Straight up not having a good time today. Gonna try to funnel my emotions into fixing this mofo.
I checked the Command Module separately with the AT supply again. It's dead, Jim. Maybe independently of the PSU and the PSU was iffy all along. Which I did not notice because the squeaky sounds it makes were muffled by the fan noise. And the faulty 24V line is used only for the fans and I never checked it.
Gonna focus on the PSU first, since I got it apart.
Gonna focus on the PSU first, since I got it apart.
The 24V output is supposed to deliver up to 1.5A. An LM350T linear regulator is used for regulation there. This is its input. Second capture is a power on-off cycle. That tracks with the squeaking that can be heard.
It took only ten or so years after the Asperger's diagnosis to figure that one out and get it in writing. Geez.