Samsung ML-295x Service Manual

MonoLaserPrinter

ML-295xseries ML-295xD/295xND/2955DW

MANUAL

SERVICE

MonoLaserPrinter

1.Precautions

2.ProductSpecicationsandDescription

3.DisassemblyandReassembly

4.Troubleshooting

5.SystemDiagrams

6.SchematicDiagrams

Contents

RefertotheservicemanualintheGSPN(seetherearcover)formoreinformation.

Contents

1.Precautions......................................................................................................................................1−1

1.1.Safetywarning........................................................................................................................1−1

1.2.Cautionforsafety....................................................................................................................1−2

1.2.1.Toxicmaterial.............................................................................................................1−2

1.2.2.Electricshockandresafetyprecautions.........................................................................1−2

1.2.3.Handlingprecautions...................................................................................................1−3

1.2.4.AssemblyandDisassemblyprecautions...........................................................................1−3

1.2.5.Disregardingthiswarningmaycausebodilyinjury............................................................1−4

1.3.ESDprecautions......................................................................................................................1−5

2.ProductSpecicationsandDescription..................................................................................................2−1

2.1.ProductSpecications..............................................................................................................2−1

2.1.1.ProductOverview........................................................................................................2−1

2.1.2.Specications.............................................................................................................2−2

2.1.2.1.GeneralPrintEngine......................................................................................2−2

2.1.2.2.ControllerandSoftware..................................................................................2−2

2.1.2.3.PaperHandling.............................................................................................2−4

2.1.2.4.Consumables................................................................................................2−5

2.1.2.5.ReliabilityandService...................................................................................2−5

2.1.2.6.Environment................................................................................................2−5

2.1.2.7.Options.......................................................................................................2−6

2.1.2.8.Maintenanceparts.........................................................................................2−6

2.1.3.ModelComparisonTable..............................................................................................2−7

2.2.SystemOverview.....................................................................................................................2−8

2.2.1.FrontV iew.................................................................................................................2−8

2.2.2.RearV iew..................................................................................................................2−9

2.2.3.PaperPath..................................................................................................................2−10

2.2.4.SystemLayout............................................................................................................2−11

2.2.4.1.FeedingPart.................................................................................................2−12

2.2.4.2.TransferRoller.............................................................................................2−13

2.2.4.3.DriveUnit...................................................................................................2−13

2.2.4.4.Fuser..........................................................................................................2−14

2.2.4.5.LSU(LaserScannerUnit)...............................................................................2−15

2.2.4.6.TonerCartridge.............................................................................................2−16

2.2.5.Hardwareconguration................................................................................................2−17

2.2.5.1.Mainboard..................................................................................................2−18

2.2.5.2.OPEboard...................................................................................................2−20

2.2.5.3.WirelessLANboard(ML-2955DWonly)..........................................................2−21

2.2.5.4.JointPBA....................................................................................................2−22

Contents

2.2.5.5.SMPSBoard................................................................................................2−23

2.2.5.6.HVPSBoard................................................................................................2−25

2.2.5.7.ElectricalPartsLocation.................................................................................2−26

2.2.6.EngineF/WControlAlgorithm......................................................................................2−28

2.2.6.1.Feeding.......................................................................................................2−28

2.2.6.2.Transfer.......................................................................................................2−28

2.2.6.3.Fusing.........................................................................................................2−29

2.2.6.4.LSU............................................................................................................2−29

2.2.7.SoftwareDescriptions..................................................................................................2−30

2.2.7.1.Softwaresystemoverview..............................................................................2−30

2.2.7.2.Architecture.................................................................................................2−30

2.2.7.3.DataandControlFlow...................................................................................2−31

3.DisassemblyandReassembly..............................................................................................................3−1

3.1.Precautionswhenreplacingparts................................................................................................3−1

3.1.1.Precautionswhenassemblinganddisassembling...............................................................3−1

3.1.2.PreautionswhenhandlingPBA......................................................................................3−1

3.1.3.ReleasingPlasticLatches..............................................................................................3−2

3.2.Screwsusedintheprinter..........................................................................................................3−3

3.3.ReplacingtheMainSVCparts...................................................................................................3−4

3.3.1.Cover........................................................................................................................3−4

3.3.2.Mainboard.................................................................................................................3−7

3.3.3.SMPSboard...............................................................................................................3−7

3.3.4.HVPSboard...............................................................................................................3−8

3.3.5.Bin-FullSensor...........................................................................................................3−8

3.3.6.MainDriveunit...........................................................................................................3−9

3.3.7.PickupandRegiClutch...............................................................................................3−9

3.3.8.PickupandForwardroller............................................................................................3−10

3.3.9.RetardRoller..............................................................................................................3−11

3.3.10.DuplexUnit...............................................................................................................3−12

3.3.11.TransferRoller............................................................................................................3−13

3.3.12.LSU..........................................................................................................................3−13

3.3.13.FuserUnit..................................................................................................................3−14

3.3.14.ExitSensor.................................................................................................................3−14

3.3.15.FeedandRegisensorPBA............................................................................................3−15

3.3.16.OPEPBA..................................................................................................................3−16

3.3.17.WirelessLANPBA(OnlyML-2955DW).........................................................................3−16

4.Troubleshooting................................................................................................................................4−1

4.1.AlignmentandAdjustments.......................................................................................................4−1

4.1.1.ControlPanel..............................................................................................................4−1

4.1.2.UnderstandingthestatusLED........................................................................................4−3

Contents

4.1.3.JamRemoval..............................................................................................................4−4

4.1.4.Periodicdefectiveimage...............................................................................................4−8

4.1.5.Usefulmanagementtools..............................................................................................4−9

4.1.5.1.UsingSamsungEasyPrinterManager(WindowsandMacintoshonly)....................4−9

4.1.5.2.UsingSamsungPrinterStatus(Windowsonly)...................................................4−10

4.1.5.3.UsingSmartPanel(Linuxonly).......................................................................4−12

4.1.6.UpdatingFirmware......................................................................................................4−13

4.1.6.1.UpdatethermwarebyusingtheUSBport........................................................4−13

4.1.6.2.Updatethermwarebyusingthenetwork(ML-295xND,DWonly).......................4−14

4.1.7.EDCprogram.............................................................................................................4−16

4.2.Troubleshooting......................................................................................................................4−18

4.2.1.Procedureofcheckingthesymptoms...............................................................................4−18

4.2.1.1.BasicCheckList...........................................................................................4−19

4.2.2.ErrorCodeandTroubleshooting.....................................................................................4−20

4.2.3.Imagequalityproblem..................................................................................................4−31

5.SystemDiagrams..............................................................................................................................5−1

5.1.BlockDiagram........................................................................................................................5−1

5.2.ConnectionDiagram.................................................................................................................5−2

6.SchematicDiagrams..........................................................................................................................6−1

6.1.ToolforTroubleshooting...........................................................................................................6−1

6.2.Glossary.................................................................................................................................6−2

6.3.TheSamplePatternfortheT est..................................................................................................6−8

6.4.Selectingalocation..................................................................................................................6−9

1.Precautions

1.1.Safetywarning

1)Onlytobeservicedbyafactorytrainedservicetechnician.

Highvoltagesandlasersinsidethisproductaredangerous.Thisproductshouldonlybeservicedbyafactorytrained servicetechnician.

2)UseonlySamsungreplacementparts.

Therearenouserserviceablepartsinsidetheproduct.Donotmakeanyunauthorizedchangesoradditionstothe productasthesecouldcausetheproducttomalfunctionsandcreateanelectricshocksorrehazards.

3)LaserSafetyStatement

TheprinteriscertiedintheU.S.toconformtotherequirementsofDHHS21CFR,chapter1SubchapterJfor ClassI(1)laserproducts,andelsewhereiscertiedasaClassIlaserproductconformingtotherequirementsofIEC 60825-1.ClassIlaserproductsarenotconsideredtobehazardous.Thelasersystemandprinteraredesignedso thereisneveranyhumanaccesstolaserradiationaboveaClassIlevelduringnormaloperation,usermaintenance orprescribedservicecondition.

1.Precautions

•Wavelength:800nm(788,–13/+12)

•Beamdivergence

-Paraller:12degrees(9,–2/+3)

-Perpendicular:35degrees(31,–6/+4)

•Maximumpowerofenergyoutput:15mW

WARNING

NeveroperateorservicetheproductwiththeprotectivecoverremovedfromLaser/Scannerassembly.Thereected beam,althoughinvisible,candamageyoureyes.

Whenusingthisproduct,thesebasicsafetyprecautionsshouldalwaysbefollowedtoreduceriskofre,electricshock, andpersonalinjury .

1.Precautions

1.2.Cautionforsafety

1.2.1.Toxicmaterial

Thisproductcontainstoxicmaterialsthatcouldcauseillnessifingested.

1)Pleasekeepimagingunitandtonercartridgeawayfromchildren.Thetonerpowdercontainedintheimagingunitand tonercartridgemaybeharmful,andifswallowed,youshouldcontactadoctor.

1.2.2.Electricshockandresafetyprecautions

Failuretofollowthefollowinginstructionscouldcauseelectricshockorpotentiallycauseare.

1)Useonlythecorrectvoltage,failuretodosocoulddamagetheproductandpotentiallycauseareorelectricshock.

2)Useonlythepowercablesuppliedwiththeproduct.Useofanincorrectlyspeciedcablecouldcausethecableto overheatandpotentiallycauseare.

3)Donotoverloadthepowersocket,thiscouldleadtooverheatingofthecablesinsidethewallandcouldleadtoare.

4)Donotallowwaterorotherliquidstospillintotheproduct,thiscancauseelectricshock.Donotallowpaperclips,pins orotherforeignobjectstofallintotheproduct,thesecouldcauseashortcircuitleadingtoanelectricshockorrehazard.

5)Nevertouchtheplugsoneitherendofthepowercablewithwethands,thiscancauseelectricshock.Whenservicing theproduct,removethepowerplugfromthewallsocket.

6)Usecautionwheninsertingorremovingthepowercord.Whenremovingthepowercord,gripitrmlyandpull.The powercordmustbeinsertedcompletely,otherwiseapoorcontactcouldcauseoverheatingleadingtoare.

7)Takecareofthepowercable.Donotallowittobecometwisted,bentsharplyaroundcornersorwisedamaged.Donot placeobjectsontopofthepowercable.Ifthepowercableisdamageditcouldoverheatandcauseare.Exposed cablescouldcauseanelectricshock.Replacethedamagedpowercableimmediately,donotreuseorrepairthedamaged cable.Somechemicalscanattackthecoatingonthepowercable,weakeningthecoverorexposingcablescausing reandshockrisks.

8)Ensurethatthepowersocketsandplugsarenotcrackedorbrokeninanyway.Anysuchdefectsshouldberepaired immediately.Takecarenottocutordamagethepowercableorplugswhenmovingthemachine.

9)Usecautionduringthunderorlightningstorms.Samsungrecommendsthatthismachinebedisconnectedfromthe powersourcewhensuchweatherconditionsareexpected.Donottouchthemachineorthepowercordifitisstill connectedtothewallsocketintheseweatherconditions.

10)Avoiddampordustyareas,installtheproductinacleanwellventilatedlocation.Donotpositionthemachineneara humidierorinfrontofanairconditioner.Moistureanddustbuiltupinsidethemachinecanleadtooverheatingand causeareorcausepartstorust.

11)Donotpositiontheproductindirectsunlight.Thiswillcausethetemperatureinsidetheproducttorisepossiblyleading totheproductfailingtoworkproperlyandinextremeconditionscouldleadtoare.

12)Donotinsertanymetalobjectsintothemachinethroughtheventilatorfanorotherpartofthecasing,itcouldmake contactwithahighvoltageconductorinsidethemachineandcauseanelectricshock.

13) cangetashockbytheelectricdischarge.

WhenreplacingtheSMPSboard,pleasewait5minutesafterunpluggingthepowercord,thenreplaceit.You

1.Precautions

1.2.3.Handlingprecautions

Thefollowinginstructionsareforyourownpersonalsafetytoavoidinjuryandsoasnottodamagetheproduct.

1)Ensuretheproductisinstalledonalevelsurface,capableofsupportingitsweight.Failuretodosocouldcause theproducttotiporfall.

2)Theproductcontainsmanyrollers,gearsandfans.Takegreatcaretoensurethatyoudonotcatchyourngers,hairor clothinginanyoftheserotatingdevices.

3)Donotplaceanysmallmetalobjects,containersofwater,chemicalsorotherliquidsclosetotheproductwhichifspilled couldgetintothemachineandcausedamageorashockorrehazard.

4)Donotinstallthemachineinareaswithhighdustormoisturelevels,besideonopenwindoworclosetoahumidieror heater.Damagecouldbecausedtotheproductinsuchareas.

5)Donotplacecandles,burningcigarettes,etcontheproduct,Thesecouldcauseare.

1.2.4.AssemblyandDisassemblyprecautions

1)ReplacepartscarefullyandalwaysuseSamsungparts.Takecaretonotetheexactlocationofpartsandalsocable routingbeforedismantlinganypartofthemachine.Ensureallpartsandcablesarereplacedcorrectly.Pleasecarryout thefollowingproceduresbeforedismantlingtheproductorreplacinganyparts.

2)Ensurethatpowerisdisconnectedbeforeservicingorreplacinganyelectricalparts.

3)Disconnectinterfacecablesandpowercables.

4)Onlyuseapprovedspareparts.Ensurethatpartnumber,productname,anyvoltage,currentortemperaturerating arecorrect.

5)Whenremovingorre-ttinganypartsdonotuseexcessiveforce,especiallywhenttingscrewsintoplastic.

6)Takecarenottodropanysmallpartsintothemachine.

7)HandlingoftheOPCDrum

•TheOPCDrumcanbeirreparablydamagedifitexposedtolight.TakecarenottoexposetheOPCDrumeither todirectsunlightortouorescentorincandescentroomlighting.Exposureforaslittleas5minutescandamage thesurfaceofthephotoconductivepropertiesandwillresultinprintqualitydegradation.Takeextracarewhen servicingtheproduct.RemovetheOPCDrumandstoreitinablackbagorotherlightproofcontainer.Take carewhenworkingwiththeCovers(especiallythetopcover)openaslightisadmittedtotheOPCareaandcan damagetheOPCDrum.

•TakecarenottoscratchthegreensurfaceofOPCDrumUnit.IfthegreensurfaceoftheDrumCartridgeis scratchedortouchedtheprintqualitywillbecompromised.

1.Precautions

1.2.5.Disregardingthiswarningmaycausebodilyinjury

1)Becarefulwiththehightemperaturepart.

Thefuserunitworksatahightemperature.Usecautionwhenworkingontheprinter.Waitforthefuserunitto cooldownbeforedisassembly.

2)Donotputngerorhairintotherotatingparts.

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.Precautions

1.3.ESDprecautions

Certainsemiconductordevicescanbeeasilydamagedbystaticelectricity.Suchcomponentsarecommonlycalled “ElectrostaticallySensitive(ES)Devices”orESDs.ExamplesoftypicalESDsare:integratedcircuits,someeldeffect 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.Somesolderremovaldevicesnotclassiedas“anti-static”can generateelectricalchargessufcienttodamageESDs.

5)DonotuseFreon-propelledchemicals.Whensprayed,thesecangenerateelectricalchargessufcienttodamageESDs.

6)DonotremoveareplacementESDfromitsprotectivepackaginguntilimmediatelybeforeinstallingit.Most replacementESDsarepackagedwithallleadsshortedtogetherbyconductivefoam,aluminumfoil,oracomparable conductivematerial.

7)ImmediatelybeforeremovingtheprotectiveshortingmaterialfromtheleadsofareplacementESD,touchtheprotective materialtothechassisorcircuitassemblyintowhichthedevicewillbeinstalled.

8)MaintaincontinuouselectricalcontactbetweentheESDandtheassemblyintowhichitwillbeinstalled,until completelypluggedorsolderedintothecircuit.

9)MinimizebodilymotionswhenhandlingunpackagedreplacementESDs.Normalmotions,suchasthebrushingtogether ofclothingfabricandliftingone’sfootfromacarpetedoor,cangeneratestaticelectricitysufcienttodamageanESD.

2.ProductSpecicationsandDescription

2.1.ProductSpecications

2.1.1.ProductOverview

1)Speed

•Upto28ppminA4(29ppminLetter)

2)PrintingResolution

•Upto1,200x600dpieffectiveoutput

3)Processor

•533MHz

4)PrinterLanguageEmulation

•PCL6/5e,SPL

5)Memory

•64MB

6)Interface

•HighspeedUSB2.0

7)ControlPanel

•NoLCD,4keysandLEDs(4LEDs:D,NDmodel/5LEDs :DWmodel)

8)Tonercartridge

•Initial:1K

•Sales:1.5K/2.5Ktwotypes

2.1.2.Specications

•ProductSpecicationsaresubjecttochangewithoutnotice.

2.1.2.1.GeneralPrintEngine

ItemSpecication

2.ProductSpecicationsandDescription

EngineSpeed

WarmuptimeFromSleepLessthan15seconds

FPOT

ResolutionUpto1,200x600dpieffectiveoutput

SimplexUpto28ppminA4(29ppminLetter)

DuplexUpto13ppminA4(13ppminLetter)

FromReadyLessthan8.5seconds

FromSleepLessthan15seconds

2.1.2.2.ControllerandSoftware

ItemSpecication

Processor533MHz

Memory

PrinterLanguagesPCL6/5e,SPL

FontsWindowsFonts

Std.64MB

Max.64MB

DefaultDriver

•Windows/Mac/Linux:SPL

•Unix:PLC6

•Windows:SPL,PCL6

Install

Driver

SupportingOS

•Mac/Linux:SPL

•Unix:PCL6

Windows2000/XP(32/64bits)/Vista(32/64bits)/2003 Server(32/64bits)/2008Server(32/64bits)/7(32/64bits)/2008 ServerR2(64bits)

Linux

•RedHatEnterpriseLinuxWS4,5(32/64bit)

•Fedora5,6,7,8,9,10,11,12,13(32/64bit)

•SuSELinux10.1(32bit)

•OpenSuSE10.2,10.3,11.0,11.1,11.2(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(32/64bit)

•SuSELinuxEnterpriseDesktop10,11(32/64bit)

•Debian4.0,5.0(32/64bit)

MacOS10.4~10.6

2.ProductSpecicationsandDescription

ItemSpecication

WHQL

Compatibility

Protocol

UNIX

•SunSolaris9,10(x86,SP ARC)

•HP-UX11.0,11iv1,11iv2,11iv3(P A-RISC,Itanium)

•IBMAIX5.1,5.2,5.3,5.4

Windows2000/XP(32/64bits)/Vista(32/64bits)/2003 Server(32/64bits)/2008Server(32/64bits)/7(32/64bits)/2008 ServerR2(64bits)

Win2000/XP(32/64bits)/2003Server(32/64bits)/ Vista(32/64bits)/2008Server(32/64bits)/7(32/64bits)/2008 ServerR2(64bits)

•[TCP/IP]

TCP/IPv4/IPv6,HTTP ,SNMPv1/v2c/v3, IPSec,DNS/WINS,DDNS,DHCP ,BOOTP , AutoIP,StandardTCP/IPprinting,LPR, IPP,UPnP(SSDP),Bonjour,Telnet,WSD,SLP,SetIP

•[Others]

IPSec

WiredNetwork

(295xND,DWonly)

WirelessNetwork

(295xDWonly)

Application

[Windows]

•Windows2000/XP(32/64bits)/Vista(32/64bits)/

2003Server(32/64bits)/2008Server(32/64bits)/ 7(32/64bits)/2008ServerR2(64bits)

[Mac]

•MacOS10.4~10.6

[Linux]

SupportingOS

•RedHatEnterpriseLinuxWS4,5(32/64bit)

•Fedora5,6,7,8,9,10,11,12,13(32/64bit)

•SuSELinux10.1(32bit)

•OpenSuSE10.2,10.3,11.0,11.1,11.2(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(32/64bit)

•SuSELinuxEnterpriseDesktop10,11(32/64bit)

•Debian4.0,5.0(32/64bit)

Protocol802.11b/g/n

SupportingOSSameaswirednetwork

SamsungEasyPrinter Manager

SmartPanel

NetworkManagement

ForWindowsandMacintosh

ForLinux

SyncThruW ebService2.0

Interface

ParallelN/A

USBHighspeedUSB2.0

2.1.2.3.PaperHandling

2.ProductSpecicationsandDescription

ItemSpecication

StandardCapacity250-sheetCassette@80g/m²,1-sheetMultiPurposeTray

Max.Capacity251-sheet

Printing

Standard

CassetteTray

Multi-purpose

tray

OptionalCassetteTrayN/A

OutputStackingCapacity

Max.Size216x356mm(8.5"x14")

Min.Size76x127mm(3.0"x5.0")

Capacity250-sheetCassette@80g/

MediasizesA4,A5,ISOB5,JISB5,Executive,Letter,Ocio,Folio,Legal

MediatypesPlain,Thin,Recycled,Thick,Archive

Mediaweight16~43lb(60to163g/m²)

SensingYes

Capacity

Mediasizes

Mediatype

Mediaweight16~58lb(60to220g/m²)

SensingYes

•PlainPaper:1sheet

•Envelop:1sheet

A4,A5,A6,EXEC,ISOB5,JISB5,Letter,Ocio,Folio,Legal,Envelope(No10, Monarch,DL,C5,C6)Postcard4x6,Custom

Plain,Thick,Thin,Cotton,Colored,Pre-printed,Recycled,Envelope,Transparency, Label,Cardstock,Bond,Archive

•Face-Down:150sheets@80g/m²

•Face-Up:1sheet

OutputFullsensingYes

SupportingYes(Built-in)

Duplex

PrintableArea

MediasizesA4,Letter,Ocio,Folio,Legal

MediatypesPlain,thin,thick,bond,recycled

Mediaweight16~32lb(60to120g/m²)

Non-Printable

•Envelop:10mm(0.4")fromedge(Top,Bottom,Left,Right)

Area

•OtherMedia:4mm(0.16")fromedge(T op,Bottom,Left,Right)

2.ProductSpecicationsandDescription

2.1.2.4.Consumables

TypeAverageyieldPartname

StandardyieldtonercartridgeApprox.1,500pages•MLT -D103S

HighyieldtonercartridgeApprox.2,500pages•MLT-D103L

NOTE

•DeclaredyieldvalueinaccordancewithISO/IEC19752.

•Dependingontheoptionsandjobmodeused,thetonercartridge’ slifespanmaydiffer.

2.1.2.5.ReliabilityandService

ItemSpecication

PrintingV olume(SETAMPV)175pages

12,000pages

Max.MonthlyDuty

MPBF30,000pages

MTTR30min.

SETLifeCycle100,000pagesor5years(whichevercomesrst)

2.1.2.6.Environment

ItemSpecication

OperatingEnvironment

AcousticNoiseLevel(Sound Power/Pressure)

PowerConsumption

Dimension(WxDxH)SET348x338x197mm(13.7x13.3x7.7inches)

Temperature10Cto32C

Humidity20%to80%

PrintingLessthan50dB

StandbyLessthan30dB

SleepBackGroundLevel

ReadyLessthan60W

A VG.Lessthan360W

Max/PeakLessthan400W

Sleep/PowerOffLessthan6.5W/Lessthan0.8W(ConformitytoEPA)

WeightSET(WithTonercartridge)7.2kg(15.87lbs)

2.ProductSpecicationsandDescription

2.1.2.7.Options

ItemSpecication

MemoryN/A

SecondCassetteN/A

HardDiskN/A

2.1.2.8.Maintenanceparts

ItemImagePartCodeLife

•220V

Fuser

•JC91–01034B

•110V

•JC91–01034A

100,000pages

TransferRollerJC66-01218A100,000pages

Pick-Up/Forward RollerAssy

RetardRollerJC90–01107A50,000pages

JC93–00405A50,000pages

2.ProductSpecicationsandDescription

2.1.3.ModelComparisonTable

SamsungML-295xNDSamsungML-2525HPP1606dn

Image

Speed(A4)28ppm24ppm25ppm

FPOT

(fromready)

Processor533MHz150MHz400MHz

Memory64MB8MB32MB

EmulationGDI,PCL6GDIGDI,PCL5e

Input250CST,1MP250CST,1MP250Bin,10MP

Duplex(Auto)YesNoNo

Noise50dBA50dBA53dBA

TonerCartridge1.5/2.5K(1K)1.5/2.5K(1K)2.1K(1K)

lessthan8.5seclessthan9seclessthan7sec

2.ProductSpecicationsandDescription

00000

2.2.SystemOverview

Thischapterdescribesthefunctionsandoperatingprincipalofthemaincomponent.

2.2.1.FrontView

NOTE

•Thisillustrationmaydifferfromyourmachinedependingonitsmodel.

•Somefeaturesandoptionalgoodsmaynotbeavailabledependingonmodelorcountry.

1OutputTray5Tray1

2Controlpanel6Manualfeeder

3Frontcover7Paperwidthguidesonamanualfeeder

4Paperlevelindicator8Outputsupport

2.ProductSpecicationsandDescription

2.2.2.RearView

NOTE

•Thisillustrationmaydifferfromyourmachinedependingonitsmodel.

•Somefeaturesandoptionalgoodsmaynotbeavailabledependingonmodelorcountry.

1Networkport*4Powerreceptacle

2USBport5Rearcover

3Power-switch

*Networkandwirelessmodelsonly

2.2.3.PaperPath

S imple x Du plex MP

Thefollowingdiagramdisplaysthepaththepaperfollowsduringtheprintingprocess.

2.ProductSpecicationsandDescription

[1]

[2]

[3]

[4]

[5]

[6]

[9]

[11]

[12]

[14]

[13]

[7]

[8][10]

2.2.4.SystemLayout

ThismodelconsistsoftheEngineparts,HardwareandFirmware.Theenginepartsconsistsofthemechanicalparts comprisingFrame,Duplex,Tonercartridge,Driveunit,Transferroller,Fuser,Cassette.TheHardwarepartconsistsofthe maincontrolboard,powerboard,operationpanel,PCInterface.

1LSU

2TonerCartridge

3Regi.Roller

4MP

5FeedRoller

6ForwardRoller

7RetardRoller

8Pick-upRoller

9Cassette

10TransferRoller

11DuplexUnit

12FuserUnit

13ExitRoller1

14ExitRoller2

2.ProductSpecicationsandDescription

A : Fo rwa rd roller

B : Retard rolle r C : Pick u p roller

2.2.4.1.FeedingPart

Itconsistsofacassette,anMPtrayforsupplyingdifferenttypesofmedia(envelope,label,specialpaper)andparts relatedtopaperfeedinitialization.

1)Cassette

Thecassettestoresthepaper(Capacity:250sheets(80g/m²paperstandard).Boththesideguideandtherearguidecanbe adjustedforvarioustypesofpapersfromA6tolegalsizepaper.Ithasapaperdetectingfunction,paperarrangingfunction, andadjustablepaperguidestomakeitatrulyuniversalcassette.

2)Pick-Up/Forward/Retardroller

Whenpickuptakesplace,thepickuprollermovesdowntocomeintocontactwiththesurfaceofthepaper.Thepickuproller movesdownwhenthepickupclutchisactivated.Theforwardrollerandtheretardrollerservetomakesurethatasinglesheet ofpaperismovedintothepaperpath,andthepaperismovedasfarastheregistrationrollerbythemeansofthefeedroller.

3)Registrationroller

Itisusedasanantiskewdevice,andtosetupproperregistrationtimingwiththatofthetonedimageonthedrum.Italsois usedforjamdetectiontoensurepaperhasleftthepapertray.

4)MP(Multi-Purpose)Tray

Themulti-purposetraycanholdspecialsizesandtypesofprintmaterial,suchaspostcards,notecards,andenvelopes.

2.ProductSpecicationsandDescription

0000

000

0000

000

2.2.4.2.TransferRoller

ThetransferrollerdeliversthetoneroftheOPCdrumtothepaper.

•LifeSpan:Printover100,000sheets(in15~30℃)

2.2.4.3.DriveUnit

Inthismodel,thedrivingdeviceconsistsofBLDCmotor,Regi./Pickupclutches,variousgearsforOPC,Fuser,Pickup,Feed,Regi,Exit;arealldrivenfromthisdriveblock.

2.ProductSpecicationsandDescription

2.2.4.4.Fuser

ThisunitconsistsofHeatRoller,aThermostat,andThermistor,etc.Itfusesthetonerthatwastransferredbythetransfer rollerontothepaper,byapplyingheatandpressuretocompletefusingprocess.

1)Thermostat

Whenaheatlampisoverheated,aThermostatcutsoffthemainpowertopreventover-heating.

•ThermostatType:Non-ContacttypeThermostat

•ControlTemperature:170℃±5℃

2)Thermistor

Itisatemperaturedetectingsensor.

•TemperatureResistance:7K(180℃)

3)Heatroller

Theheatrollertransferstheheatfromthelamptoapplyaheatonthepaper.

ThesurfaceofaheatrolleriscoatedwithTeon,sotonerdoesnotsticktothesurface.

4)Pressureroller

Apressurerollermountedunderaheatrollerismadeofasiliconresin,andthesurfacealsoiscoatedwithTeon.Whena paperpassesbetweenaheatrollerandapressureroller,toneradherestothesurfaceofapaperandispermanentlyfused.

5)HalogenLamp

•V oltage:120V(115±5%)/220V:230±5%

•Capacity:850Watt±25W

6)Itemsforsafety

Protectingdeviceforoverheating

•1stprotectiondevice:Hardwarecutsoffwhenoverheated

•2ndprotectiondevice:Softwarecutsoffwhenoverheated

•3rdprotectiondevice:Thermostatcutsoffmainpower.

Safetydevice

•Afuserpoweriscutoffwhenafrontcoverisopened

•Maintainatemperatureoffusercover’ssurfaceunder80℃foruser,andattachacautionlabelatwherecustomer

canseeeasilywhencustomeropenarearcover.

2.ProductSpecicationsandDescription

2.2.4.5.LSU(LaserScannerUnit)

ItisthecorepartoftheLBPwhichswitchesfromthevideodatareceivedtothecontrollertotheelectrostaticlatentimage ontheOPCdrumbycontrollinglaserbeam,exposingOPCdrum,andturningprincipleofpolygonmirror.TheOPCdrumis turnedwiththepaperfeedingspeed.TheHSYNCsignaliscreatedwhenthelaserbeamfromLSUreachestheendofthe polygonmirror,andthesignalissenttothecontroller .ThecontrollerdetectstheHSYNCsignaltoadjusttheverticallineof theimageonpaper.Inotherwords,aftertheHSYNCsignalisdetected,theimagedataissenttotheLSUtoadjusttheleft marginonpaper.Theonesideofthepolygonmirrorisonelineforscanning.

2.ProductSpecicationsandDescription

2.2.4.6.TonerCartridge

Byusingtheelectronicphotoprocess,itcreatesavisualimage.Inthetonercartridge,theOPCunitandthedeveloping unitareinabody .TheOPCunithasOPCdrumandchargingroller,andthedevelopingunithastoner,supplyroller, developingroller,andblade.

•DevelopingMethod:Nonmagnetic1elementcontactingmethod

•Toner:Nonmagnetic1elementshattertypetoner

•Thelifespanoftoner(ISO19752pattern/A4standard)

-Initialtoner:1K

-Salestoner:1.5K/2.5K

•OPCCleaning:Collectthetonerbyusingcleaningblade

•Handlingofwastedtoner:Collectthewastedtonerinthecleaningframebyusingcleaningblade

•Classifyingdevicefortonercartridge:IDisclassiedbyCRUM.

1OPCDrum5SupplyRoller

2ChargingRoller6WasteTonerTank

3Agitator7CleaningBlade

4DevelopingRoller

2.ProductSpecicationsandDescription

DDDDRR2

1166bbiitt((OOnn!!ddiiee)

)

66 44 MM BB

KKiinnggbbiirrdd!!SSMMPPSS((NNEEWW)

)

PPOOWWEER

CCOORRD

EEEEPPRROOM

MMLL--22995555NNDD//DDW

::3322KKB

SSeerriiaall!!NNoor

::!!88MMB

DDCC--DDCC!!CCoonnvveerrtteer

SS NN 11 00 00 11 00 44 33 !!::!! 11 ..22 VV // 11 ..88 VV // 33 ..33 VV

MMIIII!

((AACC220011AA11)

)

EEnnggiinne

SS PP II

DDDDRR!

CCoonnttrrool

II22C

MMAACCUUAARRT

CC33--NNeexxt

VV IIDD EE OO !!CC OO NN TT RR OO LL

PPWWMMCCLLOOCCKKUUSSBB!!22..0

DDEEVVEE!!KK!!UUNNIIT

CCRRUUM

HHVVPPSS!!::!!EEPP!!&&!!TTHHVV!!HHiigghh!!VVoollttaaggee!!oouuttppuut

CCoovveerr!!ooppeenn!!ddeetteecct

BB iinn ff uu llll// RR ee gg ii// ff ee ee dd // PP __ ee mm pp tt yy ss ee nn ss oo rr

CCrruumm!!IIFF!!//!!PPiicckkuupp!!&&!!rreeggiicclluuttcch

LLSSU

VV iidd ee oo

IIF

AABBCC!!CChhiip

((SSWW33330044BB)

)

II22C

FFaann!!((11)

)

--..!!MMAAIINN,

--..!!MMaaiinn!!::!!!!PP__EExxiittSSeennssoor

FFDDCC66442

22 44 VV SS

T RR((xx22))

SSyysstteemm!!BBooaarrd

WWLLAANN!!IIF

WW--mmooddeell!!oonnlly

FFUUSSEERR!!UUNNIIT

CCoonnttaacct

TT hh ee rrmm ii ss ttoo rr

885500WW!!llaammppTThheerrmmoossttaat

MM oo tt oo rr !!IICC -- LL ee ss ss !!(( 22 ))

..BBLLDDCC!!MMAAIINN!!((11)

)

..LLSSUU!!PP--MMoottoorr!!((11)

)

55V

CCRRUUMM!!IIF

SSDDIIO

FFEETT((xx22)

)

55 VV __ SS MM PP SS

MMiiccrrooSS//W

((hhvvppss)

)

UUI

BBaattiiaann::!!22LLiinneeLLCCDD!!OOPPE

LL SS UU !!VV iidd ee oo

--..!!DDuuaall!!bbeeaam

UUSSBB22..00!!DDeevviicce

EEmmbbeeddddeedd!!UUSSB

GG PP II OO !!oo rr !!UU AA RR TT

2.2.5.Hardwareconguration

TheML-295xseriesElectricalCircuitSystemconsistsofthefollowing:

•Mainboard(Systemboard)

•OPEboard

•SMPSboard

•HVPSboard

DiagramoftheML-295xseriesElectricalCircuit

ML-295xserieshasasystemboardofintegratedenginecontrollerandvideocontroller.

Theenginecontrollercontrolsallmodulesrequiredtoprint,thatis,LSU,HVPS,SMPS,FAN,Fuser,etc.

ItcommunicateswiththevideocontrolblockinsideCPUforprinting.Andithastheinterfaceforallvideosyncsignal toprintoutthevideodata.

ThevideocontrollerreceivesprintdatafromthehostthroughnetworkorUSBPort.Ittakesthisinformationandgenerates printablevideobitmapdata.

Themainboardadoptsthe533MHzCPU,onboardDDR2memory(128MB)toperformprintingjobssuccessfully .

2.ProductSpecicationsandDescription

Main Pro c e s s o r

Ch o rus 3-Next

533MHz

DD R2

64MB (64Mx16b it)

US B_DP /DM.

S P I #1

8MB

S e rial Nor

S P I #2

WLAN

P BA

100 Bas ed TX

OP E P BA

GP IO

EEP ROM

(32KB)

I2C

2.2.5.1.Mainboard

Chorus3–Next(C3N)chipisadoptedasthemainprocessor.Itsprocessspeedis533MHz.Itisintegratedenginecontroller andvideocontroller.

DDR264MBisadoptedforhighspeeddataprocessing.Boothas8MBSPI.

USBistheembeddedtypeandwirednetworksupports100Mfullduplex.

[Mainboarddiagram]

2.ProductSpecicationsandDescription

7 8

[Mainboardimage]

•Connection

1LSUVideoconnector

2LSUMotorconnector

3HVPSinterfaceconnector

4OPEconnector

5SMPSinterfaceconnector

6MainBLDCMotorconnector

7PaperExitsensorconnector

8Fuserthermistorinterfaceconnector

9Wirednetworkconnector

10USBdeviceconnector

11Wirelessmoduleinterfaceconnector(Wireless

modelonly)

•Information

-PartCode:JC92–02401A(ML-295xND)/JC92–02411A(ML-2955DW)

-PBAname:PBA-MAIN

2.ProductSpecicationsandDescription

2.2.5.2.OPEboard

TheOPEControlleriscomposedofanStatusLED,ModeLED,PowerLED,WPSLED(ML-2955DWmodelonly).OPE communicateswithmaincontrollerviaGPIO.ThepowerLEDiscontrolledbythemainboard.

[OPEboarddiagram]

[OPEboardimage]

•Information

-PartCode:JC92–02405A

-PBAname:PBAOPE

•Connection

1MAINPBAI/FFFCCable(JC39-01531A)

2.ProductSpecicationsandDescription

2.2.5.3.WirelessLANboard(ML-2955DWonly)

TheWirelessLANModulesupports802.11b/g/n.ItcommunicateswithmainboardviaSPI.

[WLANboardimage]

•Information

-PartCode:JC92–02402A

-PBAname:PBA-WNPC

•Connection

1INTERFACECONNECTORTOMAINBOARD

(JC39-01565A,FFCCABLE-WLAN)

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