HP LaserJet M4345 Multifunction Printer series - Manual (Page 219)

Solve print-quality problems
This section helps you define print-quality problems and what to do to correct them. Often print-
quality problems can be handled easily by making sure that the device is correctly maintained, using
print media that meets HP specifications, or running a cleaning page.
Print-quality problems associated with media
Some print-quality problems arise from the use of inappropriate media.
● Use media that meets HP specifications. See Select print media .
● The surface of the media is too smooth. Use media that meets HP specifications. See Select
print media .
● The moisture content is uneven, too high, or too low. Use media from a different source or from
an unopened ream.
● Some areas of the media reject toner. Use media from a different source or from an unopened
ream.
● The letterhead you are using is printed on rough media. Use a smoother, xerographic media. If
this solves your problem, ask the supplier of your letterhead to use media that meets the
specifications for this device. See
Select print media .
● The media is excessively rough. Use a smoother, xerographic media.
● The driver setting is incorrect. To change the media type setting, see Control print jobs .
● The media that you are using is too heavy for the media type setting that you selected, and the
toner is not fusing to the media.
Print-quality problems associated with the environment
If the device is operating in excessively humid or dry conditions, verify that the printing environment
is within specifications. See
Printing and paper-storage environment .
Print-quality problems associated with jams
Make sure that all sheets are cleared from the paper path. See Clear jams .
● If the device recently jammed, print two to three pages to clean the device.
● If the sheets do not pass through the fuser and cause image defects on subsequent documents,
print three pages to clean the device. If the problem persists, print and process a cleaning page.
See
Clean the device .
Image defect examples
Use the examples in this image-defect table to determine which print-quality problem you are
experiencing, and then see the corresponding reference pages to resolve the problem. These
examples identify the most common print-quality problems. If you still have problems after trying the
suggested remedies, contact HP Customer Support.
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