Most modern arcade PSUs I seen stick to Fuhjyyu brand capacitors (imo not a good sign though results may vary). Older ones use PCE brand capacitors.
As for adjustment pots, Happs/LT-200Ws rarely go bad and I myself never had to replace one. Others that use use normal potentiometers go bad after ~10-15 years resulting in fluctuating resistance (cue the Peter Chous that shut down as a safety measure from sudden adjustment pot changes). One Peter Chou I just fixed had that same problem.
As for adjustment pots, Happs/LT-200Ws rarely go bad and I myself never had to replace one. Others that use use normal potentiometers go bad after ~10-15 years resulting in fluctuating resistance (cue the Peter Chous that shut down as a safety measure from sudden adjustment pot changes). One Peter Chou I just fixed had that same problem.




