SGI Indigo Power Supply Pinout?

[devin davison]

I Have an indigo that has not gotten much use aside from when i first
picked it up. It has the bigger power supply as well and is maxed out on
memory. As a last resort, I could sell you my machine. It boots, I had
rigged a peice of jumper wire to the battery to overcome a flat battery, i
did not want to attempt desoldering the battery on board. I have been
focusing less on the smaller workstations like the indigo and octane and
have been using my onyx and crimson, so I am looking to get rid of the
smaller workstations.



On Sun, Apr 8, 2018 at 12:18 AM, Ethan via cctalk <cctalk at classiccmp.org>
wrote:

>
> Howdy,
>
>  Working on fixing an old SGI Indigo of mine in prep for VCF East.
>
>  The issue is once any sort of IRIX kernel is running, it craps out
> WARNING: Power Failure Detected at a high rate.
>
>  The SGI Indigo and a few other similar models could push out that error
> on the local console and perhaps network inbetween the time that AC power
> was lost going into the power supply and the power supply had discharged
> enough for system to die. Pretty impressive and strange! I was amazed when
> I first noticed it, of course now it has come back to haunt me.
>
>  I have replaced some of the electrolytic caps in the power supply.
>
>  But in the spirit of troubleshooting, does anyone have any sort of
> schematics or documentation on the power supply, or the midplane?
>
>  This is a R4000 Indigo and has the higher output power supply to support
> bigger CPU and graphics.
>
>  In the meantime I'm working to document what I can about the power
> connector and will publish, but I can only get so far without other insight.
>
>  Thanks
>
>
>
> --
> : Ethan O'Toole
>
>
>