Functions - Toshiba e-STUDIO281c Service Manual

16.3 Functions

1) IH coil (IH-COIL) (IH: Induction Heating)
The IH coil (IH-COIL) is inside the fuser roller and applies the induction heating to the fuser roller.
This IH coil (IH-COIL) is divided into two parts; the main IH coil heating the center of the fuser roller
and the sub IH coil heating both ends of the fuser roller. Each part turns ON/OFF individually control-
ling the balance of electric supply so that the fuser roller can be kept at a certain temperature without
wasting electric power on any paper size.
2) Fuser roller
The fuser roller is a metal roller which generates heat spontaneously with eddy current produced by
the electromagnetic induction of IH coil (IH-COIL). The fuser belt is heated by this self-heating of this
roller, and then the toner is fused on the paper.
3) Pressure roller
The pressure roller is a sponge roller which assures the nip amount between the fuser roller and
fuser belt. The pressure arm and spring press the fuser roller and fuser belt.
The toner is fused effectively by the pressure of this roller. This roller is driven by the transmitted
drive from the transport motor (M9).
4) Fuser belt
The fuser belt is hanged up between the fuser roller and separation roller and fuses the toner image
on the paper transported by being heated.
The thin fuser belt enables to reduce warming up time and mode changing time. To prevent the
fuser belt from adhering toner, the surface of the fuser belt is fluorinated.
5) Separation roller
The separation roller is an extra small sponge roller coated with the fluororesin tube. When the fuser
belt is tensed and driven by the separation roller, the fuser roller drives the fuser belt and the paper
between the fuser belt and pressure roller is separated from the fuser belt (belt separation method).
6) Separation fingers
One separation finger is installed above the pressure roller to separate the paper stuck on the pres-
sure roller.
7) Separation plate
The separation plate is installed above the separation roller to cover the insufficient separation often
occurs at color printing - the mode that the toner is much adhered.
8) Cleaning roller / Oil roller
Silicone oil is contained inside of the oil roller to supply a proper amount of oil to the fuser belt, and
this enables to remove the residual toner and paper dust (preventing offsetting phenomenon). Also,
the cleaning roller is a metal roller which removes the residual toner and paper dust adhered on the
oil roller.
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e-STUDIO281c/351c/451c
FUSER UNIT / PAPER EXIT SECTION
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