Question about Brother MFC-8440 All-In-One Laser Printer

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Pls Clean Drum

I purchased a Brother MFC-8440 second hand and I get an error message that says Clean the corona wire of the drum. What's a corona wire and where is the drum.

Thanks for the help.


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  • eappraisal Dec 10, 2008

    I have this problem too and I have done slid the blue tab a gazillion times to no avail. I did some troubleshooting and manually rolled the mechanism inside and used a cotton swab to remove dust, etc. This worked for about 5 printed pages and then no longer prints with the same message. I checked the drum life and it says 100% ? ? The unit is original, about 4 years old, and I was thinking the drum unit needed replaced but don't want to do it if I don't have to. ANY help would be soooo appreciated!! Thanks!

  • Anonymous Mar 12, 2014

    Replaced drum and printer now printing too lightly - not legible - have tried a new cartridge, have tried darkening contrast, have cleaned the corona wire, there are no other errors on machine, any other suggestions



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The drum is the larger plastic unit that slides out an the toner cartridge fits into it. The corona wire is the very fine wire at the front top of the drum. Just slide the little cleaning tab back and forth.

Posted on Aug 03, 2008


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MFC 7340 - I changed the toner cartridge, and cleaned the corona wire as instructed. When I put the drum unit back in, I get the message "Open front cover clean corona wire". I clean the corona...

The drum unit may be at it's end. There is a report you can print that will say "Drum" life at the bottom of the page. I think it's the "User Settings" or something. Though it sounds like you can't print to find this out anyway....Do you recall how many times you've changed the toner without changing the drum? Usually you can expect about 4-5 toners on every drum. Once the drum's photo sensitive coating wears off it is incapable of charging correctly to print. Might just be time for regular maintenance. with questions.

Oct 29, 2010 | Brother MFC-7340 All-In-One Laser Printer

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My brother mfc-7840w printer keeps telling saying there is a drum error and will not print. i clean the corona wire and reset everything yet the same thing happens again and again. how do i fix this?

The drum is the photosensitive roller that the image is charged onto so I'm afraid cleaning the corona wire won't help. If the drum is removeable try reseating it, otherwise it looks like you may need to buy a new drum kit for it.

Apr 28, 2010 | Brother MFC 7840W Printer

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Drum Error on Brother MFC 7840W

Has two situations:
  1. The corona wire on the drum unit needs to be cleaned.Clean the corona wire on the drum unit.
  2. The drum unit has reached the end of its life. Replace the drum unit.

Feb 15, 2010 | Brother MFC 7840W Printer

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Commonly caused by High voltage discharge or arcing from a dirty primary charger corona and grid.

You need to clean your drum unit.

Open the front door and pull out the Drum unit.

Look on top of it for a small (usually) blue slider, sitting in a 10mm slot that runs the length of the Drum unit. This is the corona cleaner.

Slide this back and forth about 6 times, ensuring you return it to the original starting position.

Reinstall the Drum unit and try printing.....

Dec 21, 2009 | Brother MFC-7340 All-In-One Laser Printer

2 Answers

How do we clean the drum

from the brother website...
Description of Problem 100000015035
How do I clear the message PLS CLEAN DRUM from the display?

Description of Solution 200000019400
Dust or toner on the corona wire may cause this error message to appear on the display. To clean the corona wire, follow the instructions listedbelow.
NOTE: Brother strongly recommends that customers do not use generic drumunits and/or toner cartridges, or refill their Brother toner cartridge. Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations. Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability. The Brotherlimited warranty does not apply to any problem that is caused by the useof unauthorized third party drum units, toner cartridges or toner.
1. Open the front cover (below the paper ejection tray) by pulling the taps on the left and right side of the unit towards you.
2. Lift the drum unit slightly and pull it out.
3. Place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering the toner.
4. Clean the corona wire inside the drum by gently sliding the blue tap (located on the top left side of the drum unit) from side to side 7 or 8
5. Return the tab to the home position (left side of drum). It should click into place. NOTE: If the tab is not at the Home position, printedpages may have vertical stripes.
6. Reinstall the drum unit.
7. Close the front cover, pressing firmly on each side until the cover clicks into place.

Oct 12, 2009 | Brother MFC-8840D All-In-One Laser Printer

1 Answer

I have a Brother mfc-8440. It prints light on the

Usually when it prints light on one side and normal on the other, it's either the drum (which you replaced) a dirty corona wire, or the toner is unevenly distributed in the cartridge. You can removed the toner cartridge and gently drop it from a distance of about 4-5 inches to dislodge any caked up toner. This is normal in a cartridge that has sat a while or if the fax machine is in a room with high humidity.
Hope this answers your question and best of luck.

Aug 02, 2009 | Office Equipment & Supplies

2 Answers

Same problem even with new Brother drum

Did you replace the drum or the toner cart? The drum has a blue lever that you slide back and forth around 20 times to clean the corona wire. I sometimes use a cotton swab with alcohol to gently clean this wire as well.

Jun 23, 2009 | Brother MFC 8500 All-In-One Laser Printer

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Drum error

Yes, you should replace the drum unit if you have not done so. You may have a broken corona wire or drum. However, keep in mind that you will need to reset your machine after changing the drum unit. If after replacing, you still get the same error, you may have a problem with your machine properly sensing your drum unit.

Jan 03, 2009 | Brother IntelliFax-2820 Laser Fax

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