Black Jupiter 2000 Function generator circuit.

[pamphonica]

I realise this thread is a bit old, but I need any circuit details I can find on this function generator.
I have one with a distorted output and need to fault-find it.
I tried the link for the circuit diagram and for some reason it does not work for me.
Can anyone let me have a copy of the circuit diagram, please (or any other details to help service it)?
Many thanks
Jeremy