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Re: [OM] overly slow electronic shutter speeds

Subject: Re: [OM] overly slow electronic shutter speeds
From: John Hermanson <omtech@xxxxxxxxx>
Date: Tue, 27 Oct 1998 21:19:36 -0500
The ceramic board which is "printed" with the manual shutter speed resistors
is part of the main circuit.  Cleaning can relieve some of the problems.

John
http://www.zuiko.com

William Sommerwerck wrote:

> "After 20-odd years of service, my OM-2n has started acting oddly. I've
> noticed that, in manual mode, the slow shutter speeds don't always
> work properly."
>
> This is almost certainly due to a deteriorating switch. As you turn the
> switch, you select different resistors for the timing circuit. If the
> switch is making bad contact, the switch resistance will add to the
> total resistance and slow down the shutter.
>
> The faster speeds work because, presumably, you use the faster speeds
> more often and the contacts are cleaner. (This is not uncommon. I've
> seen switches deteriortate in equipment that didn't get enough use.)
>
> Cleaning the contacts would probably fix this. Be sure the repariman
> puts some sort of contact enhancer (such as Cramolin) on the switch
> after he cleans it. A complete switch replacement would be better, but I
> hate to think what it would cost.
>
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