Canon ImageRunner 600 Service Manual page 250

b. Operation
In the case of the deck right/left, two sensors are used to detect the position of the deck, and
combinations of the states of the sensors (on/off) are used to find out the level of paper.
For the absence of paper, an exclusive sensor is used. (See 3. "Detecting the Presence/Absence
of Paper.")
Paper level
100% to about 50%
About 50% to about 10
About 10% or less
None
COPYRIGHT © 1999 CANON INC.
DC controller PCB
Figure 7-211 Construction of the Mechanism
Deck right
[1]
Sensor Sensor
(PS51)
(PS52)
ON
ON
OFF ON
OFF OFF
OFF OFF
Table 7-204 Combinations of Sensor States
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
CHAPTER 7 PICK-UP/FEEDING SYSTEM
[1]
[2]
Paper level
(100% to
about 50%)
[2]
Sensor
(PS22)
ON
ON
ON
OFF
[1]
[2]
Paper level Paper level
(about 50% (about 10%
to about 10%) or less)
Deck left
[1] [2]
Sensor Sensor
(PS54) (PS55)
ON ON
OFF ON
OFF OFF
OFF OFF
[1]
[2]
Sensor
(PS32)
ON
ON
ON
OFF
7-11