Detecting The Size Of Paper On The Manual Feed Tray - Canon iR5000i Service Manual

CHAPTER 5 PICK-UP/FEEDING SYSTEM

2.4.2 Detecting the Size of Paper on the Manual Feed Tray

The side guide on the manual feed tray is set by the user to suit the width of paper. The
resistance of the variable resistor changes in keeping with the movement of the side guide,
and the reading is sent to the DC controller PCB for identification of the width of paper. The
machine is not equipped with a mechanism to detect the length of paper, requiring the user
to select a specific size.
The detected width of paper is for control of the laser, and the length of paper is detected
when the manual feed tray is used with reference to the period of time during which the pre-
registration paper sensor (PS23) remains on.
The paper width basic value must always be entered newly whenever the variable resistor
has been replaced.
Side guide
(rear)
COPIER>ADJUST>CST-ADJ>MF-A4R
Used to enter the paper width basic value for A4R for the manual feed tray.
COPIER>ADJUST>CST-ADJ>MF-A6R
Used to enter the paper width basic value for A6R for the manual feed tray.
COPIER>ADJUST>CST-ADJ>MF-A4
Used to enter the paper width basic value for A4 paper for the manual feed
tray.
5-24 P
Variable
resistor (SVR1)
DC controller PCB
F05-204-02
COPYRIGHT © 2001 CANON INC.
Manual feed tray
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
Side guide (front)