Service manual

220 Troubleshooting ENWW
Embossed media
Embossed media is not recommended for use in HP LaserJet printers. Media is embossed by
stamping an image into the media by compressing the media fibers together at approximately
200 degrees C (392 degrees F), and sometimes by applying a thin metal foil to the surface. The
printer fusing process can loosen the foil; loose foil can interfere with the mechanical and
electronic operation of the printer.
Embossed paper, with or without foil, can also cause multifeed jams. Multiple embossed print
media sheets tend to stick to one another.
Media with cutouts or perforations
Avoid media with cutouts or perforations for these reasons:
● Cut fibers absorb more moisture and can increase waviness and media curl. This decreases
the print quality near the cutout or perforated area.
● The cutting knife leaves a sharp edge on the cutout or perforation. If this sharp edge is facing
the print cartridge drum during printing it can scratch the drum surface.
● If printing occurs over a cutout hole the transfer roller is contaminated with unused toner.
Light streaks can result on the paper from the contaminated roller.
Adhesive labels
Labels are defined as media with a pressure-sensitive adhesive backing. Label stock includes
the top sheet, the adhesive, and the carrier sheet (also referred to as the backing). To prevent
media jams and feed problems, always use the rear output tray when printing on labels. You must
use the following guide lines when using labels:
● Labels must be cut long grain (as opposed to short grain).
● Labels must totally cover the carrier sheet (no spaces between the labels).
● Labels must contain only acrylic-based adhesives.
● Labels must contain no excessive adhesive. (Adhesive from some labels can cause jamming
resulting from buildup in the printer mechanism. The adhesive should not come into direct
contact with the printer at any time.)
● Labels must meet Hewlett-Packard specifications for fusing compatibility.
● Labels must meet Hewlett-Packard specifications for caliper.
● Labels must have a carrier sheet that is not too smooth (which can cause the feed rollers to
slip).
Table 25. Adhesive label construction
Labels cover entire page
Carrier sheet exposed only
in vertical columns
Carrier sheet exposed in
perimeter margins