DEC 874-A Power Conditioner
pete at dunnington.plus.com
Wed Jan 4 02:18:25 CST 2006
On Jan 3 2006, 20:40, Julian Wolfe wrote:
> AFAIK, there's only one panel for all 11/03, /23, and /23+ models,
> come with different badges. You need a DEC power bus cable. Run it
> the connector on the CPU box to the power controller, set it to
> and flip the far right switch. Viola, power from the front panel.
Yes, but... on some QBus systems the switch is jumpered to control the
LTC (Line Time Clock signal) by grounding the BEVENT bus line. You
ought to check the jumpers on the little electronics board before you
wire an unknown system to the power bus. I've accidentally done it
with the wrong jumper settings and it's done no harm, but YMMV.
BTW, the connectors for the power bus are standard 3-pin AMP Commercial
Mate-N-Lock conectors, which are fairly easy to get.
Pete Peter Turnbull
University of York
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