Contact Sensor Hp Sensor - Canon imageRUNNER 1019J Service Manual

If presence of dust is detected at all points A, B, and C in this order at job end, the machine will indicate a reading
glass cleaning message in the control panel.
- Immediately before scanning (one sheet at a time)
The contact image sensor (CIS) does not move to detect dust.
The original is read at the position determined at job end or start. If presence of dust is detected there, the read
image is corrected.
Point Description
A Read reference position
B out 0.5 mm from the reference position to the inside of the guide
C About 1.0 mm from the reference position to the inside of the guide
0.5mm
A B C
Reading glass
lens
0.5mm
LED
Contact sensor
F-4-9
T-4-2
Chapter 4
Platen guide