I bought this used radio a year ago but couldn't check at that time. Now when I started to setup my bird, I found that the Throttle digital trim has some problem.
The trim would go above center but it would not go down. I cannot kill the motor or change the motor idle position.
Another fact is the Pitch Trim would take the trim point to down to zero but the normal throttle trim would not go down once it is moved up. The switch is clicking fine thought.
All the other trim functions are working properly.
I looked into system manu but no help there.
I would appreciate if anyone can guide me what might be going on.