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2.ProductSpecicationsandDescription

2.2.7.2.FuserUnitMainComponents

TheFuserunitincludesthefollowingcomponents:

1)Centerheaterlamp(LAMP1)/Sideheaterlamp(LAMP2)

Thesehalogenlampsheatthedrum-fuserbelt.Thecenterheaterlamp(LAMP1)andthesideheaterlamp(LAMP2)are

litalternatelytoheatthedrum-fuserbelt.Eachheaterlamphasitscoilinadifferentlocation.Thecoilofthecenter

heaterlamp(LAMP1)isinthecenter,thoseofthesideheaterlamp(LAMP2)areonbothsides.Theheaterlamps

arexedinsideofthedrum-fuserbeltsothattheywillnotrotateseparately.

2)Drum-fuserbelt

Thedrum-fusebeltconductsheatgeneratedbytheheaterlamptothetonerandpaper.Thethinfuserbeltreduces

warminguptimeandmodechangingtime.Topreventthefuserbeltfromadheringtothetoner,thesurfaceofthefuser

beltisuorinated.TheRigidassemblycontactswiththenipinsidefuser-belt.Tochecktheproperwidthbetweenthe

fuserbeltandthepressureroller,itispressedonpressurerollerbythespring.

3)Pressureroller

Thepressurerollerisarubberrollerwhichensurespropernipwidthbetweenthepressurerollerandfuserbelt.Itis

controlledbytheexternaldrivemechanism.

4)NCsensor

NCsensordetectsthesurfacetemperatureofthecenterandcontrolstheheaterlamps.

5)Thermostat

Thesethermostatscutoffthepowersupplytotheheaterlampsbyopeningthecircuitwhenthefuserbeltbecomes

abnormallyhotasaresultofproblemssuchasaNCsensormalfunction.Thesethermostatsareusedtopreventabnormal

operation.Whenthethermostatistriggered,itmustbereplaced

2.2.7.3.FuserDrive

TheDriveMotor[A]drivesthePressureroller[B]throughthegeartrain.Thefuserbelt[C]isdrivenbypressurewith

thepressureroller.

rive Motor [A]

Pr ess ure Roller [B]

Fuse r Belt [C]

Samsung ML-501 Series User Manual

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