I'm going thru a pair of AU-999 amplifiers, and I find that one of them has a few caps and resistors mounted on a tag board underneath. Pics are below. They are between the driver to66 sockets and the main filter caps in the pics. I've looked at other pics of 999s on the net and see that some other ones have these parts too. I can't find them on the schematics. Anyone know what they are for? They appear to be wired into the front tone and filter boards. I need a new microswitch for the power switch assy. Does anyone have a good part number? Also, there are other terminals on the wafer part of the power switch that look like they are going to the phono preamp board. Anyone know what these do and how they are wired?