Futaba trainer port w/ 9xr as master troubleshoot

[HighSierraCrashTest]

I can't get my futaba radio to work as a buddy box. Is there a way to make this work?

[Kilrah]

Hmm, knowing what you already attempted might kind of simplify the answers

[HighSierraCrashTest]

I 'll start with cable: I have is a futaba square to round 6-pin DIN connector to go into the older style TX's.

I have the trainer switch enabled in the model configuration and I have also have the trainer page configured for three channels Rud, Ele, Ail to do := mode and the switch is set to TRN.

The four numbers at the bottom do not change when I plug in the buddy box TX and four channels go to center position when I hit the trainer switch.

I read about soldering the PPM connection on other forums, is this something I should check out?

[Kilrah]

I 'll start with cable: I have is a futaba square to round 6-pin DIN connector to go into the older style TX's.

Is it a genuine Futaba cable? These usually are one-way only, should have one side labelled as master and the other as slave. My guess is you have a cable wired to have the square plug as master.

Are you able to beep the connections or open the plugs?

[HighSierraCrashTest]

I checked the cable, has Signal IN and Signal Out both crossed over. All other pins are connected except for V+ and nc.

[Kilrah]

Oh wait a second, 9xr... I think I've read that the Signal IN pin is actually unconnected in the radio! I remember reading about someone opening the radio and bridging the IN and OUT pins for that reason...

[HighSierraCrashTest]

I just bridged pin 3 and pin 6 and it works!



For anyone else who comes upon this thread with the same issue:


I'd attach an image of what I've done, but my finger has a blister from working the screwdriver so much.

Looking from the top down to the TX with the sticks pointing away from you, pins 3 and 6 are on the left, closest to the JR plug.

• Unscrew all 10 case screws
• carefully pull off the back case making sure everything is unplugged (battery, module) and mind the plug on the bottom corner.
• unscrew the two screws holding down the board with the futaba connector
• turn the board over and solder the two pins on the left.
• reassemble - mind the wiring, because there's nothing quite like trying to fit a wire back into a 1mm pin.

[bobferguson]

Will this work with a 9cap micro plug. And turn the 9cap on as slave.

[evhfpv]

I am having the same issue, I want to connect my headtracker to my 9XR and it doesn't work.
Also, I am a bit hesitant to connect pins 3 and 6. When I measure the voltage on pin 3 (transmitter on, nothing plugged into the trainer ports) I see a nice PPM signal.

So connecting pins 3 and 6 means connecting 2 outputs together, and this seems wrong to me... or am I missing someting?