Replacing Internal RF Module on Radiomaster TX16S with ELRS

This article shows you how to replace the internal RF module for TX16S form 4in1 to ELRS.

Table of Contents

Tools and parts required

Removing the old RF module

  • Remove Battery cover and battery.
  • Remove side grips and external RF module bay cover
  • Remove 2 screws next to antenna.
  • Remove 4 screws at the back.
  • Carefully lift the back cover. There is one or two speaker cables connected between back cover and Main board. Disconnect them before taking apart the back cover.

  • Cut the zip-tie holding the antenna cable to the plastic frame. Be careful not to cut or crimp the antenna cable.
  • Disconnect the RF board data cable from the main board. The new RF module comes with new cable attached.
  • Remove 3 screws from the the RF board.
  • Carefully disconnect the SMA antenna connector from the RF board.
  • Carefully remove all old glue from the SMA connector.

Installing the new ELRS RF module

  • Install the replacement ELRS RF module and install the 3 screws.
  • Install the SMA antenna connector on the RF module.
  • Put a zip-tie around the antenna cable and RF board mount to give some strain relief to the antenna SMA connection.
  • Put some hot glue on the SMA connector to ensure it doesn’t easily come off during use.
  • Connect the RF data cable to the main board.
  • Install the back cover, be sure to attach the speaker cables to the main board.
  • Install 4 screws on the back cover.
  • Install 2 screws on the antenna holder.
  • Fix the side grips, RF bay cover, Battery and Battery cover

Update Edge TX settings

  • Power ON the controller and go to Hardware settings. SYS->Hardware
  • Scroll down to Internal RF and select CRSF. Choose preferred baud rate. e.g. 1.87M
  • For each model, start the Express LRS app and choose required settings. SYS->Tools->ELRS

That’s it. We hope you found this guide helpful.