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Hello,

I'm having trouble with my new APM board. I have it all working and set up with Mission Planner. I can see the transmitter signals being received in mission planner but when in manual mode the one servo I have attached to the output rail isn't doing a thing.

I have the JP1 jumper in place and when putting a multimeter across the +ve -ve I see a ~5v signal.

I have tried the servo on other outputs but see no movement there either.

When testing the APM with X Plane I see no outputs to the simulator either.

Can anyone help me out? I've uploaded a video that might explain things a little more clearly.

Update

With the aid of a multimeter I have figured out the issue. There is a problem on the board that is causing the voltage to drop to 3.8 volts on the output rail with the JP1 jumper attached regardless of input power source. When I measure the resistance from the positive input to output channel one pins with JP1 in place it is a lot higher that I would expect.

If I remove the JP1 jumper and power the output separately things work without issue. So it looks like a manufacturing issue. I am returning the board for replacement on Monday.