Controlling The Color Toner Concentration Measurement Mechanism; Of The Photosensitive Drum - Canon CLC 1120 Service Manual

Reference:
The copier's toner reflects near infrared light, while the carrier (iron particles) of its developer
absorbs near infrared light. In other words, the near infrared reflected by the developer
decreases as the amount of toner in the developer decreases.
Be sure to execute FUNCTION>INSTALL>INIT-M/C/Y in service mode at time of instal-
lation or when the developer has been replaced or the toner concentration sensor has been replaced.
The various items of measurement data may be checked in service mode.
Item
REF-Y
REF-C
REF-M
SGNL-M
SGNL-C
SGNL-Y
3. Controlling the Color Toner Concentration Measurement Mechanism of the
Photosensitive Drum
The concentration of color toner on the photosensitive drum assembly is measured by the
sensor used to measure the concentration of black toner. (Figure 6-406).
For details of control, see the descriptions given for controlling the measurement of black toner
concentration.
COPYRIGHT © 1999 CANON INC.
Description
Y reference signal(Y-REF)
C reference signal (C-REF)
M reference signal (M-REF)
M toner concentration signal (M-SGNL)
C toner concentration signal (C-SGNL)
Y toner concentration signal (Y-SGNL)
Table 6-403
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
Adjustment value
(guide: 300 to 650)
(guide: 300 to 650)
(guide: 300 to 650)
818±41
818±41
818±41
6-33