Developing Roller Bias - Mita DP-2800 Service Manual

5A2

Developing roller bias

The developing bias is adjusted so that the toner, charged positive while each particle is
rubbing each other in the developer, is selectively developed onto the area of low potential
by adhering. The bias is AC weighted, positive DC power source.
Since the gap between the developing roller and the drum is wider than the average
diameter of the toner, the toner should fly over to the drum surface to accomplish
development. This method is known as the non-contact development method.
Blade
Toner
Develop. roller
Drum
Toner sensor
AC + DC
Toner
Drum Develop. roller
4-11