Question about Brother MFC 420CN All-In-One InkJet Printer

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Looking for a white ribbon cable

I have a customer that has a Brother 420 printer and needs the white ribbon cable that moves the printhead replaced. Can you tell me where I can find this part for purchase? Thanks a million. Have a good day.

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This is no sparepart and belongs to the printhead which is only sold in one part (Flat white cable, printhead and printhead cover).

Posted on Sep 11, 2007

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Posted on Jan 02, 2017

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We have been getting white horizontal lines on our documents. Both print heads were recently replaced and that did not solve the problem. What part is needing replaced?


I had this same problem and none of the printer services (clean printhead, align printer, calibrate linefeed) fixed the problem. After trying every solution that I found on the internet with no success I was able to fix the problem by cleaning two critical parts of the printer.
1. Turn off the printer and open it as though you are going to change the printheads.
2. Towards the back of the printer you will see a thin clear plastic ribbon that has very small black lines on it. Very, very, very gently clean this ribbon. I used a lint free cloth and some glass cleaner. Spray the cleaner on the cloth and slide the cloth against both sides of the ribbon. Do not pull on the ribbon. This ribbon is used to tell the printhead how far it has moved from side to side.
3. Next locate the silver bar that runs across the back of the printer. This bar is used to feed the paper through the printer as it is printing a document. On the left side of the bar you will see some plastic guides that hold the bar in place. On the outside of the plastic guides you should see a clear plastic disc made of the same material as the ribbon above. This disc also has very small black lines on it. Again very, very, very gently clean this plastic disc. This disk is used to tell the printheads how far it has travelled down the page. This is the one that was causing the problem. The dust or dried ink or whatever was on the disc was causing the printer to incorrectly calibrate the linefeed and was causing the white lines to appear on my documents.
4. Use the "calibrate linefeed" function of the printer services to recalibrate the linefeed and the white lines will hopefully be gone.

Jul 26, 2011 | HP Officejet Pro L7780 All-In-One InkJet...

2 Answers

935 Service Printhead error


Error 935
Printhead Error - Mirror motor unable to reach operation speed Check cables, look for chafing or damage to ribbon cable at sharp bends around rear cover. Replace printhead or ribbon cable.

May 27, 2011 | Lexmark E350d Laser Printer

1 Answer

Alarm flashing goes to prop


This is a "spacing alarm". check that the printhead moves freely from left to right. If not, remove the ribbon and try it again. If it is moving freely then it should be ok, if not it will need most likely the space motor or the main board replaced. In some cases it is also possibly the white carriage cable that runs from your main board to the space motor. Hope this helps.

Feb 22, 2011 | OKI MICROLINE 321 Turbo Matrix Printer

1 Answer

How can i relace the dmp printer head with new one


Hi,
  • 1-Turn off printer,

  • 2-Open the printer's front cover to access the printer's ribbon and printhead.
  • 3-Spray the ribbon and printhead with short sprays of air from a can of compressed air to remove any ink, dust and dirt buildup from the components.
  • 4-Use a flashlight to locate the printhead's adjustment lever. The lever is on the left side of the printhead.
  • 5-Push the lever toward the ribbon. This will place the printhead closer to the ribbon so the print will be darker.
  • 6-Close the printer's front cover. Turn on the printer.
  • 7-Print a test document. If the print is still too light, replace the ribbon.

    If the print is too dark, turn off the printer and move the printhead's adjustment lever slightly away from the ribbon.


  • Please Rate this solution. Regards.

    Nov 02, 2010 | Office Equipment & Supplies

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    Attempting to print labels from a Monarch 9855 printer and receiving error message: "Print Head error 768." Printer was working fine as of last Friday. We have other Monarch 9855 printers that are on other...


    the problem is your printhead is bad . do a print test by presing both arrow buttons at tah esame time for two seconds, look fo rthe line that reads bad dots. if the value i sgreater than 000 yu have a bad printhead
    jay

    Jun 08, 2009 | Monarch Paxar? 9855 Label Printer

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    BROTHER MFC 5840cn MACHINE ERROR 4F


    Downloaded service & repair manual for brother mfc 5840CW- my unit. Will follow repair directions to check the memory then replace required parts. Will be cheaper and faster than finding a repair shop and paying as much as the macine to fix it! Rip off prices for repairs today on units so they can get you to leave them and buy a new one. Then they fix the unit and sell it "refurbished"- not mine!
    Your information on clearing memory, the ink cleaning codes and taping the cartridge from over cleaning was good. Thanks for the help!

    Jul 24, 2008 | Brother DCP 115C All-In-One InkJet Printer

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    Ribbon Slips Off Okidata ML 395


    Your printhead is in correctly but not aligned, Please loosen the 2 screws that holds the printhead.Remove ribbon(all this while the printer is powered off) Now look on the right side there is a lever that makes the printer go closer to the ribbon ,move the lever to number 9 and move the head over to the left side of the printer.push the head forward slightly towards the black roller and tighten the 2 screws again ,install the ribbon and move the blue lever to 1 and try printing again.
    Hope this helps.Dezzi

    Oct 22, 2007 | Okidata 591 Printer

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    Brother DCP 115C


    Yes, another suggestion is to give it back to the dealer or a service partner which can be found on the homepage of brother. If the printer is 3 months old you are in guarantee time. Its a common problem with the printheads that one color (M or Y) is lost somehow sometime...! (Valveproblem within the printhead) You cant fix it yourself (May need a new printhead).

    Sep 27, 2007 | Brother DCP-110C All-In-One InkJet Printer

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    Okidata 320/420 printhead not printing aligned.


    Clean the large silver rod that runs through the carriage. It is dirty and not allowing the carriage to move as freely as it should. Ideally it should be left dry. Also change the ribbon. The same motor drives the carriage and the ribbon. If it has a bind, the same thing can happen. Hope it helps Ed

    May 18, 2007 | OKI MICROLINE 520 Matrix Printer

    1 Answer

    Oki 520 missing print


    You have replaced the item which is commonly the cause- the printhead. The other possible problems are: a connection break in the printhead ribbon cable, which makes electrical connection from the driver circuitry to the printhead. Look for a tiny crack, especially along the edge of this ribbon cable. Another possibility is an electronic component defect in the circuitry which fires the printhead, or maybe a loose solder connection in the same circuit. Lastly, when you replaced the printhead, are you reasonably certain the replacement head didn't have a broken top pin or two?

    Apr 10, 2007 | OKI MICROLINE 520 Matrix Printer

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