Can you use a PS 1 slim power port in a Famicom? I need a new power port. The part you plug in the ac power cord in back.
That would be a bad idea, the PSOne uses an AC-adapter with a center-positive polarity and a 1.7 mm inner diameter and 4.8 mm outer diameter plug barrel size. The Famicom uses an AC-adapter with a center-negative polarity and a 2.1, 5.5 mm plug barrel size.
If you use the PSOne jack you can only use it with AC-adapters that are normally center-positive which would fry the Famicom.