VAXmate PSU

Holm Tiffe holm at freibergnet.de
Thu Apr 16 03:12:15 CDT 2020


Rob Jarratt via cctalk wrote:

> Thanks Eric, I had a private reply that said pretty much the same thing.
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> 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.
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> 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.
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> I will do a blog post once it is all back up and running.
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> Thanks
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> Rob
> 

Congratulations Rob, you made it.

Regards,

Holm
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