CHAPTER 2. TROUBLESHOOTING APPROACH - TM-9-4931-381-14-P-10105

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

CHAPTER 2

TROUBLESHOOTING APPROACH

2-1.

General. To troubleshoot the test set with this volume the following three steps must

be done:

a. Run the operator assisted self test (chapter 6). If the operator assisted self test will

not run, then find that fault symptom in the fault symptom index (chapter 4).

b. Find the fail code in the fail code index (chapter 6), then go to the troubleshooting

procedure that is listed with the fail code.

c. Do the troubleshooting procedure. It will tell you what parts to replace. It will also

tell you when and where to return to the operator assisted self test (chapter 6).

2-2.

Identifying the Problem. Test set problems are usually found by doing the

operator assisted self test procedure. Even if a problem is found while the test set is

being used to check the tank electrical system components, the test set operator assisted self

test should be done to make sure which part is causing trouble. The operator assisted self test

refers to the fail code index (chapter 6) when a problem is found. The fail code index will refer

you to the proper troubleshooting procedure. The troubleshooting procedure will take you

through the steps to find and repair the fault. The sequence of steps to be done is as follows:

a. Do the operator assisted self test (chapter 6). If a fail code appears on the

message display, go to the fail code index (chapter 6).

b. Find the fail code in the fail code index (chapter 6). The second colurnn of the fail

code index gives the corrective action. Sometimes the corrective action is listed in the fail

code index; otherwise you will be referred to a figure number and sheet number in

troubleshooting (chapter 7).

c. Go to the indicated troubleshooting procedure (chapter 7). Perform the

procedure. Replace any parts that the troubleshooting procedure tells you to replace.

When test equipment is required for a troubleshooting procedure or in the course of the

operator assisted self test, refer to operator's manual for test equipment being used. The

troubleshooting procedures will refer you to the proper maintenance procedure in volume

IV that tells you how to replace apart.

d. The troubleshooting procedure will send you back to the operator assisted self

test after you have replaced the bad part or the procedure will end with a decision to send the

test set to depot maintenance.

Volume Ill

Para. 2-1

2-1/(2-2 blank)