Canon MF4500 Series Service Manual

22 2-182-18Technical Overview > Image Formation System > Overview/Configuration > Drum Cleaning BlockTechnical Overview > Image Formation System > Overview/Configuration > Drum Cleaning BlockStep 5: SeparationIn this step, DC negative bias is applied to the static eliminator according to the elasticity ofpapers to separate the papers from the photosensitive drum. The static eliminator is used tostabilize the paper feed system (prevention of toner stray that appears as polka-dots on printimages in a low-temperature, low-humidity environment), and neutralizes the electric chargeat the back of papers.MediaTransfer rollerStatic charge eliminatorPhotosensitivedrum■ Fixing BlockThis block applies pressure and heat to papers and the toner on them to fix toner images tothe papers.Step 6: FixingThis step employs on-demand fixing that fixes toner images transferred to papers on thepapers.Fixing heater Fixing filmTonerMediaPressure rollerF-2-24F-2-25■ Drum Cleaning BlockThe drum cleaning block removes the toner remained on the photosensitive drum.Step 7: Drum cleaningIn this step, toner remained on the photosensitive drum is removed.The cleaning blade scrapes the leftover toner on the surface of the photosensitive drum; thetoner is collected into the cleaner container.By implementing the above step, the surface of the photosensitive drum is cleaned.Cleaning bladeCleaner containerPhotosensitivedrumF-2-26