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Service Manual for OF5800
Chapter 2 Machine Operations
The toner image transferred to the paper is securely fixed by a heat roller fusing system. The toner image
is fused by Upper Fusing Roller heated by the Heater Lamp, and securely fixed by the pressure between
the Upper and Lower Fusing Rollers.
A Thermistor (TH1) detects and controls the Upper Fusing Roller temperature.
The Thermal Fuse (TF1) opens when the temperature becomes approx. 133°C and shuts down the power
to the Heater Lamp.
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