Canon imageCLASS MF3110 Service Manual - Page 32
Image Formation
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Chapter 2ޓRunning H/F 5 2.3 Image Formation 2.3.1 Overview/Configuration 2.3.1.1 Overview [2] [1] [8] [7] 0002-8626 [6] F-2-3 [3] [4] [5] [1] Laser/scanner assembly [2] Laser beam [3] Blade [4] Developing cylinder T-2-3 [5] Photosensitive drum [6] Transfer charging roller [7] Primary charging roller [8] Cleaning blade In response to a print command, the engine controller turns on the main motor to drive the photosensitive drum, developing cylinder, primary charging roller, and transfer charging roller. Thereafter, the machine uses the primary charging roller to charge the surface of the photosensitive drum to an even, negative potential and, at the same time, directs the laser beam across the surface of the photosensitive drum. (The laser beam is modulated to according to the incoming video signals.) The image thus formed on the photosensitive drum is a static, latent image; it is turned into a visible image by means of the toner from the developing cylinder. The resulting toner image is then transferred to paper by the work of the transfer charging roller, and the paper is sent to the fixing assembly. The surface of the photosensitive drum is cleaned by the cleaning blade so that it is free of residual toner; after cleaning, the primary charging roller once again charges the surface to an even, negative potential to prepare for the formation of a new static, latent image. 2-4