Yeah all good to repair it, but there are things that need to be modified in order to give it some reliability, just repairing puts it back to square one where it runs way way way too hot and will fail again.
A couple of things are remote mounting the 80V and 30V pass transistors on the main heatsink, building the Current Source circuit which is well documented here, as the FET's in there are fairly stressed and are prone to fail. Also the relays really need replacing at this stage, and there is a mod to change them to use 24V relays instead of the increasingly difficult to get 48V relays.
I would hope all the caps have been replaced on the regulator board as well due to the fact that things get super toasty in there.....
Here's a pic of the one I did recently.., you can see the small transistors mounted on the big heatsinks in the first pic.
The second pic is what it looked like before I did the work on it..
So best to have a look anyway and make sure things are good...
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