HP 9100 series - Manual (Page 171)

ENWW Solving print problems 169
z Dropouts
• A single sheet of media might be defective. Try reprinting the job.
• The moisture content of the media is uneven or the media has moist spots on the
surface. Try printing on different media. See Choosing the print media for
recommended media types.
• The media lot is bad. The manufacturing processes can cause some areas to reject ink.
Try a different type of media.
z Uniform gray background
• Make sure that the input tray is in place.
• Change the media to a lighter-basis weight.
• Check the environment. Very dry (low-humidity) conditions can increase the amount of
background shading.
z Printout is slanted or skewed
• Make sure that the media is loaded correctly and that the media guides are not too tight
or too loose against the media stack. See Loading the print media for more information.
• Check the media type and quality. See Choosing the print media for recommended
media types.
z Curl or wave
• Check the media type and quality. Both temperature and humidity can cause media to
curl. See Choosing the print media for recommended media types.
• The media might have been in the input tray for a long time. Turn over the stack of
media in the input tray. Also, try rotating the media 180 degrees in the input tray.
z Wrinkles or creases
• Make sure that the media is loaded correctly. See Loading the print media for more
information.
• Check the media type and quality. See Choosing the print media for recommended
media types.
• Make sure that the media is fresh.
• Turn over the stack of media in the tray. Also, try rotating the media 180 degrees in the
input tray.
z Regular horizontal bands appear in the text or graphics
• The printheads might need to be aligned. The printheads are automatically aligned
when a printhead is replaced. However, you might notice print-quality improvement by
performing the alignment procedure. See
Aligning the printheads for more information.
• The all-in-one needs to be calibrated. Perform the calibration as described in the
Calibrating the linefeed section.
z Patches
• The all-in-one might not have enough memory to process the job. An “insufficient
memory” message prints. For the current job, you can reduce the resolution or print to a
smaller size of media. If the memory problems persist, consider increasing the amount
of memory in the all-in-one. See
Installing memory modules for more information.
z Smudging
• You selected borderless printing in the HP photo and imaging software. The all-in-one
does not support borderless printing.