Samsung CLP-510/XBH, Руководство по обслуживанию

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5-8
System Outline
Samsung Electronics
Service Manual
5.1.5 Fuser (Fusing Section)
Toner that has been through the primary and
secondary image transfer processes is fixed,
semi-permanently, to the paper.
The fuser unit consists of heat lamps (2 ea), heat
rollers (2 ea), thermistor, and thermostats (2 ea). It
melts the toner onto the paper using pressure and
high temperature to complete the printing process.
1) Thermostat (2pieces)
If the heat lamps or heat rollers overheat the
thermostat turns off power to the lamps in the
fuser unit to prevent fire. It is a temperature
cut-off device.
2) Thermistor
The thermistor detects the temperature of the heat roller's surface, and feedbacks the information
to the main processor which uses this information to control power to the fuser lamps in order to
maintain the heat roller at a steady temperature.
3) Heat Roller (2pieces)
Halogen lamps are used to heat the heat rollers. The heat rollers have a special Teflon surface
which ensures that any melted toner which comes into contact with the heat roller surface does not
stick. Paper passes between the two rollers which evenly heat the paper from both sides to melt
the toner and semi-permanently fix it to the paper.
4) Safety Information
> Overheat protection
* 1st level protection: Print engine is stopped if overheat is detected
* 2nd level protection: Software turns off lamp power if overheat is detected.
* 3rd level protection: Thermostat turns off lamp power if overheat is detected.
> Protecting device
* Fuser unit power is turned off when
the duplex cover or the toner
cartridge door is open.
* This machine keeps the surface
temperature of the fuser unit cover
under 180°C, and it has a caution
label attached inside the exit cover
where it can be easily seen by the user.
Heat Roller
Heat Roller
Heat Lamp
(500W)
Heat Lamp
(300W)
Paper
Spring