Canon iR2200 Series, Service Manual

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COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 8 PAPER DECK-L1
8-6 P
1.3 Deck Lifter
1.3.1 Detecting the Presence/Absence of Paper
The lifter of the deck is connected to a reel by means of a cable, and is driven by the deck
lifter motor (M2D), whose direction of rotation changes the direction (up/down) of the
movement of the lifter.
When the compartment is slid inside the deck, the deck open detecting switch (SW1D) is
pushed; the deck then starts to move up when the deck open sensor (PS9D) detects the light-
blocking plate. It will stop to move up when the deck lifter position sensor (PS4D) detects
the top face of the stack of paper placed on it.
If, for some reason, the lifter fails to stop moving up after the sensor lever blocks the deck
lifter position sensor, the deck lifter upper limit sensor (PS3D) will go ON to stop it and
thereby to prevent image.
When the deck open switch (SW100D) is pushed, on the other hand, the lifter starts to
move down, and continues to move down until it leaves the sensor lever of the deck paper
supply position sensor (PS8D; falling edge of the sensor output).
When supplied, the paper pushes the lever of the deck paper supply position sensors, and
the lifter will move farther down until the stack of paper leaves the sensor lever.
Each time paper is supplied, the lifter repeats its descent movement until the deck lifter
lower limit detecting switch (SW2D) is pushed (point of maximum paper supply).