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Cleaning a Circui board, Warning big pics

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Capt Fiero View Drop Down
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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Topic: Cleaning a Circui board, Warning big pics
    Posted: 16 January 2011 at 6:47pm


I need some help from the guys that remember the days when circuit board repair was the norm rather than simply garbaging and buying the newest model.     My radar detector was working fine one day and dead the next.  It’s about 8 years old and was wired into my car so that if the car was on, it was on.  LOL, usually the safest practice for me was to always use it.  Even with its age it worked really good.  Better than many newer models I have seen.

Well so she died and I took it apart to see what the deal was and I was greeted with this……          I’d like to try cleaning the board and see if maybe I am lucky and the corrosion has just finally gotten to be enough to short a trace or something like that.   I know it has been submitted to the high humidly we have on the west coast and heated and cooled a lot. 

So you got any suggestions on how to clean her up.      The unit itself is not expensive anymore, I paid something like $200 for it when I bought it, however I checked eBay and used ones of the same model are only about 40 bucks now.   However it has been perfect and I love it, so I would like to keep it.

Here are some high res shots I grabbed with my digital camera.   I know it looks bad, really bad, but hey, its apart on my bench now, and it will only take a min to put it back together, so I'd like to know what is the best stuff to use to clean it.    I do have some electrical contact cleaner here that I use on stuff like ECM plugs and such in the Fiero, would that be safe to use on the bare board?

Be prepared to look away at first glance as it does look horrible. 

Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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Dawg View Drop Down
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Post Options Post Options   Quote Dawg Quote  Post ReplyReply Direct Link To This Post Posted: 16 January 2011 at 8:51pm
Hmmmm....It's almost like that one chip lost all it's magical goo.  I would start with rubbing alcohol and then if that didn't work then carefully try acetone and lastly lacquer thinner.

If you manage to get it working, spray a bit of clear lacquer over the board after it's all cleaned up. This will help stop this from happening again.

The Dawg
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CFoss View Drop Down
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Post Options Post Options   Quote CFoss Quote  Post ReplyReply Direct Link To This Post Posted: 16 January 2011 at 9:35pm
Yuck!

Stiff bristled brush and isopropyl is what I use on my boards.


Chay
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Post Options Post Options   Quote kharmata Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2011 at 11:46am
Originally posted by CFoss CFoss wrote:

Yuck!Stiff bristled brush and isopropyl is
what I use on my boards.Chay
and old tooth brush always works good for me.
keep the wave guide covered. don't want any crudd in
there.
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Capt Fiero View Drop Down
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Post Options Post Options   Quote Capt Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2011 at 12:59pm

 

Well I used an old toothbrush and lots of 2 diffrent kinds of cleaners one for contacts and one that is specifically for cleaning circut boards.

I just want to thank everyone that posted and replied with suggestions.

I cleaned it about 4 times, each time spraying off all the stuff from the previous clean and starting over.


Here is the final clean


and the final result.

http://www.captfiero.com/circutboard/result.avi

WooHoo, it works and I am safe to go driving again.

Oh for the record its a Whistler 1650 detector.

Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.
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Romeo View Drop Down
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Post Options Post Options   Quote Romeo Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2011 at 1:07pm
Originally posted by CFoss CFoss wrote:

Yuck!

Stiff bristled brush and isopropyl is what I use on my boards.


Chay

Do it quicker: Go for liquor.
Never shift into reverse without a back-up plan.
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Post Options Post Options   Quote Graeme Quote  Post ReplyReply Direct Link To This Post Posted: 17 January 2011 at 3:12pm
amazing.. I thought for sure it would be toast.
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Post Options Post Options   Quote beken Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2011 at 10:54am
Wow...that's a great job. I need to try this on the circuit board in my gauge cluster.



Beken (aka Ken) - bekentech@westcoastfieros.com   Original and still the owner of an 85SE 2M6 4spd
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Dr.Fiero View Drop Down
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Post Options Post Options   Quote Dr.Fiero Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2011 at 5:41pm
Originally posted by beken beken wrote:

Wow...that's a great job. I need to try this on the circuit board in my gauge cluster.


Gotta be ubber careful doing that - the foil traces very easily peel right off the plastic 'board'.

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