Canon CP660, Service Manual

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COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
III. DEVELOPMENT
A. Outline
The developing assembly consists of three color toner cartridges and the developing
rotary assembly to which they are mounted and the black toner cartridge.
The developing rotary assembly rotates clockwise by the work of the developing
rotary motor (M1); inside, the yellow, magenta, and cyan color toner cartridges are
arranged in the order indicated and are positioned against the photosensitive drum as
needed.
The black toner cartridge is positioned so that it always faces the photosensitive
drum; during development of black toner, all color toner cartridges are moved away so
that they will not face the photosensitive drum.
The color developing cylinder and the black developing cylinder are rotated by the
cartridge motor (M3).
The developing assembly is equipped with four sensors, each serving to detect the
position 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 the
level of black toner.
CHAPTER 4 IMAGE FORMATION SYSTEM
4-10
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