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# Broken Futaba R/C receiver

#### stef_stef

Jun 18, 2018
6
Hi everyone,

Just signed up here for some help. I have a Futaba R146iP received, that I accidental supplied higher voltage to it and I believe it was a diode that blew up and it started smoking. I disconnected it right away and found the blown part from the "diode". Attached is an image from the receiver and the diode.

I am looking for some help if replacing the damaged part, would be sufficient to bring the receiver back to life, or it is probably damaged beyond repair.

Thanks

Edit: The markings are 47 10T

#### Attachments

• FullSizeRender (5).jpg
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• FullSizeRender (4).jpg
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#### davenn

Moderator
Sep 5, 2009
14,039
I believe it was a diode that blew up and it started smoking. I disconnected it right away and found the blown part from the "diode". Attached is an image from the receiver and the diode

It's not a diode, it's a 47uF 10V tantalum capacitor

chances are,e even if you replace the cap, the unit will still be dead because the higher voltage will have killed other parts

#### stef_stef

Jun 18, 2018
6
It's not a diode, it's a 47uF 10V tantalum capacitor

chances are,e even if you replace the cap, the unit will still be dead because the higher voltage will have killed other parts
I guess the only way to find out would be to replace it?

#### davenn

Moderator
Sep 5, 2009
14,039
I guess the only way to find out would be to replace it?

99% probability it ( if the rest of the board was OK) would still work without the cap

#### stef_stef

Jun 18, 2018
6
99% probability it ( if the rest of the board was OK) would still work without the cap

Well, I connected it for a brief moment by mistake to the correct power source, and the cap started glowing, so I disconnected it ASAP.

I think it is a safer option to replace the cap first, and test it out. Hopefully, I can find a similar replacement over here, so that I do not have to order it online.

#### davenn

Moderator
Sep 5, 2009
14,039
Well, I connected it for a brief moment by mistake to the correct power source, and the cap started glowing, so I disconnected it ASAP.

you can give it a try, but most likely the one or both of those chips will have died due to over voltage long before the capacitor glowed and emitted smoke
it would only take a fraction of a second to kill the chip(s)

#### stef_stef

Jun 18, 2018
6
you can give it a try, but most likely the one or both of those chips will have died due to over voltage long before the capacitor glowed and emitted smoke
it would only take a fraction of a second to kill the chip(s)

Thanks so much for the input. Either way, my transmitter is dead too i guess... So it is time for an upgrade, just wanted to test thing out before I throw them away

Btw, that cap is rated at 10V and I supplied little less than 8V when it burned out. The receiver itself is designed for 5V

#### Bluejets

Oct 5, 2014
5,866
Why would the Tx be dead also?
Same high voltage treatment?
After market 2.4g receivers are available for as little as $15 for short range, maybe$25 for long range.

#### stef_stef

Jun 18, 2018
6
Why would the Tx be dead also?
Same high voltage treatment?
After market 2.4g receivers are available for as little as $15 for short range, maybe$25 for long range.

Nah, the reason why I damaged the receiver was probably because of a faulty Tx. I was trying to troubleshoot what part of the equipment is not working... But since I tried the Tx with a friends receiver that I know it works, it is most probably the Tx that is not functioning properly.

And yeah, I will eventually switch to 2.4 Ghz equipment. I needed a new radio anyways

#### Bluejets

Oct 5, 2014
5,866
Might be a good lesson for you then in that case.
I'd suggest a quick look at the attachment

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• image.jpeg
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#### stef_stef

Jun 18, 2018
6
Might be a good lesson for you then in that case.
I'd suggest a quick look at the attachment

Haha Great one. Except that would not have been able to sleep unless I got this fixed or trashed.

P.S. Nobody knows me over here

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