Fixing pressure roller cleaning sequence

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Fixing pressure roller cleaning sequence
Purpose:
To prevent the dirt of the pressure roller causing the dirt of the paper back side.
Starting conditions:
When the detected temperature of sub thermistor (front) or (rear) is higher 18 deg C or
more than the one of the main thermistor.
Operation:
After completion of the last rotation, the temperature control is executed so that the
fixing heater turns on and the toner on the pressure roller is melted to transfer it to
the fixing film. After transferring the toner to the fixing film, the fixing motor is rotated
slightly to shift the nip area, so that re-transferring the toner to the pressure roller is
prevented.
Completion conditions:
This sequence is finished when either following condition is satisfied.
• After 5 seconds (maximum 10 sec) from shifting to the pressure roller cleaning
sequence.
• When the next job is started during the pressure roller cleaning sequence.