Question about HP LaserJet 4250dtn Printer

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Printing vertical grayish black ink on the left and right side of page

The pages are coming out of the printer with grayish black smudges about and inch wide on the right and left side of the page. We have taken the toner out looked inside and cannot find any dripping ink. The toner is only 3 or 4 months old. What can we do to get this stuff off our pages?

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Replace the toner cartridge, you wont have anything "dripping" out of it as the toner inside is a powder. if it still appears replace the fuser.

Posted on Oct 29, 2008

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The problem is with the printer head which is normal in Laser Printers. Try cleaning the printer head with a cotton cloth and it'll resolve the problem a very large extent.

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My dcp165c printer print quality prints black & yellow colour. i clean print head through maintance 76 but problem cannot be solved


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When I print, the pages are smudged with ink. What should I do?
Description:
- If smudged stains appear at the top center of the printed page:
  • Make sure the paper is not too thick or curled.
    Also, verify that the appropriate paper is being used and that the paper type set in the machine matches the media used.
  • Make sure the paper is not curled when you print on the back side of the paper with the Print Odd Pages and Print Even Pages settings.

- If smudged stains appear at the right or left corner of the printed page:
  • Make sure the paper is not curled when you print on the back side of the paper with the Print Odd Pages and Print Even Pages settings.

- If smudged stains appear on the reverse side or at the bottom of the page:
NOTE: Illustrations shown below are from the representative product and may differ from your Brother machine.
  • Make sure the printer platen is not dirty with ink.

    How to clean the machine's printer platen

    1. Unplug the machine from the AC power outlet.
    2. Lift the scanner cover until it locks securely in the open position.
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      platen1.gif
    4. Close the scanner cover.

  • Make sure you are using Genuine Brother Innobella™ Ink.
    > Brother Genuine Supplies information


  • Make sure you are using the paper support flap.

    To use the paper support flap, pull out the paper support (1) until it clicks and unfold the paper support flap(2).

    flap1.gif

Aug 03, 2010 | Brother Computers & Internet

1 Answer

When printing on ML4550B, there is a ~1cm intermittent black patches vertically on the right side of the printed page.


This is possibly toner on the paper feed rollers. If you happend to use refurbished cartridges they are often over filled to claim more pages for your buck. But they fail to say expect smudges down the printed page.
use a cloth and some metho to clean the paper path

Please rate my help++++Thanks for using FIXYA

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I changed the black ink cartridge and the printer


Calibrate your new blank ink cartridge, have some nozzle check, cleaning check, and printer alignment. This are procedure that new ink cartridge will have to calibrate before you use. Epson printer are very sensitive when capable of changing ink cartridge. Unlink HP directly work without any print test because the cartridge head and ink join together, Epson with ink cartridge and the head separate.
Have some test on it at Printer Maintenance.
I'm sure 100% works on it.
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1 Answer

4 - black ink smudges (1/32" wide x 1/16" high) in right margin


Very nice trouble shooting. The image defect you describe point to the OPC or drum unit this is essentially the toner cart. In your case black. Measureing the distance between repetitive defects is a sure way of diagnosing problems such as yours. Again nice work.

Google repetitive defect ruler for your model to help in the future.

Hope this helps

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change ink cartdidge then try. check also paper jam.
if still problem then change ink cartridge then check.

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If it is approx 3-4 smudges down the page. Replace the drum cartridge.

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- Try to reallign the cartridge, run a print test, after that if the issue still persist - uninstall and reinstall software - run test and re-allign again the cardtridge using software. run print test again.

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