There have been a number of posts and videos about changing the FPV camera if it suffers damage.

There is a note in the manual that there is software to download once this has been done, a number of people have metioned that there is no information available from DJI about this step.

I have changed a camera over to investigate this further, it is not as simple as detailed in the videos but not impossible.

• After you have carried out the physical change over make sure you have a fully charged battery in the drone and a charged battery for the goggles
• Power up the goggles and then the aircraft, the remote is not required.
• Once the aircraft has established a connection to the goggles there will be a message in the goggles under 'Status' that the gimbal needs to be calibrated in the DJI Fly App
• You can calibrate the gimbal in the goggles but this will not remove the message in the Goggles Status list.
• Ensure your phone and tablet is connected to the internet - I used an iOS device for this as I don't have any Android devices, sorry.
• Connect your phone or tablet to the goggles using the USB OTG adapter supplied and a cable from the OTG adapter to your phone or tablet
• At this point the fly app will be displaying a picture of the DJI FPV drone, leave the App on this screen
• After a number seconds a message will appear in the top left quadrent of the phone or tablet, this will be in Chinese, Half in white, two characters in blue
• Basically it says in white - 'Camera requires calibration, battery must be at 30%', the bit in blue says 'Download'
• Pressing the blue characters will start the update process,
• A new Chinese message will appear that says the update is in progress do not power down goggles or aircraft
• The blue symbols will take you to a progress page,
• Once the progress gets to 100% the process is completed.
  

Thats it, intrestingly if the camera is changed back it does not request to calibrate a camera it has seen before.

DJI, you need to make sure that messages displayed in the Fly App are in the native language of the Fly App!

Great information! Thank you.

Beta tester...   

could you please share with me the calibration matrix of DJI FPV Drone i.e cx, cy, fx, fy, k1, k2, k3, k4, k5

Does not work with Android Fly app, download fails

This does not work