Analog stick
Disconnect the controller and discharge static before opening. The stick module holds small springs and a return mechanism that can spring loose, so work over a clear surface.
Analog stick repair
The analog stick is the most worn part of a well-loved controller. Inside the module, two potentiometers track the stick's position. As they wear, the controller reports movement when the stick is centred, the familiar drift, or it fails to reach full range in a direction.
- Confirm drift: use a controller test homebrew to watch the stick's resting values. Constant off-centre readings point to a worn module.
- Open the controller: remove the back screws and separate the halves to reach the stick assembly.
- Try cleaning: a little contact cleaner into the potentiometer can revive light drift temporarily.
- Replace the module: for lasting repair, desolder the worn stick module and fit a fresh replacement of the correct type.
- Recalibrate and test: reassemble, then verify centre and full range on every axis.
Cleaning versus replacing
- Cleaning is quick and may buy time, but worn pots usually drift again.
- Replacement requires soldering but is the only permanent fix.
- The C-stick uses a similar module and can be serviced the same way.
Match the part
Use a stick module made for the GameCube controller. Generic modules may differ in pinout or feel.