By lockup, do you mean mirror up, shutter OPEN, or mirror up, curtain
pattern showing, shutter NOT open? Either one has its own set of causes.
John Hermanson
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----- Original Message -----
From: <john@xxxxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, February 08, 2001 5:04 PM
Subject: Re: [OM] Shutter lock up in auto mode on OM-2N
On Mon, 5 Feb 2001 14:22:29 -0600, Joel wrote:
>I am enjoying my new OM-2N, though I sometimes forget about using auto
mode.
>It works great in manual mode and I keep having to remind myself it's not
an
>OM-1.
>
>Anyway, every now and then my first shot in auto mode locks up the shutter.
>The batteries are brand spanking new and a flip of the switch to reset
(while
>cursing) resolves the lockup.
>
>Since the camera has been flawless in manual mode, I'm assuming the
occasional
>lock up in auto indicates the magnet might be a little sticky. Is this
likely?
It may well be the 'ASA resistor' under the exposure compensation dial
that's dirty. It can be 'wiped clean', at least temporarily, by
working the compensation dial back and forth a few times before the
firts shot. If that seems to cure it, that's what it is!
An open, or high resistance, contact here has the effect of making the
comparator circuit think the film speed is something like 0.001 ASA
(!) and tries to expose accordingly. This *only* happens on Auto, it
has no effect on manual shutter speeds.
It's happened to me with a couple of 2n's. BTW when the same happens
on a 2SP, it goes the other way (i.e. abnormally short exposure).
Regards
John Gruffydd (Mold, Wales, UK)
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