Canon 2/3 Hole Puncher Unit-A1 Service Manual page 20

2. After the paper is fed from the position where the punch inlet sensor (PS301) detects the paper trailing edge to a given
position, the paper is switched back and fed until it bumps against the paper stopper guide.
3. The paper is punched. The punch waste is ejected into the punch waste tray.
Paper
Paper
Punch Waste Tray
Paper Stopper Guide
Punch Inlet Sensor
(PS301)
Paper Stopper Guide
Punch Waste
14
2. Technical Explanation