COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
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3. OPERATION AND TIMING
d. Detecting the Image Density
Like carriers, the Bk toner absorbs infrared light, allowing the measurement of the density of the toner
layer on the developing cylinder. Bk toner is supplied based on the amount of consumption computed with
reference to the count of the video signals carrying a Bk component. As shown in Figure 3-541, the video
signals from the image processor are counted to obtain a cumulative count by the video data counter.
Figure 3-541
Y,M,C,Bk
Y,M,C,Bk
Bk
Video controller PCB
Video signal
Video signal
Video data counter
Cumulative count
DC controller
CL4
CL5
Toner supply signal
Bk toner supply
clutch (upper)
Bk toner supply
clutch (lower)
Image processor PCB
Laser driver PCB
Содержание Vizcam 1000
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