The following hints can help you avoid jams.
Make sure the paper lies flat in the tray.
Do not remove trays while the printer is printing.
Do not load trays, the multipurpose feeder, or the envelope feeder while the printer is printing. Load them prior to printing, or wait for a prompt to load them.
Do not load too much paper. Make sure the stack height does not exceed the indicated maximum height.
Make sure the guides in the paper trays, multipurpose feeder, or envelope feeder are properly positioned and are not pressing too tightly against the paper or envelopes.
Push all trays in firmly after loading paper.
Use only recommended paper or specialty media. For more information, see Paper types and weights supported by the printer.
Do not load wrinkled, creased, damp, bent, or curled paper.
Flex, fan, and straighten paper before loading it.
Do not use paper that has been cut or trimmed by hand.
Do not mix paper sizes, weights, or types in the same stack.
Make sure all sizes and types are set correctly in the printer control panel menus.
Store paper per the manufacturer's recommendations.
To reduce wrinkling, use the Envelope Enhance menu in the Paper menu.
Do not feed envelopes that:
Have excessive curl or twist
Have windows, holes, perforations, cutouts, or embossing
Have metal clasps, string ties, or folding bars
Have an interlocking design
Have postage stamps attached
Have any exposed adhesive when the flap is in the sealed or closed position
Have bent corners
Have rough, cockle, or laid finishes
Are stuck together or damaged in any way