Inspire 2 Remote Control Noise when Powered Off

[rocstudios]

I tried to search around but to no avail, just wanted to see if anyone here had the same experience. I just realized it now. I had my remote control inside my pelican case traveling all over Asia to film, got back to the states and took it out of the case and heard a very low mechanical noise (sounds like a gear moving up and down) but when you power it up it disappears and when you have it plugged in to charge there is no noise. As soon as you unplug it even when off mode you can hear the sound.

Anyone experienced the same thing? If so what is it?

Thanks.

 

[ajohnsonlaird]

Is there a chance you could record this noise and post a sample? I'm wondering whether it is actually electrical -- the symptoms you describe make it sound like it might be electrical (e.g. noise disappears when powered on or charging).

I've certainly not heard of this kind of fault before -- but this merely speaks to my higgerance not to my knowledge!

Andy

 

[rocstudios]

hey @ajohnsonlaird - here is the file (Dropbox - I2 Remote Sound.m4a)

It sounds loud since I had the MIC really close to the bottom grill of the remote - but if you have it sitting you could not hear it unless you put your ear next to it.

It only happens when it is on OFF mode. really strange haven't noticed before since I am always in loud places.

Thanks

 

[The Editor]

Moved to Inspire 2 section.

Could it be a fan? As you were traveling around Asia, I assume ambient temp was quite high?
Not sure that it should trigger when powered off though.

 

[rocstudios]

Yeah the temp was around 90 degrees where I was filming - but I left Asia and it was in the case since then I am now back in California and just realized the noise when I took it out of the pelican case - flew the bird a few times no issues at at all, just flew it again about 10 minutes ago. Just odd.......I don't have a backup remote control if I need to send it back in.

 

[rocstudios]

Sounds like a gear moving up and down - never seen the inside of it so I can't say for sure....

 

[Mad_angler1]

Yea it has got to be the fan, very odd though, while it's possible it could be on until the temp drops it should not stay on, if it's happening all the time I can only think it's a leaky transistor on the fan control circuit, crazy odd though.

 

[rocstudios]

Yeah I looked up images online of internals of the remote and I do not see any gears or anything but a fan, its really strange as when it is plugged in the charging unit or when the remote is on - there is no whizzing up and down sound. "Mind Boggled"

 

[ajohnsonlaird]

Wow. I have never heard the likes of that! (Sorry that this is not the answer you were hoping for.)

What on earth could be inside an RC and making that kind of noise? It sounds very much more like a mechanical noise to me. There is a tear down page with images inside the RC. Could it be that the fan has come loose? Might be worth checking out: DJI Inspire 2 Teardown - What's inside? - RC Geeks Blog

Hope that helps.
Andy