TM 11-5820-890-20-1
SECTION III
PRINCIPLES OF MAINTENANCE OPERATION
1.18.
USE OF MAINTENANCE ALLOCATION CHART (MAC). (See TM 20-2)
The MAC gives you the authority and responsibility for doing maintenance tasks on the RT-1523 series radio
and ancillary equipment. There are 12 maintenance functions: inspect, test, service, adjust, aline, calibrate,
remove, install, replace, repair, overhaul, and rebuild. You will only do these six: inspect, test, service, remove,
install, and replace. These functions are marked with an “0” in the maintenance category column.
1.19.
UNSCHEDULED MAINTENANCE.
There is no scheduled (preventive) unit maintenance for the RT-1523 series radio. Maintenance will be
performed only when the equipment fails.
1.20.
TROUBLESHOOTING.
a.
Procedure. The first step is to identify the problem. That is done by performing the prescribed
Operational Check, which will locate the fault or specify a Troubleshooting Flowchart to use.
b.
Flowchart Symbols. The following standard symbols are used in the flowcharts. Become familiar with
these symbols so that you can quickly troubleshoot your equipment. Read the explanation and be
familiar with each so that you can readily use the flowcharts.
Test Procedures Start. Indicates start of the test procedure.
Test Procedure Flow Line. Indicates direction of the procedure flow.
Test Procedure instruction. Gives instructions for doing a specific test.
Decision. Indicates that a decision must be made (YES or NO) to answer a question about the previous
test. Path taken depends on the answer (YES or NO).
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