airguy
Well-Known Member
I'm trying to diagnose a problem I'm having with my elevator trim position indicator, I'm using a Ray Allen servo and feeding +5 volts and ground to the potentiometer on the servo, and returning the wiper signal back to the EMS. I've pulled the servo apart and confirmed that it's working properly, but I'm still getting a widely variable voltage coming back from the EMS on that pin. What is the impedance level on the EMS sensor pins? When I have the trim unit disconnected and the Dynon powered up, I am measuring approx. 4 volts on the pin that is connected to the Dynon EMS for the potentiometer wiper - but I don't know if that is just a "floating" non-connected voltage, or a sign of bigger problem.