HP 2200dt Service Manual - Page 52

Note CAUTION Transparency specifications Transparency construction is critical. Use only tray 1 to print transparencies. Send transparencies straight through the printer, entering at tray 1 and exiting from the rear output bin Transparencies used in the printer must be able to withstand 200 degrees C (392 degrees F), the printer's fusing temperature. To avoid damaging the printer, use only transparencies recommended for use in laser printers. Table 16. Transparency specifications Description Specification Surface resistivity 2.0 to 15 by 10 to the 10th ohm square. See "Inspect the rollers for colored ink buildup from preprinted logos or letterhead, and for toner buildup or spots. Inspect printed output for repetitive defects and smearing. If necessary, have users contact the forms vendor to ensure the paper's fusing compatibility with HP LaserJet printers." on page 40 Volume resistivity 1.2 to 15 by 10 to the 11th ohm-cm. See "Inspect the rollers for colored ink buildup from preprinted logos or letterhead, and for toner buildup or spots. Inspect printed output for repetitive defects and smearing. If necessary, have users contact the forms vendor to ensure the paper's fusing compatibility with HP LaserJet printers." on page 40 Finishing precision Cut sheet within 0.79 mm (0.031 in) of nominal and +0.20 degrees square. Fusing compatibility Transparency materials must be compatible with the heat and pressure of the fusing process. Materials must not discolor, melt, offset materials, or release hazardous emissions when heated to 200 degrees C (392 degrees F) for 0.1 second. See "Fusing-compatibility field test" on page 40 Caliper Caliper of 0.100 to 0.110 mm (.0039 to .0043 in). See "Caliper field test" on page 39 Storing print media Ideally, the printing and media storage environment should be at or near room temperature, and not too dry or too humid. Remember that paper is hygroscopic; it absorbs and loses moisture rapidly. Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate, while cold causes it to condense on the sheets. Heating systems and air conditioners remove most of the humidity from a room. As a paper package is opened and used, it loses moisture, causing streaks and smudging. Humid weather or water coolers can cause the humidity to increase in a room. As paper is opened and used it absorbs any excess moisture, causing light print and dropouts. Also, as paper loses and gains moisture it can distort. This can cause jams. As a result, paper storage and handling are as important as the paper-making process itself. Paper storage environmental conditions directly affect the feed operation. Users should not purchase more paper than can be easily used in a short time (about three months). Paper stored for long periods might experience heat and moisture extremes, which can cause damage. Planning is important to prevent damage to a large supply of paper. Unopened paper in sealed reams can remain stable for several months before use. Opened packages of paper have more potential for environmental damage, especially if they are not wrapped with a moisture-proof barrier. 36 Chapter 2 Operating requirements C7058-90936