FOCUS Enhancements DVCPRO50 - Manual (Page 10)

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Lightning and Power Surges
During electrical storms or when left unattended and unused for
long periods of time, unplug the FS-100 from the power source
and disconnect the antenna or cable system.
Power Lines
Do not locate an outside antenna system in the vicinity of
overhead power lines, electric light or power circuits, or where it
can fall onto such lines or circuits.
When installing an outside antenna system, extreme care should
be taken to keep from touching such power lines or circuits as
contact with them might be fatal.
Optical Precaution
The use of optical instruments with this device will increase
hazards to the eyes hazard.
Maintenance and Moving
Cleaning
Unplug this product from the wall outlet before cleaning. The
product should be cleaned only with a polishing cloth or a soft dry
cloth. Never clean with furniture wax, benzine, insecticides or
other volatile liquids since they may corrode the cabinet.