Thanks Moose, I'm going to whip out the multimeter and give it a go. I
thought it might have been been components on the circuit board getting
aged, but what you suggested is a sensible place to start. I'll let you
know how it goes...
Moose wrote:
> Matt Boland wrote:
>
>
>>Hi Guys,
>>
>> even after trying Sony SR44W and the heralded Energizer 357s (all
>>fresh) my OM4T continues to sometimes get stuck with the mirror locked
>>up whilst the shutter is closed.
>>
>>Obviously it needs servicing. Has anybody seen this before, and do you
>>think it will be a CLA or a circuit board mod or a new circuit board?
>>Any other ideas?
>>
>
> To repeat my post about Walt's similar problem:
>
> Walt Wayman wrote:
>
>
>>Louie is 20 years old and has never been to the doctor, so unless somebody
>>has an easy cure, that is, one not requiring major disassembly, he's going
>>off to see John. A complete checkup and CLA should do him good anyway.
>>
>
>
> Well, I'd have his bottom off (Oh Lord, here come the comedians, duck!)
> to check out the wire to the battery compartment spring and its
> connection to same. I'd also clean out the threads on the cap and socket
> throughly. While I had the bottom off, I'd also make sure the screws
> that hold it on are clean. You can check the resistance from the threads
> the cap fits into to the body to make sure that end of the connection is
> good. The current has to go through the battery => cap => bottom plate
> => screws => camera frame. Lots of places for dirt, corrosion, etc. to
> raise the resistance - and it could be cumulative. All the other
> functions of the camera require very low currents where the voltage drop
> from a low, but not low enough, resistance is minor. It is only when the
> mirror goes up and the magnets start to operate that higher current is
> needed. And that is when the low voltage protection circuit kicks in if
> the voltage under that load is too low.
>
> Moose
>
>
>
>
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