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12 Outdoor Antenna Grounding—If an
outside antenna or cable system is connected
to the video product, be sure the antenna or
cable system is grounded so as to provide
some protection against voltage surges and
built-up static charges. Section 810 of the
National Electrical Code, ANSI/NFPA No. 70
(Section 54 of Canadian Electrical Code, Part 1)
provides information 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-discharge unit, connection
to grounding electrodes, and requirements for
the grounding electrode. See example below.
Example of Antenna Grounding
IMPORTANT SAFEGUARDS
disconnect the antenna or cable system. This
will prevent damage to the video product due
to lightning and power line surges.
Service
17 Servicing—Do not attempt to service
this video product yourself as opening or
removing covers may expose you to dangerous
voltage or other hazards. Refer all servicing to
qualified service personnel.
18 Conditions Requiring Service—
Unplug this video product from the wall outlet
and refer servicing to qualified service
personnel under the following conditions.
A. When the power-supply cord or plug is
damaged.
B. If liquid has been spilled, or objects have
fallen into the video product.
C. If the video product has been exposed to
rain or water.
D. If the video product does not operate
normally by following the operating
instructions. Adjust only those controls that
are covered by the operating instructions.
Improper adjustment of other controls may
result in damage and will often require
extensive work by a qualified technician to
restore the video product to its normal
operation.
E. If the video product has been dropped or
the cabinet has been damaged.
F. When the video product exhibits a distinct
change in performance—this indicate a
need for service.
19 Replacement Parts—When replace-
ment parts are required, have the service
technician verify that the replacements he uses
have the same safety characteristics as the
original parts. Use of replacements specified
by the video product manufacturer can prevent
fire, electric shock, or other hazards.
20 Safety Check—Upon completion of
any service or repairs to this video product, ask
the service technician to perform safety checks
recommended by the manufacturer to
determine that the video product is in safe
operating condition.
21 Wall or Ceiling Mounting—The
product should be mounted to a wall or ceiling
only as recommended by the manufacturer.
22 Heat—The product should be situated
away from heat sources such as radiators, heat
registers, stoves, or other products (including
amplifiers) that produce heat.
13 Power Lines—An outside antenna
system should not be located in the vicinity of
overhead power lines, 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 touching or approaching
such power lines or circuits as contact with
them might be fatal. Installing an outdoor
antenna can be hazardous and should be left to
a professional antenna installer.
Use
14 Cleaning—Unplug this video product
from the wall outlet before cleaning. Do not use
liquid cleaners or aerosol cleaners. Use a
damp cloth for cleanig.
15 Object and Liquid Entry—Never push
objects of any kind into this video product
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 on the video product.
16 Lightning—For added protection for this
video product during a lightning storm, or when
it is left unattended and unused for long periods
of time, unplug it from the wall outlet and
ANTENNA
LEAD IN
WIRE
GROUND CLAMP
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
ELECTRIC SERVICE
EQUIPMENT
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
Important Information
caution 4/8/97, 10:07 AM4