Canon imageRunner iR2270, Service Manual, Page: 40 / 233

Chapter 2
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2.5
Stack Tray Operation
2.5.1 Overview
0006-1973
This machine has a 1-stage stack tray to which the paper aligned/offset/stapled in the
process tray is ejected. When the first stack of paper is fed to the stack tray, the stack tray
paper presence sensor (PI8) is turned on.
The stack tray is moved up and down with the stack tray shift motor (M1).
The home position of the stack tray is where the paper surface sensor detects the upper
surface of the stack tray. If the stack tray is not at the home position when copying/printing
starts, the stack tray shift motor is operated to move the stack tray to the home position. The
lower limit of the stack tray is detected by the stack tray lower limit sensor (PI10). When
the stack tray lower limit sensor is turned on, the stack shift motor can run only in the
direction that leaves this sensor.
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