LESSON 4
ELECTRONIC DIAGRAMS
SCOPE ....................................Application and use of wiring, cabling,
block, layout, and schematic diagrams;
use
of
and
troubleshooting charts.
CREDIT HOURS .............................2
TEXT ASSIGNMENT ..........................Attached Memorandum, para 4-1, 4-2
MATERIALS REQUIRED .......................None
SUGGESTIONS ..............................None
LESSON OBJECTIVES
When you have completed this lesson, you should:
1.
Know the purpose of each type of electronic diagram and chart.
2.
Know how and
when
to
use
the
various
charts
and
diagrams
as
aids
in
troubleshooting.
ATTACHED MEMORANDUM
4-1.
ELECTRONIC DIAGRAMS
Much of the electronic equipment in use today is very complicated.
Radio,
computers, radar, and television use many of the most intricate circuits presently
used in electronics.
The technician is not expected to remember all of the
circuits present in these equipments.
Diagrams and charts are available to help
him in maintaining and repairing the equipment. These diagrams and charts present
pertinent information about the equipment in a manner that is understandable to the
technician. The information includes voltage, resistance, and capacitance values,
and connections between components.
a. Wiring Diagrams. Military communication equipment is made as compact and
as light as its purpose will allow. However, items of electronic equipment such as
radio receivers have many components making up their various circuits and stages.
Tubes, transistors, resistors, capacitors, coils, and relays are connected by wires
to form the circuits. Some or all of the components may be mounted on component
boards with either conventional or printed wiring used to connect them.
The
component boards may be permanently mounted or they may plug into a receptacle.
The stages are connected by wires to form the complete unit.
309 L4
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