Operation; Pc Drum Charge Corona On/Off Control; Cleaning/Main Erase Mechanism - Konica Minolta bizhub c450 Service Manual

11. Charge Corona section

11.1 Operation

11.1.1

PC Drum Charge Corona ON/OFF control

• The grid voltage (Vg) applied to the Grid Mesh is controlled through the image stabiliza-
tion control.
Drum Charge Corona Bias Y, M, C
Drum Charge Corona Bias K
Color Developing Motor (M6)
Developing Clutch/K (CL2)
11.1.2

Cleaning/Main Erase mechanism

A. Cleaning/main erase operation
1. The Cleaning Blade is pressed up against the surface of the PC Drum, scraping
residual toner off the surface (forward blade system).
2. Toner, which has been scraped off the surface of the PC Drum, is fed by the Toner
Collecting Screw back toward to the Conveying Screw in the rear of the machine. It
is then collected in the Waste Toner Collecting Box.
3. The surface of the PC Drum after the image transfer process is irradiated with light
from the Main Erase Lamp. This neutralizes any potential left on the surface of the
PC Drum.
30
Color PC Drum Motor Energized
K PC Motor Energized
Toner Collecting
Screw
Cleaning
Blade
Main Erase
Lamp
4036ma2539c0
Theory of Operation Ver. 1.0 Mar. 2005
Cleaning Blade
4036ma2251c0
4036ma2505c0