Drum Charge - MINOLTA-QMS PagePro 1200 Series Service Manual

4-3.

Drum Charge

(1) Overview
• The PC Drum is charged with static electricity before laser exposure.
• The Drum Charge Brush and the Pre-charge Film are used for the charging method.
• The Drum Charge Brush and Pre-charge 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 volt-
age. At the same time, the PC Drum can be charged stably and evenly.
• The Pre-charge Film supplies the charge to the PC Drum before being charged by the Drum
Charge Brush to improve the charging efficiency.
• The Drum Charge Brush is turned by the drive of the Main Motor (M1) via a gear.
• The electric potential on the surface of the charged PC Drum is approximately-800 V.
Laser Exposure
Development
Sleeve Roller
1
PagePro 1200 Series Mechanical / Electrical
Drum Cartridge
Drum Cover
1. Drum Charge Brush
2. PC Drum
3. Earth
4
2 4. Drum Charge Brush voltage
3
49
Drum Charge Brush
Paper Dust Remover
Pre-charge Film
Image Transfer Roller
PC Drum
4121s030
4110s031