d. Summary.
You
have
covered
a
complete
procedure
to
follow
when
troubleshooting an AM receiver. As you gain experience, you'll find that you may
modify your procedure using shortcuts that will help you save time. The method by
which you attack a problem involving troubleshooting should always be the same.
Now, let's review what you should do.
Remember to make maximum use of the
equipment manual.
(1) Get an equipment manual for the specific receiver
on
which
you
are
working. Examine the schematic diagram closely.
(2) Make a complete visual inspection.
(3) Check key circuits for shorts.
(4) Make a complete operational test.
(5) Use the troubleshooting procedure outlined in the TM.
(6) Use the signal substitution method whenever applicable, to help you to
localize trouble in the receiver section.
(7) Check and replace the defective component.
(8) Then make a final test to be certain the receiver is once again in good
operating condition. The final testing procedure is also in the equipment
manual.
LESSON EXERCISES
In each of the following exercises, select the ONE answer that BEST completes
the statement or answers the question.
Indicate your solution by circling the
letter opposite the correct answer in the subcourse booklet.
1. What circuits can be eliminated from radio receivers that operate from a
battery power supply?
a. AVC and power amplifier circuits
b. MVC and power amplifier circuits
c. Rectifier and filter circuits
d. Voltage amplifier circuits
2. Selenium rectifiers are often used instead of electron tubes in rectifier
circuits because a selenium rectifier
a. can rectify both halves of the input signal.
b. does not require a filter circuit.
322 L5
42
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