HOW TO USE THE TROUBLESHOOTING CHARTS-continued

TM 11-6625-2975-40

2-16. HOW TO USE THE TROUBLESHOOTING CHARTS. (CONT)

The preceding illustration is an example of a logic flow chart. Refer to the Illustration while reading the

following information.

START

Each chart has a start segment, indicating the start of the troubleshooting procedure.

TEST PROCEDURE INSTRUCTIONS

Test procedure instructions appear in a rectangular box. These instructions usually contain specific

test points to be probed.

DECISION DIAMOND

As a result of a particular test point probe, some electrical value should be observed, such as a volt-

age indication on a piece of test equipment. The decision diamond defines what value should be

observed. and permits a YES or NO decision in response to what is observed.

TROUBLESHOOTING FLOW LINE

Troubleshooting flow lines provide direction to successive steps in the Iogic chart. An arrow at the end

of each flow line indicates the next step in the troubleshooting chain.

CORRECTIVE ACTION OR ADDITIONAL INSTRUCTION

A corrective action box or additional instruction box always follows a decision diamond. If a test set

response does not meet the standard set in the decision diamond, the appropriately marked flow line

from the decision diamond will usually be followed to a corrective action box. If the test set response

meets the standard, the flow line will be followed to an additional instruction box, which wiII either

continue the troubleshooting procedure or refer to the next test in the sequence.

INTERNAL CONNECTOR IDENTIFIER

There are two sizes of circular identifiers used in the troubleshooting charts. The smaller of the two Is

the Internal connector identifier. The Internal connector identifier indicates a continuation of the pro-

cedure to another sheet In the same troubleshooting chart. The sheet on which the procedure Is con-

tinued contains a corresponding identifier that Is, a small circle in which the same number Is printed.

The number in the circle indicates on which sheet the test procedure continues. In the sample chart,

for example, the NO branch of the decision diamond flows to an identifier containing a 2. This means

that the procedure Is continued on sheet 2, at the small circle containing 2. If there Is more than one

connector on a sheet, a letter wiII be added to the sheet number (ie, 1A).