DIRECT 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.
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:
NATIONAL STOCK NUMBER
Tool Kit, Electronic Equipment TK-100/G
Tool Kit, Electronic Equipment TK-105/G
Counter, Electronic, Digital Readout AN/USM-207
Electronic Voltmeter AN/URM-145
Generator, Signal AN/URM-127
Power Supply PP-3940/G
Test Set, Teletypewriter TS-799A/UGM-1
600 Ohm, 1/2 Watt Test Potentiometer