I'm sorry if this has been posted before. I tried searching here and on Google, but couldn't figure out what I should even be searching for.
I'm attaching a photo to illustrate what is happening when we print. There are white streaks that appear equally distant apart. I tried taking out the drum unit and inspecting the head, but I don't see anything that would be causing this on the actual unit.
It is a Brother HL-3170CDW Printer.
Thank you for any help anyone can offer.