In this tutorial, I’ll show you how to replace the stock transmitter of your Turnigy 9x with a more advanced module by FrSky.

The FrSky module has many advantages:

• it can cover more distance
• it’s more robust in the presence of noise
• it can receive telemetry data
• it supports different rx modules

On the Internet is available a receiver feature chart about the different receiver modules that also lists the compatibility between the rx and the tx modules.

I brought from Banggood the transmitter module and some receivers:

• FrSky DJT-JR 2.4GHz Transmitter Telemetry Module, tx module
• FrSky D4R-II 2.4G 4CH ACCST Telemetry Receiver, the most “advanced” receiver (telemetry, CPPM…)
• FrSky V8R7-II 2.4G 7CH Receiver, a good 8-channel receiver
• FrSky VD5M 2.4G 5CH Micro Receiver, the smallest receiver, 5 channels

Let’s start removing the original tx module from the back of the radio. With a Phillips screwdriver, open the module and desolder the antenna wire:

You can now pull out the plastic antenna after having unscrewed it and finally remove all the different components:

Before being able to install the new FrSky module, on some models of the Turnigy 9x radio – including my own – a small modification of the plastic case is needed. Open the radio and unscrew the PCB in the back, to be able to pull out the 5 pins that connect the radio to the receiver:

Now remove the plastic emboss around those pins:

After having closed again the radio, you can now install the FrSky module and screw its antenna:

No changes to the configuration of the radio are required, you can simply turn it on and bind the new receivers!

For more details,please refer to original post

http://www.lucadentella.it/en/2015/08/20/installare-trasmittente-frsky-su-turnigy-9x/