[Code of Federal Regulations]
[Title 21, Volume 8]
[Revised as of April 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR1020.10]

[Page 578]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES--(Continued)
 
PART 1020--PERFORMANCE STANDARDS FOR IONIZING RADIATION EMITTING PRODUCTS--Table of Contents
 
Sec. 1020.10  Television receivers.

    (a) Applicability. The provisions of this section are applicable to 
television receivers manufactured subsequent to January 15, 1970.
    (b) Definitions. (1) External surface means the cabinet or enclosure 
provided by the manufacturer as part of the receiver. If a cabinet or 
enclosure is not provided as part of the receiver, the external surface 
shall be considered to be a hypothetical cabinet, the plane surfaces of 
which are located at those minimum distances from the chassis sufficient 
to enclose all components of the receiver except that portion of the 
neck and socket of the cathode-ray tube which normally extends beyond 
the plane surfaces of the enclosure.
    (2) Maximum test voltage means 130 root mean square volts if the 
receiver is designed to operate from nominal 110 to 120 root mean square 
volt power sources. If the receiver is designed to operate from a power 
source having some voltage other than from nominal 110 to 120 root mean 
square volts, maximum test voltage means 110 percent of the nominal root 
mean square voltage specified by the manufacturer for the power source.
    (3) Service controls means all of those controls on a television 
receiver provided by the manufacturer for purposes of adjustment which, 
under normal usage, are not accessible to the user.
    (4) Television receiver means an electronic product designed to 
receive and display a television picture through broadcast, cable, or 
closed circuit television.
    (5) Usable picture means a picture in synchronization and 
transmitting viewable intelligence.
    (6) User controls means all of those controls on a television 
receiver, provided by the manufacturer for purposes of adjustment, which 
on a fully assembled receiver under normal usage, are accessible to the 
user.
    (c) Requirements--(1) Exposure rate limit. Radiation exposure rates 
produced by a television receiver shall not exceed 0.5 milliroentgens 
per hour at a distance of five (5) centimeters from any point on the 
external surface of the receiver, as measured in accordance with this 
section.
    (2) Measurements. Compliance with the exposure rate limit defined in 
paragraph (c)(1) of this section shall be determined by measurements 
made with an instrument, the radiation sensitive volume of which shall 
have a cross section parallel to the external surface of the receiver 
with an area of ten (10) square centimeters and no dimension larger than 
five (5) centimeters. Measurements made with instruments having other 
areas must be corrected for spatial nonuniformity of the radiation field 
to obtain the exposure rate average over a ten (10) square centimeter 
area.
    (3) Test conditions. All measurements shall be made with the 
receiver displaying a usable picture and with the power source operated 
at supply voltages up to the maximum test voltage of the receiver and, 
as applicable, under the following specific conditions:
    (i) On television receivers manufactured subsequent to January 15, 
1970, measurements shall be made with all user controls adjusted so as 
to produce maximum x-radiation emissions from the receiver.
    (ii) On television receivers manufactured subsequent to June 1, 
1970, measurements shall be made with all user controls and all service 
controls adjusted to combinations which result in the production of 
maximum x-radiation emissions.
    (iii) On television receivers manufactured subsequent to June 1, 
1971, measurements shall be made under the conditions described in 
paragraph (c)(3) (ii) of this section, together with conditions 
identical to those which result from that component or circuit failure 
which maximizes x-radiation emissions.
    (4) Critical component warning. The manufacturer shall permanently 
affix or inscribe a warning label, clearly legible under conditions of 
service, on all television receivers which could produce radiation 
exposure rates in excess of the requirements of this section as a result 
of failure or improper adjustment or improper replacement of a circuit 
or shield component. The warning label shall include the specification 
of operating high voltage and an instruction for adjusting the high 
voltage to the specified value.

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