Brother Laser Printer Issues - Smeared or Blurry Lines on Paper MFC-8810DW, MFC-8710DW, MFC-8510DN

If you have blurry, smeared lines on printed pages of your Brother Laser printer, that is usually an indicator of a hone fuser unit, but to make sure follow the instructions on video of how to check if it really is the fuser assembly problem and not something else.
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[@haritssetyawan7329]

I have the same problem with HL6200DW

[@sammytimgaming2947]

I printed a fuzzy moustache out of some kind of printer is other some kind if Pinter or film that had fuz stands on it

[@TonyRush]

Great video. I like your communication style. Can I ask a question?
I use a Brother MFC-L5900DW and I'm seeing poor print quality...but ONLY on the 2nd side. In other words, on a double-sided print job, the "front" of the page is good...but the "back" of the page has a long line along the edge of the page.
Any idea what would cause this? Thanks in advance!

[@303electronics]

Hello. I'm not exactly sure why it does that. It is possible that the drum may need adjustment or replacement.

[@TonyRush]

@@303electronics Hey, thanks for chiming in! Unfortunately, I've swapped out the drum and the cartridge and neither seems to help. Neither does cleaning the fuser rollers in the back. I think I may just need to replace it. It's done 251,000 pages since I bought it. Is that good?