Canon Puncher Unit-BS1 Service Manual page 27

8. Pull out the guide in the direction of the arrow (removed guide will not be used.).
• 2 Screws (removed screws are used in step 10))
CAUTION:
Do not touch the sensor area when holding the puncher unit.
9. Removed the tape of the punch unit.
Screw
Screw
Guide
2x
23
4. Installation