There are two RIFA capacitors in the Apple II power supply unit, a.k.a. PSU, that are prone to blowing out and a fuse that may or may not need to be replaced. After watching so many restoration videos, I came to the conclusion that replacing these capacitors should be the first repair done if you intend to embark on a restoration journey. You’ll find below the specifications and a video from lmull3 explaining how to do it.
- 0.1uF 100nF 275 Vac CLASS X2 CAPACITOR
- 0.47uF 470nF 275 Vac CLASS X2 CAPACITOR
- GLASS FUSE F2A 250V