HP LaserJet M4349 Multifunction Printer series - Manual (Page 227)

Problem Cause Solution
Black dots or streaks appear on the
copy. Ink, glue, correction fluid, or an unwanted
substance might be on the automatic
document feeder (ADF) or flatbed
scanner. Clean the device. See Clean the device
on page 156 .
Copies are too light or dark. The darkness setting needs to be
adjusted. Touch Copy , and then touch Image
Adjustment. Adjust the Darkness slider
to lighten or darken the image.
Text is unclear. The sharpness setting needs to be
adjusted.
The image should be optimized for text.
To adjust the sharpness, touch Copy ,
and then touch Image Adjustment.
Adjust the Sharpness slider to the right to
increase the sharpness.
To optimize the image for text, touch
Copy and then touch Optimize Text/
Picture . Select Text .
Media-handling problems
Problem Cause Solution
Poor print quality or toner adhesion The paper is too moist, too rough, too
heavy or too smooth, or it is embossed
or from a faulty paper lot. Try another kind of paper, between 100
and 250 Sheffield, 4 to 6% moisture
content.
Dropouts, jamming, or curl The paper has been stored incorrectly. Store paper flat in its moisture-proof
wrapping.
The paper has variability from one side
to the other. Turn the paper over.
Excessive curl The paper is too moist, has the wrong
grain direction, or is of short-grain
construction Open the rear output bin, or use long-
grain paper.
The paper varies from side-to-side. Turn the paper over.
Jamming, damage to device The paper has cutouts or perforations. Use paper that is free of cutouts or
perforations.
Problems with feeding The paper has ragged edges. Use high-quality paper that is made for
laser printers.
The paper varies from side-to-side. Turn the paper over.
The paper is too moist, too rough, too
heavy or too smooth, has the wrong grain
direction, or is of short-grain construction
or it is embossed or from a faulty paper
lot. ● Try another kind of paper, between
100 and 250 Sheffield, 4 to 6%
moisture content.
● Use long-grain paper.
ENWW Solve copy problems 213