3. OPERATION AND TIMING
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
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3. Controlling the Development Characteristics (SALT)
a.
Outline
The printing density changes over time because of the following factors:
• Deterioration of the developer
• Deterioration of the photosensitive drum
• Changes in the environment
To make up for the changes, the density of the density pattern formed on the photosensitive drum is
measured by the SALT sensor, and the toner supply period is corrected based on the resulting
measurements.
Figure 3-514
Figure 3-515
Y
M
C
Bk
SALT sensor
SALT sensor
ATR sensor
Transfer belt
SALT sensor
SALT sensor
DC controller
ATR sensor
ATR sensor
Direct light intensity/
reflected light intensity signal
Direct light intensity/
reflected light intensity signal
Direct light intensity/
reflected light intensity signal
Direct light intensity/
reflected light intensity signal
Photosensitive drum
LED
Photo diode for direct light
intensity measurement
Photo diode for reflected light
intensity/measurement
Shutter
Shutter solenoid
(SL17Y, M, C, Bk)
Density pattern
Fulcrum
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