Maddmax, please clarify if you have the FY31AP connected the RX when testing it on the bench. If you do, remove the RX from the circuit to isolate the environment and reset gyros; then connect one servo at a time to different channels of FY31AP. Hopefully you be able to either identify faulty servos, FY31AP channels or the RX itself.
Please let us know how It goes.
Originally Posted by Maddmax
I have a few questions about the FY31 that I hope you guys can help with. I initially set up the unit last month and everything seemed to work OK. I finished building the plane, Skywalker, and installed the GPS high and in the front. The FY31 is essentially at CG in the fuselage bay. Sitting on the bench, after appling power, both lights come on but every 2-3 seconds the unit makes all the control surfaces vibrate. I have detached everything and started from scratch twice, reset the GPS twice and it continues to act up. Any ideas???