EQUIPMENT INSTRUCTIONS

TM 11-5820-401-34-3/0987-LP-432-3060

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HOW TO USE TROUBLESHOOTING CHARTS. (CONT)

The preceding illustration is a sample portion of a troubleshooting logic flow chart. Refer to the

illustration while reading the following information.

START

Each individual chart contains a start segment indicating the start of the troubleshooting procedure.

EQUIPMENT INSTRUCTIONS

Equipment instructions are contained in a rectangular box. They provide details concerning proper

hookup of test equipment and correct control settings necessary to perform the troubleshooting

procedure.

The initial equipment instructions found at the beginning of each troubleshooting chart reference a

sheet number where an equipment test setup diagram can be found. The sheet number is located at

the top of each page of the troubleshooting chart, next to the title.

Within a troubleshooting procedure, many changes of equipment control settings, and even hookups,

are often required. These changes are detailed in the equipment instruction boxes. At any step in the

troubleshooting chart, the equipment status is always that defined by the nearest equipment

instruction box in the troubleshooting chain.

TEST PROCEDURE INSTRUCTIONS

These instructions usually contain details covering specific receiver 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

voltage 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 logic chart. An arrow at the end

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

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 procedure to another sheet in the

troubleshooting flow chart. The sheet on which the procedure is continued contains a corresponding

identifier, that is, a small circle in which the same number and letter are printed.

For example in the sample illustration, the "NO" branch of the decision diamond flows to the identifier

containing 1A SH 2. This means that the procedure is continued on sheet 2, at the small circle

containing 1A.

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