Samsung SCX-8240NA-CAS - Manual (Page 221)

Troubleshooting_ 221
Paper jam bottom of duplex path (Jam Duplex Regi.)
Click this link to open an animation about clearing a jam.
The fuser area is hot. Take care when removing paper from the
machine.
1. Open the right door.
2. Remove the jammed paper by gently pulling it straight out.
3. Close the right door.
Paper jam in exit area (Jam Exit Face down)
Click this link to open an animation about clearing a jam.
1. Gently pull the paper out of the output tray.
2. Open and close the front door. Printing automatically resumes.
If the optional standard finisher or booklet finisher is installed, remove
the jammed paper as shown below.
If this paper jam persists, make sure the bin full sensor is unfolded.