4
Important Safeguards
13. Outdoor Antenna Grounding — If an outside
antenna or cable system is connected to the video
unit, be sure the antenna or cable system is
grounded so as to provide some protection against
voltage surges and built-up static charges. Part 1
of the Canadian Electrical Code, in USA Section
810 of the National Electrical Code, provides infor-
mation with respect to proper grounding of the
mast and supporting structure, grounding of the
lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna dis-
charge unit, connection to grounding electrodes,
and requirements for the grounding electrode.
14. Lightning — For added protection of this video unit
receiver during a lightning storm, or when it is left
unattended and unused for long periods of time,
unplug it from the wall outlet and disconnect the
antenna or cable system. This will prevent dam-
age to the video unit due to lightning and power-
line surges.
15. Power Lines — An outside antenna system should
not be located in the vicinity of overhead power
lines or other electric light or power circuits, or
where it can fall into such power lines or circuits.
When installing an outside antenna system,
extreme care should be taken to keep from touch-
ing such power lines or circuits as contact with
them might be fatal.
16. Overloading — Do not overload wall outlets and
extension cords as this can result in a risk of fire or
electric shock.
17. Objects and Liquids — Never push objects of any
kind into this video unit through openings as they
may touch dangerous voltage points or short out
parts that could result in a fire or electric shock.
Never spill liquid of any kind onto the video unit.
18. Servicing — Do not attempt to service this video
unit yourself as opening or removing covers may
expose you to dangerous voltage or other haz-
ards. Refer all servicing to qualified service per-
sonnel.
19. Damage Requiring Service — Unplug this video
unit from the wall outlet and refer servicing to qual-
ified service personnel under the following condi-
tions:
a. When the power-supply cord or plug is dam-
aged.
b. If any liquid has been spilled onto, or objects
have fallen into the video unit.
c. If the video unit has been exposed to rain or
water.
d. If the video unit does not operate normally by
following the operating instructions. Adjust only
those controls that are covered by the operating
instructions, as an improper adjustment of other
controls may result in damage and will often
require extensive work by a qualified technician
to restore the video unit to its normal peration.
e. If the video unit has been dropped or the cabi-
net has been damaged.
f. When the video unit exhibits a distinct change
in performance — this indicates a need for ser-
vice.
20. Replacement Parts — When replacement parts
are required, be sure the service technician has
used replacement parts specified by the manufac-
turer or have the same characteristics as the origi-
nal part. Unauthorized substitutions may result in
fire, electric shock or other hazards.
21. Safety Check — Upon completion of any service
or repairs to this video unit, ask the service techni-
cian to perform safety checks to determine that the
video unit is in safe operating order.
ANTENNA LEAD IN WIRE
GROUND CLAMP
ELECTRIC
SERVICE
EQUIPMENT
NEC — NATIONAL
ELECTRICAL CODE
ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND
CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
