Paper Path System - Canon WS8400 Service Manual

Chapter 2

2.5.4 Paper path system

Media sensor
The photo reflection-based media sensor detects if paper is on the platen.
The sensor detects the presence of paper by receiving the sensor light reflected from the paper.
Feed roller home position sensor
The feed roller home position sensor detects the change from white (transparent) to black (opaque) of the reference area of the scale on the code wheel
when the power is turned on and sets the home position for LF decentration correction.
Feed roller encoder
The feed roller encoder detects the carriage position from the feed roller pulley slit when driving.
2-40
Media sensor
F-2-44
Feed roller home
position sensor
Feed roller
encorder
0008-3898