ing is performed that involves B+, horizontal de-earth ground. If a voltage reading in excess of 1.0V
flection or high voltage. Correct operation of theis obtained, remove and reinsert the AC power
X-radiation protection circuits also must be recon-plug in the opposite polarity and again measure
firmed each time they are serviced. (X-radiationthe voltage potential between the chassis and a
protection circuits also may be called "horizontalknown earth ground.
disable" or "hold down.") Read and apply the high b. Some TV receiver chassis normally have 85V
voltage limits and, if the chassis is so equipped,AC(RMS) between chassis and earth ground re-
the X-radiation protection circuit specifications giv-
en on instrument labels and in the Product Safetygardless of the AC plug polarity. This chassis can
& X-Radiation Warning note on the service databe safety-serviced only with an isolation transform-
chassis schematic. High voltage is maintaineder inserted in the power line between the receiver
within specified limits by close tolerance safety-re-and the AC power source, for both personnel and
lated components/adjustments in the high-voltagetest equipment protection.
c. Some TV receiver chassis have a secondary
circuit. If high voltage exceeds specified limits,ground system in addition to the main chassis
check each component specified on the chassisground. This secondary ground system is not iso-
schematic and take corrective action.lated from the AC power line. The two ground sys-
2. Read and comply with all caution and safety-relat-tems are electrically separated by insulation
ed notes on or inside the receiver cabinet, on thematerial that must not be defeated or altered.
receiver chassis, or on the picture tube.
3. Design Alteration Warning - Do not alter or add 6. Observe original lead dress. Take extra care to as-
to the mechanical or electrical design of this TV re-sure correct lead dress in the following areas: a.
ceiver. Design alterations and additions, including,near sharp edges, b. near thermally hot parts-be
but not limited to circuit modifications and the ad-sure that leads and components do not touch ther-
dition of items such as auxiliary audio and/or videomally hot parts, c. the AC supply, d. high voltage,
output connections, might alter the safety charac-and e. antenna wiring. Always inspect in all areas
for pinched, out of place, or frayed wiring. Check
teristics of this receiver and create a hazard to theAC power cord for damage.
user. Any design alterations or additions will void 7. Components, parts, and/or wiring that appear to
the manufacturer's warranty and may make you,have overheated or are otherwise damaged
the servicer, responsible for personal injury orshould be replaced with components, parts, or wir-
property damage resulting therefrom.ing that meet original specifications. Additionally,
4. Picture Tube Implosion Protection Warning -determine the cause of overheating and/or dam-
The picture tube in this receiver employs integralage and, if necessary, take corrective action to re-
implosion protection. For continued implosion pro-move any potential safety hazard.
tection, replace the picture tube only with one of
the same type number. Do not remove, install, or 8. Product Safety Notice - Some electrical and me-
otherwise handle the picture tube in any mannerchanical parts have special safety-related charac-
without first putting on shatterproof gogglesteristics which are often not evident from visual
equipped with side shields. People not soinspection, nor can the protection they give neces-
equipped must be kept safely away while picturesarily be obtained by replacing them with compo-
tubes are handled. Keep the picture tube awaynents rated for higher voltage, wattage, etc.. Parts
from your body. Do not handle the picture tube bythat have special safety characteristics are identi-
its neck. Some "in-line" picture tubes are equippedfied by a ( # ) on schematics and in parts lists. Use
of a substitute replacement that does not have the
with a permanently attached deflection yoke; be-same safety characteristics as the recommended
cause of potential hazard, do not try to removereplacement part might create shock, fire, and/or
such "permanently attached" yokes from the pic-other hazards. The Product's Safety is under re-
ture tube.view continuously and new instructions are issued
5. Hot Chassis Warning -whenever appropriate. Prior to shipment from the
a. Some TV receiver chassis are electrically connect-factory, our products are strictly inspected to con-
ed directly to one conductor of the AC power cordfirm with the recognized product safety and electri-
and maybe safety-serviced without an isolationcal codes of the countries in which they are to be
transformer only if the AC power plug is insertedsold. However, in order to maintain such compli-
so that the chassis is connected to the ground sideance, it is equally important to implement the fol-
of the AC power source. To confirm that the AClowing precautions when a set is being serviced.
power plug is inserted correctly, with an AC volt-
meter, measure between the chassis and a known
1-2-2SFTY_2 |
ACEC
FUNAI
