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COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 5 PICK-UP/FEEDING SYSTEM
5-22 P
If the cassette is full of paper If the cassette is empty of paper
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 Level Sensor 1 Sensor 2
3 bars 100% to about 50% of capacity 0 0
2 bars 50% to about 10% of capacity 1 0
1 bar about 10% or less of capacity 1 1
no bar No paper - -
0: light-blocking plate over the sensor.
1: light-blocking plate not over the sensor.
T05-309-01
Sensor 1
Sensor 2
Light-blocking plate
Lifter
Paper
Pickup roller
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.
F05-309-01
Lifter
Light-blocking plate