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 the X-is obtained, remove and reinsert the AC power
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-gardless of the AC plug polarity. This chassis can
en on instrument labels and in the Product Safetybe safety-serviced only with an isolation transform-
& X-Radiation Warning note on the service dataer inserted in the power line between the receiver
chassis schematic. High voltage is maintainedand the AC power source, for both personnel and
within specified limits by close tolerance safety-re-
lated components/adjustments in the high-voltagetest equipment protection.
circuit. If high voltage exceeds specified limits, c. Some TV receiver chassis have a secondary
check each component specified on the chassisground system in addition to the main chassis
schematic and take corrective action.ground. This secondary ground system is not iso-
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. 6. Observe original lead dress. Take extra care to as-
3. Design Alteration Warning - Do not alter or addsure correct lead dress in the following areas:a.
to the mechanical or electrical design of this TV re-near sharp edges,b. near thermally hot parts-be
ceiver. Design alterations and additions, including,sure that leads and components do not touch ther-
but not limited to circuit modifications and the ad-
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
teristics of this receiver and create a hazard to thefor pinched, out of place, or frayed wiring. Check
user. Any design alterations or additions will voidAC power cord for damage.
the manufacturer's warranty and may make you, 7. Components, parts, and/or wiring that appear to
the servicer, responsible for personal injury orhave overheated or are otherwise damaged
should 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 8. Product Safety Notice - Some electrical and me-
the same type number. Do not remove, install, or
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
with a permanently attached deflection yoke; be-of a substitute replacement that does not have the
cause of potential hazard, do not try to removesame safety characteristics as the recommended
such "permanently attached" yokes from the pic-replacement part might create shock, fire, and/or
ture tube.other hazards. The product's safety is under re-
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 they comply with the recognized product safe-
and maybe safety-serviced without an isolationty and electrical codes of the countries in which
transformer only if the AC power plug is insertedthey are to be sold. However, in order to maintain
so that the chassis is connected to the ground sidesuch compliance, it is equally important to imple-
of the AC power source. To confirm that the ACment the following precautions when a set is being
power plug is inserted correctly, with an AC volt-serviced.
meter, measure between the chassis and a known
2-2L6115IMP |
ACEC
