Sounds like a cold solder joint. Sometimes solder doesn't actually bond
to one of the metals it is connecting. The mechanical connection works
for some short or long period of time until a little surface corrosion
creates a barrier to conduction. With experience and magnifying glass,
it is pretty easy to spot. The solder puckers down around the wire,
rather than coming to a tapering end going away from the joint.
Reheating will sometimes fix it, sometimes solder has to be removed and
new solder applied.
I haven't been in an OM-2 for ages. Is this on the printed circuit
board? If so, it could be a crack in a trace on the board, but the way
it continues to work for some time after being moved makes that seem
less likely to me. Whatever, it is almost certainly an interrmittant
connection resulting from corrosion or physical damage and should be
fairly easily repairable..
Moose
dado@xxxxxxxxxxxxxxxxxxxxxxxx wrote:
>Now, I have an observation which is quite puzzling:
>
>The defect of my Om2n is that its longest exposure time in Auto mode is only 5
>seconds (Many reported that this should be at 3.5 min).
>
> I took out the camera's cover located below the mirror, thus exposing the
> electronic PC board. If I touch with my bare finger one of the terminals of
> the so called SW101 (the gold plated things located beside the leftmost SPD,
> that is Silicon Photo Diode, with camera facing you) and then make another
> long exposure test, the time goes to the normal 3.5 minutes. However, this
> condition is only temporary, after several hours, the exposure time will
> return to only about 5 seconds.
>
>Did anybody experience this one? I'd like to have the camera restored to it's
>normal 3.5 minutes long exposure capability and I suspect there is quick fix
>(?) on this problem
>
>
>
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