4 elecrolytics on the 5v circuit on that design. If you're getting ripple in there, these are the first spot I'd go after.

C7 100uf 25v radial
C8 47uf 50v radial
C9 330uf 25v radial
C10 18,000uf 25v axial

GPE is the only reliable source for that big 18,000. Nice thing is that the newer production parts are smaller and perform better than the original. So don't be surprised when it's less than half the size of what you're taking off the board.

That rectifier is a pain in the ass to change though, with the bigger lug style leads on it. Did one last week, took both my Hakko 808 plus my regular iron to get enough heat in there to get it out.

-Hans