Canon LASER SHOT LBP-3600 User Manual page 420

13
If the paper feeder is installed, make sure that there is no
paper remaining in the area from the back to the inside of the
printer.
14
To install the duplex unit, hold it upright and match the
positioning pins on the holes on the back of the printer.
Push the duplex unit firmly until it clicks.
Positioning pin
Paper Jams
7
7-37