Troubleshooting and Maintenance
A humming sound is present in the audio.
Audible hum, or a discernable low frequency noise is one of the most common problems within audio/video systems. This problem, even when the volume is at a low level, Is usually caused by a common problem known as a “ground loop”. A ground loop occurs when there is a difference in ground voltages between two or more components that are connected electrically.
In most cases, one or more of the following suggestions below will solve the hum problem.
1.If a cable TV connection is present, disconnect the cable for the wall outlet. If this eliminates the humming sound, a ground loop isolation device is required. Contact your dealer or cable provider for assistance.
2.Disconnect components one at a time to isolate the problem. Once the problem is identified, make sure the associated component is properly grounded and connected to the same electrical ground as the
3.Turn off all components within your system and then disconnect the input cables on the
4.Ground loop problems may also be caused by poor grounding of the electrical system within your home or may be caused by faulty earth grounds in your home’s electrical system. To isolate the problem, try unplugging components with three prong grounded power cords one at a time to see if one or all are causing the problem. In the past, cold water pipes and other utilities were often used for grounds. These items may not be still valid because of corrosion of the existing pipes and the installation and use of PVC piping. Please check with a licensed electrician for further evaluation.
If all else fails…
1.Contact an authorized Lexicon dealer.
2.Contact Lexicon Customer Technical Support at
Maintenance
Routine maintenance should be performed on a periodic basis. Clean the exterior surfaces of the unit with a soft, dry,
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