MINOLTA-QMS PagePro 4100 Series, Service Manual

Page: 58 / 126

43
3-4. Drum Charge
- The PC Drum is charged with static electricity before laser exposure.
- The Rotating Charge Brush and the Precharge-film are used for the charging method.
- The Rotating Brush charging and Precharge-film charging generate little ozone in the
printer. Because the charge is directly applied to the PC Drum, the PC Drum can be
charged by low voltage. The PC Drum is charged evenlyacross it’s entire surface.
- The Pre-charge Film supplies the charge to the PC Drum before being charged by the
Rotating Charge Brush to improve charging efficiency.
- The electric potential on the surface of the charged PC Drum is approximately -800 V.
1 Rotating Charge Brush 3 Ground (PC Drum)
2 PC Drum 4 Charge Bias (Rotating Charge Brush)
1
3
3
4
2
4