The updated 4 circuit (2-3 varieties) was found only in OM-4 bodies
repaired by olympus. No plain OM-4 left the factory with low drain
boards. 2S was out for such a short time that olympus (Sharp, actually)
never redesigned the board for low drain.
On Wed, Oct 19, 2022 at 9:42 AM Mike Bloor <admin@xxxxxxxxxx> wrote:
> Olympus brought out a revised circuit board for the OM4 that fixed
> the battery drain problem long before the OM4T was introduced.
> Batteries in my OM4 - one of the first made - only lasted for two
> films until the board was replaced. Since then batteries have the
> same kind of life that they have in an OM2n.
>
> If the battery check light on an OM4 turns off after 30 seconds, then
> the camera has the revised circuit board.
>
> Mike
>
> >Wayne,
> >I don't think there is a fix to the circuit problem. Replacement boards
> >haven't been available forever, but even so, the camera just works as
> >such. Manual 60 was a habitual thing when I was using the camera, and I
> >got pretty used to removing the batteries for longer storage periods, and
> >buying batts in bulk. More or less the same for the OM-4. But they're
> >lovely cameras to use. I never had any problems with OM-4s once I got
> used
> >to battery preservation strategies from OM-2S use. Seems like Oly didn't
> >really consider it a problem until they developed what came out as the
> >OM-4T, but I don't really know other than one man's experience put to it.
> >
> >Joel W.
> --
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>
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John Hermanson
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