43856301TH Rev.3
19 /
Oki Data CONFIDENTIAL
2. Operating instructions
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ID unit
Waste toner area
Toner cartridge
Drum cleaning blade
(6) Fusing
When the paper passes through the heat roller and backup roller unit, heat
and pressure are applied to the toner image on the paper and the toner is
fused onto the paper.
The halogen lamps of 800W and 300W are built in heat roller. The backup
roller without built-in halogen lamp is heated by the heat transmission from the
heat roller. The fusing temperature is controlled by the temperature detected by
the thermistor that is not in contacting with the surface of the heat roller. On
the other hand, the temperature detected by the thermistor rubbing the surface
of backup roller is used for controlling the fusing temperature under specified
conditions. Furthermore, a thermostat is used to limit the temperature rise, if
the temperature rise of heat roller exceeds a set point, the thermostat would
be open and the voltage supply to the heater would be cut off. The backup
roller unit is pressed on the heat roller by the spring on both sides.
(7) Drum cleaning
The Unfused toner left on the OPC drum is cleaned up by the drum cleaning
blade, and all residual toner is collected in the waste toner area of the toner
cartridge.
Heat roller
Backup roller
Pad
thermistor
thermistor
Paper
Paper feeding path
thermostat
Fuser belt
(8) Electricity removal
The electricity on the surface of the OPC drum is attenuated by irradiating the
light to the surface of the OPC drum after transfer.
Electricity-removing
light PCB
Charging roller
OPC drum
Electricity-removing
light
