Xerox Phaser 6120 Service Manual page 244

Print Engine Theory of Operation
Toner Cartridge Rack Developing Position
To bring the Toner Cartridge Rack to a stop at the corresponding developing position, the rack
is rotated from the standby position 45° through pulse control of the Rack Motor.
Cartridge Replacement Position
When a request is made for replacing the Toner Cartridge of a specific color of toner (by
means of an input from the control panel, upon a toner empty condition, or through an input
made via the controller board), the Toner Cartridge Rack is rotated 70° from the developing
position through pulse control of the Rack Motor.
Phaser® 6120 Color Laser Printer Service Manual
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