I ran across a video this week on U tube that show that. So I know there is one. I have taken everything apart on my gimbal trying to fix it. All the potentiometers are good and everything is lined up. Still not working right. It has me grounded.
The camera has a screw on the shaft of the motor. So the camera has to come off first. Take the 2 screws that hold the ribbon guard between the camera and the motor housing. Take 4 screws off the back of camera. Take ribbon loose from camera board. Ribbon has sticky stuff to hold it to side of camera body. Gently peel back ribbon from side of camera to expose screw on motor shaft. Remove screw and camera comes off. By removing camera it exposes 3 screws on inside motor housing. Remove 3 screws and one on outside housing. From there the motor is fully exposed. You can take it from there. When you put it back together make sure flat side of motor shaft is aligned to flat side of camera body.