APPENDIX

1.

INTRODUCTION

This appendix contains an electrical parts list, schematic diagram,

parts location diagram and equipment warranty.

2.

ELECTRICAL PARTS LIST

All electrical and electronic parts are listed in the sequence of

their circuit numbers as shown on the schematic diagram. A brief

description of each part is given, followed by the code number of the

manufacturer and his part number. All manufacturers’ code numbers are

taken from Cataloging Handbooks H4-1 and H4-2, Federal Supply Code

for Manufacturers. These handbooks are available through Federal

Agencies. They may also be ordered directly from the Superintendent

of Documents, U. S. Government Printing Office, Washington, D.C. 20402.

We recommend that all parts having the code number 98095 be ordered

directly from Power Designs Inc. The commercial equivalents of these

parts have either wide parameter tolerances or require special factory

inspection or modification before they are suitable for use in the

power supply.

All components used in the power supply or supplied as replacements

are carefully inspected at the factory. Inspections are performed

on a 100% basis or at AQL levels in accordance with Military Specifica-

tion MIL—Q—9858 under which Power Designs Inc. has been qualified.

All semiconductors are inspected on a 100% basis. They are

inspected not only for operating parameters, but also for critical

characteristics related to reliability and predictable life expectancy.

Some of those characteristics are observed when the device is taken

beyond its normal operating regions. These test techniques have been

developed under a “predictable—reliability” program in operation at

Power Designs Inc. for the past ten years. Under this program, quality-

control procedures arc constantly revaluated and updated as new

advances are made in solid—state technology and additional experience

is gleaned from field history.

Semiconductor manufacturers are constantly modifying their

products. Complete lines are frequently discontinued to be replaced

by devices having improved gain, operating voltage levels and frequency

response. The high—gain, closed—loop DC amplifiers used in regulator

circuits are particularly sensitive to slight changes in these para-

meters. Commercial or military “equivalent” transistors used as

replacements may affect the power supply performance. Compliance

with the original specifications can be assured if replacement

semiconductors are ordered from the factory.

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