How to break (open) electronic part that potted with resin ?

[weeyndha]

how do you break resin electronics

Dear All,

Is there any way to break (open) electronic part that potted with resin ?

rgds

 

[ME]

Alcohol is used for dissolving resin.

 

[gil]

An epoxy resin is commonly used, which can't dissolved by alcohol. I heard, that some people have used X-ray to figured out what's inside of the block. This can be risky approach, depending of the kind of circuit, and if it is sensitive to hard radiation

 

[BigBoss]

Resin that when we use to make soldering ? If it is so , Isopropil Alcohool
( Propanol ) is enough to clean.

Or if you mention "lack of resin" which is used on a PCB being as solder resist , it's much more difficult.

I heard about that there is a special solver for it but I never couldn't find. Instead of it , Carbon-tetra-clorur or Tri-clore-ethylen might be used.

Rgrds

 

[cherrytart]

i've used methyl ethel ketone to dissolve the potting on a highvoltage module, but i don't know what this does to the insulation in transformers

its pretty nasty stuff and may not be easy to get

 

[jzaghal]

Hi,

It is not easy to disolve the epoxy (resin).
If it is a small module, I would start by taking resistance measurements
and noting them. Then use a small cutter and start cutting the thing
bit by bit, being more carefull when you reach the components.

Good Luck, since you need it.

Bye.

 

[xxargs]

Re: How to break (open) electronic part that potted with res

Dear All,

Is there any way to break (open) electronic part that potted with resin ?

rgds

Not so easy...

If real resin of epoxy type, you kan try heating up module to
120 - 200 degree celsius (lower temperatur if equipment has a
elecrolyt capacitive inside - or explode...) under long time
(couple of days, weeks). The epoxy break down slowly under
heat to more or less powder.

(think long time heating expose FR4-board...)

Second methode:
Using _dry_ concentrated acetic acid,
the epoxy break down and swell (huge!) depend
of filling material in resin. But, swelling force can break
away components and break transformer...
so - good idea to mecanical take away swellng
epoxy every day (use plastic gloves and good ventilation
on this job - concetrate acetic acid are very dangorus
on unprotected skin and giving deep burning damage without
sense... is to late - concentrate sulphur acid are healty
compare to organic acid - concentrate sulphur acid burning
immediately and can fix before deeper vounds in skin ).

This metode take time - couple of weeks or so if resin
layer are thick. Acetic acid beat around 0.5-1 mm/day
on epoxy or so.

Easy test: drip dry organic acid on resin surface and see
if swelling after short time. if swelling, its resin a epoxy
type and you can using acid methode to break up unit.

- best way are dismantlig epoxy with drilling mm.
(ie use dremel or dentist drilling tool ) so much you can
before heating or organic acid solution of resin.

Very importent at organic acid are really _dry_
ie. water free, or you can recive more or less
corrision on componets in you euqipment.


If resin based on silicon or higer order plastic
- only way dismantling with drilling...