Toner Concentration; Drum; Of The Photosensitive Drum - Canon 1130 Service Manual

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
REF.
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 installation 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).
The result of measurement is used as feedback when changing the target concentration of each
toner.
For principles of control, see the descriptions given for controlling the measurement of black

toner concentration.

COPYRIGHT © 2002 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 CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
(guide: 300 to 650)
(guide: 300 to 650)
(guide: 300 to 650)
818±41
818±41
818±41
Adjustment value
6-33