Samsung SCX-8240NA-CAS - Manual (Page 207)

Troubleshooting_ 207
6. Turn the misfeed clearing wheel in the direction of the arrow to remove
the jammed paper.
7. Pull the jammed paper gently out of the DADF.
8. Close the DADF input tray and the DADF cover. Load the removed
originals back into the DADF.
Original paper jam in duplex exit area of scanner
Click this link to open an animation about clearing a jam.
1. Remove any remaining pages from the DADF.
2. Open the DADF cover.
3. Open the DADF input tray.