Question about Brother MFC 7840W Printer

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I have a message that says clean the corona wire of drum. Where do I find that item.

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Posted on Jan 02, 2017

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SOURCE: Pls Clean Drum

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

  • 1447 Answers

SOURCE: Brother DCP 7020 Keeps giving me the "Drum Error" Message

Dear sir you see properly drum unite has a drum image sensor its demage so you change your copier drum unite, thanks.

Posted on Nov 22, 2009

  • 231 Answers

SOURCE: How do i clean the drum unit corona wire

Open the front door and remove the Drum unit.

On the top of the drum unit, to one side, you should see a small blue knob, mounted into a slot. This is the Corona cleaner.
Slide it back and forth a few times, and make sure you return it to the original position.
That's it.
Put it back together and try it out.
Good luck.

Posted on Dec 07, 2009

  • 1 Answer

SOURCE: drum error keeps popping up, cleaned the corona

Hi, Sorry my english is poor, but i will try: you have to say to your machine that you change the drum, open the front end, and pull out the drum , and insert it, but before you close the front end, push the clear/back button, and answer yes,...thi is it :-)

Posted on Dec 08, 2009

  • 5 Answers


This will solve most "Toner End Life" message problems when you know that there is toner still in the cartridge.
1. Remove the toner assembly by opening the top scanner lid, then pull(tilt) open the front panel, and pull out the toner assembly by gently grabbing the tabs and pull out with an upward motion. The toner cartridge(grey color) and the toner holder assembly (black color) will come out.
2. At the top rear of the assembly you will find a square green tab that can be slide along lengthwise of the toner. Just slide it back and forth fully several (5 to 10 times) times. I carefully blow on it as well(no spitting!) while sliding it.
3. Put the assembly back into the printer, Close the front cover, and drop the scanner cover.
4. Whala ! (usually), actually this has worked everytime for my brother and myself.

Posted on Feb 14, 2010

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1 Answer

Why does my Brother HL 3070CW keeps saying "drum error, clean corona wire on drum". I have cleaned all the corona wires, but still getting the same message.

You have to replace your drum with a new one. It has been worn out and cannot keep the primary charge, resulting poor image quality

Jun 13, 2014 | Office Equipment & Supplies

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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

1 Answer

Fax message says dust on the drum - clean the corona wire

You should find a BLUE SLIDER on top of the Drum Unit, work it back and forth 10 times.

Feb 02, 2010 | Brother IntelliFax-2820 Laser Fax

1 Answer

Fax machine has a message that says "open front cover to remove the drum. Clean the corona wire located on the drum."

The fax machine instruction must be done to erase the
message. The corona wire located on the drum needs to be cleaned.

Sep 24, 2009 | Brother IntelliFax-2820 Laser Fax

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

1 Answer

Cleaning the drum unit corona

Message is telling me that the drum is dusty. It says to clean the corona with the wire. I don't know what the corona is and I cannot find a wire that might help me know how to clean the corona

Aug 18, 2008 | Brother Office Equipment & Supplies

8 Answers

Corona wire

I was getting the clean the corona wire problem message even after repeated cleanings.  Before this problem occured the toner light was flashing warning of low toner. When I got the clean the wire pop up the toner light was on all the time indicating the toner was depleated.  So, I thought I would try replacing the toner cartridge and see what happened. I opened the new toner box and noticed on the foil packege specific instructions to clean the corona wire when installing the new toner.  I installed the new toner and cleaned the wire one more time. I then reinstalled the drum and toner assembly into the printer and the clean the corona wire message did not come up again.  The printer now works fine. 

Aug 08, 2008 | Brother HL 2140 Laser Printer

1 Answer

Pls Clean Drum

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.

Aug 03, 2008 | Brother MFC-8440 All-In-One Laser Printer

2 Answers

"Dust on Drum" problem

try using canned air to clean the coruna chagre wire assy

Apr 16, 2008 | Brother IntelliFax-2820 Laser Fax

2 Answers

Cleaning message

the drum unit may have a full waste toner hopper, I am not sure but defintely do not clean, or touch the drum, you may touch the the drum unit which has a corona wire which occasionally may need cleaning by running a wand across it. there should be a colored clip that will slide back and forth on the drum catridge to clean it.sorry i couldn't be more helpful without actually seeing it.

Thank You,


Apr 01, 2008 | Brother IntelliFAX 4100 Laser Fax

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