Replacing Quark's fried brains... - RC-Monster Forums

zeropointbug · **Replacing Quark's fried brains... -** 10.18.2007, 06:07 PM

Hey guys, you may know that my wicked Quark had been murdered on me in action... long story short, I remembered that I have spare Quark brain board that came off my DOD Quark from S&T. I just hope that it is still good, and if the fire fury did not damage any of the IC's.

I did buy a Quark from AAngel, which is in transit, but it would be very nice if I could get this Quark to run again.

The only thing is that I have never actually DE-soldered connections like this, so anyone's help with that would be greatly appreciated.

Note how there was a short circuit from the brain board onto the cap buss bar, a good amount of solder was melted in the process... and I can tell you that I took a good amount of heat from a 250watt iron to melt solder on that buss bar. It must have been quite the nasty short, yet my batteries are still alive, thankfully, I just hope their performance has not been compromised.

zeropointbug · 10.18.2007, 06:09 PM

Here are pics of the replacement brains (hopefully). There is some burning FET residue caked into the three phase controllers there, hopefully it did not damage them from heat.

sikeston34m · 10.18.2007, 06:15 PM

Hey ZP. I hope you can get your controller going again. That sure was an awesome setup.

On the brain board, I think I would see if I could clean off that fet "residue". That stuff is probably conductive and could give you problems even if the underlying components are good.

Good Luck with this project.

zeropointbug · 10.18.2007, 10:58 PM

Yeah, I wonder how I could get the residue off, i agree that it could be slightly conductive and/or capacitive.

Can anyone give me some insight on how to de-solder the 4 soldered joints at the motor out end of the board?

sikeston34m · 10.18.2007, 11:18 PM

Aaah now I see where you're talking about on the desoldering.

Get some Desoldering braid from Radio Shack. It's pretty handy stuff.

http://www.radioshack.com/product/in...entPage=search

Once you have the solder removed it should come apart rather easily for you.

I hope this helps. Good Luck.

zeropointbug · 10.18.2007, 11:23 PM

Okay, that should work great. Thanks for the help!