Esquematicos de electronica

SUBCOURSE OD1725

EDITION B

BASIC SCHEMATIC INTERPRETATION

BASIC SCHEMATIC INTERPRETATION Subcourse Number OD1725 Edition B March 1996 United States Army Ordnance Center and School 5 Credit Hours SUBCOURSE OVERVIEW This subcourse presents basic schematic interpretation in three parts. Part A identifies basic symbols used in circuit schematics. Part B discusses typical componentcharacteristics and their functional use within a circuit. Part C describes the methods to determine reference designators and the procedures for wire tracing in a circuit. Part C also includes a wire tracing exercise. Terminal Learning Objective Actions: You will recognize the various symbols used in schematic diagrams of Army technical manuals. You will understand their characteristics and how theyfunction in typical circuit applications. You will also perform wire tracing in a practical wire tracing exercise using extracts from an Army technical manual.

Conditions: You will be given the subcourse booklet with extracts from TM 9-5855-267-24. Standards: You will perform wire tracing procedures in accordance with TM 9-5855-267-24.

There are no prerequisites for this subcourse. The followingpublications are the references for this subcourse: FM 11-60 FM 11-61 Basic Principles, Direct Current, November 1982. Basic Principles, Alternating Current, November 1982. i OD1725

FM 11-62 FM 11-72 TM 9-5855-267-24 ANSI Y32.2

Solid State Devices and Solid State Power Supplies, September 1983. Digital Computers, September 1977. Sight, Tank Thermal AN/VSG-2, December 1980. Graphic Symbolsfor Electrical and Electronics Diagrams, October 1975.

This subcourse contains information which was current at the time it was prepared. In your own work situation, always refer to the latest publications. The words "he," "him," "his," and "men," when used in this publication, represent both the masculine and feminine genders unless otherwise stated.

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TABLE OF CONTENTSSection Subcourse Overview.......................................... Lesson: Basic Schematic Interpretation.................... Part A: Part B: Part C: Identification of Electrical and Electronic Schematic Symbols............ Component Characteristics and Functional Use.......................... Wire Tracing............................ Page i 1 2 22 30 36 38 49 51 53

PracticeExercise................................. Answer Key and Feedback........................... Appendix A: Appendix B: Appendix C: List of Acronyms and Abbreviations........... List of Designation Letters.................. Extracts from TM 9-5855-267-24...............

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LESSON BASIC SCHEMATIC INTERPRETATION LEARNING OBJECTIVE Actions: a. b. Identify thesymbols used in typical diagrams of Army technical manuals. schematic

Describe the characteristics and circuit functions of electrical and electronic components used in Army fire control instruments. Wire trace a circuit using the specified in an Army technical manual. procedures

c. Conditions: Standards:

You will be given the subcourse booklet with extracts from TM 9-5855-267-24. You willperform the wire tracing accordance with TM 9-5855-267-24. procedures in

INTRODUCTION One of the essential elements of an effective unit is the ability to effectively repair malfunctioning equipment and return it to service quickly. For the fire control systems repairer (MOS 45G), this often means the adjustment, replacement, or repair of the electrical and electronic components within the firecontrol instruments and their associated test equipment. In order for the technician to understand the operation of the equipment and the procedures for troubleshooting and repair, he must be able to identify components and understand how they function within that particular circuit. He must also be able to trace signals through and between circuits. This lesson identifies typical symbols used...