Anyway, with the help of the manuals on this site - and helpful comments from members - I have been able to resurrect the system and am thoroughly enjoying it. I _genuinely_ couldn't have done it without this forum. I have bought many spares (belts / grommets / feet / bushes / capacitors etc) from beoparts-shop, who provide a first class service. All I now need to do is have the MMC4 cartridge looked at by audio-origin.
So, many thanks to all on here!