M7195 SLU issue might actually be 12v rail
ethan.dicks at gmail.com
Sun Oct 1 11:37:08 CDT 2017
On Sat, Sep 30, 2017 at 6:33 PM, Aaron Jackson via cctalk
<cctalk at classiccmp.org> wrote:
> Hi all,
> Instead of jumping straight in and ordering an SLU, I decided to check
> the power supply voltages. My +12V rail appears to be only giving about
That does not sound fine.
> This is an 11/23+ chassis and the power supply seems very large
What type of box? BA23? BA11-M? BA11-N? You said "11/23+" which
could easily be a BA23, but it's not a guarantee.
In particular I ask because I'm sifting through a pile of DEC Qbus
backplane and PSU assemblies for, I think, a BA11-M, and these have
two PSU modules, one that takes in mains and provides +5V for the
backplane, then a smaller board that taps two cables off the main PSU
and provides +12V and -12V. Both of these bolt down to a common
mounting bracket and have to be removed as a pair then each unit can
be removed from that. The other Qbus supplies I have worked with are
Any sort of Hxxx number you can find would be most illuminating.
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