HP LaserJet 4250 Service Manual - Page 46

Guidelines for using paper For best results, use conventional 75- to 90-g/m2 (20- to 24-lb) paper. Make sure that the paper is of good quality, and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges. If you are unsure what type of paper you are loading (such as bond or recycled), check the label on the package of paper. CAUTION Some paper might cause print-quality problems, jamming, or damage to the printer. Symptom Poor print quality or toner adhesion Problem with paper ■ Too moist, too rough, too smooth, or embossed ■ Ragged edges ■ Faulty paper lot Solution ■ Try another kind of paper, one that is between 100 to 250 Sheffield, with 4 to 6% moisture content. ■ Change the fuser mode. See Printquality submenu. Dropouts, jamming, curl ■ Stored improperly ■ Store paper flat in its moistureproof wrapping. Increased gray background shading ■ Too heavy ■ Use lighter paper. ■ Use a higher toner-density setting. See Print-quality submenu. ■ Too smooth ■ Use less-smooth, rougher paper. Excessive curl, problems with feeding ■ Too moist, wrong grain direction, or short-grain construction ■ Use the rear output bin. ■ Turn the paper stack over in the tray. ■ Use long-grain paper. ■ Store paper in a drier environment. ■ Change the fuser mode. See Printquality submenu. NOTE Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography. Do not use raised letterhead.The printer uses heat and pressure to fuse toner to the paper. Make sure that any colored media or preprinted forms use inks that are compatible with the printer's temperature of 230°C (446°F) for 0.05 second. Avoid using media that has been damaged from being previously used in a printer or copier. (Do not print on both sides of envelopes, transparencies, or labels.) Paper weight equivalence table Use the following table to determine approximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equivalent of 20-lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in row 3, second column) and scan across the row to the cover weight (in the fourth column). The equivalent is 28 lb. 32 1 Product information