User manual

95.08.23.11.30
Color LaserWriter 12/600 PS Basics & Theory 1–71
Toner Carousel Control: Outline
The toner carousel consists of four cylindrical bays clustered around a
central press assembly. Each bay is occupied by a single cartridge.
Fetch When you load a cartridge into the printer, that color is said to be in a
“fetch” position. As the cartridge clicks into place, nine separate pins
engage. These pins assure a solid coupling that is critical to the
mechanical functionality of the printer. See “Toner Cartridge Installa-
tion” for more information.
Note: The “home” position of the carousel is the same as the magenta
“fetch” position. This is the position of the carousel during standby.
Stop During printing or startup, the carousel rotates counterclockwise to
bring the cartridge to a position facing the photosensitive drum. This is
known as the “stop” position. From the fetch to the stop positions, the
cartridge housing revolves approximately 135 degrees relative to the
inner workings of the cartridge. Therefore, the developing cylinder is
fully exposed at the stop position. It has not yet meshed with a drive
train. See “Toner Cartridge Stop” in the “Carousel Rotation” section
for more information.
Press The cartridge press assembly at the center of the carousel keeps its
position relative to the chassis and does not rotate with the carousel.
The moment the cartridge reaches a stop position, the press assembly
shifts it laterally and presses its developing cylinder against the photo-
sensitive drum. This is known as the “press” position and is the only
stage in which the inner workings of the cartridge are mechanically
driven. Press occurs first for magenta, followed in order by cyan,
yellow, and black.
See “Toner Cartridge Press” in the “Carousel Rotation” for more infor-
mation.