TM 11-5820-921-40-1
MAINTENANCE INSTRUCTIONS
SECTION I
INTRODUCTION
NOTE
Maintenance Kit OA-9163/GRC-l93A is available as a Maintenance Test Bed.
INTRODUCTION
This chapter describes the intermediate maintenance effort applicable to the power amplifier.
3-2.
Included herein are maintenance scheduling, tools and equipment, safety precautions, disassembly and
assembly, inspection, and various troubleshooting, alignment, and adjustment data for the power amplifier.
Tabular data, illustrations, and references to the theoretical explanations of chapter 2 are included to aid
the technician in a complete understanding of the procedures and equipment.
This chapter is arranged such that the troubleshooting and field maintenance sections are integrated
3-3.
with one another. The maintenance procedures contained in this chapter use input and output signals,
switching and control, and power sources provided by various components of Radio Set AN/GRC-193, of
which Power Amplifier AM-6545/GRC-193 is a component. If it is desired to test the power amplifier not
using Radio Set AN/GRC-193 as a test standard, the inputs and outputs can be duplicated using laboratory
equipment. Refer to figure 3-1 for specific details.
SCHEDULED MAINTENANCE ACTION INDEX
3-5.
for all maintenance instructions (inspection, repair, adjustments, etc.) contained in this chapter.
SECTION II
TOOLS AND EQUIPMENT
TOOLS, CLEANING SOLVENTS, LUBRICANTS, AND OTHER CONSUMABLE SUPPLIES
3-7.
respectively, needed for maintenance of the power amplifier.
MAINTENANCE RECORDS AND REPORT FORMS
3-9.
See paragraph O-3 for maintenance, records and reports.
3-11. To ensure that the equipment is ready for operation at all times, it must be inspected systematically
before operation, during operation, and after operation, so that defects may be discovered and corrected
before they result in serious damage or failure. The necessary preventive maintenance procedures will be
performed before operation. Defects discovered during operation of the unit will be noted for future
correction, to be made as soon as operation has ceased. Stop operation immediately if a deficiency is
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