What can it be..

[Turbazz]

after my crash few weeks ago, the camera does not come up properly. I have the new controller with the scroll wheel on the side.
if The camera is starting from the lowest position it comes up halfway, it stutters and drops down. I have to do reapply the scroll wheel,catch it then it eventually gets to The top position.

What do you think is wrong guys?

 

[CityZen]

Perhaps the potentiometer that measures the pitch motor position is damaged?

 

[Turbazz]

No idea what this is ?how do I check this out