another beautiful mmm failure!

[emaxxnitro]

another flaming bec and castle has to fix it!

[lincpimp]

Interesting, first time I have seen a MMM bec component actually look like it failed. When mine failed it just failed, nothing looked burned, bulged or overheated at all. Wonder what that part does?

[MTBikerTim]

Originally Posted by lincpimp

Interesting, first time I have seen a MMM bec component actually look like it failed. When mine failed it just failed, nothing looked burned, bulged or overheated at all. Wonder what that part does?

I'm pretty sure one of mine would have looked like that. After it failed I kept flicking it on and off and unplugging and plugging it back in and then I heard a pop.

[emaxxnitro]

it was smoking so im sure it was a little fire

[Semi Pro]

that sucks

[Sammus]

add it to the data thread (top sticky). Aren't those two little IC's part of the BEC circuit? I cbf finding the pic, but I'm pretty sure they were circled in the BrianG mod thread :P

[brushlessboy16]

well now we know whats going wrong, how to counter it..

Originally Posted by brushlessboy16

well now we know whats going wrong, how to counter it..

Wowwwwwww!!!! this is ONE of the multiple things going wrong, this is not the single one

[Sammus]

What else is going wrong? this looks like BEC, and BEC is all I've heard so far (apart from the one in a million fireball which happens with any esc and is totally unrelated to the high failure rate)

[George16]

Those are the 2 components removed on Brian's mod.

[BrianG]

If I am not mistaken, that is one of the main switching FETs. Since they can handle a fair bit of current, it makes me wonder if you had a short somewhere along the 6v line, a servo stalled, or servo EPAs set beyond full lock.

BTW; the mod involves removing the coil (large thing), both FETs (6 pin devices), and the switcher IC (8 pin on V1, 10 pin on V2).

[myndseye]

Is it just me, or does it seem that a catastrophic failure like this one could explain why a couple of the Monsters have burned up? Even though most of them die without this type result, the fact that this type death is possible, could justify the spontaneous meltdown situation with some of the controllers.

[Sammus]

I think the meltdowns are very uncommon and not related to this bec issue at all.

That said, I wouldn't surprised if the ccbec failures and the MMM BEC failures are related.

[myndseye]

Originally Posted by Sammus

I think the meltdowns are very uncommon and not related to this bec issue at all.

Maybe your right, I wouldn't want to start a whole big thing with my comment. I can see it now, how that statement that could blow this situation out of proportion.

[Helly]

Same issue here,

I run my first MMM yesterday, 10 min and just stop... 2 min after i retry to connect it and come a little white smoke,

It's the two BEC component:



The CC warranty work on stock servo and receiver who die after MMM BEC failure???