Samsung SCX-8240NA-CAS - Manual (Page 204)

Troubleshooting_ 204
4. Pull the jammed paper gently out of the DADF.
5. Close the DADF input tray and the DADF cover. Load the removed
pages back into the DADF.
Original paper jam in front of scanner duplex path
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 duplex jam cover.