This Walkman I bought quite recently non-functional from e-bay for a cheap price. I wanted one with Dolby noise reduction to be able to play some of my cassettes with Dolby. This was before I repaired my WM-B602, which also has Dolby. I had forgot I had the WM-B602, which was more seriously broken and uncertain if it would be worth fixing.
The belt was totally melted:
I made rubber belts myself by laser cutting rubber sheet:
The belt path is simple:
