Developing cylinder disengaging control
Whenever the developing cylinder is in contact with the photosensitive drum, toner is passed
onto the drum. At certain times, such as during ETB cleaning or during monochrome
printing, toner should not pass onto the drum, and the developing cylinder should not be in
contact with the drum. The bottom half of the print cartridge can pivot up and down, causing
the developing cylinder to either come in contact with or move away from the photosensitive
drum. A small block inside the printer causes each cartridge to pivot. When the block is
pushed up, the rear of the cartridge is pushed up, and the front of the cartridge swings down.
The developing cylinder disengages from the drum.
Figure 5-17. Developing cylinder
disengaging illustrates this process.
Figure 5-17.
Developing cylinder disengaging
The developing cylinders are disengaged only during monochrome printing or during ETB
cleaning. During monochrome printing, the developing cylinder in all cartridges except black
is disengaged. During ETB cleaning, the developing cylinders in all cartridges are
disengaged.
ENWW Image formation system 153
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