The switch at the rear of the deck that switches between balanced and unbalanced has been seen broken many times at my location and I have had to use switches that are almost the right size. Recently I went looking again for this Alps 530C switch and I found them at Mouser of all places. I ordered 60 of them but I am sure they are probably out of production now so get them while you can. It is an exact correct part to install in the PCB. If interested I can give you the part number.