Question about Brother DCP-7020 All-In-One Laser Printer

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Drum ( i think)

Hi. Every time I print something out for the Dr. I work for he complains about an ink streak that travels down the center of the paper making it look rather unattractive. His solution is to buy a new one, but I'm thinking there is a nother solution that is probably easier and cheaper. Help, please?

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  • gstrp1143 Aug 18, 2008

    Problem starts the same with line down paper but when I remove the ink unit I can see toner sticking to the drum. How do you remove the toner from the drum and keep it from sticking again?

  • Anonymous Aug 21, 2008

    I get a black streak on copies when the heater element warms up only. When I look at the heater roller, there is actually a black mark that surrounds the whole roller, 1/8 inch, which equals the mark on the copies.

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I had the same problem and emailed brother. they suggested cleaning the drum by taking out the toner cartridge, and cleaning the primary corona wire which is inside the drum unit and can be found' by locating the blue tab on the top of the drum unit and sliding it from left to right several times. Return the blue tab to the home position before reinstalling the toner and drum unit assembly.'

The blue tab thingie is in the back and goes side to side which is different than the blue tab that you push to get the toner cartridge in. That one goes back and forth.

Anyway, I tried it and it worked for me.

P.S. the instructions from Brother also said that you might want to clean the laser glass with a dry lint free cloth. This is the think piece of glass above where drum unit is installed. they warn NOT to use any liquid. However, i did not have to do this. the blue tab (corona wire) worked by itself.

Posted on Jul 12, 2008

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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


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Hello,

Two things can cause this type of problem, 1 bad drum unit or 2 dirty corona wire.

HTML clipboard Below are the directions to clean the wire.
1. Open the front cover and pull out the drum unit and toner cartridge assembly.
2. Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left several times.
3. Return the blue tab and click it into the Home position.
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Be sure to return the sliding blue tab back to the home position next to the arrow or you will have dark streaks on your printouts.


If this does not solve the problem then you will need to replace the transfer drum in the printer. The part number for the drum is DR-400 or DR400.

I hope this helps, if so please rate our solution.

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