I've got this old DOD phasor from the 70s. It's a big box one. It's my grandfathers and I'd like to get it fixed. About 10 years ago it broke, he plugged the battery in backwards and it stopped working. I replaced the op-amps and the electrolytics and a diode on the board that tested bad. I re-wired it today with pictures online of inside the chassis. The video will explain my problem. Also has anyone have a schematic or diagram on this thing? It's like non existent.