CHAPTER 1. GENERAL - TM-9-4931-381-14-P-10103

TM 9-4931-381-14&P-1

CHAPTER 1

GENERAL

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Scope. This volume contains the troubleshooting information that wiII help find out

why the test set is not working properly. The procedures will lead too replaceable item or part

that is bad, and tell you what to do with it.

Organization of Troubleshooting Information. If the test set breaks down during

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operation, it wiII not act the way the procedures say it is supposed to. This is called a fault

symptom. To find out what to do about a fault symptom, go to the fault symptom index in

chapter 4 and look for a symptom that describes the way the test set is acting. The second

column of the fault symptom index gives a figure number for a troubleshooting procedure that

will help locate the bad part. Other chapters in this volume give the following information.

a. Chapter 2. Troubleshooting Approach. This chapter explains how to use

troubleshooting information in chapters 3 through 8 of this volume.

b. Chapter 3. Troubleshooting Roadmap. This chapter lists alI the replaceable

items in the test set that can be checked by using the troubleshooting procedures of this

volume.

c. Chapter 4. Fault Symptom Index. The fault symptom index Iists the fault

symptoms that can be seen when the test set breaks down. For each fault symptom listed in

the index, a troubleshooting procedure is given (figures 4-2 through 4-11) which will locate the

bad item in the test set.

d. Chapter 5. Sample Troubleshooting Procedure. A sample troubleshooting

procedure is given in this chapter. Instructions are included to explain how to use the

procedures.

e. Chapter 6. Operator Assisted Self Test Procedure. This chapter contains the

test set operator assisted self test procedure. It is used to find out if the test set is

working right. It should be used anytime the test set has been repaired, or after any part

of the test set is replaced. Chapter 6 also contains a fail code index. This index lists the fail

codes that may appear during operator assisted self test and refers the operator to the

appropriate troubleshooting procedure in chapter 7.

f. Chapter 7. Troubleshooting Procedures. Chapter 7 contains troubleshooting

procedures for faiI code outputs in chapter 6.

g. Chapter 8. Test Set Diagrams. This chapter contains electrical diagrams and wiring

lists for use with the troubleshooting procedures.

Volume Ill

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