Canon ImageRunner iR8500 Series Service Manual page 437

Paper level
100% to about
50%
About 50% to
about 10
About 10% or
less
None
In the case of cassette 3/4, the resistance of the variable resistor operating in conjunction with the movement of the lifter drive shaft is used to find out the
level of paper.
DC controller PCB
F-9-38
T-9-26
Deck right
[1] Sensor [2] Sensor Sensor
(PS51) (PS52) (PS22)
ON ON ON
OFF ON ON
OFF OFF ON
OFF OFF OFF
[1] [1]
[2] [2]
Paper level Paper level Paper level
(100% to (about 50% (about 10%
about 50%) to about 10%) or less)
Deck left
[1] Sensor [2] Sensor Sensor
(PS54) (PS55) (PS32)
ON ON ON
OFF ON ON
OFF OFF ON
OFF OFF OFF
Chapter 9
[1]
[2]
9-33