Brother Printer Vertical Black Line [Solved]

Do you have a Brother printer vertical black line issue? Stop worrying; this is a very common problem with printers, and so it can be easily solved. Simply read this article and find out how to get rid of black line on Brother printer.

Brother Inkjet Printer, MFCJ6945DW, INKvestmentTank Color Inkjet All-in-One Printer with Wireless, Duplex Printing and Up to 1-Year of Ink in-Box, Amazon Dash Replenishment Ready

Brother Printer Vertical Black Lines [Why and Solutions]

The following are what causes vertical lines when printing and the solutions to the problem…

1. The Corona Wire is Dirty

The corona wire inside the drum unit can get dirty and cause your Brother laser printer vertical black line problem.

In this case, you need to clean all corona wires to fix this Brother printer problem.

How to Clean Brother Printer Corona Wire

Follow these steps to clean your Brother printer corona wire…

Step 1: Press down the release button for the printer’s front cover and open it.

Step 2: Gently pull the toner and drum unit assembly out of the printer.

Step 3: Remove the toner cartridge from the drum unit.

Step 4: Push the latches by the left and right side of the cover of the corona wire to open the cover.

Step 5: Gently slide the tab (it is often green) back and forth a few times. This action will clean the corona wire. Ensure you take the tab back to its original position after you are done cleaning the corona wire.

Step 6: Close the cover of the corona wire.

Step 7: Gently shake the toner cartridge from left to right to evenly distribute the toner. Then reinstall it in the drum unit.

Step 8: Reinstall the toner cartridge and drum unit assembly in the printer and then close the printer’s front cover.

Print out a document to see if your Brother printer printing problem has been solved.

If the problem persists try the next solution.

2. The Drum Unit is Dirty

The drum unit can get dirty with paper dust, label, toner, or any foreign material. How do you fix a black line on a Brother printer in this case? Well, all you need to do is clean the drum unit rollers.

How to Clean Brother Printer Drum Unit

Do the following to clean your Brother printer drum unit…

Step 1: Switch off the printer by pressing its power button.

Step 2: Press down the release button for the printer’s front cover and open it.

Step 3: Gently pull the toner and drum unit assembly out of the printer.

Step 4: Place the toner and drum unit assembly on a disposable piece of cloth or paper. Then remove the toner cartridge from the drum unit.

Step 5: There is a gear by the left side of the drum unit. Roll this gear with your thumb and watch the roller as you do this.

Step 6: Use a lint-free piece of cloth or cotton swab and clean the rollers as best as you can. If there is any glue-like stain on the rollers then use isopropyl alcohol to clean it off.

Step 7: Reinstall the toner cartridge in the drum unit and then reinstall the assembly back to the printer.

Print out any document and see if the problem has been rectified.

If it isn’t, move to the next solution.

3. Damaged Ink or Toner Cartridge

Check your toner or ink cartridge if you’re still wondering: “How do I get rid of black line on my Brother printer?” If any cartridge appears damaged then it has to be replaced to solve the problem.

How to Replace Brother Printer Toner Cartridge

Follow these steps to replace your Brother printer toner cartridge…

Step 1: Ensure your printer is on, and then open its front cover.

Step 2: Remove the drum unit assembly from the printer, and then place it on any piece of disposable cloth or paper.

Step 3: Next, remove the toner cartridge by pushing down the green locking tab like in the previous solution.

Step 4: Get the new toner and remove its protective cover.

Step 5: There is a corona wire inside the drum unit, shift the green tab forth and back a few times to clean this corona wire.

Step 6: Put the new toner into the drum unit assembly.

Step 7:  Reinstall the toner and drum unit assembly back in the printer and then close the front cover.

This toner cartridge below is compatible with the following Brother printers: DCP L5500DN, DCP L5600DN, DCP L5650DN, HL L5000D, HL L5100DN, HL L5200DW, HL L5200DWT, HL L6200DW, HL L6200DWT, HL L6250DW, HL L6300DW, HL L6400DW, HL L6400DWT, MFC L5700DW, MFC L5800DW, MFC L5850DW, MFC L5900DW, MFC L6700DW, MFC L6750DW, MFC L6800DW, MFC L6900DW

Brother TN-850 DCP-L5500 L5600 L5650 HL-L5000 L5100 L5200 L6200 L650 L6300 L6400 MFC-L5700 L5750 L5800 L5850 L5900 L6700 L6750 L6800 L6900 Toner Cartridge (Black) in Retail Packaging

How to Replace Brother Printer Ink Cartridge

The following are steps to replace a Brother printer ink cartridge…

Step 1: Open the door that covers the printer’s ink cartridge.

Step 2: Push down the colored lever and remove the ink cartridge to be replaced.

Step 3: Keep the printer on so that it will detect the ink after installation.

Step 4: Put the new ink cartridge in the printer. Ensure you insert the cartridge from the arrow label on it.

Step 5: Your printer will send a confirmatory message as you install the ink cartridge. For instance, “Did you change red?” Ensure to choose “Yes”.

Step 6: Once you are done installing the cartridge ink, close the ink cover door and test run the printer. 

This ink cartridge is compatible with Brother printers: MFC-J4310DW, MFC-4410DW, MFC-4510DW, MFC-4610DW, MFC-4710DW, MFC-6520DW, MFC-6720DW, MFC-6920DW

Brother LC103 Ink Cartridge (Black, Cyan, Magenta, Yellow, 4-Pack) in Retail Packaging

4. Damaged Drum Unit

If the drum unit gets damaged, it may result in your Brother printer printing vertical black line. You have to take out the drum unit and inspect its surface and rollers for any sort of damage. If any is found then you need to replace the drum unit to fix the problem.

How to Replace Brother Printer Drum Unit

Do the following to replace your Brother printer drum unit…

Step 1: Keep the printer on and then open its front cover. Next, take the drum unit and toner assembly out of the printer.

Step 2: Remove the toner cartridge out of the assembly by pushing the green lever.

Step 3: Get the new drum and unpack it.

Step 4: Install the toner cartridge into the new drum unit and ensure it clicks in place.

Step 5: Put the toner cartridge and drum unit assembly back into the printer and then close the printer’s front cover.

Step 6: The drum counter has to be reset after the drum unit is replaced, do the following to do this:

i. Keep the printer on.

ii. Press the cancel button.

iii. Press down the Toner button for at least 5 seconds.

iv. Select “Drum” and finally press “Yes”.

This video is a visual representation of the above steps…

To read more awesome articles, click any of the links below…

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5. Contaminated Fuser Unit

The fuser unit may be contaminated if at this point you are still wondering: “How to fix black line on Brother printer”. However, this is a complex problem and so we advise that you contact a professional or Brother Customer Service.

Or, you may consider getting a new printer if you have had your printer for a while. Check out this awesome Brother INKvestmentTank printer below.