This is my first message on this forum so hi everyone!

I have an issue with a Zenmuse H3-2D. As soon as it gets powered it starts acting crazy. Really crazy.

Basically it starts shaking violently, up and down, for a few seconds. After a few seconds, it calms down then it does it again. There is also no balance. See this quite similar video which I found on YouTube :



To do some testing I attached another H3-2D. No problem at all with this other unit but there is one difference between the two. See pictures attached. IMU firmware is 1.8 on the crazy gimbal and 1.2 on good gimbal. Same bootloader, same phantom (a P2), same 8 pin cable, same Gopro (a H3+ Black). No other difference.

I suspect the 1.8 firmware is the issue but I have no way to be 100% sure. I am not the first owner and the history is not certain. There is also no more warranty.

I have of course immediately tried to downgrade from 1.8 to 1.2 but no luck. Any version of the Zenmuse Assistant software*, any version of the Phantom Assistant software I use, it is always the same message, no upgrade available.

* In this case I connect the gimbal to the GCU I received with the Zenmuse and this using the 8 pin cable, the GCU is powered by a 3S battery and the GCU is connected to my PC using a micro-USB cable.

Weird thing is that I cannot make the good gimbal to update to 1.8. No way. Would be risky if problem comes from firmware and there is no way to downgrade but with this other unit, no way to upgrade any higher.

A few notes :

1) the shortcut pins trick will not work because this is not a H3-3D but a H3-2D.

2) I have no issue with X1 calibration at all. As I said above, the other H3-2D works fine.

Is there a way to force downgrade?

Is there a way to force a hard reset?

Any other idea gentlemen?

This is really frustrating.

Thank you in advance.

Seems like an issue with IMU... I suggest you to send it in for repair

DJI-Tim Posted at 2016-2-1 12:31
Seems like an issue with IMU... I suggest you to send it in for repair

The issue is that the H3-2D is no longer under waranty so I am afraid it's going to be quite expensive.

Is this part with the flex ribbon the IMU?



I cannot fing replacement parts anywhere...

After reading many posts on many forums, including this one, I can clearly see that I am not the only one having this issue.
Basically you upgrade the firmware of the gimbal (GCU and/or IMU), this following all the DJI instructions but beware you could get a gimbal acting completely crazy at the end.
Not only with the H3-2D like me but also with the H3-3D or the more expensive Z15.

Unfortunately I have a H3-2D not a H3-3D so there is no hard reset procedure (shortcut pins) that can be applied.
I have also not seen anybody able to downgrade the IMU firmware on the H3-2D.

The only official solution from DJI is to RMA the gimbal.
I do not have the original invoice.
What can I do?

Well I am clearly asking for a commercial gesture and this gimbal to fixed for free.
I would appreciate that
It got bricked because of an official DJI firmware upgrade and I did the right way.
I have a P1, a FC40, a P2, another H3-2D and a H3-3D so I know how to upgrade and how to cross-check.

Waiting for official answer + special RMA instructions. Hopefully DJI will take responsibility.

Dragon99OG Posted at 2016-2-2 04:13
After reading many posts on many forums, including this one, I can clearly see that I am not the onl ...

We are not able to issue RMA here in a forum

For RMA details please contact us via live chat or phone call,

Ok thank you.

Email sent to support.

Hopefully a positive answer to my request.

I will post result here.