Chapter 6. GENERAL SUPPORT MAINTENANCE

TM 11-6130-377-14

CHAPTER 6

GENERAL SUPPORT MAINTENANCE

Section I. GENERAL REQUIREMENTS

required to troubleshoot, test, repair, and adjust the

6-1. Scope of General Support Maintenance

inverter at the general support maintenance level.

a. This chapter contains instructions covering

general support maintenance of the inverter. It includes

Item

National Stock No.

component location diagrams of the inverter and of the

Voltmeter, Digital AN/GSM-64

6625-00-870-2264

inverter drive subassembly A1A2. Section I of this

Multimeter TS-352B/U

6625-00-242-5023

chapter identifies the test equipment and tools required to

Oscilloscope AN/USM-281A

6625-00-053-3112

perform general support maintenance.

Counter, Electronic AN/USM-207

6625-00-911-6368

Distortion Analyzer TS-723/U

6625-00-668-9418

b. Section II contains general support trouble-

Variable DC Power Source, Deltec Part

shooting procedures. The procedures are a continuation

No. 2592, or equal (dc power source

of those covered at operator level to a higher

115 volts, 70 amperes, plus a

maintenance level.

variable control, 100 to 150 volts dc)

c. Section III contains repair

procedures

for

Load Bank. Deltec Part No. 2591 or

equal, (dummy load resistors 5000

replacing defective component parts.

watts)

d. Section IV contains the calibration and

Tool Kit, Electronic Repairman TK-

5180-00-605-0079

adjustment procedures required to maintain the inverter at

100/U

the general support maintenance level and to determine

Tool Kit, Electronic Repairman TK-

5180-00-610-8177

that the repaired equipment is performing satisfactorily for

105/U

return to users.

Torque Wrench, range 200 to 400

inches pounds

6-2. Tools and Test Equipment Required for

Silicone dielectric compound (GE 641

Maintenance

or equal)

500 volt ac RMS high-pot generator

The following chart lists the test equipment and tools

Section II. TROUBLESHOOTING

shooting procedures for the inverter are contained in

WARNING

troubleshooting chart (para. 6-5b).

To avoid injury and possible death of

6-4. Organization of Troubleshooting Procedures

personnel, use extreme caution with

all

components

marked

"HIGH

a. General. The first step is servicing a defective

VOLTAGE." Ensure that all capacitors

inverter is to sectionalize the fault to the major unit

are discharged after power is removed

responsible for abnormal operation. The second step is to

and do NOT attach test equipment

localize the fault to a group of components or circuits

with the inverter operating.

within the faulty unit. After the fault has been localized, it

must be isolated to a single component, wire, or piece

6-3. General

part that is defective.

Troubleshooting procedures described in this section

b. Sectionalization. Use the checks listed in (1)

provide maintenance personnel with a systematic method

of isolating troubles within the inverter. The trouble-

Change 1

6-1