There are a lot of hidden solder connections on the 4 circuit, especially
where the circuit is folded back on itself so it will fit under the top
cover. There's also a circuit mounted on the shutter, directly behind
the self timer LED.
John
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----- Original Message -----
From: Motor Sport Visions Photography <msvphoto@xxxxxxxxxxx>
To: <chipstrat@xxxxxxxxx>; <olympus@xxxxxxxxxxxxxxx>
Sent: Tuesday, September 21, 1999 1:56 PM
Subject: Re: [OM] OM4T that took a salt bath - update (kinda long)
> In a message dated 9/20/1999 Chip Stratton <chipstrat@xxxxxxxxx> writes:
>
> << I am wondering if it would be worthwhile to take the
> top and/or botton plate off for some judicious
> application of electrical grade silicone to electrical
> parts that appear to be at risk for continued
> corrosion, but lack a guide to doing this for the
> OM4t. Perhaps another outfit would do this for me,
> with no guarantees of course. >>
>
> I know that John may be the best qualified to comment on this. That
> said, I can give some limited advice based on my own technical
> expertise/experience. No, I am not a camera technician. What I have done
> for the past 20+ years as my "day job" is consumer electronic repair
> which does include vast training and experience on video cameras so I
> think I can safely comment on the electronics side of this question.
>
>
> In my places of employment I too would (and have many times) declare
> *any* salt water damaged piece of equipment non repairable. (In most
> cases fresh water too actually.)
>
> If the unfortunate victim were my camera I may take a stab at cleaning
> up the soldering before corrosion set in badly. I would do this only
> with the amount of experience I have in working with miniature and
> delicate surface mount device PC boards though, I don't recommend you
> try this unless you have some solid technical background and experience.
> The corrosion worries are not so much in the solder connections (as they
> can be redone relatively easily) but more so in the PC board (flexible
> with very thing foils I assume) foils and the electronic components
> themselves. Use of cleaners, grease, etc. will *not* slow the corrosion
> damage once it has set in IMO.
>
> I guess what I am saying is leave well enough alone and use the body
> 'till it dies. You may get lucky and it could go a while, or it may go
> tomorrow. Kind of a crap shoot I fear. The other option would be to sell
> it really cheap as a parts camera and be done with it. This list or eBay
> would be good places to do that I imagine.
>
> I hope this helps some. Even with my technical background and experience
> I have not yet opened up a functional still camera. I have wanted to
> learn more about it for many years, and may yet in this lifetime. For
> now if one of my OMs needs help it will go to a professional like John.
>
> Mike Veglia
> Motor Sport Visions Photography
> www.motorsportvisions.com
>
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