Canon 2/3 Hole Puncher Unit-A1 Service Manual page 23

2. The paper is fed from the position where the punch inlet sensor (PS301) detects the paper trailing edge to a given position
(punch position) and stops.
3. The paper is punched. The punch waste is ejected into the punch waste tray.
Paper
Paper
Punch Waste Tray
17
2. Technical Explanation
Punch Inlet Sensor
(PS301)
Punch Waste