It's dirty head, cleaning is complicated, best fix is return to Panasonic. They'll clean head and replace rubber rollers. Sorry, but it will cost about $300 plus shipping, but there's really no other way.
One other piece of advice, when you get your deck back from service, test it with a tape you don't care about. I made the mistake of inserting a "high-value" tape into a freshly serviced deck. The deck ate the tape and it took a local tech 2 hours to extract it. Thankfully it was not damaged. The deck's transport carriage was damaged... Lesson learned.