User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–41
Outline
The image formation system is the nucleus of the printer. Its major
components are the photoconductor cartridge, transfer drum, toner
carousel with toner cartridges, and fuser assembly.
Upon receiving the
/PRNT signal from the I/O controller, the DC
controller completes the designated processing and sends the print
sequence command to the mechanical controller. The mechanical
controller drives various motors and the press cams, which transfer
drive throughout the image formation system.
The primary charging roller negatively charges the surface of the
photosensitive drum just before the drum surface is irradiated by the
laser beam. The latent image formed across the photosensitive drum is
made visible by toner from the toner cartridge, and the image is trans-
ferred to the paper on the transfer drum. The surface of the photosensi-
tive drum is cleaned to remove residual toner, and the latent imaging
cycle continues.
These steps are taken for each color. The paper is fed onto the transfer
drum and remains there until the transfer process has been completed.
The paper is then separated from the transfer drum and is delivered to
the fuser assembly.
Developing Cylinder
Primary Charging Roller
Photoconductor Cartridge
Photosensitive
Drum
Separation
Discharge
Fuser
Assembly
Separation
Claw
Cleaning Brush
Discharge Roller
Attraction
Roller
Transfer Drum
Toner Carousel