HP LaserJet 4250 - Manual (Page 158)

3. Insert the staple cartridge into the stapler unit, and rotate the stapler unit toward the rear
of the printer until the unit snaps into place.
The stapler needs to reload after clearing a staple jam, so the first few documents (up to
five) might not be stapled. If a print job is sent and the stapler is jammed or is out of staples,
the job will still print as long as the path to the stacker bin is not blocked.
Solving repeated jams
If paper jams occur frequently, try the following:
● Check all the jam locations. (See Clearing jams .) A piece of media might be stuck
somewhere in the printer. Even a small torn piece of media in the printer path can cause
repeated jams.
● Check that the trays are properly adjusted. (See Loading trays .) The guides should click
into place without being too tight against the media.
● Check that media is correctly loaded in the trays and that the trays are not overfilled.
Make sure that the stack is under the tabs and below the maximum-height indicators.
See
Loading trays .
● Check that all trays and paper-handling accessories are completely inserted into the
printer. (If a tray is opened during a print job, this might cause a jam.)
● Check that all covers and doors are closed. (If a cover or door is opened during a print
job, this might cause a jam.)
● Try printing to a different output bin. (See Understanding media output options .)
● The sheets might be sticking together. Try bending the stack to separate each sheet. Do
not fan the stack.
● If you are printing from tray 1, try reducing the size of the stack.
● If you are printing from the optional envelope feeder, make sure that it is loaded correctly
(with the bottom envelopes in slightly farther than the top envelopes). (See
Loading
envelopes in the optional envelope feeder .)
● If you are printing small sizes, feed the media with the short-edge first. (See Guidelines
for custom-size paper .)
● Turn over the stack of media in the tray. Also try rotating the paper 180 degrees.
● Check the characteristics of the paper or other print media that you are using. Use only
media that meets HP specifications. (See
Paper specifications .) Try using different
media to see if the problem goes away. Do not use curled, deformed, damaged, or
irregular media.
● Check that the environmental conditions for the printer are met. (See Operating
environment .)
● Avoid using paper that has already been used in a printer or copier.
● Try using paper from a freshly opened ream.
146 Chapter 4 Problem solving ENWW