Fuser Unit; Fuser Unit Overview - Samsung ProXpress M453x series Service Manual

2. Product Specifications and Description

2.6. Fuser unit

This section describes the fuser unit structure and the image fusing process.

2.6.1. Fuser unit overview

This model uses two Heater Lamps which provides for a much faster warm-up time than that of a conventional fusing
system, therefore it fits in the category of an instant fusing system.
1) Drum-fuser belt
The Fuser Belt is made of 3 thin layers that can be heated by the halogen lamp inside more quickly. The drum-fuser
belt contains 2 fusing lamps. One lamp, center heating lamp, heats the center and the other lamp, side heating lamp,
heats the ends in the axial direction.
2) Pressure Roller
The pressure roller is made of soft silicone rubber, which flatten slightly creates the fusing nip.
3) NC sensor
NC sensors (non-contact type thermistors) are located in the front area and the side area of the drum-fuser belt and
controls the temperature. They protects the fusing system from overheating.
4) Thermostat
Thermostats cut off the power supply to the halogen lamp by opening the circuit when the fuser belt becomes abnormally
hot as a result of problems such as NC sensor malfunction. These thermostats are used to prevent abnormal operation.
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