27 Aug
2019
27 Aug
'19
5:39 p.m.
I picked up a couple of HP 5036A logic trainers today, both of which have
had goopy decaying foam come into contact on their PCBs. What's effective
at removing it? I've only ever had problems with it in locations where I
can use things such as citrus-based cleaners, but I'm a bit wary of using
those around a PCB. Is regular Dawn/water likely to work?
thanks!
Jules
27 Aug
27 Aug
8:18 p.m.
In Australia there?s this product ;
https://awareenvironmental.com.au/product/sticky-spot-goo-dissolver/
It?s citrus based but I haven?t had any bad effects on PCBs. It does affect some styrene
plastics but in general it?s safe and very effective.
If you aren?t in Aus, a similar citrus based product should work - just my experience.
David Collins
HP Computer Museum
On 28 Aug 2019, at 10:39 am, Jules Richardson via
cctalk <cctalk at classiccmp.org> wrote:
I picked up a couple of HP 5036A logic trainers today, both of which have had goopy
decaying foam come into contact on their PCBs. What's effective at removing it?
I've only ever had problems with it in locations where I can use things such as
citrus-based cleaners, but I'm a bit wary of using those around a PCB. Is regular
Dawn/water likely to work?
thanks!
Jules
8:38 p.m.
On 8/27/19 8:18 PM, David Collins via cctalk wrote:
In Australia there?s this product ;
https://awareenvironmental.com.au/product/sticky-spot-goo-dissolver/
It?s citrus based but I haven?t had any bad effects on PCBs. It does affect some styrene
plastics but in general it?s safe and very effective.
If you aren?t in Aus, a similar citrus based product should work - just my experience.
I'd probably just use 91% isopropanol. No water to speak of, doesn't
bother plastics--and cheap.
If this were the 1970s, I'd suggest Freon TF.
--Chuck
28 Aug
28 Aug
4:44 a.m.
On 8/27/19 10:38 PM, Chuck Guzis via cctalk wrote:
I'd probably just use 91% isopropanol. No water
to speak of, doesn't
bother plastics--and cheap.
I do normally use it on boards for general cleaning - I was just assuming
that this nasty sticky foam would be too much for it. I'll give it a go,
though...
J.
9:32 a.m.
I'm with Chuck on this one, I've use 91% on the foam gunk and it has worked. A
similar product in the US is called GooGone. It can remove stenciled part labels and
attacks some plastic.
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Jules Richardson via
cctalk <cctalk at classiccmp.org>
Sent: Wednesday, August 28, 2019 4:44 AM
To: cctalk at classiccmp.org <cctalk at classiccmp.org>
Subject: Re: Decaying foam on PCBs
On 8/27/19 10:38 PM, Chuck Guzis via cctalk wrote:
I'd probably just use 91% isopropanol. No water
to speak of, doesn't
bother plastics--and cheap.
I do normally use it on boards for general cleaning - I was just assuming
that this nasty sticky foam would be too much for it. I'll give it a go,
though...
J.
1715
days inactive
1715
days old
4 comments
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