My PS7 Ps is sick. On looking at the schematic in the book it doesn't agree with my supply. One of my PS7's has a plug-in circuit board..This supply the board is hard wired and the crowbar doesn't agree with the book. Does anyone have a schematic for this or a little (or a lot) of help. Mny tnx in advance es Best 73 Morry K3DPJ