Worth fixing a Dual CS 455 / Thorens TD 190???

Yesterday I picked up a Dual CS 455 with an Ortofon OM20 cartridge at Goodwill for $30. Unfortunately for me, it came without an AC to DC adapter (it takes 12V DC).

Long story short, after first seeing that the table worked with one adapter I had, I tried another...which turned out to be AC, not DC. I smelled smoke, and the platter started flying at over 100 RPM--which it now also does with the DC adapter.

Does anyone know what I likely fried and what it might cost to fix it? The Thorens TD 190 is made by Dual and is the same table (plus 78 operation) if that helps for reference. I have a good vintage table I enjoy very much (a Rotel RP1100Q). I'm just trying to figure out if it's worth fixing this Dual--if it won't cost too much and might best the Rotel. At the very least, it seems I've gotten a good MM cartridge out of the deal...

Thanks!