Oki C911 Maintenance Manual page 19

Oki Data CONFIDENTIAL
(6) Fusing
The toner image transferred on the paper is fused to the paper by heat and
pressure when the paper passes through between the portion of the fuser belt
(mainly comprised with the fuser roller, the pat and the fuser belt) and the pressure
roller in the fuser unit.
The fuser belt unit is heated by internal heater Assy. with specified wattage (e.g.
1200W in 230V environment). The fusing temperature is determined by the value
of the temperature that is the measurement of the thermistor. The thermistor is
arranged as it is contacted with the inside of the fuser belt.
There is also a thermostat for safety purposes. When the heater temperature rises
above a specific temperature, the thermostat opens and shuts down the power
supplied to the heater. The pressure roller is pressed against the fuser belt by press
springs those arranged both sides of the pressure roller.
Heater Assy
Thermostat
Fuser roller
Paper
45530603TH Rev.2
Thermistor
Fuser belt
Thermistor
Pad
Pressure roller
(7) Drum cleaning
Unfixed toner remaining on the OPC drum is removed by the drum cleaning blade
and collected into the waste toner area of the toner cartridge.
(8) Belt cleaning
Toner remaining on the intermediate transfer belt is scraped off by the belt cleaning
blade and collected into the waste toner box of the transfer belt unit.
Spot color-
Drum
Intermediate transfer belt
Belt drive roller
Belt cleaning blade
Fuser unit
Second transfer roller unit
(9) Intermediate transfer roller cleaning
Toner remaining on the intermediate transfer roller is return to transfer belt by
electric field cleaning, and clean by belt cleaning structure.
2. DESCRIPTION OF OPERATION
Y-Drum M-Drum C-Drum K-Drum
Waste-Toner-Box
Paper
Timing roller
2-4