Answer to your Frequently Asked Question:

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Description of Problem 100000030837

How do I clear black, cyan, magenta, or yellow vertical lines or streaks on printed documents?

Description of Solution 200000039620

1. Click on the link below to download a test pattern and print the test pattern.


2. Review the two pages that are printed to identify the color causing the problem.


- If the vertical line is from top to bottom on both pages that are printed, continue to STEP 3 to clean the corona wire for the color line you see on the test pattern.


- If the vertical line is only seen in 1 of the 4 boxes that are printed, replace the toner cartridge of the color you see the line in.


3. Clean the corona wire.


a. Lift the top cover using the indented handle in the center until you hear a click.


NOTE: Failure to completely open the top cover when removing and installing consumables may cause severe damage to the machine. The top cover is completely open when the cover locks in place and does not require support from the user.



b. Lift the drum and toner assembly out of the Brother machine of the color that is causing the line on the print sample. For example, if the vertical line is cyan color, you should remove the cyan drum and toner assembly.



NOTE: We recommend that you place the drum unit and toner cartridge assembly on a clean, flat surface with a sheet of disposable paper or cloth underneath it in case you accidently spill or scatter toner


c. Clean the primary corona wire inside the drum unit by gently sliding the green tab located on top of the drum unit, from left to right several times. Return the green tab to the home position.



NOTE: That corona wire should be located on the left hand side and the small triangle on the green tab should match up to the small triangle on the black portion of the drum unit.


-  If the corona wire tab is on the right hand side, push the corona wire tab to the left as far as it can go. The corona wire tab should match up to the small triangle on the gray portion of the drum unit.



-  If the corona wire tab is on the left hand side, ask the customer to verify that it is pushed completely to the left side and matching up with the small triangle on the black portion of the drum unit.



d. Push down the green-labeled lock lever and take the toner cartridge out of the drum unit.



e. Put the print sample in front of the drum unit and find the exact position of the poor print.


f. Turn the drum unit gear which is located on the left side with your thumb or finger while also looking at the surface of the drum unit for any dust, label, or glue like substance on the drum unit roller.



g. When you have found the mark on the drum that matches the print samples, wipe the surface of the drum with a dry cotton swab until the dust or glue on the surface comes off. If unable to locate any dust or glue on the surface, wipe the drum surface using a soft dry cloth dampen in isopropyl alcohol.



h. Put the toner cartridge back firmly into the drum unit. You will hear it lock into place.



i. Slide the drum and toner cartridge assembly into the Brother machine. Make sure that you match the toner cartridge color to the same color label on the Brother machine.



j. If you are getting multiple colored vertical lines, follow STEPS c - i to clean the corona wire of that color drum.


k. Close the top cover of the Brother machine.


4. Print the test pattern from STEP 1 again or print the document from your computer.


- If the document prints fine, the issue is resolved.


- If the problem continues, replace the drum and toner cartridge for the color causing vertical line. Below is information about purchasing the drum unit for the Brother machine.


Brother strongly recommends that customers use only genuine Brother drum units and/or toner cartridges.  Each Brother machine 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 Brother limited warranty does not apply to any problem that is caused by the use of non-Brother drum units, toner cartridges or toner.


Drum units for the Brother machine are only available as a set at retail and the item number is DR221CL. Please be aware that under normal conditions, all 4 drum units will need to be replaced at or about the same time since all 4 drums rotate in unison during the various stages of  the Brother machine's operation regardless of whether toner is deposited on the page for that specific color or not.


It is Brother's recommendation that the retail set be purchased, you replace the drum unit as requested, and any unused drums be left in their original packaging until the Brother machine requests their replacement.


Refer to the following solution for instructions for replacing the drum unit - "How do I install a new drum unit? How do I replace the drum unit?"


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