Dust Detection In Stream Reading Mode <Ir7086 - Canon imageRUNNER 7095 Service Manual

Chapter 5
Advise the user to clean the area where the CCD stops in stream reading if the message has appeared. A
label indicating the points for stream reading (for small-size and large-size) is attached to the rear of the
copyboard glass.
If a jam has occurred, the machine will not execute dust detection at the end of a job. If the ongoing job is
cancelled, it will execute dust detection at the end of operation.
Small-size point of
reference for reading
SERVICE MODE:
COPIER>OPTION>BODY>DFDST-L1 (level 2)
use it to adjust dust detection level between sheets (for small size paper)
COPIER>OPTION>BODY>DFDST-L2 (level 2)
use it to adjust dust detection level at the end of a job (for small size paper)
COPIER>OPTION>BODY>DFDST-L3 (level 2)
use it to adjust dust detection level between sheets (for large size paper)
COPIER>OPTION>BODY>DFDST-L4 (level 2)
use it to adjust dust detection level at the end of a job (for large size paper)
5.3.5.2 Dust Detection in Stream Reading Mode <iR7086>
In addition to the common points for stream reading, the machine uses an additional 4 points at intervals
of 0.5 mm to avoid areas of dust (in total, 5 points).
If it detects dust, however, it changes the point of reading to prevent dust from appearing in images. The
detection of dust is executed at the end of each single job that uses stream reading; the machine moves the
ADF belt idly when stream reading is selected and identifies any black line as an area of dust.
When it detects dust, it resets the current point of stream reading, and uses the point of reference on the
leftmost edge for dust detection; if dust is detected, it moves the point of stream reading to the right by 1
point (0.5 mm) for detection of dust for a second time. If dust is not detected, the machine uses that point
as the point for stream reading. If dust is detected once again, it will use the next point. If dust is detected
at all 5 points, the machine will indicate the message "Copyboard Glass Soiled," which will remain unit
the ADF is opened and the copyboard glass is cleaned.
5-18
Label
185mm
385mm
Points of cleaning
F-5-39
B C A
F-5-40
Large-size point of
reference for reading
D
E
0011-2230