I purchased a very used Amiga 1000 a few months back, and before simply plugging it in, I decided to test the PSU.
The 5volt rail, is a bit low, at 4.9volts, while the 12volt measures at around 9.5volts, and the -5volt is at -4....
Looking in side, the +12volt, and -5volt both appear to use linear regulators? In fact, the -5volt rail uses a positive voltage regulator doing something weird...
There's some weird ripple on the 12volt line, suggesting around 8volt minimum, 12.5volts maximum from memory, but with an average of 9.5volts.
It didn't seem like a capacitor issue, but I replaced all the output capacitors anyway, and sure enough, the voltages are still off.
Should I just give up? Or do the rails need a load to properly regulate?
Thanks!