Fusing Unit; Structure - Brother HL-3450CN Service Manual

CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS
1.7

Fusing Unit

The fusing unit employs a thermal fusing system using heater lamps in the rollers. Paper
carrying the combined toner image passes between the heat rollers. Heat and pressure is
applied to the paper when passing between the heat rollers so that the toner image is melted
and fused onto the paper.
1.7.1

Structure

The fusing unit consists of the following component parts; (Refer to Fig.4-26.)
c
Fuser roller:
d
Back-up roller:
e
Fusing heaters:
f
Thermistor:
g
Thermal fuse:
h
Oil bottle:
i
Fuser cleaner:
2
5
incorporates a heater lamp.
is a pressure roller and incorporates a heater
lamp.
halogen lamps to heat the rollers.
is a sensor to detect the temperature of the
fuser roller's surface.
prevent the fuser roller from being
excessively heated up.
contains silicone oil for fusing.
cleans the fuser roller.
4
7
3
Fig. 4-26
4-26
1
6