HP LaserJet M1120 User Manual

							ProblemCauseSolution
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The amount of background toner
shading becomes unacceptable.The media might not meet HP specifications.Use a different paper with a lighter basis
weight. See 
Paper and print mediaon page 31.
The priority input tray might be installed
incorrectly.Make sure that the priority input tray is in
place.
The print-density setting is too high.Decrease the print-density setting through
the print driver. This decreases the amount
of background shading.
Very dry (low humidity) conditions can
increase the amount of background shading.Check the product environment.
The print cartridge might be defective. If you
are using a non-HP print cartridge, no
messages appear on the product control
panel.Replace the print cartridge. See Print
cartridge on page 73.
Toner smears appear on the
media.The media might not meet HP specifications.Use media that meets HP specifications.
If toner smears appear on the leading edge
of the paper, the media guides are dirty, or
debris has accumulated in the print path.Clean the media guides and the paper path.
See 
Clean the paper path on page 75.
The fuser temperature might be too low.In the printer driver, make sure the
appropriate media type is selected.
Use the archive print feature to improve
toner fusing. See 
Archive print on page 49.
The toner smears easily when
touched.The product is not set to print on the type of
media on which you want to print.In the printer driver, select the Paper/
Quality tab and set Paper Type to match
the type of media on which you are printing.
Print speed might be slower if you are using
heavy paper.
The media might not meet HP specifications.Use media that meets HP specifications.
The paper path might need cleaning.Clean the paper path. See Clean the paper
path on page 75.
The power source might be defective.Plug the product directly into an AC outlet
instead of into a power strip.
The fuser temperature might be too low. Use the archive print feature to improve
toner fusing. See 
Archive print on page 49.
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							ProblemCauseSolution
Marks repeatedly appear at even 
intervals on the page.
The product is not set to print on the type of
media on which you want to print.
In the printer driver, make sure that the
appropriate media type is selected. Print
speed might be slower if you are using
heavy paper.
Internal parts might have toner on them.The problem typically corrects itself after a
few more pages.
The paper path might need cleaning.Clean the paper path. See Clean the paper
path on page 75 .
The print cartridge might be damaged.If a repetitive mark occurs at the same spot 
on the page, install a new HP print cartridge.
See Print cartridge on page 73 .
The printed page contains 
misformed characters.
The media might not meet HP specifications.Use a different paper, such as high-quality
paper that is intended for laser printers.
If characters are incorrectly formed so that
they produce a wavy effect, the laser scanner
might need service.
Verify that the problem also occurs on the
configuration page. If so, contact HP. See
www.hp.com/support/LJM1120  or the 
support flyer that came in the product box.
The printed page is curled or
wavy.
The product is not set to print on the type of
media on which you want to print.
In the printer driver, make sure the
appropriate media type is selected. 
If the problem persists , select a media type that uses a lower fuser temperature, such 
as transparencies or light media.
The media might have been in the input tray
too long.
Turn over the stack of media in the tray.
Also, try rotating the media 180° in the input tray.
The media might not meet HP specifications.Use a different paper, such as high-quality 
paper that is intended for laser printers.
Both high temperature and humidity can
cause paper curl.
Check the product environment.
Text or graphics are skewed on
the printed page.
The media might be loaded incorrectly or the
input tray might be too full.
Verify that the media is loaded correctly and
that the media guides are not too tight or too
loose against the stack. See Load paper
and print media on page 35 .
The media might not meet HP specifications. Use a different paper, such as high-quality 
paper that is intended for laser printers.
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							ProblemCauseSolution
The printed page contains
wrinkles or creases.The media might be loaded incorrectly or the
input tray might be too full.Turn over the stack of paper in the input tray,
or try rotating the paper 180° in the input
tray.
Verify that the media is loaded correctly and
that the media guides are not too tight or too
loose against the stack. See 
Load paperand print media on page 35.
The media might not meet HP specifications.Use a different paper, such as high-quality
paper that is intended for laser printers.
Air pockets inside envelopes can cause them
to wrinkle.Remove the envelope, flatten it, and try
printing again.
Toner appears around the printed
characters.The media might be loaded incorrectly.Turn over the stack of paper in the tray.
If large amounts of toner have scattered
around the characters, the paper might have
high resistivity.Use a different paper, such as high-quality
paper that is intended for laser printers.
An image that appears at the top
of the page (in solid black) repeats
farther down the page (in a gray
field).Software settings might affect image
printing.In your software program, change the tone
(darkness) of the field in which the repeated
image appears.
In your software program, rotate the whole
page 180° to print the lighter image first.
The order of images printed might affect
printing.Change the order in which the images are
printed. For example, have the lighter image
at the top of the page, and the darker image
farther down the page.
A power surge might have affected the
product.If the defect occurs later in a print job, turn
the product off for 10 minutes, and then turn
on the product to restart the print job.
Media-handling problems
Use the information in this section when the product experiences media-handling problems.
Print-media guidelines
●For best results, make sure that the paper is of good quality, and free of cuts, nicks, tears, spots,
loose particles, dust, wrinkles, voids, staples, and curled or bent edges.
●For best-quality printing, use a smooth type of paper. Generally, smoother media produces better
results. .
●If you are unsure what type of paper you are loading (such as bond or recycled), check the label
on the package of paper.
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							●Do not use media that is designed for inkjet printers only. Use media that is designed for laser
printers.
●Do not use letterhead paper that is printed with low-temperature inks, such as those used in some
types of thermography.
●Do not use raised or embossed letterhead.
●The product uses heat and pressure to fuse toner to the paper. Make sure that any colored paper
or preprinted forms use inks that are compatible with this fusing temperature (200°C or 392°F for
0.1 second).
CAUTION:Failure to follow these guidelines could cause jams or damage to the product.
Solve print-media problems
The following problems with media cause print-quality deviations, jamming, or even damage to the
product.
ProblemCauseSolution
Poor print quality or toner
adhesionThe 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, with 4 to 6% moisture content.
Dropouts, jamming, or curlThe 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 curlThe paper is too moist, has the wrong grain
direction, or is of short-grain constructionUse long-grain paper.
The paper varies from side-to-side.Turn the paper over.
High fuser temperature is curling the paper.Turn on the Less paper curl setting.
At the control panel, press Setup, use the
arrow buttons to select Service, and then press
OK. Use the arrow buttons to select Less paper
curl, press OK, use the arrow buttons to select
On, and then press OK.
Jamming, damage to
productThe paper has cutouts or perforations.Use paper that is free of cutouts or
perforations.
Problems with feedingThe 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.
Print is skewed (crooked). The media guides might be incorrectly
adjusted.Remove all media from the input tray,
straighten the stack, and then load the media
in the input tray again. Adjust the media guides
to the width and length of the media that you
are using and try printing again.
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							ProblemCauseSolution
More than one sheet feeds at
one time.The media tray might be overloaded.Remove all media from the tray, and then
return some of the media to the tray. See 
Load
paper and print media on page 35.
The media might be wrinkled, folded, or
damaged.Verify that the media is not wrinkled, folded, or
damaged. Try printing on media from a new or
different package.
The media might have been fanned before it
was loaded.Load media that was not fanned. Loosen ream
by twisting paper stack.
Media might be too dry.Load new paper that was stored properly.
The product does not pull
media from the media input
tray.The product might be in manual feed mode.●If Manual feed appears on the product
control-panel display, press OK to print
the job.
●Verify that the product is not in manual
feed mode and print your job again.
The pickup roller might be dirty or damaged.Contact HP. See www.hp.com/support/
LJM1120 or the support flyer that came in the
product box.
The paper-length adjustment control in tray 1
is set at a length that is greater than the media
size.Adjust the paper-length adjustment control to
the correct length.
Performance problems
Try the tips in this section if pages exit the product, but have nothing printed on them, or when the product
does not print any pages.
ProblemCauseSolution
Pages print but are totally
blank.The sealing tape might still be in the print
cartridge.Verify that the sealing tape has been
completely removed from the print cartridge.
The document might contain blank pages.Check the document that you are printing to
see if content appears on all of the pages.
The product might be malfunctioning.To check the product, print a configuration
page.
Certain media types can slow the print job. Print on a different type of media.
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							ProblemCauseSolution
Pages did not print. The product might not be pulling media
correctly.See Media-handling problems on page 93.
The media might be jamming in the product.Clear the jam. See Clear jams on page 83.
The USB cable or the network cable might be
defective or incorrectly connected. ●Disconnect the cable at both ends and
reconnect it.
●Try printing a job that has printed in the
past.
●Try using a different USB or network
cable.
The product IP address might have been
changed.From the control panel, print a configuration
page. Confirm the IP address with that listed in
the Properties dialog box.
The product might not be set up as the default
printer.Open the Printers or Printers and Faxes
dialog box, right click the product, and then
click Set as Default Printer.
The product might have encountered an error.Check the control panel for an error message.
See 
Control-panel messages on page 80.
The product might be paused or offline.Open the Printers or Printers and Faxes
dialog box, and verify that the product status is
Ready. If it is Paused, right-click the product
and click Resume Printing.
The product might not be receiving power.Check the power cord and verify that the
product is turned on.
Other products are running on your computer. The product might not share a USB port. If you
have an external hard drive or network
switchbox that is connected to the same port
as the product, the other device might be
interfering. To connect and use the product,
disconnect the other device or use two USB
ports on the computer.
Copy problems
Prevent copy problems
The following are a few simple steps you can take to improve copy quality:
●Use quality originals.
●Load the media correctly. If the media is loaded incorrectly, it might skew, causing unclear images
and problems with the OCR program. See 
Load paper and print media on page 35 for instructions.
●Use or make a carrier sheet to protect your originals.
NOTE:Verify that the media meets HP specifications. If the media meets HP specifications, recurring
feed problems indicate the pickup roller or separation pad is worn. Contact HP. See 
www.hp.com/
support/LJM1120 or the support flyer that came in the product box.
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							Image problems
ProblemCauseSolution
Images are missing or faded.The print-cartridge might be defective.Replace the print cartridge. See Print
cartridge on page 73.
The original might be of poor quality.If your original is too light or damaged, the
copy might not be able to compensate, even
if you adjust the contrast. If possible, find an
original document in better condition.
The contrast settings might be set
incorrectly.Use the control-panel Lighter/Darker button
to change the contrast setting.
The original might have a colored
background.Colored backgrounds might cause images in
the foreground to blend into the background,
or the background might appear in a
different shade. If possible, use an original
document without a colored background.
Vertical white or faded stripes
appear on the copy.The media might not meet
HP specifications.Use media that meets HP specifications.
The print-cartridge might be defective.Replace the print cartridge. See Print
cartridge on page 73.
Unwanted lines appear on the
copy.
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The flatbed scanner might be dirty.Clean the flatbed scanner. See Clean the
scanner glass on page 65.
 
The photosensitive drum inside the print
cartridge might have been scratched.Install a new HP print cartridge. See Printcartridge on page 73.
Black dots or streaks appear on
the copy.Ink, glue, correction fluid, or an unwanted
substance might be on the flatbed scanner.Clean the flatbed scanner. See Clean the
scanner glass on page 65.
The power to the product might have
fluctuated.Reprint the job.
Copies are too light or dark.The printer driver or product software
settings may be incorrect.Verify that the quality settings are correct.
See the product software Help for more
information about changing the settings.
Text is unclear. The printer driver or product software
settings may be incorrect.Verify that the quality settings are correct.
Verify that the EconoMode setting is off.
See the product software Help for more
information about changing the settings.
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							Media-handling problems
ProblemCauseSolution
Poor print quality or toner
adhesionThe 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 curlThe 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 curlThe paper is too moist, has the wrong grain
direction, or is of short-grain constructionUse long-grain paper.
The paper varies from side-to-side.Turn the paper over.
Jamming, damage to paperThe paper has cutouts or perforations.Use paper that is free of cutouts or
perforations.
Problems with feedingThe 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.
Print is skewed (crooked).The media guides might be incorrectly
adjusted.Remove all media from the input tray,
straighten the stack, and then load the
media in the input tray again. Adjust the
media guides to the width and length of the
media that you are using and try printing
again.
More than one sheet feeds at one
time.The media tray might be overloaded.Remove some of the media from the tray.
See 
Load paper and print media
on page 35.
The media might be wrinkled, folded, or
damaged.Verify that the media is not wrinkled, folded,
or damaged. Try printing on media from a
new or different package.
The product does not pull media
from the media input tray.The product might be in manual feed mode.●If Manual appears on the product
control-panel display, press OK to print
the job.
●Verify that the product is not in manual
feed mode and print your job again.
The pickup roller might be dirty or damaged.Contact HP. See www.hp.com/support/
LJM1120 or the support flyer that came in
the product box.
The paper-length adjustment control in
tray 1 is set at a length that is greater than
the media size.Adjust the paper-length adjustment control
to the correct length.
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							Performance problems
ProblemCauseSolution
No copy came out.The input tray might be empty.Load media in the product. See Load paper
and print media on page 35 for more
information.
The original might have been loaded
incorrectly.On the flatbed scanner, place the original
document face-down with the upper-left
corner of the document at the corner of the
glass indicated by the icon on the scanner.
Copies are blank. The sealing tape might not have been
removed from the print cartridge.Remove the print cartridge from the product,
pull out the sealing tape, and reinstall the
print cartridge.
The original might have been loaded
incorrectly.On the flatbed scanner, make sure that the
original document is placed face-down with
the upper-left corner of the document at the
corner of the glass indicated by the icon on
the scanner.
The media might not meet
HP specifications.Use media that meets HP specifications.
The print cartridge might be defective.Replace the print cartridge. See Print
cartridge on page 73.
Copies are reduced in size.  The product settings might be set to reduce
the scanned image.On the control panel, press Reduce/
Enlarge and verify that it is set to
Original=100%.
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							Scan problems
Solve scanned-image problems
ProblemCauseSolution
The scanned image is of poor
quality.The original might be a second-generation
photo or picture.●To eliminate the patterns, try reducing
the size of the image after scanning.
●Print the scanned image to see if the
quality is better.
●Verify that the resolution settings are
correct for the type of scan job that you
are performing. See 
Scanner
resolution and color on page 64.
The image that appears on the screen might
not be an accurate representation of the
quality of the scan.●Try adjusting your computer monitor
settings to use more colors (or levels of
gray). Typically, you make this
adjustment by opening Display in
Windows Control Panel.
●Try adjusting the resolution settings in
the scanner software. See 
Scannerresolution and color on page 64.
The original might have been loaded
incorrectly.Verify that the original is loaded correctly on
the flatbed scanner. See 
Load paper and
print media on page 35.
The scanner might be dirty.Clean the scanner. See Clean the scanner
glass on page 65.
The graphics settings might not be suitable
for the type of scan job that you are
performing.Try changing the graphics settings. See
Scanner resolution and color on page 64.
Part of the image did not scan. The original might have been loaded
incorrectly.Verify that the original is loaded correctly on
the flatbed scanner. See 
Load originals forscanning on page 62.
A colored background might be causing
images in the foreground to blend into the
background.Try adjusting the settings before you scan
the original or enhancing the image after you
scan the original.
The original is too small.The minimum size that the flatbed scanner
supports is 25 x 25 mm (1 x 1 inch).
The media size is incorrect. In Scan settings, make sure that the input
media size is large enough for the document
that you are scanning. .
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