H750 (PDP-11) power on?

From: John Allain <allain_at_panix.com>
Date: Wed May 26 23:40:57 2004

> Oh, check all the circuit breakers are on.
> It's easy to knock on to the 'off' postiion.

I don't see a big flipswitch circuit breaker on this old guy, nothing
like the newer 11/34 that's here. There is a little 10A pushbutton,
which has been depressed lately, but that's another story. <g>.

> ...there are 2 microswitches for the power switching function (and
> one for the panel-lock function to disable the toggle switches). One
> directly switches mains to the CPU power supply.

This is a keyswitch front panel, with no key, so I opened it to the
microswitches and tried pushing them to get the fans going, etc.
and nothing. I judged, given the camming, that the lower switch
(black,blue) was the panel unlock and the upper (grey,grey) the
power. That might be incorrect. Also, the backpanel three pin
connector described earlier came cabled, hence the suspicion
that it was the/part of the power on. I'll try again tomorrow.

John A.
Received on Wed May 26 2004 - 23:40:57 BST