Xbox One Wired Controller Left Analog Stick Sensitivity Issue Repair:
My Xbox One controller started to have issues with its Left Analog Stick after 3000+ hours of use on PSO2, where there was a huge dead space where it could not detect anything.
You can see the dead zone highlighted in red below:
This resulted in characters in games only being able to walk slowly until you jammed the stick right to its edges which would then take several seconds before it would register and the characters in game would only then start to run.
To open up a Xbox One controller you need to carefully remove the left and right sides of the controller with a plastic pry tool:
With a T9 security screw bit remove 5 screws.
One of which is hidden underneath the serial sticker in the battery compartment:
If you peel this very carefully you will be able to stick it back down afterwards.
Carefully remove the shoulder button from its tabs so you can get easier access to the PCB and then you need to de-solder the 14 points highlighted in red below:
De-soldered and removed:
I then replaced it with a new ALPS analog stick and re-assembled after also replacing the very worn out thumb sticks :
And now working perfect again!