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Re: Onboard charger capacitors failed

Posted: Sun Nov 08, 2020 11:01 am
by nlspace
Hey guys, how about moving your off topic to a separate thread and delete the previous 2 posts--let's not degrade the signal to noise ratio on troubleshooting and repairs even more.

Re: Onboard charger capacitors failed

Posted: Thu Feb 11, 2021 1:05 am
by Who1981
This thread has been quite helpful, thanks!
I just purchased a 2012 Leaf, CHEAP, with a bad charger. Looks like it has at least 1 fried suppression cap, that coated the entire inside of the charger with magic smoke residue. I'll dig in farther and post more pictures soon.

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On the top board, D547 looks a little toasted, but tests okay.

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Oh, and the OEM charger appears to have been upgraded to 240 volt capability. Any idea if this is reliable?

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Re: Onboard charger capacitors failed

Posted: Thu Feb 11, 2021 7:16 am
by nlspace
One lead of the blue capacitor is easy to access from the bottom side, the other lead is underneath the waffleplate about an inch. If you have a long skinny tip on your solder iron then you could reach in to remove/replace the cap.

Re: Onboard charger capacitors failed

Posted: Thu Feb 11, 2021 9:57 am
by wxmatt
It has been a couple of months so I guess I should update:

To this point, the on board charger with the replaced capacitors and the swapped cooling components is continuing to perform as expected without errors. The car charges, and let’s be honest, that’s enough!

In order to guarantee that my EVSE didn’t cause the components to fail (assuming that could’ve been the original culprit), I replaced my EVSE with a second hand, excellent condition Aerovironment. So far, so good.

A huuuge thanks to everyone (especially @nlspace) for all of your help! It took a lot of time, and effort, but it brought my LEAF back to life.

Re: Onboard charger capacitors failed

Posted: Thu Feb 11, 2021 9:48 pm
by 91040
Your EVSE looks like it was modified by EVSE Upgrade. They did quality work but I would test it given your onboard charger was blown.
Who1981 wrote:
Thu Feb 11, 2021 1:05 am

Oh, and the OEM charger appears to have been upgraded to 240 volt capability. Any idea if this is reliable?

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Re: Onboard charger capacitors failed

Posted: Fri Feb 12, 2021 1:53 pm
by Who1981
NLSPACE thanks, I have just such a soldering iron. Wish me luck.

91040 can you recommend a method of testing an EVSE?

Re: Onboard charger capacitors failed

Posted: Sat Feb 13, 2021 10:26 pm
by 91040
Sorry but I am not qualified to offer any technical advice.

The J1772 standard is published. OpenEvse.com had a page which showed and discussed it. They also had a schematic for a small board to check whether the EVSE conformed to the standard.

There are also threads on this forum that discuss EVSEs and their problems. Hopefully, a knowledgeable person will soon weigh in. Good luck!

Link to J1772 basics- https://openev.freshdesk.com/support/so ... -sae-j1772

Testing an openevse may provide some insights-
https://openevse.dozuki.com/Guide/Testi ... 12?lang=en

Re: Onboard charger capacitors failed

Posted: Wed Feb 17, 2021 11:19 am
by Who1981
Thanks, I'll look into testing the EVSE.

I was delayed by weather, but finally got the bottom board removed, and found another toasted capacitor, a blown fuse, and an exploded diode. I've ordered a used onboard charger off eBay for $450...🤞🏼🤞🏼🤞🏼

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Re: Onboard charger capacitors failed

Posted: Wed Feb 17, 2021 5:15 pm
by nlspace
Those are all on the AC input side of the OBC, so that is actually a good thing in that replacement can be made on those parts to repair the unit.

Was the OBC already defective when you got the car? This didn't happen by you plugging in the EVVSE to chargge the car?

What was the reference designator of the fuse--like F101, etc?

Re: Onboard charger capacitors failed

Posted: Thu Feb 18, 2021 7:18 pm
by Who1981
I bought the car cheap with the charger already not working. The previous owner just said it stopped charging in the middle of the night. It was on this evse that has been modified.

F101 is blown.

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The other capacitor I found might be even trickier to remove with the waffle plate in place. If I do try to repair this board, I'll be getting some good desoldering practice.