Operation; Pc Drum Charge Corona On/Off Control; Cleaning/Main Erase Mechanism - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
7.1

Operation

7.1.1

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 Bk
Color Developing Motor (M6)
Developing Clutch/Bk (CL2)
7.1.2

Cleaning/Main Erase mechanism

A. Cleaning/main erase operation
1. The Cleaning Blade is pressed up against the surface of the PC Drum, scraping resid-
ual 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 Col-
lecting 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.
Color PC Drum Motor Energized
Bk PC Motor Energized
Toner Collecting
Screw
Cleaning
Blade
Main Erase
Lamp
4036ma2539c0
2-19
Charge Corona section
Cleaning Blade
4036ma2251c0
4036ma2505c0