OKIDATA DOC-IT3000, Service Manual

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Service Guide DOC-IT3000/4000
Chapter 2 Principles of Operation
Developing
Toner is attracted to the latent image on the image drum surface to convert it into a visible toner
image.
Developing takes place at the contact between the image drum and the developing 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 charged positive. The toner is charged negative.
The toner attracted to the developing roller is scraped off by the blade, forming a thin coat of toner
on the developing roller surface.
Toner is attracted to the exposed part (low-potential part) of the image drum surface, making the
latent image visible.