Test Procedures.

TM 55-4920-430-13

Function

Specification

Equipment

Phase testing

Signal Test Aid

Local Fab

Resistance measurement

Resistance Test Aid

Local Fab

4-43. Test Procedures.

These tests ensure the performance of all circuits of the test set but are organized so that the perform-

ance of a particular test circuit can be evaluated. In addition, the troubleshooting procedures in sec-

tion I are correlated to this test by malfunction description. Perform the tests in the order in which they

are presented.

a. Continuity Tests (Power Disconnected). Using a multimeter, set to Rx 1, measure the resistance in

the safety ground circuit between POWER receptacle J7 pin B and GND LUG J10. Resistance shall be

0 ohm.

b. Resistance Checks (Power Disconnected).

(1) Measure resistance between receptacle pins as follows. Use a multimeter set to a range which

shows the reading below half scale.

NOTE

Receptacles J1 and J3 are marked AFCS

Resistance (ohms)

Receptacle Pins

50 to 62

(a) J1-F to J1-G

243 to 297

(b) J1-P to J1-R

74 to 90

900 to 1100

(d) J3-F to J3-AA

900 to 1100

(e) J3-v to J3-C

558 to 682

(f) J3-c to J3-C

2160 to 2640

(g) J3-NN to J3-C

900 to 1100

(h) J3-g to J3-y

c. Connection Procedures.

(1) Check that the test set controls are at their initial settings. (Refer to table 2-2.)

(2) Connect cable plug P1 of W7 to test set POWER receptacle J7. Connect plug J2 to a 115-volt

400-Hz ac power source. Connect cable plug J3 to a 28-volt dc power source.

NOTE

Do not connect any other cables to the test set.