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Lexicon Troubleshooting & Maintenance
3-3
component is properly grounded and connected to the same
electrical ground as the ZX-7/RX-7.
3. Turn off all components within your system, and then
disconnect the input cable on the amplifier. Turn the amplifier
back on. If the hum disappears the fault may be with the input
cable that is being used. Make sure the cables are properly
shielded or use a cable that has better shielding. Make sure the
cable is not running or laying on top of any AC power cords.
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 Service at 781-280-0300
3. Visit www.lexicon.com for frequently asked questions and
additional troubleshooting information.
Note:
Visit the knowledge base at http://www.lexicon.com/kbase for answers to
frequently asked questions and additional troubleshooting information.
MAINTENANCE
Routine maintenance should be performed on a periodic basis.
Clean the exterior surfaces of the unit with a soft, dry, lint-free cloth.
Do not use alcohol, benzene, acetone-based cleaners, or strong
commercial cleaners. Do not use a cloth made with steel wool or
metal polish. If the unit is exposed to a dusty environment, a
low-pressure blower may be used to remove dust from its exterior.