Question about Brother MFC-8840D All-In-One Laser Printer

1 Answer

Hinge and paperfeed

The rear L.H.S hinge has broken . Also when it tries to print, it makes a load "grinding" sound followed by jamming the paper. When I remove the toner, the paper is concertina-ed. Any assistance is appreciated.

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  • 4 more comments 
  • etcetc914 Jul 28, 2009

    Thanks for your response.. it is appreciated
    What is the fuser's part number; or can the gear be repaired? Is it worth repairing?

  • etcetc914 Aug 25, 2009

    OK I have now replaced the gear and the hinge. The grinding noise is gone. When trying to figure out how to get to it, we removed the sides, PCB etc. etc [I now know that this was unnecessary]. Problem is I now get the "PLS open cover" error message. If I open, and remove the cartridge etc, replace, I still get the error message. I found a manual which told me to go to "maintenance" menu :- MENU,*,2,8,6,4. Unfortunately when I press * I get double beeps, indicating it is not accepting it. Please advise. I suspect once in maintenance mode, I need to enter 8,2 to get the actual error. Your assistance is appreciated

  • etcetc914 Aug 25, 2009

    Seems that your comment was incomplete... Please advise

  • etcetc914 Aug 27, 2009

    I really appreciate your responses!!!. When I enter the code, it tries to go to the menu; ie It double beeps on what it considers to be wrong [eg '*'] and accepts those digits which it considers valid.. the result, I end up in the menu somewhere, not in Maintainence Mode. [even though I enter the digits in less than 2 secs]. I have tried it numerous times, without success. I wonder whether being in Australia, there is different firmware and a different code.

  • etcetc914 Aug 29, 2009

    I finally managed to get it into Maintainence Mode. The machine had the "PLS Open Cover" error message, and whilst that was there, it would not enter the mode. However, if I opened the cover, I could get it into the mode, by entering the code. Of course, the error code as a result of the "82" was "A1" [front cover opened] so, what I did, was to leave it in maintenance mode, and close the cover and entered "82" again and got "Machine Error 72" which is "cannot detect Beam detect signal" ..check scanner motor; check MP tray open sensor. Is this error likely due to the removal of the fuser, or is it from when we incorrectly went around the machine, pulling it apart, trying to figure how to get the fuser out?

  • etcetc914 Sep 01, 2009

    All working!!!!! Thanks!!! The error was caused by a small flat ribbon cable be inserted upside down/back to front.... THANKS HEAPS!!!!!!!!!



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You need a new hinge, #LP2403001, and the grinding is because the fuser has a broken gear.

Posted on Jul 27, 2009

Testimonial: "Excellent.... the greatest!!!"

  • 4 more comments 
  • Craig Gillette
    Craig Gillette Jul 28, 2009

    The gear is #LJ7416001 about $3.00

  • Craig Gillette
    Craig Gillette Aug 25, 2009

    You just have to ignore the beeps while entering service mode, sometimes it takes several tries, make sure you start from the main menu each time, and when the lights start flashing, you're in...

  • Craig Gillette
    Craig Gillette Aug 25, 2009

    There is a sensor flag on the fuser that has to be free, and pass thru the right side to a sensor, that one can give you fits...

  • Craig Gillette
    Craig Gillette Aug 26, 2009

    You have the right info for maint mode and 82..just ignore the beeps while entering the menu * 2 8 6 4, and also check the sensor arm that is mounted on the fuser, and make sure that it enters the side of the printer without rubbing on the frame and when you actuate it manually it is free to move thru the sensor.

  • Craig Gillette
    Craig Gillette Aug 28, 2009

    After each try, you have to press the stop key and try again, ignore the beeps and display and just hit the keys in order...Brother assures me you don't have a different code, even after entering the codes give it a few seconds and no matter what the display says if the fax, copy and scan lights are blinking you're in the maint. mode...

  • Craig Gillette
    Craig Gillette Aug 29, 2009

    Probably not the fuser, but going around the machine, on the left side there is a lever that opens the laser shutter, sounds like it somehow got out of position, it connects to that front cover to make sure no laser light can come out when the cover is open. The laser is directly over the drum assembly and the lever is at the top left of the door, with the left cover off you can see all the things actuated by the front door.



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