HP LaserJet 2430N

How to Identify and Fix Common Problems ?

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What`s happening is that the drum or rollers could have a fingerprint or dirt that is smudging the toner on the page as it passes through to the fuser. It is normally caused by the rollers. If the marks are always in different places, then it`s most likely to be the drum.
Dots are typically caused by foreign material inside the machine (for example paper dust, glue from labels or envelopes, paper clips, staples) sticking to or damaging the surface of the drum. Toner builds up on or sticks to these areas on the drum and creates black dots on the printed pages.
The streaks or lines might be caused due to low ink levels in one or both ink cartridges. Check the ink levels using the HP Toolbox to determine if the ink cartridges are low on ink and need to be replaced. note: Ink level warnings and indicators provide estimates for planning purposes only.
A printer printing lines on the page are normally caused by a blocked, dirty, or damaged print head. Blocked ink cartridge nozzles, or not removing protective seals correctly when you installed a new ink cartridge can also cause missing lines of print.
Black lines and smudges on your document may indicate that your printer is dirty. Dirt, dust, or toner accumulated on the rollers or transfer belt can cause smears and smudges on the paper as it goes through the paper.
The best way to prevent smearing is to make sure you give the ink time to dry before picking up the copy or copies. It doesn`t take long, maybe 10-15 seconds. If that doesn`t work, try changing your printer settings for a lower quality print job. You generally have a choice, Best, Normal or Draft.
When your printer leaves black lines, the lines indicate that there are excess toner powders on the rollers or transfer belt within the printer. As the paper is moved along by the rollers and transfer belt, any excess powder left on them can result in lines being left on the paper.
Smears that appear in addition to otherwise well-formed output may signal toner contamination inside your LaserJet, either from a leaky cartridge or from improperly fused sheets that leave toner residue behind. Smears at the edge of the sheet that enters the printer first point to dirty paper guides.
White lines will typically start appearing on your print outs due to a clogged up printer head. Your first port of call when solving this problem is to run the cleaning program on your printer, which should be accessible through its settings menu.
After printing, trim the page down to its intended size. For instance, to achieve a full bleed 11×17, run the job on 12×18 paper, add an extra half inch all around your design (11.5 x 17.5) and trim the edges with a paper cutter such as an MBM Triumph 4315 or 5255.
A printing defect characterized by elongated blotches of ink in non-image areas, commonly caused by mechanical problems with the press, such as damaged rollers (in lithography), or by improper wiping of a gravure cylinder by the doctor blade (due to dried ink fragments attached to it, or other such problems).
Fortunately, you can remove roller marks by using a wet sponge and some sandpaper. Once your paint has dried off, rub down the surface using your sandpaper. Be sure not to get rid of too much of the paint because the only goal is to even out the coating.
You can see they are sharp `cogs` of sorts, which lightly touch the frosting sheet as it prints. The marks are formed when the drying printer ink transfers onto the pin feeds, and back onto the white icing sheet.
The printer is either low in toner, the density is set too low, or the Economode may be turned on. Remove the toner cartridge and shake it. This will redistribute the toner and often will temporarily solve the problem. However, this usually indicates it is time to install a new cartridge.
The best way to prevent smearing is to make sure you give the ink time to dry before picking up the copy or copies. It doesn`t take long, maybe 10-15 seconds. If that doesn`t work, try changing your printer settings for a lower quality print job. You generally have a choice, Best, Normal or Draft.
More Tips to Prevent Laser Cut Burn Marks

Add furniture polish before cutting and to wipe off light soot stains. Use mineral spirits to clean slightly discolored acrylic or wood. Adjust the frequency or PPI of your laser cutter. Play with the cut speed.

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