COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)VIII. IMAGE FORMATIONA. OutlineThe machine’s photosensitive medium is a seamless drum, and is constructed asshown in Figure 1-701. The photosensitive drum consists of a photoconducting layer(organic photosensitive conductor, OPC) on the outside and an aluminum base (con-ductor) on the inside.The printer unit forms images as follows:A color original is exposed to light, and the light reflected by the original is separatedinto three primary colors for detection by a CCD. Using the data from the CCD, a laserbeam is directed to the photosensitive drum to develop a specific color (complementaryof the filter in question), and the resulting image is transferred to the intermediate trans-fer drum (primary transfer). This series of processes is repeated for each color (Y, M, C,and Bk) in sequence.The toner image on the intermediate transfer drum is then transferred to paper (sec-ondary transfer), and fused to generate a color print.CHAPTER 1 GENERAL DESCRIPTION1-20Scanning lampLens CCDLaser scannerassembly Waste toner casePre-exposure LEDSecondary pre-transfercharging assemblyDensitysensorIntermediate transferdrum (ITD)Face-down deliveryPrimary chargingrollenFace-updeliveryBlack tonercartridgeDeveloping rotaryassemblyUpper fixing rollerITD cleaningLower fixing rollerSeparation staticeliminatorSecondary transfer beltMultifeederRegistration rollerPick-up roller Feeding rollerFeeding rollerSeparation rollerSeparation rollerPick-up rollerDuplexing unitCassette 1Cassette 2Color tonercartridgeImage processingassemblyPhotosensitivedrumFigure 1-801Download free service manual at http://printer1.blogspot.com
