Any electronic guys in the house?

Jabroni

Jabroni

Well-Known Member
Supporting Member
Multi-Factor Enabled
Joined
Mar 4, 2017
Messages
1,844
Location
Purlear, NC
Rating - 100%
30   0   0
I got a project of swapping caps on an amp for my speakers (Definitive Technology 7004..new amps no longer made and I got some hum tha require a cap swap).

The problem I have is getting that awful yellow/brown glue used to secure components to the pcb..they managed to glob a ton of it on the pcb to the metal mounting plate and of course i need to seperate the two to access said caps.

I tried using lacquer thinner on a q-tip to see if thatd help dissolve it, but no luck.

Whats a good and safe way to remove this crap?
 
The best method I've heard of is to freeze it and chip it off. Cold breaks the adhesion layer. But whatever you do it's probably gonna be messy/risky.
 
I put the tip of an awl under the cap between the two leads and carefully pry / walk it out while heating the contacts on the other side. To hell fighting with that stuff, I just leave it in place.

I've always wondered if you could take a can of duster, turn it upside down, spray that shit, and it freeze it enough to chip off, but never tried it.
 
yard mongrel said:
I've always wondered if you could take a can of duster, turn it upside down, spray that shit, and it freeze it enough to chip off, but never tried it.
Click to expand...

It probably depends on how thick the goo is. If there's too much material, the canned air would likely only freeze the outermost layers.
 
Found a product called "Dissolve" that softens epoxy and acrylic adhesives. It worked like a boss to loosen it up amd get chunks off. I used a chisel type blade exacto knife to help coax it off the amp mounting plate and got the board off cleanly. What a pain!
Now the fun part of removing 6 caps, 4 of which are small, then seeing if its all good.
 
You must log in or register to reply here.
Back
Top Bottom