Hi. I'm with this CDP-701ES. It has a lot of fails and bad attempts of repair. A long history. Now it works, and I hope this cd player can help me to repair and adjust OPH-31, 32, and etc... laser pickups.
Well, the problem. There is a Low Pass filter with a OP-AMP that makes a pop-pops sound. I've opened and cleaned of rubber, but there is a hard resint that is very hard to remove.
I've proved acetone, paint disolvent, nitro disolvent, alcohol, gasoline, air hot(with care), and nothing.
So, what can disolver this resin?
Best regards
Shared album - José Manuel Morales Hernández - Google Photos
Shared album - José Manuel Morales Hernández - Google Photos
Well, the problem. There is a Low Pass filter with a OP-AMP that makes a pop-pops sound. I've opened and cleaned of rubber, but there is a hard resint that is very hard to remove.
I've proved acetone, paint disolvent, nitro disolvent, alcohol, gasoline, air hot(with care), and nothing.
So, what can disolver this resin?
Best regards
Shared album - José Manuel Morales Hernández - Google Photos
Shared album - José Manuel Morales Hernández - Google Photos
Probably epoxy potting compound - if its a heavily cross-linked thermosetting resin it won't be soluable in anything and will not melt before charring. Sometimes a thermoset material will swell slowly in solvent until it softens, but this might be very slow as the solvent has to diffuse through the solid.