PDP-11/34 PSU Yet Again

From: Patrick Finnegan <pat_at_purdueriots.com>
Date: Mon Mar 3 23:25:01 2003

On Mon, 3 Mar 2003, Jeffrey Sharp wrote:

> Does anything in the machine even need -5V or +20V? If not, can I leave the
> bad brick in place? I have: KD11-EA, KY11-LB, DL11-W, MS11-JP, M7850 parity,
> DZ11-A, RK11-D. I'll be adding a RX11 at some point. Someone enlighten me,
> please. :-)

Something makes me think that the -5V might be needed for the Unibus, but
I'm probably wrong.

> I'm pretty sure I have a spare brick.
>
> Also: what are these signals on the 6-pin backplane mate-n-locks?
> - AC LO
> - DC LO

Oooh, I know this one. They are set to a logical 'high' state when the AC
voltage coming in or any of the output DC voltages are low, respectively.



Pat
--
Purdue Universtiy ITAP/RCS
Information Technology at Purdue
Research Computing and Storage
http://www-rcd.cc.purdue.edu
Received on Mon Mar 03 2003 - 23:25:01 GMT

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