HP LaserJet 5000 Service Manual - Page 114
Conditioning the Drum, Photosensitive, Primary charging, roller, AC bias
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Conditioning the Drum After the drum is cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the drum with the primary charging roller. The primary charging roller is coated with conductive rubber with an AC bias applied to erase any residual charges and maintain a constant drum surface to create a uniform negative potential on the drum surface. The amount of DC voltage is modified by the print density setting. Primary charging roller AC bias DC bias Photosensitive Drum Figure 5-10 Primary Charging Roller EN Image Formation System 5-23
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EN
Image Formation System
5-23
Conditioning the Drum
After the drum is cleaned, it must be conditioned. This process
consists of applying a uniform negative charge on the surface of the
drum with the primary charging roller. The primary charging roller is
coated with conductive rubber with an AC bias applied to erase any
residual charges and maintain a constant drum surface to create a
uniform negative potential on the drum surface. The amount of DC
voltage is modified by the print density setting.
Figure 5-10
Primary Charging Roller
Photosensitive
Drum
Primary charging
roller
AC bias
DC bias