Fried My 9920!!!
 

basicly heres wut happened. I altered my lisaver so that the the wires woudl only connect to one batt, instead of both of them together. The guy who i bought the lisaver form said thats why it went in reverse instead of stopping the car. When i pluged in one of the packs, a puff of smoke came out of the esc. I instantly remove it and looked at teh controller. I took some pics of it. Seems liek the brown wiere was loose, u can see it popping from teh side. That is what i beleive coudl have been it. Or it coudl have been cuz i put the lisaver to one of teh batts. Heres a diagram

____(LiSAVER)__
l
ESC-l____(lipo)

Heres the pic, Is it savable? Could i just resolder the wire back on and have it running again? Please tell my my esc isnt fried! This is bullsh**! Outta my 4 brushless escs i ever had, 2 of them broke! WTF! :035: Its my freaking 2nd broken 9920!
http://img.photobucket.com/albums/v7...h_IMG_0008.jpg
http://img.photobucket.com/albums/v7...h_IMG_0006.jpg
http://img.photobucket.com/albums/v7...h_IMG_0005.jpg

Come on guyS! is it salvagable? if not, i wanan grab that 9920 deal from miek before its to late

It's really hard to say. Usually, when there is a puff of smoke and lifted traces like in your pic, it usually takes out something else and it's difficult to determine what unless you know how to troubleshoot electronics.

Wow, nbcaz, you really have the worst luck!

That sucks man, IMO take advantage of the holiday specials. I see one solution to your bad luck ; TAKE YOUR TIME! Every time i see you post your either in a rush or you just want it to work. If you take some time and do things right first ; you will have a happy smile on your face. Im not saying this caused you 9920 to go up in smokes but ive seen a bit of things you've rushed. For instance ; You cardboard battery holders in your revo ; that was humerous, i have to say :) ;)

I Can Top That
 

I WOULD HAVE BEEN BETTER OF JUST DRIVING MY TRUCK INTO THE OCEAN.
then only the electronics would be shot
I was ripping sand runs at the beach today when I SLAMMED into a unseen small concrete small devistating sorta hidden concrete block about 40 yards away. SEVERE IMPACT. 20 to 30 MPH EST
DAMAGE
New Era ext CHASSIS bent mid length
TRAXXAS SHIFT SERVO DESTROYED
EXPENSIVE STEERING SERVO DESTROYED
2 5S APACHEE PACKS / PUNCTURED
GORILLA STRAPS BOTH TORN
SCREWS SHIERED ONE GREAT ASSEMBLY FRONT BULK
QUARK 125B DOES NOT TURN ON
FIEGO 9XL BOTH ENDS CAME OFF BUT I think it will still work

CAN ANTONE--TOP THAT just GOT the car ripping too

Doesn't look to bad to me. Just lose contacts. If your good (and I mean good!) at soldering, try removing the wires and seeing how bad the damage is, then solder them back on indiviually and seperate.

take a old DRY toothbrush and gently clean that area off and see what it looks like.....maybe something got in there and shorted across everything....

The reason for reverse was it was a plane lisaver.
The reason for the smoke was you hooked the lisaver up wrong.
I hope this helps.
I think you may want to invest in esc while sale is on.

Hey, you could clean up the area...and being extra carefull...you could resolder the black wire on...and change the wiring back to the way it was on the lipo saver and give a shot again....it wouldn't hurt to try

Well, thats the way they sell the lisavers on RCM, with the little deans extention. Thats how i set mine up. Before i had one RED wire on one pack, adn the black wire on the other.

so with the little deans ext on it...it worked fine.....but when you wired a red wire to red wire and like wise with the black....it fried....hmmm
i cut the connector of mine as well & wired it in that way to......now im a little worried

I just tested mine with it wired ....without the deans connector....ans the red wire goint to the + battery wire off of controler and the black giong to the -on the controller as well...and it all worked just fine...no problems at all.....so are you sure you didn't wire it on wrong or something?

That shouldnt have been the problem, since i doubt the deans connector would lose some kind of interference, and Shayne's (sjcrss) works. I bet you put the wrong polarities together.

and that was with my 7 cell NIMH packs to.....so i think a polarity might have gotten switched or something and it backfed the juice to your controller

Did you have one pack or two packs on the esc with the lvc?
Was the lvc wired with one lipo or two?

I'm sorry to hear that man. I know how that feels. Are you sure the polarity was correct?


JB

i dont think its the lisaver at all. I think its the lose wire on the ESC board. Wierd thing is taht the hitec connector, has a melted black part.

clean it up, and reconnect hte loose why...what do you have to loose.....just be real carefull is all

I have only one pack at taht time. Heres the thing, i connected teh lipo to teh NON LVC pack side,and POOF! Should i have connected the LVC to the LISaver side?

Do you have a pic of how you had the lvc and lipo hooked up?
If you hooked it up a certain way. You did it.
If you hooked it up another it is another problem.

http://img.photobucket.com/albums/v7...h_IMG_0010.jpg
http://img.photobucket.com/albums/v7...h_IMG_0009.jpg

here ya go, dont make much sense how it could fry when tehre is no complete circuit.

If that's exactly how you had it wired, it looks like the LVC was "trying" to complete the circuit. Basically, the ESC was pulling current through the LVC instead of it being across a battery. This might have blown something and placed the pack voltage at the output of the ESCs BEC through the LVC's throttle line. Depending on the regulator, you could have gotten current flowing backwards through the BEC causing it to pull a lot of current.

Well now!
If my thinking is correct. The bec internal is hooked to the batteries ground or neg wire. With you hooking the lvc on that side. You accually shorterd the
battery out thru it. If you had hooked it on the other wire it would have been
better. It won't read a lvc on all the packs though. You completed the circuit
and fried the esc. The esc was completeing the circuit with the lvc.

The way i see it. You made a smoke boom with that wiring.

I looked at your pics...and it looks like you got your 9920 rec wire plugged in wrong..going into the LVC....the brown wire is suppose to line up to the black on the lvc.....it looks like it is lined up to the white....( and yes you can plug it in wrong....cause i tried it myself)......if it is this would cause the lvc to send the wrong polarity thru the rx lead....

i dont think i screwed up teh lvc to esc wiring, i took everything appart and placed them roughly together, so i could have overlooked that.

wait, so it would WORK if i hooked it up that way!

No, with the Y adapter as shown here you can't make it work. the LVC is used as a connector to make the circuit closed. hook the LVC connector to the Y adapter on the controller, than put a close bridge on the other side of the connector that is over on the controller (DO NOT put a bridge onto the LVC device)

just hook up the batteries to the LVC and it should work the way it's meant to work.

My BEC and Wiring Info page shows you how to wire an LVC. Just choose the right options...

I would much rather wire it in to read all the batts.

I was talking about it wouldn't have smoked.
You hooked everything up to a common ground and put a hot wire to that.

the guy who sold me the lvc siad put the li-saver wires behind the same deans!!!!!! :mad:1 :mad:1 :mad:1 :mad:1 :mad:1 Funhny thing is that he says the my lisaver went reverse cuz i wired wrong, when in fact, i wired it the exact way the link said i should ahve. so he tells me to wire it differently, whcih led to my broekn 9920

You shouldn't listen to rookies.

i wont name names, but this "ROOKIE" use to supply allot of items to u guys.

That may be why he used to supply parts. :D

come on name names for us..
phil

My guess would be finedesign rc....

nope, but honestly, whose fault do u think it is?

you talking about Jamie? need names bro
phil