Oki B431L6, Руководство по обслуживанию

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Oki Data CONFIDENTIAL
2. Operational explanation
44983601TH Rev.1
2-5 /
4. Transfer
The transfer roller, which is from conductive sponge material, is created to meet intimate attachment
of image drum roller surface and feeding paper. The feeding paper is set up on the surface of image
drum. Plus charge, which is the converse polarity with toner polarity, is applied from the backside of the
paper.
As high plus voltage is applied to transfer roller from the power supply, the plus charge on the transfer
roller surface is induced and transferred to the paper while the paper contact the transfer roller. The
negative charged toner, which has been attracted to the image drum surface, is transferred to the
surface of feeding paper by the plus charge of the backside of the paper.
Image drum
Transfer roller
Paper
Power
5. Fusing
After the termination of transfer the unsettled toner image is settled to paper by heat and pressure
while passing between Heat roller and Back up roller. Heat roller is Teflon coated and is mounted by
heater that can generate heat (Halogen lamp).
The thermistor that contacts the Heat roller adjusts the Heat roller temperature to the temperature
specified by the menu complying with the paper width. For safety the thermostat shuts off the voltage
supply to the Heater by opening the thermostat in the case of abnormally temperature increasing.
The back up roller is held by the pressure springs on each terminal due to the pressure applied.
Separating nail
Paper
Heater
Heat roller
Thermistor
Backup roller
Pressuring spring
Thermostat