I have a 5000 that I'm restoring, and it had the F-1040 boards. I ordered a set of F-6013 boards that arrived, and I'm trying to follow Service Bulletin CE-037A to install it. Meanwhile, my boss gave me (!) his dad's 5000a; while the schematic shows F-1040, this has F-6013s that look original. Two things puzzle me: first, on the replacement board, there's a 2.2 k resistor hanging off the back of TR-805, that is not on the board installed in the 5000a. This is the resistor in question. One board has a white wire cut off, the other has a black one. And this is the same spot on the installed board, with no resistor. So, is this needed, or not, and if so, where is the black (white) wire going to? Second question: as I read it, Service Bulletin CE-037A removes C027, C028, R041 and R042 from the system entirely, as well as the gray/white blue/black pairs of wires from them; is this correct?