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[OM] Re: BLM Battery Covers

Subject: [OM] Re: BLM Battery Covers
From: "Jeff Keller" <jeffreyrkeller@xxxxxxxxx>
Date: Fri, 17 Aug 2007 13:36:30 -0700
There's a clock inside the camera that has to be kept running and
there are some memory settings that need to be kept. I can't think of
any other reason for it to be alive when it is turned off. They might
be switching the power around when doors open/close. But I'm throwing
darts at the wall to see what they might hit.

-jeff

On 8/17/07, Moose <olymoose@xxxxxxxxx> wrote:
> Jeff Keller wrote:
> > The 5D has some monitor circuits alive when it is turned off. There is
> > a light that flashes when I play with the CF door even when it is
> > "off".
> >
> I believe the CF door works as an on/off switch too. Notice that the
> light flashes briefly when the on/off switch is turned off or on. If you
> open the door when the main switch is on, it goes off, instantly, even
> if, as Phil Askey forever points out, it is in the middle of a write.
>
> If the main switch is on and the CF door closes, the camera turns on. If
> the main switch is off and the CF door closes, camera there is a quick
> flash of the light, just like when the door is closed and the main
> switch is changed, but the camera stays off.
>
> So it is possible that there is a monitor circuit on all the time. But
> it is also possible that closing the door activates a hard switch, which
> connects to some circuit, perhaps just a monitor circuit, which checks
> the other switch, and promptly turns itself off.
>
> I have no idea which it may be.
>
> Moose

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