When the large electrolytic capacitor overheated in the Vivitar VI dichroic enlarger owned by a friend, the electrolyte leaked out and the power supply was dead. We bought a replacement motor-run capacitor of the same ratings, installed it and it worked perfectly thereafter. The capacitor cost about $8 at Grainger Industrial Supplies about 1997 when we replaced it. So far as I know it continues to work normally since the capacitor was replaced.
The Vivitar VI dichroic head uses an 80-watt 19-volt EKG lamp. A significantly higher voltage will destroy the bulb.