14-3.Developing Bias; Developing Bias - Minolta EP3010 Manual

1173SBM1403A

14-3. 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 Termi-
nal which follows the movement of the Magnet Roller.
Magnet Roller
Developing Bias PWB-A PJ27A-3
Control Signal
M-42
Bias Terminal
1139M018AA
ON OFF WIRING DIAGRAM
L H
1151T01MCA
2-F