COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)Step 7 (secondary transfer)In this step, the toner on the intermediate transfer drum is transferred to paper, whichis forced against the intermediate transfer drum by the secondary transfer belt assemblypushed up by the secondary transfer belt cam.In this step, continuous application of a positive bias on the secondary transfer beltcauses the surface of the belt to take on a negative potential, possibly leading to sepa-ration faults if left unattended. To prevent faults, a negative DC bias is applied at the endof secondary transfer for removing charges from the belt.During multiple initial rotation, a negative DC bias is applied to prevent soiling theback of paper; i.e., the toner adhering to the surface of the secondary belt is returned tothe intermediate transfer drum.To prevent excessive increases of charges on the transfer belt caused by continuousapplication of positive DC bias on the secondary transfer belt, a negative DC bias isapplied to the separation charging assembly to remove charges from the belt at the endof secondary transfer.CHAPTER 1 GENERAL DESCRIPTION1-29PaperDC biasIntermediate transfer drumSecondary transferbelt assemblyFigure 1-810Download free service manual at http://printer1.blogspot.com
