<Techniques/Skills> Goop Removal Recipes?

How do you trace a circuit from a stompbox you have? How to remove that ugly goop in your boutique stomper? All secrets are releaved here...

Postby modman » 11 Jan 2008, 21:50

some tips sent to me in a private message:

He suggested several chemicals that may work.
This is what he suggested:

- Gasoline; diluted with hydrogen peroxide in a 2 to 1 ratio. It must be applied carefully and of course it is a flammability hazard while working with, but it will cut into any petroleum-based goop with good efficacy and if you're careful, damage to the components will be minimal.

- Acetone; can easily cut into epoxy based goops, but it also will melt and destroy most plastics very easily. Damage to the components may be severe if extreme caution isn't taken.

- Trichloroethylene; known in the industry by nicknames such as, Trike, TCE, and Tri. He recommends this as the best chemical solvent to use on goop. It can remove the goop cleanly with little to no damage to the components. It evaporates very quickly, so there is a minimal chance of melting any plastics. The only problem is that it is highly toxic and a known carcinogen, therefore, proper protection is mandatory for anyone using it.

Also try a little bit of denatured alcohol on it, to test it's reaction to mild solvents, to try and better determine what might be the best stuff to use on it. He made a point of saying that Non-Destructive degooping is very difficult and a rather rare practice in professional reverse engineering. When a device is dissected, it usually isn't their intention for it to ever function again.
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)
User avatar
modman
a d m i n
 
Posts: 4254
Joined: 19 Jun 2007, 17:57
Has thanked: 2905 times
Have thanks: 509 times

Re: <Techniques/Skills> Goop Removal Recipes?

Postby whammy » 09 Mar 2008, 06:39

Acetone is great for a final clean of the board once the components are gone IF you decide to remove them.
It's common for the markings to be removed by the builder, or by the degooping process, so I like to remove and test everything.
whammy
Degoop Doctor
 
Posts: 40
Joined: 06 Mar 2008, 10:56
Has thanked: 0 time
Have thanks: 0 time

Re: <Techniques/Skills> Goop Removal Recipes?

Postby analogguru » 22 Mar 2008, 07:10

someone already seems to have put a gooped device under x-ray´s... the result looks like this:
http://www.repairfaq.org/sam/cu2214tm.jpg

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3286
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 113 times

Re: <Techniques/Skills> Goop Removal Recipes?

Postby modman » 22 Mar 2008, 12:07

"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)
User avatar
modman
a d m i n
 
Posts: 4254
Joined: 19 Jun 2007, 17:57
Has thanked: 2905 times
Have thanks: 509 times

Re: <Techniques/Skills> Goop Removal Recipes?

Postby analogguru » 22 Mar 2008, 12:51

I wondered about that earlier, did you build yours already?

I am still working on my tutorial:

"How can I use my Marshall-amp as a private x-ray ?"

and

"How to improve the picture quality by better guitar-playing-skills."

:lol:

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3286
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 113 times

Re: <Techniques/Skills> Goop Removal Recipes?

Postby chicago_mike » 14 Apr 2009, 23:48

Hey guys!!!


The "goop" is most likely Epoxy Coating from MG chemicals.

Heres how to get rid of it....put the board in a toaster oven. hang it inside the oven say, upside down so the epoxy melts off the pcb. Parts will be okay. My bro and I have done this on some expensive computer (non commercial) boards at an old job.
Skyline FX 2013
User avatar
chicago_mike
Opamp Operator
 
Posts: 1711
Joined: 03 Jul 2008, 05:38
Has thanked: 23 times
Have thanks: 276 times

Previous

Return to Hacking, Tracing & Degooping

Who is online

Users browsing this forum: No registered users and 4 guests