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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Various measurement data units may be checked in service mode.
Control display mode (DISPLAY)
Developer density (DENS)
Item
Description
Reference
SGNL-S-K
Light reflected by toner layer
192 to 352
REF-S-K
Intensity of direct light
464 to 544
Table 3-506
f.
Checking the Dirt on the Window
The LED is turned on during last rotation (LSTR) after copying operation so as to measure the light
reflected from the photosensitive drum without toner on it (SGNL-D-K).
If the sensor window is soiled at this time, the value of SGNL-D-K will be small. The ratio of the
measurement to the initial value (as determined by SINIT-K) is stored in memory as the correction value and
used to correct the output of the SALT sensor.
If the measurement SGNL-D-K is 60% or less of a specific value, ‘E020’ will be indicated.
Figure 3-546
Photo diode
LED
Photosensitive drum
Dirt on sensor window
Содержание Vizcam 1000
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