Alert X9303 2.4 Ghz Xmtr internal failure

[msgt81]

If you have a JR X9303 2.4 Ghz radio, you must read the following link from
Horizon Hobby, regarding a very possible short that can occur in the Xmtr.

http://www.horizonhobby.com/articles...articleID=1822

This is about a short that can occur between the aileron potentiometer wires and the voltage regulator wires chafing together. Several radios checked in the area had this chafing problem.

[Miami Mike]

This is being posted all over the RCGroups forums. That's understandable, but perhaps it would be better to give it a more informative title and ask the moderators to make it a "sticky", to keep it near the top of the message list.

[fhhuber506771]

Its not a short... its a potential for a cut wire due to pinching between the gimbal and a voltage regulator.

Results woul be similar... loss of predictable aileron function.

[msgt81]

Originally Posted by fhhuber506771

Its not a short... its a potential for a cut wire due to pinching between the gimbal and a voltage regulator.

Results woul be similar... loss of predictable aileron function.

The JR Service Center has discovered that many of the X9303 2.4 transmitters have an issue in that the wires attached to the aileron potentiometer can come into contact with the voltage regulator that is mounted in the back of the transmitter. With repeated use it is possible that the insulation can wear through exposing the wire at the point that it contacts the regulator.
I would think unless the regulator is entirely made of some non-conductive material, when the bare wires are exposed to the regulator, I would call that a short. No matter what it is called, a dangerous condition exists that needs to be immediately corrected to prevent injury to pilots, spectators and planes.

[lazy-b]

Its Been Posted in RunRyder.......I already make the Modification, I just Cover the Regulator circuit board with a Sheet of Mylar Plastic, and have re-routed the Ailerron Wiring.

I suggest all X9303 or DSX9 owner should open their transmitter.

here its links:
http://www.runryder.com/helicopter/t453206p1/

[flazo]

if you buy a x9303 should it be sent to Horizon so they can fix the problem, Also I think they should pay for the shipping?

[PabloM]

Originally Posted by flazo

if you buy a x9303 should it be sent to Horizon so they can fix the problem, Also I think they should pay for the shipping?

I just bought a 2.4 9303 and found out about this after buying. But I don't think it warrants sending it back to Horizon for repair. I looked at the posted fix and quite honestly if you can install a radio system into a plane it looks like this should be no problem. I've used the radio a few times already, but I'll probably do this in a few weekends - I'll save it for a rainy or windy day activity.

They give you the option to send it in if you don't want to do it yourself, but I doubt they will pay shipping. They give you the choice of doing it yourself, apparently without voiding the warranty. I'll take that option.

If anyone wants, I'll take some pictures when I do this but I think it's been pretty well covered elsewhere.

[ivanc]

Horizon reroutes the aileron pot wires so they do not interfere with the VReg. They've been doing this since the flaw has been discovered. If you bought a X9303 recently, the wires most likely have been rerouted. Open the tranny to confirm it.

i.

[flazo]

I opened the trans and followed the posted solution...is working okay.

fred

[tiny_feet]

Hi...is this including the XP9303 has the same Problem?
Pls...let me know,i have xp9303 but i don't know if this is the same problem.

[Miami Mike]

No, the XP9303 doesn't have that problem. This is from the Horizon Hobby Page:

X9303 2.4 Service Bulletin

The JR Service Center has discovered that many of the X9303 2.4 transmitters have an issue in that the wires attached to the aileron potentiometer can come into contact with the voltage regulator that is mounted in the back of the transmitter. With repeated use it is possible that the insulation can wear through exposing the wire at the point that it contacts the regulator. It is recommended that the aileron potentiometer wires be rerouted per the following instructions and photographs. This notice does not affect XP9303 72 MHz transmitters.

[tiny_feet]

Hi...Mike
Thank you very much for a quick responed

[PabloM]

Originally Posted by ivanc

...If you bought a X9303 recently, the wires most likely have been rerouted. Open the tranny to confirm it.

I made the fix. It was a new TX but this is a small shop in a small town (currently in El Paso) so it may have sat on a shelf for a while. But it does have the updated receiver with the "brown-out" info and quick re-boots.

Anyway, easy fix.

[Eplane65]

While I have performed the TSB recommended by Horizon, I'm still unsure if this will solve the problem. Looks to me like there is some possible chafe points elsewhere. Horizon should come out with a new TX back where the electronic component has been moved elswhere.

[fhhuber506771]

Originally Posted by Eplane65

While I have performed the TSB recommended by Horizon, I'm still unsure if this will solve the problem. Looks to me like there is some possible chafe points elsewhere. Horizon should come out with a new TX back where the electronic component has been moved elswhere.

They noted in one message that they were working on changing the 2.4 ghz board to move the offending component(s)