HP LaserJet M1120 User Manual

							Critical error messages
Critical error messages can indicate some kind of failure. Turning off and then turning on the power
might fix the problem. If a critical error persists, the product might require service.
Critical error message-tables
Control panel messageDescriptionRecommended action
50.1 Fuser Error
Turn off then onThe product has experienced an internal
hardware error.1.Turn off the power by using the power
switch, and then wait at least 30
seconds.
2.If a surge protector is being used,
remove it. Plug the product directly into
the wall socket.
3.Turn on the power and wait for the
product to initialize.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.2 Fuser Error
Turn off then onThe product has experienced an internal
hardware error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.3 Fuser Error
Turn off then onThe product has experienced an internal
hardware error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.8 Fuser Error
Turn off then onThe product has experienced an internal
hardware error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
50.9 Fuser Error
Turn off then onThe product has experienced an internal
hardware error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
ENWWControl-panel messages 81
 
						

							Control panel messageDescriptionRecommended action
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
52 Scanner Error
Turn off then onThe product has experienced a scanner
error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
54.1C Error
Turn off then onThe product has experienced an internal
hardware error.Turn off the power by using the power switch,
wait at least 30 seconds, and then turn on the
power and wait for the product to initialize.
If a surge protector is being used, remove it.
Plug the product directly into the wall socket.
Use the power switch to turn the product on.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
Engine comm. ErrorThe product has experienced an internal
hardware error.1.Turn off the power by using the power
switch, and then wait at least 30
seconds.
2.If a surge protector is being used,
remove it. Plug the product directly into
the wall socket.
3.Turn on the power and wait for the
product to initialize.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
82 Chapter 11   Problem solve ENWW
 
						

							Control-panel display problems
CAUTION:Static electricity can cause unexpected black lines or dots to appear on the product control-
panel display. Do not touch the product control-panel display if there is a chance that you have collected
a static electric charge (for example, by walking on carpet in a low-humidity environment).
Unexpected lines or dots might appear on the product control-panel display, or the display might become
blank if the product is exposed to an electric or magnetic field. To resolve this problem, perform the
following procedure:
1.Turn the product off.
2.Remove the product from the electric or magnetic field.
3.Turn the product on again.
Clear jams
Causes of jams
Occasionally, paper or other print media can become jammed during a print job. Some causes include
the following events:
●The input trays are loaded improperly or overfilled, or the media guides are not set properly.
●Media is added to or removed from an input tray during a print job or an input tray is removed from
the product during a print job.
●The cartridge door is opened during a print job.
●Too many sheets have accumulated in an output area, or sheets are blocking an output area.
●The print media that is being used does not meet HP specifications.
●The media is damaged or has foreign objects attached to it, such as staples or paper clips.
●The environment in which the print media was stored is too humid or too dry.
ENWW Control-panel display problems 83
 
						

							Where to look for jams
Jams can occur in these locations:
●In input areas
●In output areas
●In the print-cartridge area
Find and remove the jam by using the instructions on the following pages. If the location of the jam is
not obvious, first look inside the product.
Loose toner might remain in the product after a jam. This problem typically resolves itself after a few
sheets have been printed.
Clear jams from the input-tray areas
CAUTION:Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
When removing jammed media, pull the jammed media straight away from the product. Pulling jammed
media out of the product at an angle can damage the product.
NOTE:Depending on where the jam is located, some of the following steps might not be necessary.
1.Open the print-cartridge door.
2.Grasp the handle on the print cartridge, and then pull the cartridge straight out to remove it.
84 Chapter 11   Problem solve ENWW
 
						

							3.With both hands, grasp the side of the media that is most visible (this includes the middle), and
carefully pull it free from the product.
4.Open tray 1 and remove the media stack.
5.With both hands, grasp the side of the jammed media that is most visible (this includes the middle),
and carefully pull it free from the product.
ENWWClear jams 85
 
						

							6.Replace the print cartridge and close the print-cartridge door.
86 Chapter 11   Problem solve ENWW
 
						

							Clear jams from the output bin
CAUTION:Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
With both hands, grasp the side of the jammed media that is most visible (this includes the middle), and
carefully pull it free from the product.
ENWWClear jams 87
 
						

							Clear jams from the print-cartridge area
CAUTION:Do not use sharp objects, such as tweezers or needle-nose pliers, to remove jams.
Damage caused by sharp objects will not be covered by the warranty.
When removing jammed media, pull the jammed media straight away from the product. Pulling jammed
media out of the product at an angle can damage the product.
1.Open the print-cartridge door, and remove the print cartridge.
CAUTION:To prevent damage to the print cartridge, minimize its exposure to direct light.
2.With both hands, grasp the side of the jammed media that is most visible (this includes the middle),
and carefully pull it free from the product.
3.Replace the print cartridge and close the print-cartridge door.
88 Chapter 11   Problem solve ENWW
 
						

							Avoid repeated jams 
●Verify that the input tray is not overfilled. The input tray capacity varies depending on the type of
print media that you are using.
●Verify that the media guides are properly adjusted.
●Check that the input tray is securely in place.
●Do not add print media into the input tray while the product is printing.
●Use only HP-recommended media types and sizes.
●Do not fan media prior to loading it in a tray. To loosen the ream, hold it firmly in both hands and
twist the media by rotating your hands in the opposite direction.
●Do not let print media stack up in the output bin. The print media type and the amount of toner used
affect the output bin capacity.
●Check the power connection. Make sure that the power cord is firmly connected to both the product
and the power supply box. Plug the power cord into a grounded power outlet.
ENWWClear jams 89
 
						

							Solve image-quality problems
Print problems
Print quality problems
Occasionally, you might encounter problems with print quality. The information in the following sections
helps you identify and resolve these issues.
General print-quality issues
The following examples depict letter-size paper that has passed through the product short-edge-first.
These examples illustrate problems that would affect all of the pages that you print. The topics that follow
list the typical cause and solution for each of these examples.
ProblemCauseSolution
Print is light or faded.The media might not meet HP specifications.Use media that meets HP specifications.
The print cartridge might be defective. If you
use a non-HP print cartridge, no messages
appear on the product control panel.Replace the print cartridge. See Print
cartridge on page 73.
If the print cartridge is not low or empty,
inspect the toner roller to see if the roller is
damaged. If it is, replace the print cartridge.
If the whole page is light, the print density
adjustment is too light or EconoMode might
be turned on.Adjust the print density, and disable
EconoMode in the product Properties.
Toner specks appear.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.
Dropouts appear.A single sheet of print media might be
defective.Try reprinting the job.
The moisture content of the paper is uneven
or the paper has moist spots on its surface.Try different paper, such as high-quality
paper that is intended for laser printers.
The paper lot is flawed. The manufacturing
processes can cause some areas to reject
toner.
The print cartridge might be defective.Replace the print cartridge. See Print
cartridge on page 73.
If the error persists, contact HP. See
www.hp.com/support/LJM1120 or the
support flyer that came in the product box.
Vertical streaks or bands appear
on the page.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.
90 Chapter 11   Problem solve ENWW