I have an old Dean Markley K-300B and it is just now starting to have some electronics trouble. When I turn it on it buzzes. I can here sound from it but I have to turn it and the bass all the way up for it to be heard, and then it sounds terrible, of course. It is a great amp and I would hate to have to stop using it just because I can't get it fixed. I have had it for years and it is probably more sentimental than anything but it is just a good amp. Does anyone know how I might be able to get a schematic on this old thing? Dean Markley is no longer in the amp business so I thought I would ask around an maybe stumble into one. Thanks and keep bassin'