OKIDATA OF1000, Руководство по обслуживанию

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Service Guide OF1000
Chapter 2 Principles of Operation
2.5.10 Printing
Refer to the Printing Process Diagram .
Printing is accomplished as follows.
· Approximately - 1.3 Kvdc is supplied to the charge roller. This causes the drum to charge to
approximately - 750 vdc.
· The LED head is turned ON in accordance with signals from the printer control board. This
causes a latent electrostatic image to be formed on the surface of the drum.
· Through the development process, a toner image replaces the electrostatic image.
· A + 1 Kvdc charge is applied to the transfer roller. This causes the toner image to be transferred
to the receive paper.
· Heat and pressure cause the toner image to become fused to the receive paper. The 150 degree
Centigrade fusing temperature is attained by turning a 400 watt halogen lamp ON. The fusing
temperature is controlled by a thermistor. In the event of a thermistor failure, a temperature fuse
will OPEN, turning off the quartz lamp, and preventing equipment damage.
· The residual toner is removed from the drum.
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