Sy Moen

asked Jun 10, 2021 at 8:24pm
Brother Brother MFC 9970CDW

Vertical color streaks on every print

I got this old printer that seems to be in great condition, but it prints vertical color (C/Y/M) streaks on every page.

You can see a test image side by side with an actual print here:

Cleaning the belt did nothing, cleaning the tray did nothing, cleaning the corona wires seemed to change where the streaks appeared on the page, the toner cartridges are not cleanable.

Before I change out everything, I thought I would solicit some opinions.


Well, maybe its all the cartridges. I replaced the black toner and that was a miracle for the black. I don't have color cartridges on hand, but you can see the black results in the above link. Looks like I have some horizontal banding too, so I'll replace the belt and the toner.

Any other comments would be helpful though, thanks in advance!

by Sy Moen on Jun 10, 2021 at 8:44pm Add comment