Nothing. They used the same board for more than one model, certain parts differences would be for that. Like C81,82 are in the same spots as C40,41, but the "missing" parts were axial leaded and would lie flat in place of the vertical (radial) C40,41. I would assume what is in there is correct as made, even if not matching the drawing.
I don't worry if the whole thing has lower voltage. But I must ask, are you using a light bulb limiter? If so, that explains your low voltages.