6.1
GENERAL
SECTION 8
APPENDIX
This section contains the schematic diagram, a location
of
components drawing and
an
electrical parts list.
All electrical parts are listed in the sequence
of
their
circuit
designation numbers as shown
on
the schematic diagram.
All components used in the power supply or supplied as replacements are carefully in·
spected at the factory. Inspections are performed on a 100% basis or at AOL levels to
Military Specification MIL·0·9858 under which Power Designs, Inc. has been qualified.
All semiconductors are inspected on a 100% basis, not only for operating parameters, but
also for critical characteristics related to reliability and predicatable life expectancy. Some
of these characteristics are observed when the device is taken beyond its normal operating
regions. These test techniques have been developed under a "predictable reliability" pro·
gram in operation at Power Designs, Inc. for the past twelve years. Under this program, quali·
ty control procedures are constantly revalued and updated as advances are made in solid
state technology and experience is gained from field history.
Semiconductor manufacturers are continually modifying their products. Complete lines are
discontinued to be replaced by devices having improved gain, operating voltage levels and
frequency responses. The high gain, closed loop
DC
amplifiers used in regulator circuits are
particularly sensitive to slight changes in these parameters. Commercial or military
"equivalent" transistors may affect the performance
of
the power supply.
We
can assure
compliance with the original specifications
if
replacement semiconductors are ordered from
the factory.
All replacement semiconductors are processed and stocked at the factory in insure com-
plete interchangeability with the devices in the original equipment.
When ordering replacements, please identify the device as thoroughly as possible, giving the
model and serial number
if
available.
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12·
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