All you should need to do is remove the one small white wire from pin 2 of the 5U4 socket. If you follow that white wire over to your terminal strip it should connect to the plus end of one of the electrolytic caps and also to one of the black wires that goes to L1. It's possible you have a wiring error on your terminal strip, but for starters remove the white wire from pin 2 and see if that fixes the excessive current draw problem. Looking at your picture it seems to me that you have that white wire from pin 2 going to the negative side of that cap?
