Chapter 2. DIRECT SUPPORT MAINTENANCE

TM 11-5805-387-34-2

CHAPTER 2

DIRECT SUPPORT MAINTENANCE

Section I. GENERAL INFORMATION

WARNING

DEATH ON CONTACT may result from contact with high voltage in modem modules. Scope

module A2 contains 1,100 volts dc; loop battery module A5 contains 127 volts dc.

2-1. GENERAL

This chapter covers direct support troubleshooting, maintenance, and test procedures for the modem. Section I

lists the tools, test equipment, and materials needed to perform direct support maintenance. Troubleshooting and test

procedures are described In section II. Maintenance procedures are covered in section III and adjustments in section IV.

2-2. REPAIR PARTS, TOOLS, TEST EQUIPMENT, AND MATERIALS

Repair Parts: Refer to TM 11-5805-387-20P-2, and TM 11-5805-387-34P-2

Special Tools: No special tools are needed.

Tools, Test Equipment, and Materials:

TOOLS

NATIONAL STOCK NUMBER

Tool Kit, Electronic Equipment TK-100/G

Tool Kit, Electronic Equipment TK-105/G

TEST EQUIPMENT

Counter, Electronic, Digital Readout AN/USM-207

Electronic Voltmeter AN/URM-145

Generator, Signal AN/URM-127

Handset H-33/PT

Power Supply PP-3940/G

Test Set, Teletypewriter TS-799A/UGM-1

600 Ohm, 1/2 Watt Test Potentiometer

2-1