An issue was observed in which radial motion on the Video Trolley Mk 1 did not respond to commands. After troubleshooting, it was determined that this was due to the "OP LIMIT" interlock - the "OP LIMIT" pushbutton on the console was illuminated in red, and needed to be continuously held down in order to operate the radial in/out motion buttons.

It was determined that the root cause of the issue was a failed radial limit switch which was likely damaged during trolley transport. The limit switch was replaced, and functionality was restored.