Chapter 3. MAINTENANCE INSTRUCTIONS

TM 11-5820-921-40-1

CHAPTER 3

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

Table 3-1 lists procedures, applicable paragraph references, and the frequencies of performance

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

Tables 3-2 and 3-5 list the 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.

3-10. SERVICE REQUIREMENTS PRIOR TO, DURING AND AFTER OPERATION

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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