Detecting The Level Of Paper - Canon iR2200 Service Manual

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CHAPTER 5 PICK-UP/FEEDING SYSTEM

3.9 Detecting the Level of Paper

The level of paper inside the cassette is detected by the light-blocking plate of the lifter
gear and a sensor in relation to the distance over which the lifter moves up. When paper
starts to run out, the lifter gradually moves up; when paper fully runs out, the cassette paper
sensor (Q1604 for cassette 1) identifies the condition as indicating the absence of paper.
If the cassette is full of paper
Pickup roller
Paper
Lifter
Note: The diagram is a view from the rear of the copying machine.
F05-309-02 Detecting the Level of Paper in the Cassette (upper cassette holder)
The amount of paper inside the cassette is indicated on the control panel in terms of four
levels (including the absence of paper).
Indication
3 bars
2 bars
1 bar
no bar
0:
light-blocking plate over the sensor.
1:
light-blocking plate not over the sensor.
5-22 P
COPYRIGHT © 2001 CANON INC.
Light-blocking plate
F05-309-01
Sensor 2
Sensor 1
Light-blocking plate
Level
100% to about 50% of capacity
50% to about 10% of capacity
about 10% or less of capacity
No paper
T05-309-01
2000 2000 2000 2000
Lifter
If the cassette is empty of paper
Sensor 1
0
1
1
-
CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
Sensor 2
0
0
1
-

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