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Contents

2.2.7.FuserUnit..................................................................................................................2−27

2.2.7.1.FuserUnitOverview......................................................................................2−27

2.2.7.2.FuserUnitMainComponents..........................................................................2−28

2.2.7.3.FuserDrive..................................................................................................2−28

2.2.7.4.TemperatureContorl......................................................................................2−29

2.2.8.LaserScanningUnit.....................................................................................................2−30

2.2.8.1.LaserScanningUnitOverview........................................................................2−30

2.2.8.2.LaserScanningOpticalPath............................................................................2−31

2.2.9.DriveSystem..............................................................................................................2−32

2.2.9.1.DriveMotors................................................................................................2−32

2.2.9.2.MainDriveUnit(OPC,DEVE,Toner,Fuser,Regi.).............................................2−34

2.2.9.3.ExitDriveUnit.............................................................................................2−35

2.2.9.4.TrayLiftingDriveUnit..................................................................................2−36

2.2.10.HardwareConguration................................................................................................2−37

2.2.10.1.MainController............................................................................................2−41

2.2.10.2.OPEController.............................................................................................2−45

2.2.10.3.SMPSandFDBBoard...................................................................................2−48

2.2.10.4.HVPSBoard................................................................................................2−51

2.2.10.5.EraserPBA..................................................................................................2−52

2.2.10.6.Cover-OpenPBA..........................................................................................2−52

2.2.10.7.JointPBA....................................................................................................2−53

2.2.10.8.DeveCrumJointPBA....................................................................................2−53

2.2.10.9.TonerCrumJointPBA...................................................................................2−54

2.2.10.10.TonerCrumPBA..........................................................................................2−54

2.2.10.11.DeveCrumPBA...........................................................................................2−54

2.2.11.Finisher.....................................................................................................................2−55

2.2.11.1.FinisherSystemConguration.........................................................................2−55

2.2.11.2.LayoutandPaperpath....................................................................................2−56

2.2.11.3.Electricalpartslocation..................................................................................2−57

2.2.11.4.Finishermainboard.......................................................................................2−58

2.2.12.Mailbox....................................................................................................................2−59

2.2.12.1.Mailboxlayout.............................................................................................2−59

2.2.12.2.Electricalpartslocation..................................................................................2−60

2.2.12.3.Mailboxmainboard......................................................................................2−61

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

Samsung ML-451 Series User Manual

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