Developing Bias - Minolta Di151 Service Manual

9-3.

Developing Bias

• A bias voltage is applied to the Developing Sleeve and Toner Regulator Blades to charge
the toner.
• A bias voltage is also applied to the Bias Seal to prevent toner left on the Sleeve Roller
after development from falling down over the areas inside the copier.
• The amount of toner sticking to the surface of the PC Drum varies according to the
potential difference between the voltage on the surface of the PC Drum (Vi) and that on
the surface of the Sleeve Roller (Vb).
• The greater the potential difference, the more the amount of toner.
Toner Regulator Blades
Developing Sleeve
Developing Bias
Toner Regulator Blades
Bias Seal
CONTROL SIGNAL
PWB-A PJ4A-7
M-21
PC Drum
4007M019AC
ON OFF WIRING DIAGRAM
L H
Bias Seal
1-F