Applying bias removes the toner from each roller. The toner on the primary charging roller is
transferred to the photosensitive drum, and the toner on the toner charging roller is
transferred to the developing cylinder. Then the cleaning blade scrapes the toner on the
photosensitive drum into the waste toner container, as described above. The toner on the
developing cylinder is returned to the toner case.
Figure 5-29. Primary charging roller and
toner charging roller cleaning illustrates this process.
Figure 5-29.
Primary charging roller and toner charging roller cleaning
Color plane registration calibration
The diameter of the rollers in individual print cartridges or ETB units varies from one to
another. For this reason, whenever a new print cartridge or ETB unit is installed, the printer
must adjust the rotational speed of the rollers in order to ensure good color plane
registration. Color misregistration occurs when the individual colors do not print directly on
top of one another, causing poor print quality. This adjustment consists of two steps:
NEED TITLE HERE !!!!!!
1. Direct calibration. The DC controller uses the color registration detection unit to
measure the color registration range directly and calibrate the color registration.
ENWW Image formation system 165
To Next Page
Loading...