediatelybeforeinstallingit.Most
replacementESDsarepackagedwithallleadsshortedtogetherbyconductivefoam,aluminumfoil,oracomparable
conductivematerial.
7)ImmediatelybeforeremovingtheprotectiveshortingmaterialfromtheleadsofareplacementESD,touchtheprotective
materialtothechassisorcircuitassemblyintowhichthedevicewillbeinstalled.
8)MaintaincontinuouselectricalcontactbetweentheESDandtheassemblyintowhichitwillbeinstalled,until
completelypluggedorsolderedintothecircuit.
9)MinimizebodilymotionswhenhandlingunpackagedreplacementESDs.Normalmotions,suchasthebrushingtogether
ofclothingfabricandliftingone’sfootfromacarpetedoor,cangeneratestaticelectricitysufcienttodamageanESD.
Copyright©1995-2013SAMSUNG.Allrightsreserved.1-6

2.ProductSpecications
2.ProductSpecications
2.1.Specications
2.1.1.ProductOverview
1)Speed
•M337xseries:Upto33ppminA4(35ppminLetter)
•M387xseries:Upto38ppminA4(40ppminLetter)
•M407xseries:Upto40ppminA4(42ppminLetter)
2)Processor
•M337xseries/M387xseries/M407xFR:600MHz
•M407xFX:600MHz+1GHz
3)PrinterLanguages
•PostScript3,PCL6/5e,IBMProPrinter,EPSON,SPL
4)Memory(Std/Max)
•M337xFD/M387xFD/M387xFW/407xFR:256MB/512MB
•M407xFX:1GB/1GB
5)Interfaces
•High-SpeedUSB2.0
•Ethernet
•M337xFD/M387xFD/M387xFW;10/100BaseTX
•M407xFR/M407xFX:10/100/1000BaseTX
•WirelessNetwork
•M387xFWOnly:802.11b/g/n
•LCD
•4–lineLCD:M337xFD/M387xFD/M387xFW/407xFR
•4.3inchT ouchLCD:M407xFX
6)Consumables
•IntegratedTonerSystem
:M3370FD/M3870FD/M3870FW/M4070FR/M4070FX
•SeparatedT onerSystem
:M3375FD/M3875FD/M3875FW/M4075FR/M4075FX
2-1Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.1.2.Specications
•ProductSpecicationsaresubjecttochangewithoutnotice.
2.1.2.1.General
ItemSpecication
Operating10to30°C(50to86°F) Temperature
Storage-20to40°C(-4to104°F)
Operating20to80%RH Humidity
Storage10to90%RH
2.ProductSpecications
NoiseLevel
PowerConsumption
Printmode•M337xseries:Lessthan54dB(A)
•M387x/M407xseries:Lessthan56dB(A)
Copy/Scanmode•M337xseries:Lessthan56dB(A)
•M387x/M407xseries:Lessthan58dB(A)
Readymode•Lessthan10Wh(Except.M407xNX)
•Lessthan15Wh(M407xNX)
AverageoperatingmodeLessthan700W
Powersavemode•Lessthan1.1Wh(Except.M407xNX)
(Wi-FiDirecton:Lessthan2.8Wh/off:1.6Wh,M387xFW
only)
•Lessthan3.9Wh(M407xNX)
DimensionWidthxLengthxHeight•M337xFD/M337xHD/M387xFD/M387xHDseries:414.6x
420.6x449.1mm(16.32x16.56x17.68inches)
•M387xFW/M407xFR/M407xFX/M407xHRseries:467x
444.3x482.6mm(18.39x17.49x19inches)
•M4072FD:410.6x483x449.1mm(16.17x19x17.68
inches)
WeightMachinewith
consumables
•M337xFD/M337xHD/M387xFD/M387xHDseries:21.44
Kg(47.27Ibs)
•M387xFW/M407xFR/M407xFX/M407xHRseries:24.8
Kg(54.68Ibs)
•M4072FD:15.4Kg(33.95lbs)
Reliability&Service
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-2
RecommendedMonthly
PrintingV olume(AMPV)
Max.MonthlyPrint
V olume
•M337xFD:1000~2500pages
•M387xseries:1500~3500pages
•M407xseries:2000~4000pages
•M337xFD:50,000pages
•M387xseries:80,000pages
•M407xseries:100,000pages

2.ProductSpecications
2.1.2.2.Print
ItemSpecication
EngineSpeed
EmulationPostScript3,PCL6/5e,IBMProPrinter,EPSON,SPL
Simplex•M337xseries
•Upto33ppminA4(35ppminLetter)
•M387xseries
•Upto38ppminA4(40ppminLetter)
•M407xseries
•Upto40ppminA4(42ppminLetter)
Duplex•M337xseries
•Upto16ipminA4(17ipminLetter)
•M387xseries
•Upto19ipminA4(20ipminLetter)
•M407xseries
•Upto20ipminA4(21ipminLetter)
ReadyModeAsfastas6.5sec FPOT
SleepMode•M337xseries:Lessthan15.5sec
•M387x/407xseries:Lessthan18sec
Optical(Standard)600x600dpi Resolution
EnhancedUpto1,200x1,200dpieffectiveoutput
2-3Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.1.2.3.Copier
ItemSpecication
2.ProductSpecications
CopySpeedSDMC(SDMC:Single
DocumentMultipleCopy)
FCOTFromReady@PlatenLessthan10sec
Resolution(ADF)
Resolution(Platen)
Textmode•Scan:600x600dpi
Text&PrintedPhoto
mode
GlossyPhotomode•Scan:600x600dpi
Textmode•Scan:600x600dpi
Text&PrintedPhoto
mode
GlossyPhotomode•Scan:1200x1200dpi
[SimplextoSimplex(1-1)]
•M337xseries
•Upto33cpminA4(35cpminLetter)
•M387xseries
•Upto38cpminA4(40cpminLetter)
•M407xseries
•Upto40cpminA4(42cpminLetter)
•Print:600x600x2bitdpi
•Scan:600x600dpi
•Print:600x600x2bitdpi
•Print:600x600x2bitdpi
•Print:600x600x2bitdpi
•Scan:600x600dpi
•Print:600x600x2bitdpi
•Print:1200x1200x1bit-Addressable
CopierFeatures
DuplexCopy•M337xFD/M387xFD/M4072FD:1–to–2
•M387xFW/M407xFR/M407xFX:2-to-1,2-to-2,1-to-2
Reduce/Enlarge25to400%by1%unit
IDCardCopyYes
N-up2,4
DarknessAdjustment11levels
MulticopyQuanityMax99copies
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-4

2.ProductSpecications
2.1.2.4.Scanner
ItemSpecication
ScanMethod3CHCIS
CompatibilityTWAINStandard,WIAStandard
ScanSpeed
Resolution
ScanningSize((D)ADF)
ScanningSize(Platen)
ScantoPC,Email,USBMemory,FTP ,SMB
ScanFileFormatPDF,JPEG,XPS,TIFF
B/W24ipm@300dpi
Gray24ipm@300dpi
Color8ipm@300dpi
Platen(Optical)600x600dpi
(D)ADF(Optical)600x600dpi
MaxResolution@Scanto
LocalHost
Max.DocumentWidth216mm[81/2"]
EffectiveScanWidth208mm[8.19"]
Max.DocumentLength356mm[14']
EffectiveScanLength348mm[13.7"]
Max.DocumentWidth216mm[81/2"]
EffectiveScanWidth208mm[8.19"]
Max.DocumentLength297mm[11.7"]
EffectiveScanLength289mm[11.37"]
4800x4800dpi
2-5Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.1.2.5.Fax
ItemSpecication
CompatibilityITU-TG3,ECM
CompressionMethodMH/MR/MMR,JBIG,JPEG
ModemSpeed33.6Kbps
TransmissionSpeed3sec@336Kbps
GrayScale/Halftones256levels
2.ProductSpecications
Resolution
FaxMemory6MB
MaxDocumentWidth216mm[81/2"]
MaxDocumentLength356mm[14']
Standard203x98dpi
Fine/Photo203x196dpi
SuperFine300x300dpi
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-6

2.ProductSpecications
2.1.2.6.ControllerandSoftware
ItemSpecication
Processor•M337xseries/M387xseries/M407xFR/M4072FD:600
MHz
•M407xFX:600MHz+1GHz
Memory
DriverSupportingOS
Standard•M337xFD/M387xFD/M387xFW/M407xFR/M4072FD
Max•M337xFD/M387xFD/M387xFW/M407xFR/M4072FD
:256MB
•M407xFX:1GB
:512MB
•M407xFX:1GB
[Window]
•XP(32/64bit)/2003Server(32/64bit)/Vista(32/64bit)
/2008server(32/64bit)/7(32/64bit)/2008ServerR2/8
(32/64bit)
[Mac]
•X10.5~10.8
[Linux]
•RedHatEnterpriseWS4,5,6(32/64bit)
•Fedora5,6,7,8,9,10,11,12,13,14,15(32/64bit)
•OpenSuSE10.2,10.3,11.0,11.1,11.2,11.3,11.4(32/64bit)
•SuSELinuxEnterpriseDesktop10,11(32/64bit)
•Debian4.0,5.0,6.0(32/64bit)
•Mandriva2007,2008,2009,2009.1,2010(32/64bit)
•Ubuntu6.06,6.10,7.04,7.10,8.04,8.10,9.04,9.10,10.04,
10.10,11.04(32/64bit)
NetworkProtocols[TCP/IP]
[Unix]
•HP-UX11.0,11iv1,11iv2,11iv3(P A-RISC,Itanium)
•SunSolaris9,10,11(x86,SPARC)
•TCP/IPv4/IPv6,HTTP ,SNMPv1/v2c/v3,SMTP ,IPSec,
DNS/WINS,DDNS,DHCP ,SSL/TLS,BOOTP ,AutoIP ,
StandardTCP/IPprinting,LPR,IPP,UPnP(SSDP),Bonjour,
Telnet,WSD,SLP ,SetIP
[Others]
•HTTPs,IPPs,802.1x(EAP-MD5,EAP-MSCHAPv2,PEAP ,
TLS),IPSec
2-7Copyright©1995-2013SAMSUNG.Allrightsreserved.

ItemSpecication
Interface•High-SpeedUSB2.0
•Ethernet
•M337xFD/M387xFD/M387xFW;10/100BaseTX
•M407xFR/M407xFX:10/100/1000BaseTX
•WirelessNetwork
•ProXpressM382xDWOnly:802.11b/g/n
•LCD
•4–lineLCD:M337xFD/M387xFD/M387xFW/
407xFR/4072FD
•4.3inchTouchLCD:M407xFX
SoftwareandApplication•AdminDeploymentApplication
•EasyPrinterManager
2.ProductSpecications
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-8

2.ProductSpecications
2.1.2.7.PaperHandling
ItemSpecication
StandardCapacity
Max.Capacity
•M337xseries
•250-sheetCassetteTray@80g/m²
•1–sheetManualFeeder
•M387x/M407xseries
•250-sheetCassetteTray@80g/m²
•50–sheetMultiPurposeTray@80g/m²
•M337xseries
•771sheet(@80g/m²)withoptioncassette
•M387x/M407xseries
•820sheet(@80g/m²)withoptioncassette
Printing
Multi-purposetray
NOTE
M387x/M407xseries
StandardCassetteTray
OptionalCassetteTray
•Max.Size:216x356mm(8.5"x14")
•Min.Size:76x127mm(3.0"x5.0")
Capacity
Mediasizes
Mediatype
Mediaweight16~58lb(60to220g/m²)
SensingPaperEmpty
Capacity250sheets@80g/m²
Mediasizes
MediatypesPlainPaper,Thin,Thick,Recycled,Bond,Cardstock,Archive
Mediaweight16~43lb(60to163g/m²)
SensingPaperEmpty
Capacity520sheets@80g/m²
MediasizesA4,A5,A6,Letter,Legal,Folio,Ocio,Executive,ISOB5,JISB5
MediatypesPlainPaper,Thin,Thick,Recycled,Bond,Cardstock,Archive
•PlainPaper:50sheets@80g/m²
•Envelop:5sheets
A4,A5,A6,Letter,Legal,Folio,Ocio,Executive,ISOB5,JISB5,
3"x5",Envelope(Monarch,No.10,DL,C5,C6),Custom
Plain,Thin,Thick,Thicker,Cotton,Colored,Envelope,Transparency ,
Pre-Printed,Recycled,Labels,Bond,Cardstock,Archive
A4,A5,A6,Letter,Legal,Folio,Ocio,Executive,ISOB5,JISB5,
Custom
Mediaweight16~43lb(60to163g/m²)
SensingCSTOpen,PaperEmpty
OutputStacking
Capacity
OutputFullsensingYes
SupportingBuilt-in
MediasizesA4,Letter,Ocio,Folio,Legal
Duplex
MediatypesPlainPaper,Thin,Thick,Recycled,Bond
Mediaweight16~32lb(60to120g/m²)
2-9Copyright©1995-2013SAMSUNG.Allrightsreserved.
•Face-Down:150sheets@80g/m²
•Face-Up:1sheet

ItemSpecication
Capacity50sheet@80g/m²
2.ProductSpecications
ADF
DocumentWeight12.5~28lb
DocumentSize•Width:142~216mm(5.6"~8.5")
PrintableAreaNon-PrintableArea
•Length:148~356mm(5.8"~14.0")
•Envelop:10mm(0.4")fromedge(T op,Bottom,Left,Right)
•OtherMedia:4mm(0.16")fromedge(Top,Bottom,Left,
Right)
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-10

2.ProductSpecications
2.1.2.8.Consumables
NOTE
M337x/M387x/M407xserieshave2typesofconsumabledependingonmodel.
•IntegratedTonerSystem:M3370FD/M3870FD/M3870FW/M4070FW/M4070FX/M4072FD
•SeparatedT onerSystem:M3375FD/M3875FD/M3875FW/M4075FW/M4075FX
IntegratedTonerSystem
ItemModelNameA verageyieldM3370FD
LaserToner
Cartridge
NOTE
•Theyieldofinitialtonercartridgeisapprox.3,000pages.
•DeclaredcartridgeyieldinaccordancewithISO/IEC19752.
MLT-D203SApprox.3,000pagesOOO
MLT-D203LApprox.5,000pagesOOO
MLT-D203EApprox.10,000pagesXOO
MLT-D203UApprox.15,000pagesXXO
SeparatedTonerSystem
ItemModelNameA verageyieldM3375FD
TonerCartridge
MLT-D204SApprox.3,000pagesOOO
MLT-D204LApprox.5,000pagesOOO
M3870FD
M3870FW
M3875FD
M3875FW
M4070FR
M4070FX
M4072FD
M4075FR
M4075FX
MLT-D204EApprox.10,000pagesXOO
MLT-D204UApprox.15,000pagesXXO
ImagingUnitMLT-R204Approx.30,000pagesOOO
NOTE
•Theyieldofinitialtonercartridgeisapprox.3,000pages.
•DeclaredcartridgeyieldinaccordancewithISO/IEC19752.
CAUTION
Whenpurchasingnewtonercartridgesorothersupplies,thesemustbepurchasedinthesamecountryasthemachine
youareusing.Otherwise,newtonercartridgesorothersupplieswillbeincompatiblewithyourmachineduetodifferent
congurationsoftonercartridgesandothersuppliesaccordingtothespeciccountryconditions.
2-11Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.1.2.9.MaintenancePart
ItemPartCodeLife
Pickuproller(Tray1)JC73-00340AApprox.90,000pages
Pickup/Forwardroller(Tray2)JC97-02259AApprox.200,000pages
Reverseroller(Tray1)JC90-01032AApprox.60,000pages
Reverseroller(Tray2)JC97-02259AApprox.100,000pages
TransferrollerJC66-02842AApprox.100,000pages
2.ProductSpecications
FuserUnit•JC91-01023A(110V)
•JC91-01024A(220V)
Approx.90,000pages
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-12

2.ProductSpecications
2.2.ProductDescription
Thischapterdescribesthefunctionsandoperatingprincipalofthemaincomponent.
2.2.1.FrontView
NOTE
•Thisillustrationmaydifferfromyourmachinedependingonyourmodel.Therearevarioustypesofmachine.
•Somefeaturesandoptionalgoodsmaynotbeavailabledependingonmodelorcountry
1Documentfeedercover
2Documentfeederwidthguide
3Documentfeederinputtray
4Documentfeedersupporttray
5Documentfeederoutputtray
6Controlpanel
7Controlboardcover
8Frontcover
9Paperlevelindicator
10Tray2
11Tray1
12Multi-purpose(ormanualfeeder)tray
13USBmemoryport
2-13Copyright©1995-2013SAMSUNG.Allrightsreserved.
14Outputsupporttray
15Outputtray
16Scannerglass
17Scannerlid
18Frontcoverhandle
19Paperwidthguidesonamultipurpose(ormanual
feeder)tray
20Multi-purposesupporttray
21Tonercartridge
NOTE
M3370M3870M4070M4072FDseries

2.ProductSpecications
22Tonercartridge
NOTE
M3375M3875M4075series
23Imagingunit
NOTE
M3375M3875M4075series
24Handset
NOTE
Handsetmodelonly
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-14

2.ProductSpecications
2.2.2.RearView
NOTE
•Thisillustrationmaydifferfromyourmachinedependingonyourmodel.Therearevarioustypesofmachine.
•Somefeaturesandoptionalgoodsmaynotbeavailabledependingonmodelorcountry
1Rearcover
2Networkport
3USBport
45VoutputportforIEEE1284Bparallelconnector
NOTE
ThisoptionalIEEE1284BparallelconnectorcanbeusedbyplugginginboththeUSBportandthe
5Voutputport.
5Power-switch
6Powerreceptacle
7Telephonelinesocket(LINE)
8Extensiontelephonesocket(EXT .)
9Rearcoverhandle
2-15Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.2.3.PaperPath
[1] Simplex [2] Duplex [3] MP
Thefollowingdiagramdisplaysthepaththepaperfollowsduringtheprintingprocess.
2.ProductSpecications
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-16

2.ProductSpecications
1
2
3
4
7
6
8
5
11
10
9
12
14
132
2.2.4.Systemlayout
ThismodelconsistsoftheScannerpart,Enginepart,HardwareandFirmware.Thescannerpartconsistsoftheplatenunit,
ADF/DADFunit,OPEunit.TheenginepartconsistsofthemechanicalpartscomprisingFrame,Duplex,Tonercartridge,
Driveunit,Transferroller,Fuser,Cassette.TheHardwarepartconsistsofthemaincontrolboard,powerboard,operation
panel,PCInterface.
1LSU
2Cartridge
3Regiroller
4MP
5Feedroller
6Pickuproller
7Cassette
8Duplex
9Fuser
10Exitroller1
11Exitroller2
12Scanner(Platen)
13DADF/ADF
14OPE
2-17Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
2.2.4.1.FeedingPart
Itconsistsofacassette,anMPtrayforsupplyingdifferenttypesofmedia(envelope,label,specialpaper)andparts
relatedtopaperfeedinitialization.
1)Cassette
ThepapertraysconsistoftheMaintrays,Optionaltrays(SCF),andoneMulti-Purpose(MP)tray.Thebasiccassetteis
locatedonfrontsideofthemachineandallowsfeedingofcommonpaper.PapersizeissetusingtheSizeGuidesineach
tray.AdjustthePaperlength/widthguidestomatchthepapersize.
2)Pickup/Reverse(Retard)roller
Whenpickuptakesplace,thepickuprollerrotatestoseparateandtransportthepaper.Thepickuprollerrotateswhenthe
pickupclutchisactivated.Theretardrollerservetomakesurethatasinglesheetofpaperismovedtothepaperpath,andthe
paperismovedasfarastheregistrationrollerbytheworkofthefeedroller.Thefollowingisadiagramofthepickupsection:
3)Registrationroller
Itisusedasanantiskewdevice,andtosetupproperregistrationtimingwiththatofthetonedimageonthedrum.Italsois
usedforjamdetectiontoensurepaperhasleftthepapertray.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-18

2.ProductSpecications
4)MPTray
Themulti-purposetraycanholdspecialsizesandtypesofprintmaterial,suchaspostcards,notecards,andenvelopes.
Itisusefulforsinglepageprintingonletterheadorcoloredpaper.Ituses3rollersfeedingmethodtofeed50sheets
ofgeneralpapers.
5)DuplexUnit
Ithaspapertransferringfunction,paperguidefunction,jamremovingfunction.Itisdesignedforbasicattachment,andthe
duplexfeedingtakesasidefeedingmethod.UsablepapersareA4,letter,andlegalsizepaper.Forremovingajamoccurred
inafrontpart,itisdesignedtoopenacassetteandaguide.Itisdesignedtoopenarearcovertoremoveajaminarearpart.
Ifafaceuptrayisopen,theduplexoptioncannotbeused.
6)SCF(SecondCassetteFeeder)
Itisthesamemethodwiththemaincassette,andthecapacityis520sheets.Ithasaseparatedrivingmechanism.Itis
designedforacommonusewithamaincassette.
2-19Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.2.4.2.ImageCreation
1)Printingprocessoverview
2.ProductSpecications
ThismonoprintingsystemincludestheLSUwithalaserbeam,atonercartridgeandtransferroller.
Thismachineusestonercartridgeandlaserbeamformonoprinting.
M337x/M387x/M407xserieshas2typesoftonercartridge.M3370/M3870/M4070/M4072FDserieshastheintegrated
tonersystemandM3375/M3875/M4075serieshasseparatedtonersystem.Theseparatedtonersystemconsistsoftoner
cartridgeandimagingunit.TheimagingunithasanOPCdrum,cleaningbladeetc.
TheOPCdrumischargedwithanegativevoltagebythechargerollerandisexposedbythelightfromtheLSU(Laser
Scanningunit).ThelightproducedbyalasercreatesalatentimagebydischargingonthesurfaceoftheOPCdrum.The
negativelychargedtonersareattractedtothelatentimageduetoandelectriceld.Thetoners(realimage)ontheOPCdrum
aremovedtothetransfermediabythepositivebiasappliedtothetransferroller.
1)ChargingtheOPCdrum:Thechargerollergivesthedrumnegativecharges.
2)Laserexposure:LightproducedbyalaserdiodeirradiatesthechargedOPCthroughthelensandmirrors.
3)Development:Thismachineusesadual-componentdevelopmentsystem.Themagneticrollercarriesnegatively
chargedtonertothelatentimageonthedrumsurface.
4)Transfer:ThetransferrollersoppositetheOPCdrumstransfertonerfromthedrumstothetransfermedia(e.g.paper,
OHPlm,etc).
5)CleaningforOPCdrum:Thecleaningbladeremovesremainingtonersonthedrumsurfaceafterimagetransfer
tothepaper.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-20

2.ProductSpecications
Imaging Unit
Toner Cartridge
2)Integrated/SeparatedTonerSystem
Byusingtheelectronicphotoprocess,itcreatesavisualimage.
M3370/M3870/M4070/M4072FDseriesM3375/M3875/M4075series
IntegratedTonerSystemSeparatedTonerSystem
•Operationcondition:T emp10~30℃,Humidity20~85%RH
•DevelopingMethod:Nonmagnetic1elementcontactingmethod
•Toner:Nonmagnetic1elementshattertypetoner
•TonerResidualSensor:DotcountwithzCRUM
•OPCCleaning:Collectthetonerbyusingcleaningblade
•Handlingofwastedtoner:Collectthewastedtonerinthecleaningframebyusingcleaningblade
•OPCDrumProtectingShutter:None
•Classifyingdevicefortonercartridge:IDisclassiedbyCRUM.
2-21Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
Pressure Roller
Pressure Roller2
Halogen Lamp
Heat Roller
Thermistor
Thermostat
2.2.4.3.Fuserunit
Itisconsistedofahalogenlamp,heatroller,pressureroller,thermistorandthermostat.Itsticksthetoneronapaperby
heatandpressuretocompletetheprintingjob.
1)Thermostat
Whenaheatlampisoverheated,aThermostatcutsoffthemainpowertopreventover-heating.
•ThermostatT ype:Non-Contacttype
•ControlT emperature:190℃±5℃
2)Thermistor
Itisatemperaturedetectingsensor.
•TemperatureResistance:7KΩ(180℃)
•RatedB-valueR25/853370K±3%(TheRatedB-valueiscalculatedfromthezero-powerresistancemeasured
at25℃and85℃)
3)Heatroller
Theheatrollertransferstheheatfromthelamptoapplyaheatonthepaper.
ThesurfaceofaheatrolleriscoatedwithTeon,sotonerdoesnotsticktothesurface.
4)Pressureroller
Apressurerollermountedunderaheatrollerismadeofasiliconresin,andthesurfacealsoiscoatedwithTeon.When
apaperpassesbetweenaheatrollerandapressureroller,thetoneradherestothesurfaceofapaperpermanently
throughthiscombinationofheatandpressure.
5)HalogenLamp
•V oltage:120V ,115±5%/220V ,230±5%
•Capacity:850W att±42.5W
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-22

2.ProductSpecications
OPC Drum
Photo Diode
LD Driver circuit
Polygon Mirror
Polygon Motor
Motor Driver
Protector panel
LD (Laser Diode)
2.2.4.4.LSU(LaserScanningUnit)
ItisthecorepartoftheLBPwhichswitchesfromthevideodatareceivedtothecontrollertotheelectrostaticlatentimage
ontheOPCdrumbycontrollinglaserbeam,exposingOPCdrum,andturningprincipleofpolygonmirror.TheOPCdrumis
turnedwiththepaperfeedingspeed.TheHSYNCsignaliscreatedwhenthelaserbeamfromLSUreachestheendofthe
polygonmirror,andthesignalissenttothecontroller.ThecontrollerdetectstheHSYNCsignaltoadjusttheverticallineof
theimageonpaper.Inotherwords,aftertheHSYNCsignalisdetected,theimagedataissenttotheLSUtoadjusttheleft
marginonpaper.Theonesideofthepolygonmirrorisonelineforscanning.
2-23Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.2.4.5.DriveUnit
Main Drive Unit
Feed Drive Unit
ProXpressM337x/M387x/M407xserieshas2driveunitsthatisassembledtotherightsideofthemachine.
ThemaindriveunitconsistsofaBLDCmotor,aclutch,variousgearsforOPC,fuser,exit,feedetc.
Thefeeddriveunitconsistsof2gearsforMP ,feed.
2.ProductSpecications
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-24

2.ProductSpecications
DDR3 DIMM
(128MB)
MAIN
A150 0
FUSER Unit
ThermoSta t
Thermistor1
Exit
Senso r
Regi
Clutch
Pickup
Clutch
Front Cover
Micro Switch
24V
5V_SMPS
FUSER ON
24VS
3.3V
3.3V_Cove r_Ope n1
3.3V_Cove r_Open3.3V
DEVELOPER Unit
FAN MAIN
FAN
SMPS
OPC MHV
DEV
Supply
THV
Varistor
T
D
S
DRUM
M
EEPR OM
(32KB)
0
0
Network
RTL8211E
25MHz
FUSER
BIAS
INLET
Pape r
Outbinfull
Senso r
12MHz
MAIN CLK
US B 2.0
1
2
CN24(2mm)
THERM
nMOT_D IR
MAIN_BLDC_CLK
MOT_RE ADY
nMOT_E N
GND
GND
GND
GND
24VS
24VS
24VS
PICKUP _C LT
24VS
REGI_C LT
123456789
1011121314
CN31(2mm)
MAIN MOTOR
3.3V_P S
GND
nSENS _P_ EXIT
123
CN7(2mm)
EXIT
SENS OR
3.3V_P S
GND
nSEN S_ BIN_F ULL
3.3V_C_O PE N1
3.3V_C_O PE N2
12345
CN2(1.5mm)
OUTBIN FULL
COVER OP EN
VBUS
DM
DP
GND
1
2
3
4
CN21
USB_IF
MX0P
MX0N
MX1P
MX2P
MX2N
MX1N
MX3P
MX3N
GND
LED1
LED0
3.3V_P S
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN20
NETWORK_IF
N.C
N.C
LED_ECO
N.C
nKEY_EC O
PWR_LE D
nPOW ER_ SW
GND
5V_SUS
nKEY_C ANCE L
LED_RE ADY
LED_ER RO R
LED_TO NE R
CN9
(1.5mm )
OPE I/F(LED)
123456789
101112
13
HVPS
131211
10
987654321
24VS
GND
THV_RE AD
nTHV_E N
PWM_THV
PWM_DE V_DC
PWM_MHV
PWM_FU S ER _BIAS
GND
GND
3.3V
3.3V_C ove r_ Ope n 1
1
2
3
4
5
6
7
8
9
10
11
12
CN8(1. 5mm)
HVPS
5V_SMP S
GND
24V1
GND
1
2
3
4
CN22
(3.9 6mm)
SMPS
SMPS
5V_S MP S
GND
24V1
GND
1
2
3
4
CN
SMPS
GND
24V OFF
Relay
24VS
Fuse r ON
1
2
3
4
5
CN
SMPS
GND
24V OFF
Relay_AC_ON
24VS
Fuse r ON
5
4
3
2
1
CN26
(2mm)
SMPS
24VS
GND(FB )
N.C
FAN_MAIN
1
2
3
CN30
(2mm)
MAIN FAN
24VS
FAN_SMPS(F/ B)
1
2
CN29
(2mm)
SMPS FA N
12
11
10
9
8
7
6
5
4
3
2
1
EMPTY
Senso r
REGI
Senso r
3.3VS
GND
nSEN S_ P_E MPT Y
3.3VS
GND
nSEN S_ P_R EGI
3.3VS
GND
nSEN S_ P_F EED
123456789
CN6(2mm)
SENSOR
24VS
MP_CLU TCH
3.3VS
GND
SENS _MP
12345
CN19(2mm )
MP
FEED
Senso r
24VS
GND
THV_REA D
nTHV_EN
PWM_THV
PWM_DE V_DC
PWM_MHV
PWM_FU S ER_B IAS
GND
GND
3.3V
3.3V_C ove r_Op en
LAN
NAND FLASH
(128MB)
MP
ClutchMPSenso r
AMBIENT
GND
1
2
CN28(2mm)
AIR
TEMP
USB HUB
Cover
Open
Ambient
Temp
Senso r
32.7KHz
RTC C LK
25MHz
LED4(Re s er ved)
nKEY_4 (Res e rve d)
LED_EC O
LED_3 _1_ BLUE(R es e rved )
nKEY_EC O
LED_PO WE R
nKEY_PO WER
GND5VnKEY_C ANCE L
LED_R EADY
LED_ER RO R
LED_TO NER
3.3VDMDP
GND
GND
N.C
12345
6
CN16
USB_IF
CL CL CL
3.3V_Cove r_Ope n2
5V_SUS P
N.C
GND
5V_SUS P
1
2
3
4
CN35
PARALLEL
PARALLEL
OPTIO N
DDR3 DIMM
(256MB)
rrML-4210/15 ND
OP PANEL
(LED)
nPOWE R_ SW
5V_SUS P
GND
OPE _TXD
OPE_R XD
nRS T_OP E
CN18
(1.5mm )
OPE I/F(2lLINE)
12345
6
OP E_LC D
LCD (2-Line)
65432
1
nPOWE R_ SW5VGND
OPE_R XD
OPE_TX D
nRST_O P E
INLET
L
N
FUSER
L
N
10
987654321
Main Mo tor
CW/CCW
CLOCK
READY
START/STO P
NC
BRAKE
GND
GND
+24V
+24V
Cover
Open
Senso r
3.3V_PS
GND
nSENS_Co_Open
123
CN27(1.5 mm)
Cover Open
SENS OR
321
321
32132
1
321321321
GND
SCL1
3.3V_C RU M
SDA
1
2
3
4
CN9
(1.5 mm)
Z-CRUM
CRUM
GND
SCL1
SDA1
3.3V_C RU M
1
2
3
4
CN4
(2mm)
CRUM
Z-CRUM
N.C
N.C
GND
SCL
3.3V_C RU M
SDA
6
5
4
3
2
1
CRUM I/F PBA
THERM_1
V_PROTECT_ ON
3.3V_LS U
nHsync
GND
VDO_1_P
VDO_1 _N
GND
nSH _1
nSH _2
GND
VDO_2_P
VDO_2 _N
GND
nLD_ON
LD_POWE R
N.C
CLK_LSU_ MO T
nREADY_LS U
nLSU_ MOT_E N
GND
24VS
2019181716151413121110
987654321
CN17(FF C 1mm )
LSU_IF
2019181716151413121110
987
CLK_LSU_ MO T
nRE ADY_LSU
nLSU_ MOT _EN
GND
24VS
LSU
(Dual Beam )
54321
3.3V_LSU
nHsync
GND
VDO_1 _P
VDO_1 _N
GND
nSH_1
nSH_2
GND
VDO_2 _P
VDO_2 _N
GND
nLD_ON
LD_PO WER
CN11(1.5 mm)
SCF_IF
24V1
24V1
5V_S US P
nRS T_S C F
SCF _TXD
SCF _RX D
nSC F_O P R
_RE Q
GND
GND
GND
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
N.C
OPT_n CMDR E Q
N.C
N.C
GND
GND
GND
GND
GND
24V
24V
24V
5V
5V
5V
OPT_n RE S E T
OPT_R XD
OPT_TX D
SCF
DRAWER CN
2.2.5.Hardwareconguration
ProXpressM337x/M387x/M407xseriesElectricalCircuitsystemconsistsofthefollowing:
•Maincontroller
•OPEcontroller
•DDR3SODIMM
•SCFboard(Option)
•SMPSboard
•HVPSboard
•WLANModule(M387xFWonly)
•MICROSD4GB(M407xFR/M407xFXonly)
DiagramoftheM337xFD/387xFD/387xFW/407xFR/407xFX/4072FDSeriesElectricalCircuit
Themaincontrollercontrolsallmodulesrequiredtoprint,thatis,LSU,HVPS,SMPS,F AN,Fuser,etc.
ThemaincontrollerreceivesprintdatafromthehostthroughnetworkorUSBPortorfax,Scanner.Ittakesthisinformation
andgeneratesprintablevideobitmapdata.EngineandVideocontrollerarenotseparated.
ThemaincontrolleradoptstheA1500(600MHz)CPU,DIMMPBAonDDR3memoryandexternalmemorytoperform
printingandScanjobssuccessfully.
TheOPEcontrollerdisplaysthestatusofthesystemusing16x4lineLCDinresponsetouseractionsorthemaincontroller.
TheHVPSsupplieshighvoltagefordevelopingProcess.HighV oltagecontrolledbyPWMsignalfromCPU.
SMPSmakes+5Vand+24VDCfrom220Vor110AC.
WLANmoduleisusedforwirelesscommunication.
2-25Copyright©1995-2013SAMSUNG.Allrightsreserved.

DiagramoftheM407xFXSeriesElectricalCircuit
10
987654321
3.3V
GND
nSC ANNE R_HOM E
MAIN
C4 N
FUSER Unit
ThermoSta t
Thermistor1
Exit
Senso r
Regi
Clutch
Pickup
Clutch
Front Cover
Micro Switch
24V
5V_SMPS
FUSER ON
24VS
3.3V
3.3V_Cove r_Ope n1
3.3V_Cove r_Open3.3V
DEVELOPER Unit
FAN MAIN
FAN
SMPS
OPC MHV
DEV
Supply
THV
Varistor
T
D
S
DRUM
M
Main Mo tor
DDR3
DIMM
(1GB)
EEPR OM
(64KB)
00
Network
RTL8211E
25MHz
FUSER
BIAS
INLET
Pape r
Outbinfull
Senso r
12MHz
MAIN CLK
US B 2.0
INLET
THERM_1
V_PROTECT_ ON
1
2
CN24(2mm)
THERM
nMOT_D IR
MAIN_BLDC_CLK
MOT_REA DY
nMOT_E N
GND
GND
GND
GND
24VS
24VS
24VS
PICKUP _C LT
24VS
REGI_C LT
123456789
1011121314
CN31(2mm)
MAIN MOTOR
3.3V_P S
GND
nSENS _P_ EXIT
123
CN27(2mm)
EXIT
SENS OR
3.3V_P S
GND
nSENS _ BIN_F ULL
3.3V_C_O PE N1
3.3V_C_O PE N2
12345
CN2(1.5mm)
OUTBIN FULL
COVER OP EN
VBUS
DM
DP
GND
1
2
3
4
CN21
USB_IF
MX0P
MX0N
MX1P
MX2P
MX2N
MX1N
MX3P
MX3N
GND
LED1
LED0
3.3V_P S
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN20
NETWORK_IF
nSCAN H OME
3.3V_PS
LCD_BL_PW M
GND
LCD_LVDS 3+
LCD_LVDS3-
GND
LCD_LVDS_C LK+
LCD_LVDS _C LK-
GND
LCD_LVDS 2+
LCD_LVDS2-
GND
LCD_LVDS 1+
LCD_LVDS1-
GND
LCD_LVDS 0+
LCD_LVDS0-
GND
RXD_O PE
TXD_OPE
GND
nRS T_MIC OM_OE
nKEY_SO FT_P WR
nINT_TOU CH
GND
SDA_TOU CH
SCL_TOUC H
3.3V
3.3V
CN16( FFC 1m m)
OPE I/F(4.3 inch TOUCH LCD)
123456789
101112131415161718192021222324252627282930
3.3V_LS U
nHsync
GND
VDO_1_P
VDO_1 _N
GND
nSH _1
nSH _2
GND
VDO_2_P
VDO_2 _N
GND
nLD_ON
LD_POWE R
N.C
CLK_LSU_ MOT
nREADY_LS U
nLSU_M OT_E N
GND
24VS
2019181716151413121110
987654321
CN17(FF C 1m m)
LSU_IF
HVPS
2019181716151413121110
987
302928272625242322212019181716151413121110
987654321
24VS
GND
THV_RE AD
nTHV_E N
PWM_THV
PWM_DE V_DC
PWM_MHV
PWM_FU S ER_B IAS
GND
GND
3.3V
3.3V_C ove r_ Ope n 1
1
2
3
4
5
6
7
8
9
10
11
12
CN8(1.5 mm)
HVPS
5V_S MP S
GND
24V1
GND
24V2
1
2
3
4
5
CN22
(3.96m m)
SMPS
SMPS
5V_S MP S
GND
24V1
GND
24V2
1
2
3
4
5
CN
SMPS
GND
24V OFF
Relay
24VS
Fuse r ON
1
2
3
4
5
CN
SMPS
GND
24V OFF
Relay_AC_ ON
24VS
Fuse r ON
5
4
3
2
1
CN26
(2mm)
SMPS
24VS
GND(FB )
N.C
FAN_MAIN
1
2
3
CN14
(2mm)
MAIN FAN
24VS
FAN_SMPS (F/B)
1
2
CN30
(2mm)
SMPS FA N
12
11
10
9
8
7
6
5
4
3
2
1
GND
SCL1
3.3V_C RU M
SDA
1
2
3
4
CN38(1.5mm)
Z-CRUM
EMPTY
Senso r
REGI
Senso r
3.3VS
GND
nSENS _ P_E MPT Y
3.3VS
GND
nSENS _ P_R EGI
3.3VS
GND
nSENS _ P_FE ED
123456789
CN6(2mm)
SENSOR
24VS
MP_CLU TCH
3.3VS
GND
SENS _MP
12345
CN19(2mm )
MP
FEED
Senso r
24VS
GND
THV_REA D
nTHV_EN
PWM_THV
PWM_DE V_DC
PWM_MHV
PWM_FU S ER_B IAS
GND
GND
3.3V
3.3V_C ove r_Op en
CN35(1. 5mm)
SCF_IF
CLK_LSU_ MO T
nRE ADY_LSU
nLSU_ MOT_E N
GND
24VS
LSU
(Dual Beam )
24V1
24V1
5V_SUS P
nRS T_S C F
SCF _TXD
SCF_R XD
nSC F_O P R
_RE Q
GND
GND
GND
1
2
3
4
5
6
7
8
9
10
LAN
B_VIN
GND
G_VIN
GND
R_VIN
GND
3.3V_C IS
3.3V_C IS
SCAN_ CTR
CIS_SP
CIS_C LK
LED_C OMMO N
CIS_BLE D
CIS_G LED
CIS_RLE D
GND
123456789
10111213141516
CN9(FFC 1 mm)
CIS_IF
OUT1A
OUT1B
OUT2A
OUT2B
123
4
CN13
(1.5mm)
SCAN_MTR
MT
STEP
GND
GND
RADF_ REG I_S OL
nSENS _R ADF_P _D ET
nSENS _R ADF_ P_R EG
nRADF _MOT_S LE EP
nRADF_M OT_E N
RADF_ MOT_ PLS
RADF_ MOT_ CURR E NT
RADF_ MOT_DIR
GND
GND
RADF_P ICKUP _S OL
nSENS _RADF_COV ER_OPE N
nSENS _R ADF_ P_P O S
RADF_ MOT_ MS1
RADF_ MOT_ MS2
24V2
5V_PS
DADF_EXIT_S O L
123456789
1011121314151617181920
CN12(1. 5mm)
RADF_IF
MODEM
(Conexant _S SF 336)
NAND FLASH
(512MB)
Sca n
Motor
123456789
10111213141516
MP
ClutchMPSenso r
AMBIENT
GND
1
2
CN28(2mm)
AIR
TEMP
USB HUB
123
Scanner
Home
Sensor
Cover
Open
Ambient
Temp
Senso r
PEAKER
1
2
3CH C IS
12345
Handset
Model Only
32.7KHz
RTC C LK
25MHz
nHOOK_ DET
MODEM_S CK
nINT_MODE M
nCS_MOD EM
MODEM_ MISO
MODEM_ MOS I
nRS T_MODE M
KEY_CLICK
GND
3.3V
CN5
(FFC 1mm )
MODEM I/F
123456789
10
10
987654321
nHOO K_DE T
MODEM_ SCK
nMODEM_I NT
nMODEM_C S
MODEM_ SP IDI
MODEM_S PID O
nM_RES E T
KEYCLICK
GND
3.3V
SCAN HO ME
3.3V_P S
LCD_BL_P WM
GND
LCD_LVDS 3+
LCD_LVDS3-
GND
LCD_LVDS _CLK+
LCD_LVDS _C LK-
GND
LCD_LVDS 2+
LCD_LVDS2-
GND
LCD_LVDS 1+
LCD_LVDS1-
GND
LCD_LVDS 0+
LCD_LVDS0-
GND
RXD_OP E
TXD_OP E
GND
nRST_M ICOM _OP E
nKEY_SO FT _PWR
nINT_TOUCH
GND
SDA_TO UCH
SCL_TO UCH
3.3V
3.3V
SD_ D2
SD_ D3
SD_ CMD
SD_ PWR_ 3.3
SD_ CLK
SD_ D0
SD_ D1
N.C
N.C
GND
GND
GND
GND
CN32
SD CARD_IF
123456789
1011121314
VBUSDMDP
GND
123
4
CN37
USB_IF
3.3VDMDP
GND
GND
DETECT
12345
6
33CN16
USB_IF
SD CARD
CL CL CL
3.3V_Co ver_Op en 2
RADF JOINT P BA
(JC9 2-02353A)
CN36(1.5 mm)
ADF_IF
OUT2B
OUT1B
OUT2A
OUT1A
ANODE_C
ANODE_B
ANODE_A
GND
nSENS _P_P OS
nSENS_C_OPN
GND
nSENS _P_D ET
1
2
3
4
5
6
7
8
9
10
11
12
ADF JOINT PBA
(JC92-0 2426A)
5V
N.C
GND
5V
1
2
3
4
CN10
PARALLEL
PARALLEL
OPTIO N
N.C
GND
GND
DADF_R E GI_S OL
N.C
nSE NS_ DAD F_P _DE T
nSE NS_ DAD F_P _RE G I
DADF_MOT_ S LEE P
nDADF_ MOT_E N
DADF_MOT_ P LS
DADF_MOT_ CUR R EN T
DADF_MOT_ DIR
CN1(1.5 mm)
RADF
N.C
GND
GND
DADF_RE GI_S OL
DADF_MODULE _D ET
nSE NS_DA DF_ P_DE T
nSE NS_DA DF_ P_R EG I
DADF_MOT_ S LEE P
nEN_DA DF_MOT
DADF_MOT_ P LS
DADF_MOT_ CUR R EN T
DADF_MOT_ DIR
CN(1.5 mm)
GND
GND
DADF_P ICKUP_ S OL
nSENS_DADF_COVE R_OP E N
nSE NS_DA DF_ P_P OS
DADF_MOT_ MS1
DADF_MOT_ MS2
24V
5V
DADF_EX IT_SO L
SE NS_DAD F_P_ S IZE
CN(1.5mm )
LED_ANOD E
GND
nSENS_DADF_P _DET
LED_ANOD E
GND
nSENS_DADF_COVE R_OP E N
N.C
1
2
3
4
5
6
7
CN
(1.5m m)
SENS OR
LED_ANOD E
GND
nSENS_DADF_P _POS
LED_ANOD E
GND
nSENS_DADF_P _REG I
1
2
3
4
5
6
CN
(1.5m m)
SENS OR
24V
DADF_P ICKUP_ S OL
1
2
CN(2mm)
PICKUP
SOL
24V
DADF_RE GI_S OL12
CN(1.5mm)
REGI
SOL
24V
N.C
DADF_EX IT_SO L
1
2
3
CN(2mm)
EXIT
SOL
OUT1A
OUT1B
OUT2A
OUT2B
1
2
3
4
CN(2mm)
ADF MOT
CL
CL
CL
MT
STEP
RADF Pa pe r Dete ct
Sen so r
RADF Cove r Op en
Sen so r
RADF Pa pe r Pos
Sen so r
RADF Pa pe r Reg i
Sen so r
RADF Pic k u p
Clutch
RADF Reg i
Clutch
RADF Exit
Clutch
RADF Motor
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
2019181716151413121110
987654321
GND
GND
DADF_RE GI_ SOL
nSENS _ DADF_ P _DET
nSENS _ DADF_ P _REG
nDADF_MO T_S LEE P
nDADF_MO T_EN
DADF_MOT_ P LS
DADF_MOT_ CU RR ENT
DADF_MOT_ DIR
GND
GND
DADF_P ICKUP _ SOL
nSENS_DADF_COVE R_OP EN
nSE NS_ DADF_ P _P OS
DADF_MOT_ MS1
DADF_MOT_ MS2
24V
5V
DADF_EX IT_SO L
GND
GND
DADF_P ICK UP_S OL
nSENS_DADF_COVE R_OP E N
nSE NS_ DAD F_P _P OS
DADF_MOT_ MS1
DADF_MOT_ MS2
24V
5V
DADF_E XIT_SO L
SE NS_D ADF_P _ S IZE
12
11
10
9
8
7
6
5
4
3
2
1
11
10
9
8
7
6
5
4
3
2
1
CN2
(1.5m m)
CN3
(1.5mm )
SIG1
GND
SIG2
GND
SIG3
GND
VDD
VREF
ID
SI
CLK
ILED
LED_B
LED_G
LED_R
GND
VO1
VO2
Tx
GND
Rx
3.3V
nHOOK_ DET
12345
MIC
GND
RCV
3.3V
HOOK_O FF
HOOK PBA
(JC92- 02100 A)
321
54321
3.3V_LSU
nHsy nc
GND
VDO_1 _P
VDO_1_N
GND
nSH_1
nSH_2
GND
VDO_2 _P
VDO_2_N
GND
nLD_ON
LD_PO WER
12
11
10
9
8
7
6
5
4
3
2
1
OUT2B
OUT1B
OUT2A
OUT1A
ANODE_C
ANODE_B
ANODE_A
GND
nSENS _P_P OS
nSENS_C_OP N
GND
nSENS _P_D ET
OUT2B
OUT1B
OUT2A
OUT1A
ANODE_C
ANODE_B
ANODE_A
GND
nSENS _P_P OS
nSENS_C_OPN
GND
nSENS _P_D ET
1
2
3
4
5
6
7
8
9
10
11
12
DF
CW/C CW
CLOCK
READY
START/ST O P
NC
BRAKE
GND
GND
+24V
+24V
321
32132
1
321
32132
1
L
N
FUSER
L
N
CRUM
GND
SCL1
SDA1
3.3V_C RU M
1
2
3
4
CN4
(2mm)
CRUM
Cover
Open
Senso r
3.3V_PS
GND
nSENS_Co_Open
123
CN1(1.5mm)
Cover Open
SENS OR
321
Z-CRUM
N.C
N.C
GND
SCL
3.3V_C RU M
SDA
6
5
4
3
2
1
CRUM I/F PBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
N.C
OPT_n CMDR E Q
N.C
N.C
GND
GND
GND
GND
GND
24V
24V
24V
5V
5V
5V
OPT_n RE S E T
OPT_R XD
OPT_TX D
SCF
DRAWER CN
VBUSDMDP
GND
123
4
CN15
USB_IF
OA :16GB
FALCON : 4GB
EDI
A150 0
EEPR OM
(32KB)
Ser ial Flash
(4MB)
DDR3
(128MB)
2.ProductSpecications
Themaincontrollercontrolsallmodulesrequiredtoprint,thatis,LSU,HVPS,SMPS,F AN,Fuser,etc.
ThemaincontrollerreceivesprintdatafromthehostthroughnetworkorUSBPortorfax,Scanner.Ittakesthisinformation
andgeneratesprintablevideobitmapdata.EngineandVideocontrollerarenotseparated.
ThemaincontrolleradoptstheCHORUS4N(1GHz)CPU,A1500(600MHz),DIMMPBAonDDR3memorytoperform
printingjobssuccessfully.
TheOPEControllerdisplaysthestatusofthesystemusing4.3inchTFTLCDinresponsetouseractionsortheMain
controller.
TheHVPSsupplieshighvoltagefordevelopingprocess.HighV oltagecontrolledbyPWMsignalfromCPU.
SMPSmakes+5Vand+24VDCfrom220Vor110AC.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-26

2.ProductSpecications
MainCircuitBoardLocations
Thefollowingdiagramsshowthelocationsoftheprintercircuitboards:
2-27Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
2.2.5.1.MainController(M337x_M387x_M407xFR_M4072FD)
ProXpressM332xseries/M382xseries/M402xFR/M4072FDmaincontrolleriscomposedwithbelowcomponents.
•A1500:Togeneratetheprintablevideodataandcontrolengine/EmbeddedUSB2.0device
•DDR3SODIMM:256MB
ExternalDDR3SODIMM:512MB(NotsupplyforSL-M4070FX/4075FX)
•EthernetPHY:Networkprinting
•NANDFlash:Programmemory(128MB)
•MicroSDMemory:4GB(SL-M4070FR/4075FRonly)
ThemaincontrollermanagesanElectro-photographysystem,controlsthevideodataofprintingimagesfrommainboard
toLSU,provideshigh-voltagesandPWMs,adjuststemperatureinthefusingsystem,readssensorsignalsandcontrols
SCFoption.
ThemaincontrolleralsocontrolsOPEandN/WPHY ,USBDevice,WirelessModule.
MainControllerDiagram
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-28

2.ProductSpecications
MainControllerconnectioninformation
•Connection
NoDescription
1CoverOpenSensor
(Onlyfor
SL-M3375FD/3875FD/3875FW/4075FR)
2CRUM
3FUSER
4OutbinFull/RearCoverOpen
5ScanMotor
6NETWORK
7USBDevice
8ParallelPWR
9ExitSensor
10Airtemp
11FANSMPS
12MAINMotor
13SCF(option)
14DEBUG
15SMPSSignal
16SMPSPower
NoDescription
17MP
(NotapplyforSL-M3370FD/3375FD)
18LSU
19FANMAIN
20DirectUSB
(OnlyforSL-M3870FD/3875FD/3870FW/
3875FW/4070FR/4075FR)
214LINELCDOPE
22TonerCRUM
(Onlyfor
SL-M3375FD/3875FD/3875FW/4075FR)
23FAXI/F
24WLAN
(OnlyforSL-M3870FW/3875FW)
25CISI/F
26RADFI/F
(Onlyfor
SL-M3870FW/3875FW/4070FR/4075FR)
2-29Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
•PartCodeInformation
-JC92-02603M(M3375FD)
-JC92-02603N(M3370FD)
-JC92-02603P(M3875FD)
-JC92-02603Q(M3870FD)
-JC92-02603R(M3875FW)
-JC92-02603S(M3870FW)
-JC92-02603T(M4070FR)
-JC92-02603A(M4075FR)
-JC92-02603U(M4072FD)
NoDescription
27ADFI/F
(Onlyfor
SL-M3370FD/3375FD/3870FD/3875FD)
28DDR3SODIMM
NoDescription
29HVPS
30SENSORI/F
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-30

2.ProductSpecications
2.2.5.2.MainController(M407xFX)
ProXpressM407xFXseriesmaincontrolleriscomposedwithbelowcomponents.
•C4N:Togeneratetheprintablevideodataandcontrolengine/EmbeddedUSB2.0device.
•A1500:ZCRUMI/F
•DDR3SODIMM:1GBsystemmemory
•EthernetPHY:Networkprinting
•NANDFlash:Programmemory(512MB)
•MicroSDMemory:4GB
Themaincontrollermanagesanelectro-photographysystem,controlstheVideoDataofprintingimagesfrommainboard
toLSU,provideshigh-voltagesandPWMs,adjuststemperatureinthefusingsystem,readssensorsignalsandcontrols
SCFoption.
ThemaincontrolleralsocontrolsOPEandN/WPHY ,USBDevice,fax,scanner.
MainControllerDiagram
2-31Copyright©1995-2013SAMSUNG.Allrightsreserved.

MainControllerconnectioninformation
2.ProductSpecications
•Connection
NoDescription
1OPEIFFFC
2ZCRUM(onlyforSL-M4075NX)
3ZCRUM/EASYCRUM
4FUSER
5SENSORIF
6FAX
7ACISIF
8OUTBINFULL/REARCOVEROPEN
9RADFIF
10EDI
11SCANMOTOR
12ETHERNET
13USBDEVICE
14PARALLELPWR
15DEBUGMAIN
NoDescription
16DEBUGOPE
17EXITSENSOR
18MAINMOTOR
19AIRTEMP
20FANSMPS
21SCF
22SMPSSIGNAL
23SMPSPOWER
24MP
25LSU
26FANMAIN
27HVPS
28COVEROPENSENSOR
29DIRECTUSB
30DDR3SO-DIMM
•PartCodeInformation
-JC92-02621A:PBA-MAIN
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-32

2.ProductSpecications
2.2.5.3.OPEController
TheOPEcontrolleriscomposedofanOPEMICOM,twostatusLED,ECOLED,powerLED,NavigationLED,WPS
LED(SL-M3870FW/3875FWmodelonly),4LineLCD,4.3inchTFTLCD(SL-M407xFXseries),andsomekeys.
OPEcommunicateswithmaincontrollerviaUART/USB.
OPEControllerDiagram
OPEControllerImage
M337xseries
M387xseries
M407xFR
M4072FD
•PartCode:JC92-02522A
PBAName:PBA-OPE(4Line)
•PartCode:JC07-00020A
PBAName:LCD(4Line)
M407xFX
•PartCode:JC92-02597A
PBAName:PBA-OPEMAIN(GUI)
•PartCode:JC07-00017A
PBAName:LCD(4.3inchTFT)
•PartCode:JC92-02524A
PBAName:PBA-KEYSUB
2-33Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
2.2.5.4.SO-DIMMPBA
SO-DIMMPBAisthesystemmemorymoduleofthemaincontroller.Itisusedfortheoperatingsystem,somesystem
applicationprograms,anditstoressomeprintdatafromtheUSBandNetworkport.TherearethreekindsofSO-DIMM
PBA:
•256MB:SL-M3370FD/3375FD/3870FD/3875FD/3870FW/3875FW/4070FR/4075FR/4072FD
•512MB:Option(NotonlyforSL-M4070FX,4075FX)
•1GB:SL-M4070FX/4075FX
•Information
•PartCode
-256MB:JC92–02472A
-512MB:JC92–02472B
-1GB:JC92–02512A
•PartName:PBA-RAMDIMM
2.2.5.5.WLAN(M387xFWmodelonly)
TheWirelessLANModulesupports802.11b/g/natonly3870FW/3875FWmodelviaUSB2.0highspeed.TheModuleis
installedattheUSBHostChannelofmaincontrollerPBA.
•Information
-PartCode:JC92–02510A
-PartName:PBA-WNPC
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-34

2.ProductSpecications
2.2.5.6.ADFandRADFSUBPBA
ProXpressM337x/M387x/407xserieshavetwotypesofdocumentfeeder.
M337xFD/M387xFD/M4072FDmodelusesADFunitandM387xFW/M407xFR/M407xFWmodelusesRADFunit.
•TheADFSUBPBAistheJointBoardtoConnectbetweenADFModuleandMainboard.
-PartCode:JC92-02426A
-PBAName:PBA-ADF
•TheJOINTPBAistheJointBoardtoConnectbetweenRADFModuleandMainboard.
-PartCode:JC92-02353A
-PBAName:PBA-JOINT(RADF)
2.2.5.7.SCFPBA-Optional
TheSCFPBAistheSCFcontrolboard.ItuseUARTcommunicationwithmaincontroller.
UPD70F3824isusedasamicrocontroller .
•Information
-PartCode:JC92-02539B
-PartName:PBA-SCF
2-35Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.2.5.8.CRUMPBA
ProXpressM3370/M3870/M4070/M4072FDseriesusezCRUMPBA.
ProXpressM3375/M3875/M4075seriesusezCRUMPBA,OPCCRUMandCRUMJOINTPBA.
CRUMPBAusesI2Ccommunicationwithmaincontroller.
M3370/M3870/M4070/M4072FDseriesM3375/M3875/M4075series
2.ProductSpecications
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-36

2.ProductSpecications
2.2.5.9.FaxBoard
ProXpressM337xFD,M387xFD,M387xFW ,M407xFR,M4072FDseriescontainsafaxboard.Themodemcardisusedto
transferandreceivefaxdatathroughatelephoneline.ThisPBAiscontrolledbythemainboardandhastwoconnectors,
oneforthetelephonelineconnectionandtheotherforanexternalphoneconnection.
•Connection
1MainInterface
2Speaker
3Hook(onlyChinamodel)
4TelLine
5ExtLine
•Information
-PartCode:JC92–02569A/JC92–02569B(OnlyChinamodel)
-PBAName:PBA-LIU
2-37Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
2.2.5.10.SMPSBoard
TheSMPS(SwitchingModePowerSupply)boardsupplieselectricpowertothemainboardandotherboards.Thevoltage
providedincludes+5V ,and+24Vfroma110V/220Vpowerinput.
•Specication
1)AC110V(93.5V~137V)orAC220V(187V~275V)
2)OutputCurrent:
-+5V:2.4A
-+24V:3A
3)OutputPower
-+5V:8.16W
-+24V:43.2W
4)HeatLampCapacity:850W
•Information
110V220V
SECCODEJC44-00097EJC44-00090E
PBANAMESMPSV1SMPSV2
•Connection
1INPUT_AC
2Fuser_ACOutput
3SMPSControlSignal(fromEnginePBA)
4OUTPUT_5V&24V(toDCPOWERPBA)
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-38

2.ProductSpecications
2.2.5.11.HVPSboard
HighV oltagePowerSupply(HVPS)boardgenerateshigh-voltagechannelswhichincludesMHV ,DEV ,BLADE,SUPPL Y ,
OPC,THVandFUSERBIAS.
•Connection
•Information
1MainInterface
2MHV(-1240V)
3DEV(-338V)
4BLADE(-389V)
5SUPPLY(-489V)
-PartCode:JC44–00197A
-PartName:HVPS
6OPC(-51V)
7THV(+1315V,-1000V)
8FUSERBIAS(240V)
2-39Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
2.2.6.EngineFirmwareControlAlgorithm
2.2.6.1.Feeding
Iffeedingfromacassette,thedriveofthepickuprolleriscontrolledbycontrollingtheclutch.Theon/offoftheclutchis
controlledbycontrollingthegeneraloutputportortheexternaloutputport.Whilepapermoves,occurrenceofJam
isjudgedasbelow.
ItemDescription
JAM0•Afterpickingup,paperdoesnotreachtheFeedSensorwithinapredeterminedtime.
•Afterpickingup,ifthefeedsensorisnoton,re-pickupwillbeinitiated..Afterre-pickingup,ifthe
feedsensorisnotonaftercertaintime,itisJAM0.
•Eventhoughthepaperreachestothefeedsensor,thefeedsensordoesnotdetecttheleadedgeof
thepaper.
JAM1•Aftertheleadingedgeofthepaperpassesthefeedsensor,thetrailingedgeofthepaperdoesnotclear
thesensorafterpredeterminedperiodoftime.
•Aftertheleadingedgeofthepaperpassesthefeedsensor,thepapercannotreachtheexitsensor
afterpredeterminedperiodoftime.
*Thepaperexistsbetweenthefeedsensorandtheexitsensor.
JAM2•Thetrailingedgeofthepaperdoesnotcleartheexitsensorwithinapredetermined.
2.2.6.2.Transfer
Thechargingvoltage,developingvoltageandthetransfervoltagearecontrolledbyPWM(PulseWidthModulation).The
eachoutputvoltageischangeableduetothePWMduty.Thetransfervoltageadmittedwhenthepaperpassesthetransfer
rollerisdecidedbyenvironmentconditions.Theresistancevalueofthetransferrollerischangedduetothesurrounding
environmentortheenvironmentoftheset,andthevoltagevalue,whichchangesduetotheenvironment,ischangedthrough
theADconverter.Thevoltagevalueforimpressingtothetransferrollerisdecidedbythechangedvalue.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-40

2.ProductSpecications
2.2.6.3.Fusing
Thetemperaturechangeoftheheatroller’ssurfaceischangedtotheresistancevaluethroughtheuseofathermistor.
TheMainBoardusestheresistancevalueoftheThermistorandconvertsittoavoltagevaluethroughtheuseofanAD
converter,thetemperatureisdecidedbasedonthevoltagevalueread.TheACpoweriscontrolledbycomparingthetarget
temperaturetothevaluefromthethermistor .Ifthevaluefromthethermistorisoutofcontrollingrangewhilecontrollingthe
fusing,theerrorstatedinthebelowtableoccurs.
•OpenHeatError
Whentheengineoperatesthewarm-upprocess,ifthetemperatureofthexingunitisnothigherthanaspecied
temperaturewithinapredeterminedtime,theenginedenesOpenHeatError.Whenthiserrorisdetected,theengine
stopsallfunctionsandkeepstheerrorstate.Also,theengineinformstheerrorstatusofthemainsystem,soitcantake
appropriateaction;andthentheerrormessageisdisplayedatLCDwindoworLEDinformingtheerrorstatusoftheuser.
•LowHeatError
Whentheengineisatstand-by,printingorwarm-upmode,ifthetemperatureofthexingunitislowerthanthe
speciedtemperatureateachstateandthelowertemperaturestateismaintainedduringthespeciedtime,theengine
denesLowHeatError.Whenthiserrorisdetected,theenginestopsallfunctionsandkeepsitattheerrorstate.Also,
theengineinformstheerrorstatusofthemainsystem,soitcantakeappropriateaction;andthentheerrormessage
isdisplayedatLCDwindoworLEDinformingtheerrorstatusoftheuser.
•OverHeatError
Foroverallenginestate,ifthetemperatureofthexingunitishigherthanthespeciedtemperatureandthetemperature
stateisdetectedforaspecicduration,thentheenginedenesOverHeatError.Whenthiserrorisdetected,theengine
stopsallfunctionsandkeepsitattheerrorstate.Also,theengineinformstheerrorstatusofthemainsystem,soit
cantakeappropriateaction;andthentheerrormessageisdisplayedatLCDwindoworLEDinformingtheerror
statusoftheuser.
2.2.6.4.LSU
LSUreceivestheimagedatafromPVCorHPVCandmakethelatentimageonOPCsurface.Itusesthedualbeam,
LD.TheerrorsrelatedtoLSUareasfollows:
•ByLready
Whentheprintingisstarted,theenginedrivesthepolygonmotorofLSU.Afterthespeciedtimeiselapsed,ifthe
motorisnotinareadystatus,theenginedetectstheerrorthatthepolygonmotorisnotinareadystatus.Ifthiserror
happens,theenginestopsallfunctionsandkeepsitattheerrorstate.Also,theengineinformstheerrorstatusofthe
mainsystemandtheerrormessageisdisplayedatLCDwindoworLEDinformingtheerrorstatusoftheuser .
•ByHsync
Whenthepolygonmotorisready,theLSUsendsoutthesignalcalledHsyncandusedtosynchronizewitheachimage
line.So,iftheenginedoesnotdetectconsecutivelythesignalforaxedtime,itdenestheHsyncError.Ifthiserror
happens,theenginestopsallfunctionsandkeepsitattheerrorstate.Also,theengineinformstheerrorstatusofthe
mainsystemandthentheerrormessageisdisplayedatLCDwindoworLEDinformingtheerrorstatusoftheuser.LSU
ErrorRecovery:IftheLReadyorHsyncerrorhappens,thepaperisexitedbeforetheerrorcodeisinitiated.Theengine
modeischangedtorecoverymodeandtheengineinformsthemainsystemoftheenginemode.Theenginerechecks
theLSUerror,iftheerrordoesnotreoccurprintingisresumed.
2-41Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.2.7.SoftwareDescriptions
P r in te r /MFP
HOS T
S o ftwa r e
Driv e r
Web -b a s e d
App lic atio n
S ta n d -a lo n e
App lic atio n
Fi rm wa re
App lic atio n
(Em ula tio n )
Ker n e l
2.2.7.1.Softwaresystemoverview
Thesoftwaresystemofthismodelisconstructedwith
•HostSoftwarepartthattheapplicationsoftwareoperatedinWindowandWebEnvironment
•FirmwarepartsthatisaEmbeddedsoftwarecontrolsprintingjob.
2.2.7.2.Architecture
2.ProductSpecications
HostSoftwareismadeupof
1)GraphicUserInterfaceoffersthevariouseditingfunctionstouserinHost.
2)DrivertranslatesthereceiveddocumenttoaPrintingCommandlanguagewhichprintercanunderstandandtransfers
datatospooler.
3)Stand-aloneApplicationoffersthevariousprintingapplicationsuchasEasyPrinterManager,PrinterStatusinWindow
system.
4)Web-based-ApplicationoffersthesamefunctionsasStand-aloneApplicationinW ebenvironment.
Firmwareismadeupof
1)Application(Emulation)thatisainterpretertranslatesdatareceivedfromHosttoaprintinglanguage(PCL,PS,GDI,
etc.)tobeabletomaketheusertotakesameoutputasoriginallyonewhatcomposedinHost.
2)KernelcontrolsandmanagethewholeprocedureincludingControlowandPrintingJobbeforetransferringtoEngine
system.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-42

2.ProductSpecications
Drive r
- PCL3, PS 3
Web -b a s e d
- Do c ument Manag e m e nt
S ys te m
- Netwo rk Ad m inis tration
- S ta tus Monito r
- Re m o te Co ntrol Pa ne l
S t a n d -a lo n e
- P rinter S etting Utility
- Netwo rk Ad m inis tration
- S ta tus Monito r
Q
Q
p
p
s
s
uu
N
N
p
p
o
o
jj
u
u
p
p
s
s
Netwo r k
Interfa c e
App lic a tio n
KERNEL
App lic a tio n
(Em ulatio n )
- P CL
- P S 3
En g in e
US B
Ho s t Firm w a re
2.2.7.3.DataandControlFlow
TheaboveBlockDiagramisexplainedthat:
HostSideismadeupof
1)DriverthatisWindowsapplicationsoftwaretranslateprinteddatatooneofprinterlanguageandcreatespoolerle.
2)Web-basedApplicationthatofferavariousprinteradditionalfunctions,managementofprintingjob,printer
administration,StatusmonitortomonitoringtheprinterstatusbyrealtimeinW eb,independentenvironmentonOS.
3)Stand-aloneApplicationthatisasimilarWindowsoftwareassameasabove2.
4)PortMonitorthatmanagesthenetworkcommunicationbetweenspoolerandNetworkInterfaceCard,orvarious
additionalapplicationandNetworkInterfaceCard,(thisis,atrst,makecommunicationlogicalport,managethedata,
transferthemfromspoolertonetworkport,andoffertheresultofprinting).
FirmwareSideismadeupof
1)NetworkInterfaceCardisthatrelaythecommunicationbetweenHostandkernelusingvariousnetworkprotocol.
2)Kernelisthatmanagestheowcontrolofemulationprocedure,receivingdatafromHostorNetworkcardandprinting
withengine&renderingjob.
2-43Copyright©1995-2013SAMSUNG.Allrightsreserved.

2.ProductSpecications
3)Emulationisthatinterpretsthevariousoutputdatafromselectedemulation.
4)Engineisthatprintsrenderedbit-mapdatatopaperwithrequiredsizeandtypebyKernel.
Andthen,forJobSpoolingfunctionforMulti-User,Multi-PrintingthatisoccurredinNetworkprintingandvarious
additionalprintingfunctions,thisKernelusemax.10Queuingsystemsinamemory.
InPrinting,thetwoproceduresare
1)CaseofusingUSBPort
•AfteruserstarttoprintthewanteddocumenttoPCLstringorcompressedGDIbit-mapdata,theDrivertranslates
theallgraphicdataoftheclientPCandsenddatatohostspooler .Andthenthespoolersendsthedatastreamto
theprinterviaUSBport.
•KernelreceivesthisdatafromHost,andthenselectemulationttodataandstartselectedone.Afteremulationjob
end,Kernelsendstheoutputbit-mapdatatoEngineusingPrinterVideoController(byclocktypeforLSU).
•Engineprintthereceiveddatatorequiredpaperwiththesequentialdevelopingprocess.
2)CaseofusingNetworkInterfaceCard
•AfteruserstarttoprintthewanteddocumenttoPCLstringorcompressedGDIbit-mapdata,Drivertranslatethe
allgraphicdataofitandsenddatatohostspooler.
•Ifso,PortmonitormanagingnetworkportreceivesdatafromspoolerandsendsadatastreamtotheNetwork
InterfaceCard.
•NetworkinterfacecardreceivesitandsendtoKernelpart.
•KernelreceivesthisdatafromHost,andthenselectemulationttodataandstartselectedone.Afteremulationjob
end,Kernelsendstheoutputbit-mapdatatoEngineusingPrinterVideoController(byclocktypeforLSU).
•Engineprintthereceiveddatatorequiredpaperwiththesequentialdevelopingprocess.
Copyright©1995-2013SAMSUNG.Allrightsreserved.2-44

3.DisassemblyandReassembly
3.DisassemblyandReassembly
3.1.Precautionswhenreplacingparts
3.1.1.Precautionswhenassemblinganddisassembling
•UseonlyapprovedSamsungspareparts.Ensurethatpartnumber,productname,anyvoltage,currentortemperature
ratingarecorrect.Failuretodosocouldresultindamagetothemachine,circuitoverload,reorelectricshock.
•Donotmakeanyunauthorizedchangesoradditionstotheprinter,thesecouldcausetheprintertomalfunctionand
createelectricshockorrehazards.
•Takecarewhendismantlingtheunittonotewhereeachscrewgoes.Thereare19differentscrews.Useofthewrong
screwcouldleadtosystemfailure,shortcircuitorelectricshock.
•DonotdisassembletheLSUunit.Onceitisdisassembleddustisadmittedtothemirrorchamberandwillseriously
degradeprintquality .Therearenoserviceablepartsinside.
•Regularlychecktheconditionofthepowercord,plugandsocket.Badcontactscouldleadtooverheatingandrfe.
Damagedcablescouldleadtoelectricshockorunitmalfunction.
3.1.2.PrecautionswhenhandlingPBA
StaticelectricitycandamageaPBA,alwaysusedapprovedanti-staticprecautionswhenhandlingorstoringaPBA.
•PrecautionswhenmovingandstoringPBA
1)PleasekeepPBAinaconductivecase,anti-staticbag,orwrappedinaluminumfoil.
2)DonotstoreaPBAwhereitisexposedtodirectsunlight.
•PrecautionswhenreplacingPBA
1)Disconnectpowerconnectorsrst,beforedisconnectingothercables.
2)Donottouchanysolderedconnections,connectorterminalsorotherelectronicpartswhenhandlinginsulatedparts.
•PrecautionswhencheckingPBA
1)BeforetouchingaPBA,pleasetouchothergroundedareasofthechassistodischargeanystaticelectricalcharge
onthebody.
2)TakecarenottotouchthePBAwithyourbarehandsormetalobjectsasyoucouldcreateashortcircuitorgetan
electricshock.TakeextracarewhenhandlingPBAswithmovingpartsttedsuchassensors,motorsorlampsas
theymaygethot.
3)Takecarewhentting,orremoving,screws.Lookoutforhiddenscrews.Alwaysensurethatthecorrectscrewis
usedandalwaysensurethatwhentoothedwashersareremovedtheyarerettedintheiroriginalpositions.
3-1Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.DisassemblyandReassembly
3.1.3.ReleasingPlasticLatches
Manyofthepartsareheldinplacewithplasticlatches.Thelatchesbreakeasily;releasethemcarefully .
Toremovesuchparts,pressthehookendofthelatchawayfromtheparttowhichitislatched.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-2

3.DisassemblyandReassembly
3.2.Screwsusedintheprinter
Thescrewslistedinthetablebelowareusedinthisprinter.Pleaseensurethat,whenyoudisassembletheprinter,youkeep
anoteofwhichscrewisusedforwhichpartandthat,whenreassemblingtheprinter,thecorrectscrewsareusedinthe
appropriateplaces.
PartCodeLocationDescriptionQty
6002-000440DUPLEXSCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A4
6002-000440FUSERSCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A4
6003-000196FUSERSCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A5
6003-000269FUSERSCREW-T APTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-2
6003-000196FRAMESCREW-TAPTYPE;PWH,+,B,M3,L10,NIPL T ,SWRCH18A14
6003-000196MPSCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A2
6003-000269DRIVESCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-6
6003-000196FRAME-ETCSCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A40
6003-000269FRAME-ETCSCREW-T APTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-1
6003-000301FRAME-ETCSCREW-T APTYPE;BH,+,S,M4,L6,ZPC(WHT),SWRCH18A1
6003-001474FRAME-ETCSCREW-T APTYPE;BH,+,B,M3,L30,ZPC(WHT),SWRCH18A1
6006-001078FRAME-ETCSCREW-T APTYPE;PH,+,WSP ,B,M3,L10,ZPC(WHT),SWRCH18A1
6003-000283COVER-FRONTSCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(WHT),SWRCH18A,-6
6003-000264MP-GUIDETRA YSCREW-TAPTYPE;PWH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,-1
6003-000196COVER-MIDDLE
UPPERRADF
6003-000196COVER-MIDDLE
LOWER
6003-000283CARTRIDGE
SUB-DRUMUNIT
6003-000283CARTRIDGE
SUB-DEVEUNIT
6003-000283LSUSCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(WHT),SWRCH18A,-5
6002-000440SCANNERSCREW-TAPPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A9
6002-000440PLATENSCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A5
6002-000440PLATEN-UPPER
DADF
6002-000440PLATEN-FRAMESCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A4
6003-000269PLATEN-DRIVETRAIN SCREW-T APTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-2
SCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A1
SCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A13
SCREW-T APTYPE;BH,+,-,B,M3,L8,ZPC(WHT),SWRCH18A,-6
SCREW-T APTYPE;BH,+,-,B,M3,L8,ZPC(WHT),SWRCH18A,-2
SCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A3
6002-000440PLATEN-LOWER
RADF
6001-000130DADFSCREW-MACHINE;BH,+,M3,L6,ZPC(WHT),SWRCH18A1
6003-000196DADFSCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A23
6003-000269DRIVE-DADFSCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-6
6003-000196DADF-COVER
OPEN
6001-000130DADF-PLATENSCREW-MACHINE;BH,+,M3,L6,ZPC(WHT),SWRCH18A1
3-3Copyright©1995-2013SAMSUNG.Allrightsreserved.
SCREW-T APPING;PWH,+,2,M3,L8,ZPC(BLK),SWRCH18A1
SCREW-T APTYPE;PWH,+,B,M3,L10,NIPLT,SWRCH18A2

3.DisassemblyandReassembly
PartCodeLocationDescriptionQty
6003-000196DADF-LOWERSCREW -T APTYPE;PWH,+,B,M3,L10,NIPLT ,SWRCH18A2
6003-000196DADF-UPPERSCREW-TAPTYPE;PWH,+,B,M3,L10,NIPL T ,SWRCH18A3
6003-000196OPESCREW-TAPTYPE;PWH,+,B,M3,L10,NIPL T ,SWRCH18A8
6003-000196MAINLINESCREW-TAPTYPE;PWH,+,B,M3,L10,NIPL T ,SWRCH18A30
6003-000269MAINLINESCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-8
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-4

3.DisassemblyandReassembly
3.3.ReplacingtheMainSVCparts
3.3.1.LeftandRightCover
1.Removethecassette.
2.Openthefrontandrearcover.
3.Removetheleftcoverbyreleasinghooks.
4.Removetherightcoverbyreleasinghooks.
3-5Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.2.FrontCover
3.DisassemblyandReassembly
1.Removethecassette.
2.Removetherightcoverbyreleasinghooks.
3.Unplugtheconnectorconnectingthefrontcover.
4.Removethefrontcoverbyreleasingbothhooks.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-6

3.DisassemblyandReassembly
3.3.3.ADForRADFUnit
NOTE
•ADFUnit:XpressPlusM337xFD,M387xFD,
M4072FD
•RADFUnit:XpressPlusM387xFW ,M407xFR,
M407xFX
1.OpenADF/RADFUnit.
2.Removetheconnectorcover.
3.Unplugtheconnector.
4.LiftupandreleasetheADF/RADFUnit.
3-7Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.4.OPEUnit
3.DisassemblyandReassembly
1.RemovetheADF/RADFUnit.(Referto3.3.3)
2.PullupthefrontoftheOPEUnit.
3.UnplugtheconnectorsfromtheOPEunit.
4.ReleasetheOPEboardafterremovingthescrews.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-8

3.DisassemblyandReassembly
3.3.5.PlatenUnit
1.Removetherightcover.(Referto3.3.1)
2.RemovetheADF/RADFUnit.(Referto3.3.3
3.RemovetheOPEUnit.(Referto3.3.4)
4.Unplugthescannerconnectorsfromthemainboard.
5.Removethescrewcap.
7.Remove2screwsfromtherear.
)
8.Liftupandretheplatenunit.
6.Remove3screws.
NOTE
WhenreassemblingtheplatenunitforM4072FD,putit
onthemiddlecoverandpullittotheback.
3-9Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.6.T op-MiddleCover
3.DisassemblyandReassembly
1.Removetheleftandrightcover.(Referto3.3.1)
2.RemovethePlatenUnit.(Referto3.3.5)
3.Remove7screws.
4.Remove2screws.
5.Removethereardummycover.
6.Liftupandreleasethetop-middlescover.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-10

3.DisassemblyandReassembly
3.3.7.FaxBoard
1.Removethetop-middlecover.(Referto3.3.6)
2.Removethefaxcoverafterremoving2screws.
3.Remove1screw.
4.Unplugtheconnectorandatcable.
5.Removethefaxboard.
3-11Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.8.MiddleandInnerCover
3.DisassemblyandReassembly
1.Removethetop-middlecover.(Referto3.3.6)
2.Remove2screwsfromthefront.
3.Remove2screwsfromtherear.
4.Liftupandreleasethemiddlecover.
5.Removethetop-innercoverafterremoving4screws.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-12

3.DisassemblyandReassembly
3.3.9.MainBoard
1.Removetherightcover.(Referto3.3.1)
2.Unplugallconnectorsonthemainboard.
3.Remove4screws.
3.3.10.HVPSboard
1.Removetherightcover.(Referto3.3.1)
2.Remove5screws.
4.Releasethemainboard.
4.ReleasetheHVPSboard.
3.UnplugtheconnectorontheHVPSboard.
3-13Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.11.SMPSBoard
3.DisassemblyandReassembly
1.Removetherightcover.(Referto3.3.1)
2.UnplugallconnectorsontheSMPSboard.
3.Remove4screws.
3.3.12.LaserScanningUnit(LSU)
1.Removethemiddlecover.(Referto3.3.8)
2.Unplug2atcablesfromtheLSU.
3.Remove3screws.
4.ReleasetheSMPSboard.
4.ReleasetheLSU.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-14

3.DisassemblyandReassembly
3.3.13.FuserUnit
CAUTION
Thetemperaturegetshighinthevicinityofthefuserunit.
Whenreplacingit,youmaygetburned.Beforereplacing
it,makesurethatfuserunithascooled.
1.Removetherearcover.
2.OpentheFrame-Rearbypushingbothgreenpoints.
3.RemovetheFrame-Rearbyreleasingbothhooks.
4.Removetheexitsensorholderafterremoving2screws.
5.Remove4screws.
6.Releasethefuserunit.
CAUTION
Whenreassemblingthefuserunit,donotforgetto
tightenthesescrews.
3-15Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.14.MainDriveUnit
1.Removetheleftcover.(Referto3.3.1)
2.RemovetheBarcoupler.
3.Removethemaindriveunitafterremoving6screws.
3.DisassemblyandReassembly
NOTE
Whenreassemblingthemaindriveunit,tighten6screws
inorderasshownabove.
4.Unplugtheconnectorformthemainmotor.
5.Releasethemaindriveunit.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-16

3.DisassemblyandReassembly
3.3.15.FeedDriveUnit
1.Removethemaindriveunit.(Referto3.3.14)2.Releasethefeeddriveunitafterremoving2screwsand
1E-ring.
3.3.16.PickUp_Regi_MPClutch
1.Removethefeeddriveunit.(Referto3.3.15)
2.Fortheclutchtorequirereplacement,unplugthe
connectorthenreplaceit.
3-17Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.17.Pick-UpRoller
3.DisassemblyandReassembly
1.Removethecassette.
2.Removetheduplexunit.
3.Pullthesmalltapdown,thenreleasethepickuproller.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-18

3.DisassemblyandReassembly
3.3.18.TransferRoller
1.Removethemiddlecover.(Referto3.3.8)
2.Removethetop-innercoverafterremoving4screws.
3.ReleasetheLSUbracketafterremoving4screws.
4.Pushthetransferrollerholdertothecenterandrelease
it.
5.Removethetransferroller.
3-19Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.19.MPUnit
1.Removetheright/frontcover .(Referto3.3.1~3.3.2)
3.DisassemblyandReassembly
2.Removethemiddleandinnercover.(Referto3.3.8
3.Remove3screws.
4.UnplugtheconnectorthenreleasetheMPunit.
)
5.SeparatetheMPlowerfromtheMPupper.
3.3.20.Bin-fullsensor
1.Removethemiddlecover.(Referto3.3.8)
2.Releasethebin-fullsensorafterunpluggingthe
connector.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-20

3.DisassemblyandReassembly
3.3.21.Regi_Feed_EmptySensor
1.Removethecassetteandduplexunit.
2.RemovethePLA TE-FRAMEBOTTOMafterremoving
4screws.
3.Removethesensorcoverafterremoving2screws.
5.Removethesensorcoverafterremoving2screws.
6.Unplugtheconnectorthenreleasetheemptysensor.
4.Forthesensortorequirereplacement,unplugthe
connectorthenreplaceit.
3-21Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.22.ReverseRoller
3.DisassemblyandReassembly
1.Removethecassette.
2.OpentheCOVER-CASSETTE.
3.ReleasethereverserollerAssy.
4.Releasethereverserollerfromitsholder.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-22

3.DisassemblyandReassembly
3.3.23.SCF(SecondCassetteFeeder)Unit
3.3.23.1.SCFRightCover
1.Remove2screws.2.ReleasetheSCFrightcover.
3.3.23.2.SCFMainBoard
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.UnplugallconnectorsonSCFmainboard.
3.Remove4screws.
4.ReleasetheSCFmainboard.
3-23Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.23.3.SCFMainMotor
3.DisassemblyandReassembly
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.Unplugthemotorconnector.
3.Remove4screws.
3.3.23.4.SCFClutch
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.Unplugtheclutchconnector.
3.Remove2E-Ringsand2Bushes.
4.ReleasetheSCFmainmotor.
6.RemovetheSCFclutch.
4.Remove2screws.
5.Releasetheclutchbracket.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-24

3.DisassemblyandReassembly
3.3.23.5.SCFpickup_forwardroller
1.RemovetheSCFcassette.
2.SeethebottomoftheSCFUnit.
3.3.23.6.SCFReverseRoller
1.RemovetheSCFcassette.
2.Openthecassettecover.
3.Releasethepickup/forwardrollerwhilepullingthe
smalltap.
3.Releasethereverserollerwhilepullingthesmalltap.
3-25Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.3.23.7.SCFMainDriveUnit
3.DisassemblyandReassembly
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.RemovetheSCFclutchbracket.(Referto3.3.23.4)
3.Unplugthemainmotorconnector.
4.Remove4screws.
3.3.23.8.SCFLiftAssy
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.RemovetheSCFmainboard.(Referto3.3.23.2
3.Opentheharnessclamp.
)
5.RemovetheSCFmaindriveunit.
5.ReleasetheSCFLiftAssy.
4.Remove4screws.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-26

3.DisassemblyandReassembly
3.3.23.9.SCFPick-UpUnit
1.RemovetheSCFrightcover.(Referto3.3.23.1)
2.RemovetheSCFmaindriveunit.(Referto3.3.23.7)
3.Unplugtheconnectorsfromtherightside.
4.Removethefrontcover.
5.Remove4screws.
6.ReleasetheSCFPick-UpUnit.
3-27Copyright©1995-2013SAMSUNG.Allrightsreserved.

3.DisassemblyandReassembly
3.3.23.10.SCFPick-Up_Empty_FeedSensor
1.RemovetheSCFPick-UpUnit.(Referto3.3.23.9)2.Removethesensorafterunpluggingtheconnector.
Copyright©1995-2013SAMSUNG.Allrightsreserved.3-28

4.AlignmentandTroubleshooting
4.AlignmentandTroubleshooting
4.1.AlignmentandAdjustments
Thischapterdescribesthemainfunctionsforservice,suchastheproductmaintenancemethod,thetestoutputrelatedto
maintenanceandrepair,Jamremovingmethod,andsoon.
4.1.1.ControlPanel
NOTE
•Thiscontrolpanelmaydifferfromyourmachinedependingonitsmodel.Therearevarioustypesofcontrolpanels.
•Somefeaturesandoptionalgoodsmaynotbeavailabledependingonmodelorcountry
•Somebuttonsmaynotworkdependingonthemode(copy,fax,orscan).
M337xFD/M337xHD/M387xFD/M387xFW/M387xHD/M407xFD/M407xFR/M407xHR
1IDCopyAllowsyoutocopybothsidesofanIDcardlikeadriver’slicense
onasinglesideofpaper
2
3DisplayscreenShowsthecurrentstatusandpromptsduringanoperation.
DarknessAdjuststhebrightnessleveltomakeacopyforeasierreading,when
theoriginalcontainsfaintmarkingsanddarkimages.
WPSConguresthewirelessnetworkconnectioneasilywithoutacomputer
4CopySwitchestoCopymode.
5FaxSwitchestoFaxmode.
6ArrowsScrollthroughtheoptionsavailableintheselectedmenu,andincrease
ordecreasevalues.
7OKConrmstheselectiononthescreen.
8NumerickeypadDialsanumberorentersalphanumericcharacters
4-1Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.AlignmentandTroubleshooting
9AddressBookAllowsyoutostorefrequentlyusedfaxnumbersorsearchforstored
faxnumbers.
10Redial/PauseRedialstherecentlysentfaxnumberorreceivedcallerIDinready
mode,orinsertsapause(-)intoafaxnumberineditmode.
11Stop/ClearStopscurrentoperation.
12Power/WakeupTurnsthepoweronoroff,orwakesupthemachinefromthepower
savemode.Ifyouneedtoturnthemachineoff,pressthisbuttonfor
morethanthreeseconds.
13StartBeginsaprintingjobincolormode.
14PowerSaverGoesintoasleepmode.
15OnHookDialWhenyoupressthisbutton,youcanhearadialtone.Thenenterafax
number.Itissimilartomakingacallusingspeakerphone.
16BackSendsyoubacktotheuppermenulevel.
17MenuEntersMenumodeandscrollsthroughtheavailablemenus.
18ScanSwitchestoScanmode.
19StatusLEDIndicatesthestatusofyourmachine.
20
Reduce/EnlargeYoucanreduceorenlargethesizeofacopiedimagefrom25%to
400%whenyoucopyoriginaldocumentsfromthescannerglass.
DirectUSBAllowsyoutodirectlyprintlesstoredonaUSBmemorydevice
whenitisinsertedintotheUSBportonthefrontofyourmachine.
21EcoTurnintoecomodetoreducetonerconsumptionandpaperusage
whenpc-printingandcopyingonly.
M407xFX
NOTE
Whenusingthetouchscreen,onlyuseyournger.Sharpobjectscandamagethescreen.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-2

4.AlignmentandTroubleshooting
1TouchscreenDisplaysthecurrentstatusandallowsyoutoaccessavailablemenus.
2NumerickeypadDialsanumberorentersalphanumericcharacters.
3ClearDeletescharactersintheeditarea.
4StopStopsanoperationatanytime.
5Power/WakeUpTurnsthepoweronoroff,orwakesupthemachinefromthepowersavemode.
Ifyouneedtoturnthemachineoff,pressthisbuttonformorethanthreeseconds.
6StartStartsajob.
7OnHookDialWhenyoupressthisbutton,youcanhearadialtone.Thenenterafaxnumber .
Itissimilartomakingacallusingspeakerphone.
8HelpGivesdetailedinformationaboutthismachine’smenusorstatus.
9ResetResetsusersettingforajobtodefaultvalue.
10StatusLEDIndicatesthestatusofyourmachine.
4-3Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.AlignmentandTroubleshooting
4.1.2.UnderstandingTheStatusLED
ThecoloroftheStatusindicatesthemachine’scurrentstatus.
NOTE
•SomeLEDsmaynotbeavailabledependingonmodelorcountry
•T oresolvetheerror,lookattheerrormessageanditsinstructionsfromthetroubleshootingpart.
•Y oualsocanresolvetheerrorwiththeguidelinefromthecomputers’sSamsungPrintingStatusprogramwindow.
LEDStatusDescription
Status
Off•Themachineisoff-line.
•Themachineisinpowersavemode.
BlinkingWhenthebacklightblinks,themachineisreceivingorprintingdata. Green
OnThemachineison-lineandcanbeused.
Red
Blinking•Aminorerrorhasoccurredandthemachineiswaitingfortheerrorto
becleared.Checkthedisplaymessage.Whentheproblemiscleared,
themachineresumes.
•Smallamountoftonerisleftinthecartridge.Theestimatedcartridge
lifeaoftonerisclose.Prepareanewcartridgeforreplacement.Y ou
maytemporarilyincreasetheprintingqualitybyredistributingthe
toner.
On•Atonercartridgehasalmostreacheditsestimatedcartridgelife.Itis
recommendedtoreplacethetonercartridge.
•Thecoverisopened.Closethecover.
•Thereisnopaperinthetraywhenreceivingorprintingdata.Load
paperinthetray.
•Themachinehasstoppedduetoamajorerror.Checkthedisplay
messageandrefertotroubleshootingchapter.
•Apaperjamhasoccurred.
•Animagingunithasalmostreacheditsestimatedlife.Itis
recommendedtoreplacetheimagingunit.
NOTE
M3375/3875/4075serieshaveseparatetypeofcartridge.
WirelessBlue
Blue
Wakeup
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-4
BlinkingThemachineisconnectingtoawirelessnetwork.
OnThemachineisconnectedtoawirelessnetwork.
OffThemachineisdisconnectedfromawirelessnetwork.
OnThemachineisinpowersavemode. Power/
OffThemachineisinreadymodeormachine’spowerisoff.
OnEcomodeison. EcoGreen
OffEcomodeisoff.

4.AlignmentandTroubleshooting
NOTE
1)Estimatedcartridgelifemeanstheexpectedorestimatedtonercartridgelife,whichindicatestheaveragecapacityof
print-outsandisdesignedpursuanttoISO/IEC19798.Thenumberofpagesmaybeaffectedbyoperatingenvironment,
percentageofimagearea,printinginterval,graphics,mediaandmediasize.Someamountoftonermayremaininthe
cartridgeevenwhenredLEDisonandtheprinterstopsprinting.
2)SomeLEDsmaynotbeavailabledependingonmodelorcountry.
3)Whentheimagingunithasreacheditsendoflife,themachinewillstopprinting.Inthiscase,youcanchoosetostop
orcontinueprintingfromtheSyncThru™WebService(Settings>MachineSettings>System>Setup>Supplies
Management)orSamsungEasyPrinterManager(DeviceSettings>System>SuppliesManagement).Turningoffthis
optionandcontinuingtoprintmaydamagethedevice’ssystem.
4-5Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.1.3.ClearingJams
4.1.3.1.Clearingoriginaldocumentjams
NOTE
Illustrationsonthisuser’sguidemaydifferfromyour
machinedependingonitsoptionsormodels.Checkyour
machinetype.
Originalpaperjaminfrontofscanner
4.AlignmentandTroubleshooting
1)Openthedocumentfeedercover.
2)Gentlyremovetheoriginalcarefullyfromthedocument
feeder.
3)Closethedocumentfeedercover.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-6

4.AlignmentandTroubleshooting
Originalpaperjaminsideofscanner
1)Openthedocumentfeedercover.
2)Gentlyremovetheoriginalcarefullyfromthedocument
feeder.
3)Closethedocumentfeedercover.
Ifyouseenopaperinthisarea,gotonextstep.
4)Openthedocumentfeeder.
5)Graspthemisfeedoriginal,andremovethepaperfrom
thefeedareabycarefullypullingit.
4-7Copyright©1995-2013SAMSUNG.Allrightsreserved.

6)Closethedocumentfeeder.
Originalpaperjaminexitareaofscanner
4.AlignmentandTroubleshooting
1)Liftupthestacker.
2)Gentlyremovetheoriginalcarefullyfromthedocument
feeder.
3)Pulldownthestacker.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-8

4.AlignmentandTroubleshooting
Originalpaperjaminscannerduplexpath
1)Openthedocumentfeedercover.
2)Opentheduplexjamcover.
3)Pulltheoriginaldocumentgentlyoutofthedocument
feeder.
4)Closetheduplexjamcoveranddocumentfeedercover.
4-9Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.1.3.2.Clearingpaperjams
NOTE
Toavoidtearingthepaper,pullthejammedpaperoutslowly
andgently.
Intray1
4.AlignmentandTroubleshooting
1)Pullouttray1.
2)Removethejammedpaperbygentlypullingitstraight
out.
3)Inserttray1backintothemachineuntilitsnapsinto
place.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-10

4.AlignmentandTroubleshooting
Inoptionaltray
1)Pulloutoptionaltray2.
2)Removethejammedpaperfromthemachine.
3)Inserttray2backintothemachineuntilitsnapsinto
place.
Ifyoudonotseethepaperinthisarea,stopandgoto
nextstep:
4)Pullouttray1.
5)Pullthepaperstraightupandout.
4-11Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.AlignmentandTroubleshooting
6)Insertthetray1backintothemachine.
Ifyoudonotseethepaperinthisarea,stopandgoto
nextstep:
7)Opentherearcover.
8)Removethejammedpaper.
9)Closetherearcover.
Inthemulti-purpose(ormanualfeeder)tray
1)Ifthepaperisnotfeedingproperly ,pullthepaperout
ofthemachine.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-12
2)Openandclosethefrontcover.

4.AlignmentandTroubleshooting
Insidethemachine(M3370/M3870/M4070M4072FDseries)
1)Openthefrontcover.
2)Pullthetonercartridgeout.
4)Insertthetonercartridge.
5)Closethefrontcover.
3)Removethejammedpaperbygentlypullingitstraight
out.
4-13Copyright©1995-2013SAMSUNG.Allrightsreserved.

Insidethemachine(M3375/M3875/M4025series)
4.AlignmentandTroubleshooting
NOTE
1)Openthefrontcover.
2)Pulloutthetonercartridgeandimagingunit.
4)Inserttheimagingunitandtonercartridge.
5)Closethefrontcover.
3)Removethejammedpaperbygentlypullingitstraight
out.
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-14

4.AlignmentandTroubleshooting
Inexitarea
NOTE
Thefuserareaishot.T akecarewhenremovingpaperfrom
themachine.
1)Removethejammedpaperbygentlypullingitstraight
out.
Ifyoudonotseethepaperinthisarea,stopandgoto
nextstep:
3)Removethejammedpaperbygentlypullingitstraight
out.
4)Closetherearcover.
2)Opentherearcover.
Intheduplexunitarea
1)Pulltheduplexunitoutofthemachine.
4-15Copyright©1995-2013SAMSUNG.Allrightsreserved.

4.AlignmentandTroubleshooting
2)Removethejammedpaperfromtheduplexunit.
Ifthepaperdoesnotcomeoutwiththeduplexunit,
removethepaperfromthebottomofthemachine.
5)Pulldownthebothfuserlevers.
6)Openthefuserjamcover.
3)Inserttheduplexunitintothemachine.
notseethepaper,gotothenextstep.
4)Opentherearcover.
7)Removethejammedpaperbygentlypullingitstraight
out.
Ifyoustilldo
Copyright©1995-2013SAMSUNG.Allrightsreserved.4-16

4.AlignmentandTroubleshooting
8)Closethefuserjamcover.
9)Pullupthebothfuserlevers.
10)Closetherearcover.
4-17Copyright©1995-2013SAMSUNG.Allrightsreserved.