CHAPTER 6 IMAGE FORMATION SYSTEM
6-32
COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.1 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
2. Measuring the Concentration of Color Toner on the Developing Cylinder
Assembly
The following shows the flow of operations used to measure and control the concentration of
color toner on the developing cylinder assembly:
Figure 6-403
X-SGNL
XLAON
X-REF
LED
RAM
Photo diode for
generation of
reference signal
Developing cylinder
Photodiode for
measurement of
reflected light
DC driver PCB
Reflecting
mirror
(M, C, Y into X)
SGNL initial
value
REF initial value
Rate of
amplification
LED ON (shines on developing cylinder)
Start key ON
Developing bias ON, developing cylinder ON (rotates)
Compares the initial data and the copy data to
compute the change in toner concentration.
Meaures the concentration of developer during copying
operation (SGNL-M/C/Y) and for reference (REF-M/C/Y)
during copying operation
Determines the initial developer concentration signal
(SGNL-M/C/Y) and initial reference signal (REF-M/C/Y)
(at time of installation, replacement of developer,
replacement of toner concentration sensor)
Содержание CLC 1130
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