Hey, I just tried fixing my old PS-488 (MK-1). Hadn't used it for about 20 years amd the belt was entirely disintegrated and I had to wipe it of. Already replaced it. Now that I put it back together I have the following issue: - fast forward and rewind: works like a charm - play: engine is running, it goes 'eugh,eugh,eugh,eugh' but no trnsportation of the cassette tape. - when I remove the cassette and fake it by manually pressing the cassette detector with my fingers and then press play, the reel transporter runs with a solid strength and the freshly replaced belt does its job, but whenever a cassette is inside, it doesn't do anything (but eugheugheugh..). Tested with several cassettes. Does anybody have an idea what could be wrong?