Lexmark X748DE Printer User Manual


 
Before loading letterhead, flex the stack to prevent sheets from sticking together.
Page orientation is important when printing on letterhead. For information on how to load letterhead, see:
“Loading the standard or optional 550sheet tray” on page 59
“Loading the multipurpose feeder” on page 71
Tips on using transparencies
Print samples on the transparencies being considered for use before buying large quantities.
When printing on transparencies:
Feed transparencies from any tray or drawer, except the optional 2,000sheet highcapacity feeder.
Use transparencies designed specifically for laser printers. Check with the manufacturer or vendor to ensure
transparencies are able to withstand temperatures up to 170°C (338°F) without melting, discoloring, offsetting, or
releasing hazardous emissions.
To prevent print quality problems, avoid getting fingerprints on the transparencies.
Before loading transparencies, flex the stack to prevent sheets from sticking together.
We recommend Lexmark part number 12A8240 for lettersize transparencies and Lexmark part number 12A8241
for A4size transparencies.
Tips on using envelopes
Print samples on the envelopes being considered for use before buying large quantities.
Use envelopes designed specifically for laser/LED printers. Check with the manufacturer or vendor to ensure that
the envelopes can withstand temperatures up to 220°C (446°F) without sealing, wrinkling, curling excessively, or
releasing hazardous emissions.
For best performance, use envelopes made from 90 g/m
2
(24 lb bond) paper or 25% cotton. Allcotton envelopes
must not exceed 70 g/m
2
(20 lb bond) weight.
Use only new envelopes from undamaged packages.
To optimize performance and minimize jams, do not use envelopes that:
Have excessive curl or twist
Are stuck together or damaged in any way
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
Adjust the width guides to fit the width of the envelopes.
Note: A combination of high humidity (over 60%) and the high printing temperature may wrinkle or seal envelopes.
Printing 90