Practice question

An MMU front-panel display shows a 'FIELD CHECK CH 4' fault. What is the most likely cause?

  1. The actual field output on channel 4 does not match what the controller said it should be (e.g., wiring fault, load switch fault, or controller programming mismatch)
  2. BBS batteries are below 10 V
  3. Cabinet temperature is above 50 C
  4. Detector amp 4 has dirt on it

Answer: A — The actual field output on channel 4 does not match what the controller said it should be (e.g., wiring fault, load switch fault, or controller programming mismatch)

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