MIL-DTL-87929D
critical test points accessible at front panel connectors. Where the design of the equipment includes built-in
test capability, tests performed using this capability shall be identiied but not outlined in detail. Any
function requiring the participation of maintenance personnel, or interpretation of test results, shall be
included in detail. Instructions required to determine the operability of the design built-in test circuits and
components, fault isolation and repair instructions, shall be included. Symbols shall be as marked on the
equipment, or as they appear on applicable engineering drawings. Voltages, waveforms, etc., should be
placed adjacent to the test point and if required may be in tabular form. Indiscriminate use of test points
shall be avoided; for example, test point identiication shall normally be restricted to signal tracing test
points and voltage and continuity check points. The following test point identiication system shall be used:
3.3.11.1 Major test points. A star-enclosed Arabic numeral,
, is used to identify and designate the test
points used in checking the overall functions of, and localizing trouble to individual components, or groups
of components. Major test points are identiied on schematic wiring diagrams, tables, charts, and illustrations
by use of the Arabic numerals 1, 2, 3, etc., enclosed in a star; but shall be referred to in the text as test
point 1, test point 2, etc. Typical examples of major test points are:
a. The input terminals for the supply source voltage.
b. The high voltage output terminals of the equipment s power system.
c. The signal input terminals of the equipment.
d. The signal output terminals of the equipment.
e. The major points of power or voltage distribution within the equipment.
3.3.11.2 Secondary test points. An encircled capital letter,
, is used to identify and designate the test
points used in isolating causes of subnormal performance within a speciic assembly or subassembly of the
equipment. Secondary test points are identiied on schematic wiring diagrams, tables, charts, diagrams,
and illustrations by use of capital letters, A, B, C through Z; AA, AB through AZ; BA, BB through
BZ, etc., enclosed in a circle; but shall be referred to in the text as test point A, test point B, etc.
Typical examples of secondary test points are:
a. Circuit supply voltage terminals.
b. Signal output points used in checking the gain of a stage or group of stages.
3.3.11.3 Minor test points. An encircled capital letter and Arabic numeral,
, is used to identify and
designate the test points used in isolating causes of abnormal indications within a speciic circuit of the
equipment. Minor test points are identiied on schematic wiring diagrams, tables, charts and illustrations by
use of a capital letter and Arabic numeral, Al, A2, etc., enclosed in a circle; but shall be referred to in the
text as test point Al, test point A2, etc. Different letters shall be assigned to each component. Typical
examples of minor test points to be so designated are:
a. Speciic voltage and resistance check points.
b. All other points used in checking for trouble in a speciic circuit.
3.3.11.4 Assignment of symbols. Test point identiication symbols on the schematic wiring diagrams shall be
assigned consecutively throughout the composite equipment. Once assigned, a symbol shall not be reassigned
to another test point. An explanation of the use of test points shall appear in the Foreword WP of the manual.
3.4 Arrangement. Appendix A.1 provides information for obtaining the DTD for electronic delivery
of the standard WP manual.
3.4.1 Manual arrangement.
The technical manual(s) shall be arranged in the following order:
a. Front Matter (see 3.4.1.1).
b. Alphabetical Index (WP 001 00) (see 3.4.3.1).
c. Foreword (WP 002 00) (see 3.4.3.2).
d. Master lists of special tools, test equipment, and consumables (WP 003 00) (see 3.4.3.3).
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