Given the circumstances (extreme cold) I would also suspect jamming by
overwind -- when the grease on the levers beside the battery chamber gets
thick, they can't operate to stop the wind when they should. As a result,
the gears "overwind" and jam the shutter. In this case, though, the meter
will usually operate. Warming will have no effect -- only disassembly of
the gear train and subsequent removal of the excessive lubrication on those
levers will correct the problem and prevent a repeat performance.
Another possibility (though not usually related to cold) would be if the MD
switch (unlike other OM's, it's located beneath the mirror) hung up the
inertia retard that slows the mirror lifting to provide time for the program
mechanism to operate. This is another malady that would need professional
attention for a reliable solution.
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----- Original Message -----
From: "Rainer Wagner" <rainer@xxxxxxxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Thursday, March 04, 2004 4:50 AM
Subject: [OM] Frozen OM2SP?
>
>
> Hi repair specialists,
>
> I need some help again..
>
> A minute ago a colleague came in with the official OM2sp of his group. He
> had used it to take pictures of biological specimens at -20°C inside a
cold
> box. The camera had been cold as well for about 45 min. After that time ,
> the trigger was blocked and now , a day later for warming up, the camera
is
> still totally blocked: Trigger and winding blocked, no display in the
> viewfinder visible . The battery check beeps ok. Is that something we
could
> look for ourselves, or is it a major repair job?
>
> Thanks for hints!
> Rainer
>
> Dr. Rainer Wagner
> MPI für neurologische Forschung Köln
> Gleueler Str. 50
>
> D- 50931 Köln
>
> phone 49 (0)221 4726224
> fax 49 (0)221 4726298
>
>
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