General Troubleshooting 4-73
Measuring DC Power Supply Voltages
1. Check the power supply status LEDs, they should be bright.
2. If the system is operational, use the diagnostic test Monitor Voltages.
Ensuring Ground Integrity
Intermittent or missing ground connections can result in minor interferences in the
system. As examples:
■ control panel display can be affected (blank)
■ I/O board errors
■ False jam reporting
■ Erroneous thermistor readings
■ Major interruptions
■ Damage to the electrical boards
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