COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)III. DEVELOPMENTA. OutlineThe developing assembly consists of three color toner cartridges and the developingrotary assembly to which they are mounted and the black toner cartridge.The developing rotary assembly rotates clockwise by the work of the developingrotary motor (M1); inside, the yellow, magenta, and cyan color toner cartridges arearranged in the order indicated and are positioned against the photosensitive drum asneeded.The black toner cartridge is positioned so that it always faces the photosensitivedrum; during development of black toner, all color toner cartridges are moved away sothat they will not face the photosensitive drum.The color developing cylinder and the black developing cylinder are rotated by thecartridge motor (M3).The developing assembly is equipped with four sensors, each serving to detect theposition of the developing rotary position (PS3), color toner cartridge level (PS621), pres-ence of a color toner cartridges (PS1901C), or color toner cartridge releasing lever(PS1902).A single switch is used to check the presence/absence of the black toner cartridge(SW644), and the toner antenna inside the black toner cartridge is used to detect thelevel of black toner.CHAPTER 4 IMAGE FORMATION SYSTEM4-10Download free service manual at http://printer1.blogspot.com
