COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)Step 2 (primary charging)In preparation for laser beam exposure, the surface of the photosensitive drum ischarged to a uniform negative potential. The machine’s primary charging consists indirectly charging the photosensitive drum.The primary charging roller is given a AC bias, in addition to the DC bias, to ensurethat the potential on the surface of the photosensitive drum will be uniform.Step 3 (laser beam exposure)When a laser beam is directed to the photosensitive drum, the charges in its light areabecome neutralized, turning the area into a latent static image.CHAPTER 1 GENERAL DESCRIPTION1-24Primary charging rollerAC biasDC biasPhotosensitive drumFigure 1-805Laser beamDark area Light areaFigure 1-806Download free service manual at http://printer1.blogspot.com
