I have found a couple of copies of the 2505 FSM on this and other forums (same copy, 36K00 and later) but nothing on the MC2505-2. They don't match. If you have anything: documents, links, personal notes, I will very much appreciate any help. I listen to this system regularly, and am starting to think I should be checking some of the voltages, currents, bias resistors, etc. to be sure that I can listen to it for a long time. TIA.