I am just finishing up a full restore of a FunHouse and I had to replace a flasher transistor and when I was working on the board I noticed this part had blackened the board and when I turned it on it was very hot; too hot to touch. However, everything is working. Firstly, what is this, I can't seem to find it in the schematics because there is not clear label on the board? Also the two grey cubes next to it also have some discoloration and are warm but not hot. These are BR2 and BR3 which I think are bridge rectifiers?

I see it has a large heat sink so maybe they are just supposed to be this hot? I feel like I should replace them and maybe the bridge rectifiers as well but there maybe some other logic that is driving why they are so warm.

Thanks in advance for any help.

It is the circular part with the purple heat sink in the picture.

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Great thanks. I just wanted to make sure I didn't have something that was going to burnup my board.

Oh, I thought it was System 11 but you are right. Well got my answer in any case.

Thanks for the keen check but I think it was just a flash artifact. I just pulled the glass and they are both perfectly flat. No bulging.

No it does look funny in the pic but is just fine. I was ran to check myself.