Question about Brother MFC 7420 All-In-One Laser Printer

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Machine says back cover open and opening the cover then closing it does not fix it I have a dhcp 720

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There is a sensor lever on the black guide that goes into a sensor on the right as you face the back. This guide is closed by the back door. If that lever is out of place it will always say back door open.

Posted on Jul 23, 2009

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Unable to print 70


  1. Open the Outer Back(Rear) Cover (1) at the back of the machine. Pull the jammed paper out of the machine.

    jam03.gifjam04.gif
  2. Close the Inner Back(Rear) Cover (1) if it is open as shown in the illustration.

    jam06.gif
  3. Close the Outer Back(Rear) Cover. Make sure the cover is closed properly.
    jam07.gif
  4. Pull the paper trays (1) out of the machine.

    jam01.gif
  5. Push the two green levers up on both sides.

    greenlever.gif
  6. Pull out the jammed paper (1) and press Stop/Exit.

    jam02.gif
  7. Push the green duplex unit up.

    greenduplex.gif
  8. Reset the machine by lifting the scanner cover from the front of the machine and then closing it.
    If you cannot remove the jammed paper from the front of the machine, or the error message still appears on the LCD after you have removed the jammed paper, please go to the next step.

  9. Using both hands, use the plastic tabs on both sides of the machine to lift the Scanner Cover (1) into the open position. Make sure that there is no jammed paper left in the corners of the machine under the plastic covers.
    jam08.gif

    Note
    • If ink gets on your skin or clothing immediately wash it off with soap or detergent.

    • If the paper is jammed under the print head, unplug the machine from the power source, and then move the print head to take out the paper.

    • If the print head has stopped in the right corner as shown in the illustration, you cannot move the print head. Press Stop/Exit until the print head moves to the middle. Then unplug the machine from the power source, and take out the paper.

    jam09.gif
    1. Gently close the scanner cover using the finger holds on both sides of it as you push down on the Scanner Cover Support (1).
      jam096.gif
    Caution Be careful not to trap your fingers under the scanner cover. Always use the finger holds provided on both sides of the scanner cover when opening and closing it.

    1. Push paper tray #1 and paper tray #2 firmly back into the machine.

    Note Make sure you pull out the paper support until it clicks.

    jam11.gif

Nov 11, 2011 | Brother MFC-6890CDW Printer

1 Answer

Back cover open message although cover is closed


Open the top and back covers. If you see any jammed paper or
other item, gently pull it out, then close the covers. If the error message
remains, open and close the covers again. If the FAX/MFC cannot reset
itself and return to the date and time prompt, it will display MACHINE
ERROR XX. Please call Brother Customer Service
and tell them the Machine Error number at:
In USA:
1-800-284-4329
In Canada:
1-800-853-6660
In Montreal:
1-514-685-6464

Jan 15, 2011 | Brother IntelliFax-2820 Laser Fax

4 Answers

I had a paper jam and I had opened back cover to clear it. Now when I close it still says Back cover open. Close the back cover. What should I do? There is a black color flap inside the main back cover...


Just fixed the same problem. My solution was as follows: When you open the back cover there is another plastic flap/cover inside that drops. Across this 2nd cover there is a plastic rod running parallel with a plastic finger that sticks up perpendicular to the rod which I believe guides the paper into the roller.

On my machine this rod came out of line, placing it about a quarter inch to the left which affected the sensor and the guide. If you look closely, you will notice a small groove on the rod that needs to be in a specfic slot on the 2nd cover. Good luck

Jun 08, 2010 | Brother MFC-7820N Printer

1 Answer

Back Cover Open Close The Back Cover Is Message I'm getting. What is the Problem?


Open the front cover and remove the drum and toner(cartridge).

There should be a paperjam in the machine. It reads back cover open because the piece of paper is covering the sensor for the back cover.

May 31, 2010 | Brother IntelliFax-2820 Laser Fax

1 Answer

It says close back cover but back cover is already closed


Open the front cover and remove the drum and toner(cartridge) There should be a paperjam in the machine. It reads back cover open because the piece of paper is covering the sensor for the back cover.

Apr 19, 2010 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Fax display says, close back cover even with back cover closed.


Open the front cover and remove the drum and toner(cartridge) There should be a paperjam in the machine. It reads back cover open because the piece of paper is covering the sensor for the back cover.

Apr 15, 2010 | Brother IntelliFax-2820 Laser Fax

1 Answer

Brother (photocopier, fax and scanner machine) says << back cover open. close back cover>> but the back cover (or at least what i think is the back cover) is closed. I even opened and closed it...


I have fixed this problem on my 7820n printer by brother.

open the back door, then inside there will be a black colored other kind of like door that pulls back away from the roller. on this inner door is a black long thin plastic lever that runs from about the center of the inner door to the right. on the right end of it is a lever that slides along a curved increase on the right side wall. when both doors are closed this right end of the rod or lever moves up to close the gap between what is the sensor. this long thin plastic rod had snapped out of place and when i snapped it back in making sure the spring was correctly installed on the left end of it and the middle part of the rod slid correctly in its groove...the right end of the lever correctly closed the gap on the sensor (when both doors are closed) and the back door open error went away.

So that's how you really fix it!!!!

James Hilliard - Totally super awesome guy! hee hee

Oct 27, 2009 | Brother MFC-7820N Printer

2 Answers

Brother MFC-7220 says close back cover but it's already closed


Open the front cover and remove the drum and toner(cartridge) There should be a paperjam in the machine. It reads back cover open because the piece of paper is covering the sensor for the back cover.

May 13, 2009 | Brother IntelliFax-2820 Laser Fax

2 Answers

Document jam


I had this totally annoying problem this morning. After looking for any obvious paper jams or small bits of loose paper, I tried several fixes: 1) open front cover, release levers that hold white rollbar in place, roll the bar forward to make sure nothing is stuck behind it, snap levers back in place; DID NOT fix the problem; 2) open top cover, remove print cartridge, look for jammed paper bits, close cover; DID NOT fix the problem; 3) unplug the machine, wait a few minutes, turn machine back on; DID NOT fix the problem. I even unplugged the machine, opened ALL the covers, turned the machine upside down and shake it to see if any paper clips, staples, or other objects have fallen inside the machine; DID NOT fix the problem. FINALLY, I pulled the paper feed tray forward, reached down to the feed rollers, twisted them a few turns, put paper back in the machine, and the "paper jam" message disappeared! This may not work for everyone, but it worked for me today, so I hope this helps someone out there to have a better day.

Oct 25, 2008 | Brother IntelliFAX 1270E Plain Paper Fax

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