Lexmark X548 Series, Service Manual

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General information
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Storing paper
Use these paper storage guidelines to help avoid jams and uneven print quality:
• For best results, store paper where the temperature is 21°C (70°F) and the relative humidity is 40%. Most
label manufacturers recommend printing in a temperature range of 18 to 24°C (65 to 75°F) with relative
humidity between 40 and 60%.
• Store paper in cartons when possible, on a pallet or shelf, rather than on the floor.
• Store individual packages on a flat surface.
• Do not store anything on top of individual paper packages.
Using recycled paper and other office papers
As an environmentally conscious company, Lexmark supports the use of recycled office paper produced
specifically for use in laser (electrophotographic) printers. In 1998, Lexmark presented to the US government a
study demonstrating that recycled paper produced by major mills in the US, fed as well as non-recycled paper.
However, no blanket statement can be made that all recycled paper will feed well. Lexmark consistently tests its
printers with recycled paper (20–100% post-consumer waste) and a variety of test paper from around the world,
using chamber tests for different temperature and humidity conditions. Lexmark has found no reason to
discourage the use of today's recycled office papers, but generally the following property guidelines apply to
recycled paper.
•
Low moisture content (4–5%)
•
Suitable smoothness (100–200 Sheffield units, or 140–350 Bendtsen units, European)
Note:
Some much smoother papers (such as premium 24 lb laser papers, 50–90 Sheffield units) and
much rougher papers (such as premium cotton papers, 200–300 Sheffield units) have been engineered to
work very well in laser printers, despite surface texture. Before using these types of paper, consult your
paper supplier.
• Suitable sheet-to-sheet coefficient of friction (0.4–0.6)
• Sufficient bending resistance in the direction of feed
Recycled paper, paper of lower weight (<60 g/m
2
[16 lb bond]) and/or lower caliper (<3.8 mils [0.1 mm]), and
paper that is cut grain-short for portrait (or short-edge) fed printers may have lower bending resistance than is
required for reliable paper feeding. Before using these types of paper for laser (electrophotographic) printing,
consult your paper supplier. Remember that these are general guidelines only and that paper meeting these
guidelines may still cause paper feeding problems in any laser printer (for example, if the paper curls
excessively under normal printing conditions).