Canon iR C6800 Series Service Manual page 928

Hide thumbs Also See for iR C6800 Series:

Table of Contents

13.3.2.6.7 Soiling in the Form of a Ring

If, for some reason, fine particles (e.g., of oil) make their way inside a color developing assembly, electrical discharge

is likely to occur between the metal particles on the surface of the developing cylinder and the photosensitive drum,

causing soiling in the form of a ring.

Field Remedy

Shift SW1 SW2 (DIP switch) on the HV2 PCB to ON. (At time of shipment, these switches are kept to OFF.)

If SW1 is OFF and SW2 is OFF, the AC component of the developing bias is 1,800 Vp p (default).

If SW1 is ON and SW2 is ON, the AC component of the developing bias is 1,600 Vp p.

A decrease in the AC component of the developing bias will limit the increase in potential occurring instantaneously

between the metal particulars on the developing cylinder and the surface of the photosensitive drum, thus making

electrical discharge less likely.

Chapters

Table of Contents