Minolta EP1080 - Developing Bias

1139C03MAA
7-3. Developing Bias
A negative voltage (Vb = Developing Bias voltage) is applied to the Sleeve
Roller to prevent a foggy background on the copy. The amount of toner
attracted onto the surface of the PC Drum depends on how much lower the
PC Drum surface potential (Vi) is than Vb (i.e., the potential difference).
•
When the potential difference is large, a greater amount of toner is
attracted.
•
When the potential difference is small, a smaller amount of toner is
attracted.
Because the Magnet Roller of this copier is movable, a flat spring is used as
the Bias Terminal which follows the movement of the Magnet Roller.
Bias Terminal
Magnet Roller
M-20