Question about HP LaserJet 4200n Printer

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Dark blotches or patches in the printouts. Dirty roller?

What can I clean the rollers with? Can I clean the cartridge? Anything else?

By the way the printer is an HP4200n

Thank You

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Cleaning your rollers will not solve your image problem. Either you have a bad or poorly remanufactured cartridge, or your fuser is bad.

NO TOOLS are necessary to replace the fusing assembly, it is idiot proof---very easy to do. But more expensive than a toner cartridge so try that FIRST.

Posted on Mar 13, 2009

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Hi
use a high pressure air compressor to blow the  printer clean then clean all the rollers with benzene and be sure to replace the toner tranfer roller if it is white, its situated under the cartridge . its a foam roller

Posted on Jan 10, 2009

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1 Answer

Sharp Al1655cs copier black smudge down center of page about as wide as a pencil


Hi


Sounds like a fusing error . If your able to wipe the toner off the page its a fuser unit problem (replace fuser unit).

Also clean the copier's paper rollers. Marks on copies will occasionally be the result of a dirty paper-rolling mechanism. Simply access these rollers (your photocopier will likely have a plaque or series of signs indicating the locations of these areas) and wipe them off.

Clean the copier bed's glass plate. One of the most common causes of blemishes in photocopies is a dirty glass plate. In some cases a permanent mark, such as a scratch, will be present on the plate, showing up in every copy as a dark line or spot. However, most problems attributed to the glass plate can be fixed by wiping the plate with a soft towel and common household glass cleaner.

Clear any excess toner that has spilled or overflowed in the toner cartridge chamber. Excess toner will almost always result in blemishes on your copies. The most effective means of cleanup is to remove the toner cartridge and set it aside, thoroughly cleaning up any spilled toner in the compartment before putting the cartridge back in place.

Check for low toner levels. Low toner levels can actually contribute to unsightly lines and blotches on a photocopy. Most photocopiers will automatically indicate the need to replace an empty or low toner cartridge; while the toner is low, these models will permit continued copying. Consult your photocopier's instruction manual or key to warning lights and indicators for how to tell if the toner is low or empty.

Aug 03, 2011 | Office Equipment & Supplies

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Black lines on copies and on drum


There are a few things you can do to troubleshoot this problem.
  1. Be sure you are using new, clean paper
  2. Clean the copier's paper rollers, the marks may result from a dirty roller mechanism.
  3. Clean the copier bed's glass plate, smudges manifest themselves in the final copies.
  4. Clear any excess toner that has spilled in the toner cartridge chamber. Remove the cartridge, set it aside, then clean the compartment.
  5. Check for low toner levels. Low toner levels can actually contribute to unsightly lines and blotches on a photocopy
If all else fails, try turning down the darkness of the copies in the settings, this can occasionally lead to lines and marks.

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I have an Samsung ML-2851ND printer and it is printing grey patches vertically down the pages behind the text. What is causing this and how can it be resolved?


Hi,
Dots, Lines and smudges on the printouts are due to dirty/ deteriorating cartridge and cleaning the green drum of the cartridge may help temporarily. Open the front cover and take out the cartridge and gently clean the roller/ green drum with a dry, soft, lint-free cloth wiping off the toner dots marks/ lines.
Also, make sure that the visible inside of the printer is clean and ther is no spilled toner inside, which sometimes results in dots.
Try to rotate the drum to clean its whole face. You may have to repeat cleaning more than once.
Let me know if any further clarification/ assistance is required.

Hope it helps! Good Luck!
Dont forget to appreciate the solution and to convey your feedback
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I am getting lines down the middle and blotches on the other two sides of the page up and down. I have ordered a new refurbished cartridge and some cleaning paper to try this first. If this does not work...


may be it caused by your printer roller not work properly, try to clean roller, if not work check the roller, case off printer and see the roller may be the roller gear ware not work properly and caused noise

Jan 11, 2011 | HP LaserJet 1320 Printer

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Striped line down right hand side of printout


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Dec 02, 2008 | Samsung CLP 300 Laser Printer

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Cartridge dumping toner? dark copies.


Check the drum- if there is any lines or ghost images replace it if not its problem with fixing unit.

Be sure that you cleaned your copy glass.

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Canon LBP 2410 Lazer Colour Printer -


Printing not dark enough or varied in darkness
If the print is a dismal gray rather than a sharp black, you are probably almost out of toner. This can manifest itself evenly across the entire page or in splotches or stripes, depending on the printer.

Sometimes you can wring a little bit more out of a toner cartridge by taking it out and gently shaking it from side to side (never up and down, as toner can spill out). You can also try turning up the printer’s contrast adjustment, if it has such a knob (usually on the back side if it exists). Faded print can also result from a dirty corona wire, because a dirty wire inhibits a full electrical charge from being passed.

If the printouts are consistently varied in density, and you have to frequently remove the toner cartridge and shake it to redistribute the toner inside it, make sure the printer is sitting on an even, flat surface.

Horizontal black lines
A horizontal black line on the printout is probably the result of a dirty or damaged roller. There are lots of rollers in the printer, and you can use the space between the lines on the page to determine which roller is causing the problem. Measure the distance between the errant black lines on the page and then use Table A to determine which part might be causing the problem. Table A
Distance between lines
Faulty part
0.5”
Registration assembly
1.5”
Upper registration roller
1.75”
Lower registration roller
2.0”
Toner cartridge developer roller
2.56”
Lower fusing assembly roller
3.16”
Upper fusing assembly roller
3.75”
Toner cartridge photo drum

Regularly spaced splotches
If there are evenly spaced black spots but they don’t extend all the way across the page, the problem is probably a scratch or flaw in the drum or a build-up of toner on the fusing roller. If the spots are less than three inches apart vertically, it’s probably the drum, because the drum has a larger diameter than the fusing roller.

Vertical black line on edge of page
This can indicate an almost empty or faulty toner cartridge or (less frequently) some spilled toner inside the printer.

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