Samsung ProXpress C306x series User Manual page 115

Clearing paper jams
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In the duplex unit area
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Clearing original document jams
When an original document jams in the document feeder, a warning message appears on the display.
To avoid tearing the document, remove the jammed document slowly and carefully.
To prevent document jams, use the scanner glass for thick, thin or mixed paper- originals.
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4. Troubleshooting