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« on: May 15, 2017, 07:32:25 PM »
Aravind298
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Hi everyone! I just blew my ESC by just connecting the battery to it in the reverse order.
The ESC was 'Emax 30A BLheli with BEC' .
I opened the case and came to know that the reverse polarity protection diode(honestly I don't what that is) had fried.No injuries Tongue on the main ICs were observed.
The yellow colored IC was blown.

Now,my question is , will it help if I change that yellow IC and it's neighbor? If so,please mention it's name so that I could buy it.

Thanks for helping Smiley
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« Reply #1 on: May 15, 2017, 07:40:49 PM »
Aravind298
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This is the image.
IMG_20170515_192232__1494857152_122.174.58.171.jpg
Re: ESC blown!
* IMG_20170515_192232__1494857152_122.174.58.171.jpg (26.76 KB, 400x300 - viewed 403 times.)
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« Reply #2 on: May 15, 2017, 07:47:37 PM »
Swapnil
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Retreat, Hell!
I'd recommend buying another one. Repairing an ESC is risky business.
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« Reply #3 on: May 15, 2017, 07:49:26 PM »
Aravind298
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Quote from: Swapnil on May 15, 2017, 07:47:37 PM
I'd recommend buying another one. Repairing an ESC is risky business.

Just throw that away?? That would be a lot of wastage of resources man! I can solder pretty much decently.
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« Reply #4 on: May 15, 2017, 10:02:23 PM »
A_Qaiser
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If only the protection diode is blown, then you can short circuit it. THE ESC will work fine.
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« Reply #5 on: May 15, 2017, 10:19:42 PM »
kiran rc
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That's not a diode, it a 'tantalum capacitor' however,the value cannot be known. In most cases regulator or other IC might have been burnt.
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« Reply #6 on: May 15, 2017, 10:22:43 PM »
kiran rc
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Can you post a pic of the other side of that? I suspect a burnt mosfet!
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« Reply #7 on: May 15, 2017, 10:23:14 PM »
Aravind298
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Quote from: A_Qaiser on May 15, 2017, 10:02:23 PM
If only the protection diode is blown, then you can short circuit it. THE ESC will work fine.
You mean to say,just unsolder it off the board and put a wire on it?You might also see it's neighbor suffer the same fate.
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« Reply #8 on: May 15, 2017, 10:23:44 PM »
Aravind298
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Quote from: kiran rc on May 15, 2017, 10:22:43 PM
Can you post a pic of the other side of that? I suspect a burnt mosfet!
The other side is perfect.I would show you if you want.
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« Reply #9 on: May 15, 2017, 10:36:17 PM »
kiran rc
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Ok. Not a problem. You may test it again if capacitor is the only component damaged.It can work without the cap, you can add it later if the esc is working.
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« Reply #10 on: May 15, 2017, 10:51:07 PM »
kiran rc
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Quote
You mean to say,just unsolder it off the board and put a wire on it?You might also see it's neighbor suffer the same fate.
Just unsolder. Don't put a wire junction to it! The main IC will blow. The two ends of the component are of different polarity.
Can't identify any other component burnt beside that one. Maybe a higher resolution  pic will help.
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« Reply #11 on: May 15, 2017, 11:38:03 PM »
Aravind298
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Quote from: kiran rc on May 15, 2017, 10:51:07 PM
Quote
You mean to say,just unsolder it off the board and put a wire on it?You might also see it's neighbor suffer the same fate.
Just unsolder. Don't put a wire junction to it! The main IC will blow. The two ends of the component are of different polarity.
Can't identify any other component burnt beside that one. Maybe a higher resolution  pic will help.

Hi,I really want to put up a better picture,but the website just doesn't allow me. Tongue
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« Reply #12 on: May 17, 2017, 08:19:22 AM »
kartp3112
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Now whos next??
You can desolder everything (Fets, IC, Caps, Diodes) and buy a new one of the same make.
In case you blow a fet on the new one, just replace it with a fet on the old one (that way you wouldnt be destroying resources).
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« Reply #13 on: May 17, 2017, 09:17:01 AM »
Aravind298
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Quote from: kartp3112 on May 17, 2017, 08:19:22 AM
You can desolder everything (Fets, IC, Caps, Diodes) and buy a new one of the same make.
In case you blow a fet on the new one, just replace it with a fet on the old one (that way you wouldnt be destroying resources).

Clap Clap Clap
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« Reply #14 on: May 17, 2017, 10:44:27 AM »
rastsaurabh
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Hello Aravind,

The pic shows that PCB tracks also might have blown..... As all are suggesting buy a new one. Its not that you cannot repair ESC but the problem is reverse polarity is a killing mistake & you cannot ascertain what all can go wrong.

On the other side I had a faulty Motor because of which 2 of my ESCs have MOSFETs blown. I ordered CED85A3/CEU85A3 Mosfet but they were of bad quality ... the ESCs worked but on full throttle one Mosfet blew off.

Question : where to get CED85A3/CEU85A3 mosfets?

regds
Saurabh 8826298725
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