Question about Brother HL-4040CN Laser Printer

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Printing problem brother hl4040 cn laser printer printing blue line (vertical) on page. Cleaned corona wires still having the same problem.

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Vertical line is probably scratch in Toner/image drum or one of the erase LED bar lamps is out. Start by replacing the Drum and see if it is better. LED erase lamp assy is more expensive so I hope for you that it is the drum.

Saw this scratched tomer drum on a ton of HP I serviced while in Europe

Cheers!

Posted on Mar 26, 2009

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My HL2040 printer is printing black vertical lines along the right-hand side of the page, about 3" or so. A month ago I took it apart and cleaned the roller. Still doing it.


If the lines go all the way down the page, check the position of the corona wire cleaner tab (blue or green) at the top front of the drum unit. if not parked fully to one side it will create a solid black lines where it blocks the laser. Otherwise look for some other foreign object (or torn paper piece) that may be blocking the laser from the drum. If the lines are thin and shark, check for scratches on the drum (not repairable without replacing drum). If the lines are uneven thickness but in a pattern that repeats down the page every few inches, then the film on the drum is probably worn or wearing away and the drum needs to be replaced.

Mar 04, 2015 | Brother HL-2040 Laser Printer

1 Answer

My Brother MFC-7420 Printer always prints black lines and splotches down the left side of my paper. This happens whether I'm scanning or printing from my PC. When I looked at my drum, it appears a


If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
4) Reinstall the drum unit and toner cartridge.
5) Close the front cover.
Caution: if you do not return the blue tab to the home position it may repeat the black lines.

Nov 29, 2012 | Brother MFC 7420 All-In-One Laser Printer

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3 vertical dashed lines down every page


Hi there, I would assume that you are speaking about a laser printer, if this is the case you would have to take the printer in for a service and ask them to clean the primary and secondary corona wires.

A dirt corona wire can cause a vertical lines down the print job cause that part of the OPC drum is not being charged by the charge corona.
Could also be a dirty drum.

Hope this helps. :)
Please let me know.

Jun 29, 2012 | Printers & Copiers

1 Answer

Vertical single black line on printed pages - does this mean I need a new cartridge or a new drum? Brother HL 1250


The first thing I would try is to fix the corona wire. Here is a link to Brother's website outlining the process (clean corona wire).
What you need to do is pull out the drum and look for a blue tab on the top of the cartridge. Slide that tab back and forth along the wire and see if that clears things up.
I have had some luck cleaning the drum when I get black streaks but I have also hear this can be dangerous and make the problem worse.

Feb 09, 2011 | Brother HL 1250 Laser Printer

1 Answer

When printing their is a white vertical line through the entire page.I am using a Brothers MFC-6800 printer with a operation system Window XP professional.


The first thing I would try is to fix the corona wire. Here is a link to Brother's website outlining the process (clean corona wire).
What you need to do is pull out the drum and look for a blue tab on the top of the cartridge. Slide that tab back and forth along the wire and see if that clears things up.
I have had some luck cleaning the drum when I get black streaks but I have also hear this can be dangerous and make the problem worse.

Dec 30, 2010 | Brother MFC 6800 All-In-One Laser Printer

1 Answer

Brother MFC-6800 1. Prints with 3/8" blank vertical line down the entire page; 2. Prints with a couple of 1/16" blank vertical lines down the entire page; 3. Prints with some gray shadow...


This solution is unconventional but it worked for me. The black roller on my MFC had irregularities on it and was creating horrible printouts. I pulled out the drum and cartridge and cleaned the large black roller. I used furniture polish to make the roller very smooth. Now it prints really nice.

Nov 29, 2010 | Brother MFC 6800 All-In-One Laser Printer

1 Answer

I feel like the drum needs cleaned. My copies all


On the drum try cleaning the corona wire by sliding the light blue slide left & right. if that does not work you might need a new drum. I have them for 50 bucks 805-520-3003

Jan 21, 2010 | Brother MFC 7420 All-In-One Laser Printer

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Vertical lines printed on right side of every page


Would be helpful to know the brand and model of the printer. Sometimes this is caused by not returning the slide used to clean the primary corona wire to its original position (usually to the extreme left side of the toner cartridge) after cleaning the corona wire. If you haven't cleaned the corona wire, you should follow instructions and do that first.

Jul 22, 2009 | Dell 3000cn Color Laser Printer

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