I think I have most things sorted (Thanks Trev!)............My biggest problem so far is learning the specific pinball terms, eg "GI"....anyway turns out the generail illumination was completely out, didn't realise it was AC, when I got that worked out it turns out the GI Fuse was shot...BUT...it reads ZERO ohms both in and out of circuit, physically the fuse also looks good....I worked it out when I found 7.5VAC one side of fuse and not the other......As an exercise I put the fuse on the workbench, rigged up an ammeter and load and sure enough fuse is fine until around 4 amps is drawn through it..
Now the only thing that I cant work out from the schematic.....are the lamps inside the bumpers and the lamps that light up the four exit lanes switched or supposed to be on all the time??...at the moment they are always on, but before I re-pinned the PSU Im almost certain that these lamps (certainly the ones inside the bumpers) only flashed when the flippers were used.....Ive spent so many hours so far there is a high chance Im just confused :) does anyone know the correct operation of these lamps?
Thanks