Chapter 3. GENERAL SUPPORT MAINTENANCE

TM 11-5805-387-34-2

CHAPTER 3

GENERAL SUPPORT MAINTENANCE

Section I. GENERAL INFORMATION

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.

3-1. GENERAL

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

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

procedures are described in section II. Maintenance procedures are covered in section III. General support adjustment

procedures will be the same as those for direct support (chapter 2, section IV).

3-2. REPAIR PARTS, TOOLS, TEST EQUIPMENT, AND MATERIALS

General support maintenance requires the same repair parts, tools, test equipment, and materials as for direct

Section II. TROUBLESHOOTING

3-3. GENERAL INFORMATION

The general support troubleshooting chart supplements the direct support troubleshooting chart. Refer to chapter 2,

section II for troubleshooting definitions and procedures.

TEST POINT DATA:

Paragraph 3-7.

Use the troubleshooting chart to isolate defective parts.

REMOVING AND REPLACING PARTS:

Section III.

ADJUSTING AND ALIGNING MODULES:

Chapter 2, section IV.

NOTE

When conducting tests, investigate the possibility of intermittent troubles. Jarring or tapping the

equipment may expose this type of problem. Do not try to correct trouble this way. Check the

modem's wiring and connections to eliminate trouble caused by loose connections.

3-1