CHAPTER 1
INTRODUCTION
Section I. GENERAL
1. Scope
a. This technical manual is published for the information and guid-
ance of all concerned It contains information on operation, organi-
zational and field maintenance, and theory of operation, as well as a
description of components. These instructions apply only to Pro-
jectors PH-637/andPH-637A/nPFP.
b. The Appendix contains a list of current references, including
technical manuals and other available publications
applicable to the
equipment.
c. In this manual, Projector PH-637( * ) / P F P r e f e r e n c e t o b o t h P H -
637/PFP and PH-637A/PFP.
2. Forms and Records
Forms used for reporting unsatisfactory conditions of Army equip-
ment and in performing preventive maintenance are listed in the
appendix.
Section II. DESCRIPTION AND DATA
3. General
Projector PH-637(*)/PFP is used to project transparencies on a
screen. The transparency projected may be a slide, a sheet of acetate
or plastic on which the operator writes or draws, or some other trans-
parent medium suitable for projection. The image is projected to a
screen behind the operator so that he can face the audience while op-
erating the equipment and lecturing. The projector consists essen-
tially of a housing that contains a projection lamp, an optical system,
a projection stage, and a projection head assembly that includes a
lens and mirror. The head assembly is mounted on a support post at-
tached to the housing. All components, with the exception of the
stand, are packed in a portable carrying case. The stand, which is
furnished only with some procurements of Projector PH-637A/PFP,
is packed in a seperate carton.
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