One more thing to fix... HP9000/380 power supply

On 2021-02-11 10:55 p.m., Carlos E Murillo-Sanchez via cctalk wrote: > This decade seems to have increased the number of failing things in > such a way that the "to be repaired" backlog is growing much faster > than I can get to diminish it. Argh.? A month ago my trusty > HP9000/380 ran just fine and I booted the different OS's in the SCSI > and HPIB drives connected to it (this particular machine is > interesting because the 9000/300 port of NetBSD was partly developed > in it: it was Mike Wolfson's). Yesterday, it failed to turn on; the > power supply is dead.? So I unracked the pile of drives and the > computer, checked for obvious things (the fuse is fine, and nothing > in the power supply is swelled up or leaking, or browned by heat; > visually, it looks new; the HV caps seem to hold a charge).? I need > the schematics for the power supply (at least the output connector; I > can work my way back from that)? and also those for the backplane in > this hp9000/380.? A preliminary search at bitsavers and elsewhere did > not help.? Does anybody have these?

I have never seen any schematics for this power supply however on bitsavers there is a document related to the expander that shows the power supply pinout. http://www.bitsavers.org/pdf/hp/9000_300/specs/A-98568-66501-4_98568A_Schem… This would be the same power supply as the processor box. Also http://www.bitsavers.org/pdf/hp/9000_300/specs/A-98561-66501-4_98561AB_Sche… Paul.