Canon Satera LBP3900 User Manual page 66

CAUTION
Push the duplex unit gently to avoid catching your hands. Be careful not to
hurt your hands.
11
If the sub-output tray is being used, open it, and if the output
tray is being used, close the sub-output tray.
12
Close the front cover.
13
If the paper feeder is installed, pull out the paper cassette.
Pull out the paper cassette until it stops a.
a
65