There are 4-5 movements synchronized together, some of them under the
circuit, which all must be precisely adjusted to prevent mirror lock. Most
shops, unless they're factory trained wouldn't know about these adjustments
and you MUST if you're to eliminate mirror/shutter lock. Its not enough
just to bent the crap out of the levers until the camera fires without
batteries (which some shops do).
John
paul haigney wrote:
> John Hermanson wrote:
>
> > There are probably 10-12 things that cause mirror lockup (shutter
> > lock), too
> > many to go into here. You could need a new circuit, but that isn't
> > very
> > common (circuit failure that is).
> >
> > John
> >
> > Hi John
>
> I did follow your help mail ..re: removing the floor of the mirror box
> and I seen the gold plated switches they looked very clean.However I
> watched the movement as I took a snap and this is what happend.1/ When
> the mirror returns as normal .....a small black cylinder shape part 3mm
> high moves to the right causing one gold contact to touch another,this
> process happens in reverse as the mirror returns to it's possition.
>
> BUT
>
> 2/ When the mirror locks up....the first part of the process takes place
> as normal ..ie the black cylinder moves to the right causing two gold
> contacts to touch...BUT stops right there and does not return and so the
> mirror stays up.
>
> Putting the top leaver to reset/check drops the mirror back as does
> setting the shutter ring to B.
>
> all of the above is a front view.
>
> I would be interested in your comments on this John.
>
> Rgds Paul Haigney
> Dublin........IRELAND
>
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