GPZ7000 repair?

[ivconic]

[ATTACH]57636[/ATTACH][ATTACH]57636[/ATTACH]
Success with removal. Tip: use of low temp solder kit (SMDKIT-1) helped!

Good job! Move on...

[pustareka]

Sekret uklanjanja epoksi smole

google say
Secret of removing epoxy resin

[bklein]

No luck

Damn, the boiling water had no effect on the resin.

[ivconic]

Damn, the boiling water had no effect on the resin.

Eventually you will have to accept the advice given by the pretty wise man hiding behind my nick... first page, post #5...
'cose... I've been walking that road already...
... so many times...

[bklein]

SMD heat gun


I tried my SMD heat gun. At 300 degrees the resin surface becomes a bit brittle. I can scrape it away with a small flat blade screwdriver but I’m very scared I’ll likely knock components off doing this.
Maybe I can use a lower temperature.
The chemical solvent approach has me scared about the hazards of the solvent. Interesting that it is what is used in Xmas bubble lights - which I have several of.

[Alexismex]

Hello Forum,
cooling and heating alternately and in addition a lot of patience, the epoxy cracks and can be easily removed

[bklein]

Wouldn’t the pcb components be at risk from the temp cycling as well?

Ivconic - I think Dichloromethane is illegal to sell in my state of California. They removed all the auto degreasers and paint removers that contained it.

[Skippy]

That doesn't surprise me. It's essentially banned in Europe, too. Popular paint-stripper 'NitroMors' used to contain it ... when they were forced to change the formula ( in 2010 ) the effectiveness dropped. Only 'professionals/specialists' stand a chance of obtaining neat dichloromethane. Then there's the carriage/postage issue: few will transport it.

[bklein]

I tried lower temperature- 250 degrees is where it starts to be useful.

I’m curious - since I have the part number for the RX module, can a dealer order it?

[Carl-NC]

I’m curious - since I have the part number for the RX module, can a dealer order it?

Almost without a doubt: No. Every part, down to every resistor and screw, has a Minelab part number but they aren't going to sell most individual parts even to a dealer. And certainly not the module.

[eclipse]

This doesnt look good. You have high temp resistant epoxy right there. If you want look for Cured Resin Remover Solvent RRS. I got a hold of it really hard. I tested it once and it didnt work for the minelabs white paint but a guy who i gave almost all of it used it on other board and he said it worked but very very slowly.

[ivconic]

Wouldn?t the pcb components be at risk from the temp cycling as well?

Ivconic - I think Dichloromethane is illegal to sell in my state of California. They removed all the auto degreasers and paint removers that contained it.

I assumed so.
It is similar here.
But there is always a solution, by chance you might find out about a man, who knows a man... who knows a man...

[ivconic]

Almost without a doubt: No. Every part, down to every resistor and screw, has a Minelab part number but they aren't going to sell most individual parts even to a dealer. And certainly not the module.

XP has a different business philosophy, they will sell you everything... by ripping you off with unbelievable prices...

[bklein]

I found a product called Attack that is an epoxy solvent. Supposedly ok in California - some is on the way to me.

[ivconic]

https://www.walmart.com/ip/Attack-Ep...over/698254695

Sounds promising!



I cannot find a detailed description of the chemical composition.
But I guess it is somewhat "weakened" dichloromethane... will do the job, but it will probably take longer for the module to sit in that stuff.
Be patient...