Functions - Toshiba e-STUDIO 200L Service Manual

13.3 Functions

1) Heater lamp
The heater lamps are halogen lamps to apply heat to the fuser roller. The fuser unit in this equip-
ment has 2 heater lamps with different functions each other. One has a coil wound up on its center
and this part generates heat. The other one has coils wound up on its both ends and these parts
generate heat. The one has a coil on its center is called the center heater lamp and the one has coils
on its both ends is called the side heater lamp.
The heater lamps are fixed on the inside of the fuser roller to heat it up. The heater lamps do not
rotate even when the fuser roller is rotating.
2) Fuser roller
The fuser roller applies heat onto the paper and is heated by the heater lamps installed inside of the
fuser roller. The heat from this roller fuses toner onto the paper. The fuser roller in this equipment is
a thin roller which enhances heat conduction, and thus the warming-up time is shortened.
3) Pressure roller
The pressure roller is a sponge roller which assures the nip amount of the fuser roller. The pressure
from the spring presses the paper onto the fuser roller to fuse the toner onto the paper efficiently. A
sponge roller with a lower hardness is adopted for the pressure roller in this fuser unit to enable
envelopes to pass through.
4) Separation fingers
The separation fingers are installed, five above the pressure roller and six above the fuser roller, in
order to separate the paper adhered on each roller.
5) Cleaning roller
The cleaning roller is an aluminum roller which removes the residual toner or paper dust adhered on
the fuser roller. The cleaning process is performed as follows:
1. The stain (residual toner) adheres on the fuser roller.
2. The stain (residual toner) on the fuser roller is transferred to the pressure roller.
3. The stain (residual toner) on the pressure roller is then transferred to the cleaning roller and is
caked on the cleaning roller.
1
Fuser roller
Stain Pressure roller
The stain (residual toner) tends to remain more on the cleaning roller than on the fuser roller or pres-
sure roller.
Therefore, the stain (residual toner) once adhered on the cleaning roller does not adhere again on
the pressure roller or fuser roller.
June 2004 © TOSHIBA TEC
2
Cleaning roller
Fig.13-2
13 - 3
3
Stain
e-STUDIO200L/202L/230/232/280/282 FUSER UNIT
13
Stain