Fusing Process - Epson EPL-N2000 Service Manual

Operating Principles EPL-N2000 Service Manual

2.1.1.5 Fusing Process

The fusing unit permanently fixes the toner image, transferred from the PC drum, onto the paper.
The fusing system this printer uses is the heat roller fusing system. The toner on the paper is
melted by the upper fusing roller, which is heated by the heater lamp, then the toner is fixed by
pressure from the paper traveling through the upper and lower fusing rollers.
There is a thermostat and thermistor installed on the upper fusing roller.The thermistor detects the
surface temperature of the upper fusing roller. The PWB-A board switches the heater lamp on or
off, depending on the temperature detected. When the temperature is abnormally high, which is
usually caused by a malfunction of the control board or the thermistor, the thermostat detects it
and cuts off the current.
o
During warm up, the heater continues to heat up until it reaches 190 C (374 F). At printing, the
o
heater is controlled to remain 180 C (356 F).
Figure 2-6. Fusing Process
2-6 Rev.A