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Re: [OM] Which camera?

Subject: Re: [OM] Which camera?
From: John Hermanson <omtech@xxxxxxxxx>
Date: Mon, 24 Aug 1998 17:43:16 -0400
You might get 6 months or more with a low drain body.  You must use 357
silver oxide batteries as they were designed for use in appliances with
constant low level drain.

John
Camtech

Greg Heier wrote:

> Anyone have a OM-4 that has developed this drain problem? How long does
> a set of batteries generally last in comparison to w/o the circuit drain
> problem? 3 mo vs 1 yr?
>
> Seems like if its anywhere in the months range it would still be
> acceptable (since you can buy several hundred silver oxides for the
> price of a circuit replacement).
>
> -----Original Message-----
> From: owner-olympus@xxxxxxxxxxxxxxx
> [mailto:owner-olympus@xxxxxxxxxxxxxxx]On Behalf Of John Austin
> Sent: Monday, August 24, 1998 1:49 PM
> To: olympus@xxxxxxxxxxxxxxx
> Subject: Re: [OM] Which camera?
>
> Lee Hawkins wrote:
>
> >>The OM-2SP also did NOT have the infamous "circuit" problem of the
> OM-4.
> Of
>
> >
> >Where did you get this idea?  AFAIK, the OM-4, -2S, and -PC *all* could
> >suffer from battery drain problems due to the circuit board design.
>
> I will be happy to stand corrected if I'm wrong on this. In fact, I've
> been
> wrong on lots of things in the past. :-) After talking to John H.,
> Photosphere in Dallas, and Olympus America, I came to the conclusion
> that a
> normally operating OM-4 and OM-2S both have a slightly higher normal
> current
> drain (10 uA) than the OM-4T(i) (5 uA). In addition, an unmodified OM-2S
> uses the camera batteries to illuminate the flash ready light in the
> viewfinder, and this will be a problem only if you leave a flash turned
> on
> for long periods of time.
>
> In addition the OM-4 only, not the OM-2S, can develop a defective
> circuit
> ("famous circuit problem"), wherein the current drain goes up
> dramatically
> (40 uA). This can only be repaired by replacing the main circuit, which
> are
> in very short supply and very expensive. Note that even if the high
> current
> drain situation develops in the OM-4, the camera will still function
> normally. It will just eat batteries at a prodigious rate.
>
> Naturally, the OM-4, OM-2S, OM-PC, and for that matter, the OM-4T(i) can
> all
> develop complete circuit failure of the main circuit board, at which
> point
> the circuit would have to be replaced. This would have nothing to do
> with
> high battery drain. The cost of replacing the circuit board in any
> camera
> but the OM-4T(i) would probably exceed the value of the camera.
>
> Regards,
> John Austin
>
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