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5-22 Functional Information
Image Formation System
The image formation system is the main system in the printer. It
consists of six stages:
When the Formatter Board sends the print signal to the Engine
Controller Board, it drives the Main Motor to rotate the Photosensitive
Drum, the Developing Cylinder, the Primary Charging Roller, and the
Transfer Charging Roller.
The Primary Charging Roller places a uniform negative charge on the
surface of the Photosensitive Drum. The laser beam modulated by
the video signal is illuminated on the Photosensitive Drum surface to
form the latent image on the Drum with the Laser Diode.
The latent image formed on the Photosensitive Drum is changed to a
visual image by the Toner on the Developing Cylinder, then
transferred to the paper by the Transfer Charging Roller. The residual
Toner on the Photosensitive Drum surface is scraped down with the
cleaning blade. The potential on the Drum is uniformed by the
Primary Charging Roller to prepare for a new latent image.
The Cartridge has a Toner sensor that detects the remaining Toner
level and the presence of the Cartridge.
If the Toner in the Cartridge becomes lower than the specified level or
if there is no Cartridge in the printer, it is reported to the Formatter.
1. Cleaning 4. Developing
2. Conditioning 5. Transferring
3. Writing 6. Fusing