Hello folks. I have just got myself an HP 54503a oscilloscope, and while there are manuals for this and that, one called "service manual" does not appear to have a diagrammatic or parts list included in it. Appreciate suggestions of where to find one please- I am prepared to pay if required- best effort so far seems to be a dvd available ex ebay for a collection of HP manuals but none of these have that diagram. Appreciate some help please- google isn't working on this one, nor is ebay.com- there is one in ebay.uk called 54502a and I have just bought that one even though its called service manual I doubt if there is a diagram inside it. There are diagrams for lots of other hp products, but not this one- seems weird to me. Cheers. Mark