Developing Assembly - Canon 1000 Service Manual

3. OPERATION AND TIMING
E. Developing Assembly
1. Outline
The CLC1000 is equipped with four photosensitive drums, and a developing assembly is fixed in
position for each drum for development of Y, M, C, and Bk. The developing cylinder for each color is driven
by the developing motor installed for the respective color.
Toner is supplied to developing assemblies differently among Y, M, and C developing assemblies and
Bk assembly. In the case of the Y, M, and C developing assemblies, infrared light is shone on the toner layer
on the developing assemblies and the reflected light is measured to determine the amount of toner to supply;
on the other hand, in the case of the Bk developing assembly, video signals representing the Bk component
and the output of the SALT sensor are used to compute the amount of toner to supply. (See chapter 4. E.
Developing Assembly, 4-b. "Measuring Color Toner Density" and "4-e. Measuring Toner Density by the
SALT Sensor," respectively.)
Pick-up motor
M10
CL4
CL5
Developing cylinder
Bk
Photosensitive drum
M18Bk
Bk developing motor
3-102
COPYRIGHT © 2001 CANON INC.
Bk sub hopper
Bk main hopper
C
M18C
C developing motor
Figure 3-526
C hopper
M
M18M
M developing motor
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Y hopper
M hopper
Y
M18Y
Y developing motor