Cube Red Pro standart set, main out and auxilary out doesn't work

Cube Autopilot
1

Hi all,

I recently purchased a Cube Red Pro Standard Set with ADS-B, currently running ArduPlane V4.6.0. I’m having trouble getting any servos connected to the MAIN OUT rail to move.

Here’s what I’ve tried so far:

  • Provided a steady 5V to the servo rail using a 5V BEC (confirmed with a multimeter).
  • In Setup > Mandatory Hardware > Servo Output, I can see the PWM output values change when I tilt the Cube, so the mixer seems to be working.
  • Tested servo signal output using an Arduino on a MAIN OUT pin — no PWM signal detected.
  • Tried disabling all arming checks and “arming required” to allow arming without a safety switch (my safety switch seems broken).
  • Still no servo response.

Could this be due to being on the test bench with inconsistent compass data or GPS lock?
Is there a reliable way to confirm whether the MAIN OUT rail is outputting PWM at all?

Any help or suggestions would be appreciated!