VAXmate PSU

Thanks Eric, I had a private reply that said pretty much the same thing. Last night I replaced the shorted diode and another electrolytic capacitor and the PSU started up on the bench, powering a load board and an RD53 hard disk. Ripple was good except on the -9V output, but that output doesn?t seem to have any capacitors after the final transformer, so I think it is OK. I need to replace a few marginal capacitors on the video module now, while I have the machine in bits. Then I will put it all back together to see that it still works. I have a lingering worry that the failed diode was on the +28V supply to the video module and that there might be a fault on the video module, but it doesn?t appear to present a short circuit, so I am hopeful. I will do a blog post once it is all back up and running. Thanks Rob