Canon imageCLASS MF5850dn Basic Operation Manual page 259

Clearing Jams
2
Hold the paper cassette with both hands
and remove it from the machine.
3
Open the duplex print transport guide,
holding its tab (A) on the left side inside
of the machine.
4
Hold both sides of any jammed paper and
gently pull it out.
Do not force a jammed paper out of the machine.
12-12
5
Close the duplex print transport guide.
6
Hold the paper cassette with both hands
and set it back into the machine.
7
Open and close the front cover to reset
the machine.
If you are using the multi-purpose tray, close it
before opening the front cover. To open the
front cover, push the open button (A).