I'm tinkering with my westfield mvg600rc combo amp, and someone else has done some work on it before me. I can't find any schematics for it on Google, in fact, I can find very little about it all. Can anyone suggest a good place to look for some schematics/info on this thing? I've replaced a couple of obviously leaky capacitors, but there's a jumper lead on the main board and I'm scared to remove it until I have an idea why it was put there in the first place.