Canon AD2 Service Manual page 11

2
Technology > Function > Pickup/Feed System > Paper Size Detection
■ Paper Size Detection
At the cassette pickup assembly, since the feed speed is increased, detection cannot catch
up with it. Thus, delay and stationary jam detection are not executed at the Cassette 1 Pre-
Registration Sensor. Instead of it, the Vertical Path Sensor executes the delay and stationary
jam detection. Since the residual jam should be detected on each cassette, the Cassette 1
Pre-Registration Sensor detects it. Because the Vertical Path Sensor is too close and it is
unnecessary to execute detection, the Vertical Path Sensor does not execute residual jam
detection.
Cassette 3 size switch B[SW2]
Cassette 3 size switch A [SW1]
Cassette 4 size switch A[SW3]
Cassette 4 size switch B[SW4]
2 Technology > Function > Pickup/Feed System > Paper Size Detection
Rear guide plate
Side guide plate
F-2-4
2-4
Cassette size
switch A
Rear detection
rink
Cassette size
switch B
Detection dial
Detection dial
Cassette 2 size switch B
F-2-5
2-4