fan speedup-power supply question
derekp at gvlf9-m.gvl.unisys.com
derekp at gvlf9-m.gvl.unisys.com
Wed Jun 12 22:55:17 AEST 1991
I bought a powers supply that was supposed to be for a 3b1, for a
spare. Last night (quite hot) I encountered the mysterious fan speed
up/slow down problem for the first time, so I went to replace it with
the AC fan. This is what causes me to ask the great questions:
1. The fan didn't do the speed up slow down trick until after
installation of a combo card (in slot 0) AND the occurance of
a hot day (No its not in an air conditioned room, no I don't
leave it on all the time)
Is there a connection with the combo card, and slot 0 (under the
power supply). There was not a lot of dust under or in the fan.
2. The power supply: The one I bought was marked
Power Systems: pn PS-1569
5v/20a 12v/3.5a -12v/100ma.
What I foud went I went thru the fan exercise (my supply, which
is functional)
Power Systems: pn PS-1610-1
5v/20a 12v/5a -12v/300ma.
What is a proper PS for a 3b1. (67 meg drive 3.5 meg ram 1.5 of
which is on a combo card)
Did I buy a 7300 PS?
Thanks for any info...
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