I was recently successfully replace belts on this deck. Changing wide large belt is done for a couple minutes, BUT first you need to change other little belt - and that is almost mission impossible.
I was first remove motor (unscrew just one screw), then I was little pull up electrical board, and carefully remove old belt. If yours was broken, you can cut it and just remove. Then CAREFULLY place new little belt around black wheel (
read text below!). Then I was pull and place belt on other side (
beneath big wheel where goes large wide belt also). When you install that little belt on his place, you can return motor on his place, and relatively easy place large wide belt. This is easy job!
Pay attention when you pull up electrical board, and remove/place little belt! There you have one little switch (2 or 3 metal strips), and on black wheel you have..... hmm how to say... tentacle/feeler/palpus/palp (I don't know how to say/write this
).
THAT must be
between two little metal strips. If not, cassette deck will start and then just turn off. Just be careful and don't brake that little switches (metal strips)!
It's not easy job, but it was possible. I not speak/write English well, but I hope so that you understand what I try to explain... If somehow I can additional help you, just ask.... and I will try to explain.