Page: 135
Service Guide OF1050/2350/2450
Chapter 3 Board Description/Printer Operation
3.16.4 Developing
Toner is attracted to the electrostatic latent image on the EP (image) drum surface to convert it into a
visible toner image. Developing takes place at the contact between the EP (image) drum and the
devel-oping roller.
As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated
between the developing roller and the toner, allowing the toner to be attracted to the developing roller.
(The developing roller surface is charges positive and the toner, negative.)
The excess toner attracted to the developing roller is scraped off by the doctor blade, forming a thin
coating of toner on the developing roller surface.
Toner is attracted to the exposed part (low-potential part) of the EP (image) drum at the contact between
the EP (image) drum and the developing roller, making the electrostatic latent image visible.
An illustration of activities at the contact point of the image drum surface and the developing roller (arrow
marks denote the direction of the electric
field). Note
The toner supply roller and the developing roller are
supplied with bias voltages required during the developing process as shown below. -450 VDC is supplied
to the toner supply roller, -300 VDC to the developing roller.
Содержание OF1050
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Страница 145: ...Note Use the UNIQUE key to input special symbols Operations Press the START key Press the START key...
Страница 152: ...Case 2 Canceling member s from a group...
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Страница 395: ...Section 1 Cabinet Illustratio n Number OKIFAX Description Okidata Part Number Oki Part Number...
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