Samsung MultiXpress M537x series Basic Manual page 224

Clearing paper jams
5 Remove the jammed paper by gently pulling it straight out.
6 Close the right bottom door.
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Paper jam in the multi-purpose tray
Click this link to open an animation about clearing a jam.
1 If the paper is not feeding properly, pull the paper out of the machine.
2 Open and close the front door to resume printing.
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9. Troubleshooting