Samsung ProXpress M453x series - Fuser Unit Temperature Management

2.ProductSpecicationsandDescription
2.6.3.Fuserunittemperaturecontrol
Whenthemainswitchturnson,theCPUturnsonthefusinglamp.ThelampstaysonuntiltheNCsensorsdetectthestandby
temperature.ThentheCPUraisesthetemperatureuptotheprintingtemperature.
■OverheatProtection
TheCPUcutspowertothefusinglampinthefollowingcases:
•TheFuserBelttemperatureisdetectedbytheNCsensor,andifitdetectsanoverheatconditionitwillshutdown
ACpowertotheFuser.
•TheheatingtemperatureisdetectedbyathermistorandifresistanceissolowthattheMainBoarddetectsanoverheat
condition;itwilldisabletheControlCircuitfortheFuserontheMainBoard.
Thefollowingcomponentsareusedwhenthermistoroverheatprotectionfails:
•TwothermostatsforthefuserbeltareontheneutralsideoftheAClineofthefusinglamp.
•Ifeitheroneofthethermostatsdetecttemperaturesthatbecomehigherthan190°C,itopensandcutsACpowerto
bothfusinglamp.
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