Any idea what went wrong ? ( DX6 )

[Rocker]

Had my DX6 bound to my DH 60 Moth .Started the model up,did the usual checks ,all OK .Place the DH 6 Moth on the strip on tick over ( ic motor not electric ).Has I walked back to the flight box for some reason my DH Moth went into full throttle and shot of.down the strip.. I had no control over it 

Luckily it careered into the safety fence.When I got to the model I noticed the DX6 was turn on but had no screen  like the transmitter was turned off I turned  DC 6 off and turned it back on and control was restored to the model .Why did the fail safe not kicking in and return the model to tick over .When I got the model back to the pitts and I check it over and the fail safe was working OK .I do not know what cause the model to go into full throttle and lose all radio control..Yet the transmitter switch was on but the transmitter was not working with a blank screen .The DX6 is working fine now but can not trust it anymore 

Any idea what could of caused this .I have no idea what caused  this happened

Edited August 30 by Rocker

[Colin Carpenter]

I have seen something similar on the bench. Is the orange SPEKTRUM light on when switched on ? This is an RF meter I’m informed! No light and RF board going down. In this case it was a total board failure in seconds if I remember correctly!!

[Cuban8]

A nightmare intermittent fault - both for the user and anyone attempting to effect a diagnosis and repair unless it's a symptom on that particular radio that is known about.  Would certainly point to the tranny given the blank display and loss of control. Loss of RF output seems unlikely as that would have put the RX into failsafe and throttle to idle, which you had set correctly when you tested the system afterwards. Unless the fault can be encouraged to reoccur without too much effort you are in a bind (no pun intended).

Maybe pack the tranny off to whoever is doing Spektrum repairs these days and see what they say. Bearing in mind that the unit is old tech now with a low value (if it's one of the old DSM2 versions) the saying 'thowing good money after bad' might be pertinent as an inspection and test that could well return 'no fault found' and might exceed the tranny's value and leave you back where you started. Either way, I wouldn't risk using the radio again as you say unless the fault can be found and fixed.

Edited August 30 by Cuban8

[GrumpyGnome]

Sounds like the tx transmitting some spurious commands when it appeared to be switched off..... deffo not to be trusted.

 

If it's a G1, bin it; if it's G2, get an estimate (if possible); if G3, get it fixed.

[Rocker]

Thanks everyone Not worth risking and not worth repairing. I have given the DX6 to a youngster in our club on the understanding he only uses it on his simulator and not for flying models .There is always a good side to thinks .Now do I buy the NX 8+ or the NX 10  Or change completely and buy a Futaba 16 IZS 🤔

[Kim Taylor]

1 minute ago, Rocker said:

Thanks everyone Not worth risking and not worth repairing. I have given the DX6 to a youngster in our club on the understanding he only uses it on his simulator and not for flying models .There is always a good side to thinks .Now do I buy the NX 8+ or the NX 10  Or change completely and buy a Futaba 16 IZS 🤔

Now you've done it!!!!

Wrt your original post, I'd ask whether the tx was sitting in full sunshine before the incident?

I think I've had similar, in hot/sunny weather (by similar, I mean unexplained loss of control).

In answer to your next question, either of the Spektrum, or if you're not afraid of a bit of a learning curve, one of the open source radios, plus a 4 in 1 module to emulate your existing Spektrum, + any others you may have or want to try.

I went Radiomaster TX16S Mk11 with the built in 4 in 1 module and don’t regret it (yet, anyway) 

Kim

[Rocker]

40 minutes ago, Kim Taylor said:

Now you've done it!!!!

Wrt your original post, I'd ask whether the tx was sitting in full sunshine before the incident?

I think I've had similar, in hot/sunny weather (by similar, I mean unexplained loss of control).

In answer to your next question, either of the Spektrum, or if you're not afraid of a bit of a learning curve, one of the open source radios, plus a 4 in 1 module to emulate your existing Spektrum, + any others you may have or want to try.

I went Radiomaster TX16S Mk11 with the built in 4 in 1 module and don’t regret it (yet, anyway) 

Kim

No I always keep my transmitters in the car out of the sun .I have a feeling I have read some where the DX 6 was a bit prone to motherboard problems 

[kc]

I think you have done the right thing in giving up on a Tx that has failed - but for the record you should state which version of the DX6 encountered problems- and whether DSM2 or DSMX - and the Rx used - genuine Spektrum or maybe counterfeit or another brand.   Also what type of battery in the Tx - individual cells? - the fault sounds rather like a momentary loose battery connection .    Accurate data might help others.

 

With Futuba you don't get a 'model match' like Spektrum  ( unless that has changed on recent versions )  if that makes your decision easier.  

[GrumpyGnome]

@Rocker   If you have a few Spektrum/DSM2/DSMX receivers, a Radiomaster TX16S with MPM will allow you to use them, reducing the cost. As will several other open source radios. Loads cheaper than Spektrum, very reliable RF link, tons of functionality. 

 

Don't be put off by stories of how difficult EdgeTX/OpenTX is..... it's as simple or as complex as you want to make it. And has sooooo much flexibility.

 

 

[GrumpyGnome]

Semi-duplicate thread suggests Rocker's already decided...

[Rocker]

The transmitter was the DX 6 DSMX and the receiver was the AR 620 

[Simon Clark]

2 hours ago, kc said:

With Futuba you don't get a 'model match' like Spektrum  ( unless that has changed on recent versions )  if that makes your decision easier.

Yes you do now - this was introduced via a software update to my T18SZ a few years ago (can't remember exactly when). I don't know for certain if it is on all new Futabas but the T16iZ uses basically the same software as T18SZ so it is a reasonable bet to assume that is on this also (and probably on all new Futaba TX's)

[Cuban8]

A friend of mine lost two VERY expensive models a while back and over a period of a few months, when his top of the range NON SPEKTRUM  radio was finally found to be faulty by the main agents. He flys a different make now. Just saying - No piece of technology from any of the manufacturers is 100% bullet proof and given our modellers' paranoia about radios (nothing new there, look at some old mags from 40+ years ago) and the nonsense often spouted all over the web and other places over brand X versus brand Y it's not surprising things can get a bit fraught.