Question about Brother MFC-7820N All-In-One Laser Printer

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MFC 7820n 'close back door error' - Brother MFC-7820N All-In-One Laser Printer

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Hello Daysinn,

The "back cover open" message is usually caused by a paper jam inside the printer.
Follow these steps to rectify the problem.

1. Unplug the power to the printer.
2. Open the back and front cover.
3. Remove the drum and toner, this may be difficult because it may be stuck; don't be afraid to pull hard, you wont break anything.
4. Check for any foreign objects, most likely a peice of paper.
5. Reinstall the drum and toner.
6. Make sure to close the front and back covers.
7. Turn the power back on.

If the message stays after all this, there may be a sensor not working.

Thanks,

Pat

Posted on Mar 25, 2010

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Posted on Jan 02, 2017

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SOURCE: back cover open message on brother mfc 7820n

Had same problem. Closer inspection revealed bit of paper out of sight. Removed the toner cartridge and worked to free torn paper. Then restart. Hope it helps.

Posted on Feb 03, 2009

  • 1 Answer

SOURCE: MFC-7820N error message: back cover

There is a little black lever in the middle that needs to be re inserted properly. (like a little black stick in the middle.  Needs to slide to the left or right.   See more of this one the site.   It solved it for me.

Posted on Mar 13, 2009

copiersplusw
  • 136 Answers

SOURCE: Back door wont close

First Isolate whether it is the Side Door or their is a door on the rear make sure that isn't open.
What I would do is Physically open and re-close all doors again the tabs and sensor get sticky after awhile. If not you could have a BAD sensor door switch.


Posted on Sep 14, 2009

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1 Answer

It says close back cover?


Turn off your printer.
Open the back cover
Slam it shut - not hard enough to break it
Turn on printer
If you still have error, you most likely have a defective sensor for the back cover and will take a professional repair.

Apr 18, 2014 | Brother MFC-7820N Laser Printer

1 Answer

Brother MFC 7820N Toner life end with new toner


I found the following post on another site. It appears to work. If you want to reset your Brother MFC 7820N machine so you no longer have the error message: Toner End of Life, do the following:

1. Open the front cover of the 7820N, that is, the cover that allows you to pull out the toner and drum, but don't pull out the drum/toner.
2. Push the button: Options (located on the left of the control pad).
3. Type: *00 on the keypad.

The Brother MFC 7820N should be reset and the Toner End of Life message should disappear. WARNING: This may void your warranty and ultimately damage your machine if you are reusing or refilling your cartridges, but you should already know that. Hope this helps.

Sep 07, 2010 | Brother MFC-7820N Printer

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

1 Answer

Back door wont close


First Isolate whether it is the Side Door or their is a door on the rear make sure that isn't open.
What I would do is Physically open and re-close all doors again the tabs and sensor get sticky after awhile. If not you could have a BAD sensor door switch.


Sep 14, 2009 | Brother MFC-7820N Printer

1 Answer

Sudden toner outage


yes, error 74 points to toner empty. open front door, press "options" then "start" then "1" and "0". once shows accepted, close front door. make note of this as it very well may happen again.

hth,
razors

Mar 23, 2009 | Brother MFC-7820N All-In-One Laser Printer

1 Answer

Won't print; model 7820n; message: back door open, close back door; need help my brother 7820 continues to not print with the messgge :back door is open and it isnt. Also the printing keeps folding up...


first check and make sure that the back diir sensor is in place next if the paper is not going all the way in to the fuser section, you will have to remove the fuser and take it apart and remove paper in it, the paper is probally holding down the fuser sensor in side of it good luck brother sr, tech

Jan 18, 2009 | Brother MFC-7820N Printer

1 Answer

Back cover open message on brother mfc 7820n


Had same problem. Closer inspection revealed bit of paper out of sight. Removed the toner cartridge and worked to free torn paper. Then restart. Hope it helps.

Dec 15, 2008 | Brother MFC-7820N Printer

1 Answer

Back cover open message on brother mfc 7820n


http://www.fixya.com/support/t150137-one_more_person_back_cover_open_problem

Oct 24, 2008 | Brother MFC-7820N Printer

1 Answer

MFC-7820N error message: back cover open; close back cover. The back cover is closed but error message will not go away and I can not print. Thank you.


There is a little black lever in the middle that needs to be re inserted properly. (like a little black stick in the middle.  Needs to slide to the left or right.   See more of this one the site.   It solved it for me.

Jun 21, 2008 | Brother MFC-7820N All-In-One Laser Printer

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