Xerox Phaser 6120 Service Manual page 237

Developing Roller Drive
The Developing Roller is driven by the Developing Motor (M3) and Intermediate Gear.
When the Toner Cartridge Rack is stationery at the developing position, the Developing
Roller Drive Gear comes into mesh with the Intermediate Gear. The Developing Roller is
then rotated through the drive provided by the Developing Motor (M3) and Intermediate
Gear.
[1] Developing Roller Drive Gear
[2] Intermediate Gear
Developing Drive Control
Rack Motor (M2)
Developing Motor (M3)
Developing bias AC
Developing bias DC
Main Motor (M1)
Charge output bias
Phaser® 6120 Color Laser Printer Service Manual
[3] Developing Motor (M3)
Polygon Motor Energized
K Toner
Developing
Position
Print Start
Y M
7-17
Print Engine Theory of Operation
[1]
[2]
[3]
4139to1530c0
Standby Position
Belt Positioning
Sensor Activated
C K
Y
4139to2102e0