[ben]

Well, it's not a Philips. So none of the problems I mentioned before. Looks like a Tanashin type mechanism though.
As said, you can't really expect decent performance from something like this. If you want to get it going enough to use while decorating, then open it up and use some 'Servisol 10' contact cleaner spray on the function selector and the internal record-playback slide switch. That should clear up any problems with the audio. Any problems beyond that aren't worth spending time on.

Your AIWA 450 is pretty decent and with a new set of belts will likely shine! Feel free to open a new thread on that if/when you're up for it!