In The Paper Exit Area; In The Duplex Unit Area - Samsung ML-2850D User Manual

In the paper exit area

1 Open and close the front cover. The jammed paper is automatically
ejected from the printer.
2 Gently pull the paper out of the output tray.
If you do not see the jammed paper or if there is any resistance
when you pull, stop and go to the next step.
3 Open the rear cover.
4 Pull the guide rear on each side down and remove the paper.
Return the guide rear to its original position.
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5 Close the rear cover. Printing automatically resumes.
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guide rear
9.3

In the duplex unit area

If the duplex unit is not inserted correctly, paper jam may occur. Make
sure that the duplex unit is inserted correctly.
Duplex jam 0
1 Pull the duplex unit out of the printer.
2 Remove the jammed paper from the duplex unit.
If the paper does not come out with the duplex unit, remove the
paper from the bottom of the printer.
<Troubleshooting>
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duplex unit