Not an expert on this brand of printers but it looks like dirty feeder rollers to me. Try cleaning them and Print a Blank document and see if the marks show up
its hitting something as it come out of the fuser check blockage or the cover is not correct Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f
Clutch for paper feed system might be dirty and require cleaning, will be hard to get to. You do have a legacy machine from Minolta. Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f