Smoked 9920
 

I finally got my gmaxx running this week and got somewhere around 10 runs on it. The 8xl+9920 was doing great nothing was getting over 130* good power on anything from 12-16 cells. Until today. I was playing around in the street with it normally the road rages spin bad on my street but for some reason they hooked one time and it flipped over backwards pretty hard and tons of pink smoke started poring out. When I got to it one of the batteries had been thrown out and broken a solder joint on a battery bar. The cells are glued together so it was still making contact. Any ideals on why it died? Every joint was shrink wrapped with nothing exposed to short the esc was zip tied on a 1/2" piece of foam to protect the bottom.

Did your batteries short out to the chassis or something?

I guess it’s possible they did while coming loose but when I got to the truck it was on its roof and the pack that was loose was sitting in the roof not shorting on anything. The other pack hadn’t moved. There are no burn marks on the chassis to indicate that they did tho.

Where did the smoke come from? I dont understand why pink smoke would come from the battery or esc???

Yeah, smoke from burnt components is usually a normal grayish color. Pink smoke sounds like there's some other chemical was present. Are you sure it was pink and not some trick of sunlight or something?

Did you look at my pics? The esc is what was smoking only the esc is damaged. The color of the smoke doesn’t matter I just mentioned it because it was kinda cool to see pink smoke poring from my emaxx.

If nothing shorted out and esc burned out by it self it may be covered by warranty?? I would tell BK about the pink smoke.

How old is your 9920? On the one I have all the wires and capacitors terminate on the same end and in your pictures I can't see any capacitors or your negative lead. On that topic how do your capacitor look? Are they bulging out the ends at all?

Yeah, I saw the pics and it's obvious the ESC burnt. The color thing was weird that's all. I hate the unexplained. :)

Exact thing happend to my 9920, cost 80 euros/90$? to get fixed (was still under warrenty).

I blew up a tekin 420g2 once, lots of green smoke came out. I guess its just something in the controller that burns a funny colour (maybe the heatshrink?)

Isn't it strange that all the 9920s that have smoked recently all have 2 caps...

This one has got no caps.. What happened to them?

that is not warranty, for that money they can have a new one made. did you payed already?

I thought something looked funny. Where is the capacitor?

lol, u guys just noticed that? I assumed he removed them so u can see the burnt spot easier

My guess is that they became unsoldered from the heat.

Yea.. couldve been.....

Yes the 2 caps the neg wire and what I believe to be an inductor all came off from the heat. I got the esc about two or three weeks ago from here. The caps are fine a little burned from the fire but the ends are still flat.

If he did it could viod the warranty.

NBCAZN. Did you use the spell check?

I think he did, he sounds so much more sufisticated now, i like the new and improved nbcaz!!!:)

were you running a reciever pack or a ubec?

He didnt state any yet..... He was probably running a UBEC.

I was running a rx pack.

oh ok:p Were the batteries fully charged or not?

The pack was charged sometime last week. I just cycled it on my Duratrax ICE on a 2A discharge it still had a little over 600mah in it. Its a 1100mah pack.

Ok, hmmm, i dont know if that wouldve caused the problem. But i think you shorted out somthing in there. OR maybe its just a faulty controller.

I personally think When the battery disconnected, the connector must have touched something that conducts eg metal and shorted the circuit, are you running a gorilla/supermaxx chassis?