Samsung ML-451 Series - 2.2.7.4. Temperature Control

2.ProductSpecicationsandDescription
2.2.7.4.TemperatureContorl
Whenthemainswitchturnson,theCPUturnsonthefusinglamp.ThelampstaysonuntiltheNCsensorsdetectthestandby
temperature.ThentheCPUraisesthetemperatureuptotheprintingtemperature.
Lamp 1(700W) : Ce n ter he a ting
Lamp 2(600W) : S ide h e a tin g
NC S e n s or1
The rmos ta t 1
The rmos ta t 2
The rmistor1
OverheatProtection
TheCPUcutspowertothefusinglampinthefollowingcases:
•ThefuserbelttemperaturedetectedbytheNCsensorbecomeshigherthanthestandardforoverheat.
•Theheatingtemperaturedetectedbythethermistorbecomeshigherthanthestandardforoverheat.
Thefollowingcomponentsaredestroyedwhenthermistoroverheatprotectionfails:
•Twothermostatsforthefuserbeltgetintolinewiththecommongroundlineofthefusinglamp.
•Ifoneofthethermostattemperaturesbecomeshigherthan190°C,itopensandcutspowertothefusinglamp.Ifthe
otherthermostattemperaturebecomeshigherthan190°C,italsoopensandcutspowertothefusinglamp.
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