tracing out schematics

If it's a simple board with just a top and bottom layer, then I normally photocopy it and use that in conjunction with the real pcb to make a copy of the traces. however the problem comes when you have a lot of fine tracks on the board as in the case of something complex like a CPU board. also you would need to take into account more than 2 layers. now i'm assuming by your post it's a PSU board? if so, you may be better off tracing out the board onto a piece of paper like I suggested above as that would normally only be 2 layers. with usually the HV on the bottom side and the LV on the top. It may even be just a single layer board as is in most modern PC PSUs. That said, if you have connectino diagrams, have you thought about using an ATX psu? it's ok for switch on/off just short pin 14 on the atx connector (green wire iirc) to ground and that will turn on the psu. regards charles <CUT>