Outline Of Paper Level Detection; Paper Level Detection Operation (Right/Left Deck) - Canon iR6570 series Service Manual

8.6.4 Outline of Paper Level Detection

The machine indicates the amount of paper inside the deck and the cassette in terms of 4 levels (including absence of paper) on its control panel:

8.6.5 Paper Level Detection Operation (right/left deck)

The machine uses 2 sensors to check the position of the deck bottom plate, and checks the level of paper based on the combination of sensor states (on/off).
The machine uses a special sensor to check the presence/absence of paper.
Paper level
100% to about 50%
about 50% to about
10%
about 10% or less
no paper
Paper sensor
Lifter
F-8-25
T-8-17
3 bars 100% to about 50% of capacity
2 bars about 50% to about 10% of capacity
1 bar 10% or less of capacity
no bar no paper
F-8-26
T-8-18
Right deck
[1] sensor [2] sensor sensor
(PS47) (PS48) (PS7)
ON ON ON
OFF ON ON
OFF OFF ON
OFF OFF OFF
Paper detecting lever
[1] [1]
[2] [2]
Paper level Paper level
(100% to (about 50%
about 50%) to about 10%)
Left deck
[1] sensor [2] sensor
(PS49) (PS50)
ON ON
OFF ON
OFF OFF
OFF OFF
Chapter 8
0009-3176
0009-3173
[1]
[2]
Paper level
(about 10%
or less)
sensor
(PS11)
ON
ON
ON
OFF
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