CHAPTER 4. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

Figure 3-3. TS-2645 / ASN block diagram.

Figure 4-1. Insulation resistance test setup.

TM-11-6625-2634-14 TS-2644/ASN and TS-2645/ASN Manual
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CHAPTER

DIRECT SUPPORT AND GENERAL SUPPORT

MAINTENANCE INSTRUCTIONS

Section I. GENERAL

4-1. Direct Support Maintenance

a. The insulation resistance test checks the test

set and cable wiring for shorts or high voltage leaks

Maintenance at the direct support level consists of

through the insulation.

replacement of the test set fuse which is located on

b. The continuity test checks point-to-point

the panel assembly.

continuity between connectors and between front

4-2. Voltage and Resistance Measurements

panel test points and connectors.

a. No voltage measurements are required.

4-4. Tools and Test Equipment Required

b. Resistance measurements are made using a

Table 4-1 lists the tools and equipment required to

rnultimeter with an accuracy of 5 percent.

test the test set.

4-3. Bench Testing

Bench testing of the test set consists of the two tests

described below.

Table 4-1. Tools and Test Equipment Required for General Support Maintenanc

Section Il. TROUBLESHOOTING AND REPAIR

4-5. Troubleshooting Procedure

a. Lamp Replacement. Remove Iampholder

lens. Press on lamp and twist to the left to remove.

Troubleshooting the test set consists of performing

Install new lamp and replace Iampholder lens.

the testing procedure in paragraph 4-7. If any

b. Fuse Replacement. Press fuseholder cap and

abnormal test results are disclosed, return the test

twist to the left. Remove fuse. Install new l-ampere

set to depot support for repair.

fuse and replace fuseholder (cap.

4-6. General Support Maintenance

General support maintenance of the test set consists

of fuse and lamp replacements.

Section Ill. GENERAL SUPPORT TESTING PROCEDURES

c. Procedure. Perform steps of table 4-2.

4-7. General

The test procedure is arranged so that tests that do

4-9. Insulation Resistance Test

not require power application to the test set are

(fig. 4-1)

performed first. Test procedure steps shall be

a. Test Equipment and Materials. Insulation

performed in the order listed. Set all test set and test

Breakdown Test Set AN / GSM-6.

equipment controls accurately.

b. Test Connections and Conditions. Minus

4-8. Physical Tests and Inspection

(--) lead of AN / GSM-6 connected to test set

chassis. Connect AN / GSM-6 to 115 Vac, 60Hz

a. Test Equipment and Materials. None.

power source. Test set power cable shall be

b. Test Connections and Conditions. R e m o v e

disconnected from power source.

test set cover from case. The test set power cable

c. Procedure. Perform steps of table 4-3.

shall be disconnected from power source.

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