I successfully recapped my IIsi logic board, but unfortunately it had feedback issues in the video circuit that I narrowed down to the power supply--namely, physically tapping the tops of the DC-side capacitors in the PSU would cause the banding in the picture to get better or worse. It did successfully boot to System 7.5 just fine despite this, it just has issues on the 5V rail that feeds the video circuit.
In an effort to recap the two power supplies I had, I have ultimately
I'm wondering if anyone has a IIsi power supply, confirmed working, or a IIsi altogether they are willing to part with that I can work with to finish this restoration project. Ideally I would like to not have to open up one of those power supplies again in the near future.
Apologies if this is better suited for the Trading Post forum.
In an effort to recap the two power supplies I had, I have ultimately
- blown up capacitors in one, due to a short I can't seem to find on the AC side, and
- blown an unknown component on the DC side on another due to being an idiot and plugging it in with the mains exposed. Took a nasty shock from that one, luckily the grounding features did their job.
I'm wondering if anyone has a IIsi power supply, confirmed working, or a IIsi altogether they are willing to part with that I can work with to finish this restoration project. Ideally I would like to not have to open up one of those power supplies again in the near future.
Apologies if this is better suited for the Trading Post forum.
