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Sony RA-3B Service Manual Page 125

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Antennas
Outdoor Antenna Grounding — If an
outdoor antenna is installed, follow the
precautions below.
An outdoor antenna system should not be
located in the vicinity of overhead power
lines or other electric light or power circuits,
or where it can come in contact with such
power lines or circuits.
WHEN INSTALLING AN OUTDOOR
ANTENNA SYSTEM, EXTREME CARE
SHOULD BE TAKEN TO KEEP FROM
CONTACTING SUCH POWER LINES OR
CIRCUITS AS CONTACT WITH THEM IS
ALMOST INVARIABLY FATAL.
Be sure the antenna system is grounded so as
to provide some protection against voltage
surges and built-up static charges.
Section 810 of the National Electrical Code
(NEC) in USA and Section 54 of the
Canadian Electrical Code in Canada 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.
Antenna Grounding According to the
NEC — Refer to section 54-300 of Canadian
Electrical Code for Antenna Grounding.
Ground damps
Ground damps
Electric service
Power service grounding
equipment
electrode system (NEC
NEC: National
Art 250 Part H)
Electrical Code
Lightning
For added protection for this television
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. This will prevent
damage to the receiver due to lightning and
power-line surges.
Service
Damage Requiring Service
Unplug the set from the wall outlet and refer
servicing to qualified service personnel under
the following conditions:
Antenna lead-in
wire
Antenna discharge
unit (NEC Section
810-20)
Grounding
conductors (NEC
Section 810-20)
- When the power cord or
plug is damaged or
frayed.
- If liquid has been spilled
into the set.
- If the set has been
exposed to rain or water.
- If the set has been
subject to excessive shock
by being dropped, or the
cabinet has been
damaged.
5

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