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View Full Version : Do I need a new board??


xmodcanuck
2011.10.23, 03:23 AM
I got this 02 chassis early this year from my mini-z dealer Marwan. It turned out to be my best car.
During a bit of fun racing the motor wire came un-soldered and must have touched the board. There was plenty of smoke.

My question to those who know more than me is this - Can I just replace the fets on the board or does it look like the board is completely fried??

Top view
http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried005.jpg

Bottom view - there used to be 2x2 on the bottom. One fell off.
http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried002.jpg

thestug
2011.10.23, 03:41 PM
That board looks like it is in poor shape. It is quite possible that you will need a new board. I'm not 100% sure though. Since you said there was smoke, you will definitely need new FETs.

reaper
2011.10.23, 04:14 PM
wow bud that sux
did you try powering the board back up ? if the steering and reverse still work and asumining not of the pads have lifted it may just need new fets ......heres hoping

Golddust
2011.10.23, 06:43 PM
Even if you still have steering there's hope
Power it up and try and see if you what you have
Good Luck and let us know how you make out
GD

xmodcanuck
2011.10.23, 08:01 PM
So I threw in some batteries and turned it on. No smoke....that's good. The red power light came on, the steering centered and then the light went out. No more power. Turned it off and on again, same result - momentary power then off.

What do you think?? Is the momentary red light a good sign?? I guess my worst case scenario is I go through the trouble of having someone replace the fets and the board is still dead and I possibly toast the new fets?

KA2AEV
2011.10.23, 08:32 PM
If its a 2.4 board, try rebinding it
Sounds like that should do it with the exception of needing a FET job

BTW there are a couple of guys on here that do FET replacements
Im not sure where you're located but maybe one of them will drop in

z3zinho
2011.10.24, 08:19 AM
Before having the fet's removed by someone that knows what he is doing DO NOT POWER THE BOARD!!!! The damaged fet's might be short circuiting, and you are just damaging you batteries, and possibly even aggravating the damage made to the board.

Most likely new fet's, and a litle work on those damaged pad's and you should be ok ;)

Felix2010
2011.10.24, 11:34 AM
I got this 02 chassis early this year from my mini-z dealer Marwan. It turned out to be my best car.
During a bit of fun racing the motor wire came un-soldered and must have touched the board. There was plenty of smoke.

My question to those who know more than me is this - Can I just replace the fets on the board or does it look like the board is completely fried??

Top view
http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried005.jpg

There looks (to me at least) that there might be 1 problem with an FET replacement: There is a tiny chip just above the top-side fried FET; I do not know exactly what this chip is - MOSFET controller, transistor - But you can see that this tiny chip was damaged by the exploding FET…:(

Now, I don’t know if this tiny chip is 100% necessary to the board’s function or not, but that is one more thing to consider. (You really need to look close, all the boards now have these tiny chips near/around the FET’s).

Good luck and hope you can salvage your PCB :) Highly recommend ActionB on here for FET work, check the Marketplace and maybe PM him if you’re interested… He won’t charge much to take a look at least:D

xmodcanuck
2012.05.12, 10:21 PM
Well this took me quite a while to deal with, but huge thanks to TheSteve as I now have a fixed board. And what nice work Steve does.

http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried006.jpg
http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried011.jpg
http://i474.photobucket.com/albums/rr109/xmodcanuck/ForSale/fried012.jpg

The board originally had 8858's on top of the stock 3010's, and it now has all 8858's. I do have a concern that on the top side some of the solder is a bit close to my motor wires now. Will get that looked at at my next meet. For now its back in its chassis and almost ready to go.

KA2AEV
2012.05.13, 12:24 AM
WOW Great Job!!!
Good Luck with it dude
Pedal Down!:D

TheSteve
2012.05.13, 12:46 AM
The 4 pins on each fets that are beside the motor connections are actually all connected to the motor outputs. So if the motor eyelets are very close to the legs of the fets there is no problem.