OKIDATA OF2600, Service Manual

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The exposed portion of the image drum contains a more positive charge than the development roller (-100
vdc vs -300 vdc). Therefore, toner is attracted to the exposed areas of the image drum, making the
electrostatic latent image visible.
NOTE:
The toner supply roller and the developing roller are supplied with the bias voltages required during the
developing process. The toner supply roller is charged to -450 vdc. The developing roller is charged to
-300 vdc.
1.5.10 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 by the printer control board in accordance with signals from the main 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.