3-42 Service ManualPaper jamsAvoiding jamsMost paper jams can be avoided by correctly loading paper and specialty media in the printer.The following hints can help prevent paper jams:• Use only the recommended print media.• Do not overload the print media sources. Make sure the stack height does not exceed the maximum heightindicated by the stack line on the labels in the sources.• Do not load wrinkled, creased, damp, or curled print media.• Flex, fan, and straighten print media before loading it. If jams do occur with the print media, then try feedingone sheet at a time through the manual feeder.• Do not mix print media sizes, weights, or types in the same print media source.• Push all trays in firmly after loading them.Note: Make sure the media stack is below the maximum media fill indicators on the 250-sheet tray beforepushing the tray into the printer.• Make sure paper guides are positioned before loading the paper or specialty media.• Do not remove trays while a job is printing.• Before loading transparencies, fan the stack to prevent sheets from sticking together.• Do not use envelopes that:– Have excessive curl– Are stuck together– Are damaged in any way– Contain windows, holes, perforations, cutouts, or embossments– Have metal clasps, string ties, or metal folding bars– Have postage stamps attached– Have any exposed adhesive when the flap is in the sealed position• Use only recommended media. Refer to the User Guide for more information about which mediaprovides optimum results for the current printing environment.