Modern Mitsubishi projections.How does the fluid expand?

[JCFitz]

Working on probably the the hundredth modern Mitsubishi projection with fluid leak I've had to deal with. Usually the seals aren't bad it's just that they're bulging at the seams with fluid. You can see the rubber expansion seal practically bulging out the hole in the cover.

Usually I just remove each tube and make the seal concave while draining some fluid and it doesn't leak again. I just wonder if these are overfilled at the factory or the fluid expands over time? RCAs have a similar problem though the expansion seals seem to be made of natural rubber and they crack or get holes in them. Not so with Mitsubishi.

Luckily this one didn't cause too much circuit damage. Just a blown pico fuse because it leaked on the convergence circuit.the STK might be bad.I'll have to see when the washed pc board drys out.