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Re: [OM] OM-2 battery short

Subject: Re: [OM] OM-2 battery short
From: "John Hermanson" <omtech@xxxxxxxxx>
Date: Tue, 6 Jul 1999 16:47:51 -0400
The main switch is part of the mirror mechanism and is not accessible from
the outside of the camera.

John
----------------------------------------------------------------
Camtech / Olympus Service since 1977
21 South La., Huntington NY 11743-4714
516-424-2121
http://www.zuiko.com
--------------------------------------------------------------
----- Original Message -----
From: Tom Curlee <t_curlee@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 06, 1999 3:15 PM
Subject: Re: [OM] OM-2 battery short


> John:
>
> Is the main switch linkage connected to the cocking mechanism? I can
remove
> the short from the bottom by pushing on part of the cocking linkage.
Battery
> terminal resistance to ground is dependant on whether camera is cocked or
> not.  Also, with fresh batteries, the camera will fire normally for a very
> short time until the batteries are sucked down.
>
> Can I rotate the lens mount/shutter ring assembly up and away from the
> camera body without removing the shutter string and electrical wiring?
> Unless the main switch is somehow connected directly to the cocking
linkages
> I still think I'll need to get futher into the camera body to find the
> short, which seems to be just under the lens mount flange.
>
> Thanks, Tom
>
>
> >From: "John Hermanson" <omtech@xxxxxxxxx>
> >Reply-To: olympus@xxxxxxxxxxxxxxx
> >To: <olympus@xxxxxxxxxxxxxxx>
> >Subject: Re: [OM] OM-2 battery short
> >Date: Tue, 6 Jul 1999 09:35:32 -0400
> >
> >Sounds like the main switch is shorted.
> >
> >John
> >----------------------------------------------------------------
> >Camtech / Olympus Service since 1977
> >21 South La., Huntington NY 11743-4714
> >516-424-2121
> >http://www.zuiko.com
> >--------------------------------------------------------------
> >----- Original Message -----
> >From: Tom Curlee <t_curlee@xxxxxxxxxxx>
> >To: <olympus@xxxxxxxxxxxxxxx>
> >Sent: Monday, July 05, 1999 7:51 PM
> >Subject: [OM] OM-2 battery short
> >
> >
> > > I recently picked up a clean OM-2 body super cheap.  It was sold
> >'as-is',
> > > i.e. wouldn't work.  Of course there weren't any batteries in it so I
> >was
> > > hopeful.  I put in new batteries and it worked perfectly, but then
> >wouldn't
> > > work at all a few minutes later.  I pulled the batteries and found
that
> > > there was a .25 Amp load on the battery! Later I found that the load
> >varies
> > > between 2.5 to 5 Ohms across the battery terminals when the shutter is
> > > cocked.
> > >
> > > I (don't listen, John H. :-)) pulled off the top and bottom covers and
> > > poked, prodded, pulled, moved, etc., etc. (about 3 hours worth of
etcs.)
> >and
> > > found that the short goes from around 150 Ohms when shutter is
released
> >in
> >B
> > > to the 2.5 - 5 Ohms when shutter is cocked.  The heavy load starts
when
> >the
> > > wind lever is just barely moved.
> > >
> > > The area causing the short appears to be to the right of the lens
(when
> > > looking at the lens from the front).  From the bottom, pushing a
> >vertical
> > > linkage (part of the cocking mechanism)forward will cause the short to
> >go
> > > away (well, to about 1 MOhm), pushing the other way it goes to full
> >load.
> >I
> > > suspect that I can get to the area causing the short if I can remove
the
> > > lens mount assembly, shutter ring and all.
> > >
> > > The question is, can I peel back the leatherette covering, remove the
4
> > > mounting screws, and rotate the whole lens mount/shutter ring assembly
> >up
> > > and out (still connected) without disconnecting the shutter string and
> > > wiring?
> > >
> > > Any suggestions or info??
> > >
> > > Thanks, Tom
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________________________
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> > >
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> > >
> >
> >
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> >
> >
>
>
> _______________________________________________________________
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>
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>


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