Section II. OPERATION UNDER USUAL CONDITIONS

TM 9-4931-363-14&P

S e c t i o n II. OPERATION UNDER USUAL CONDITIONS

c. If helicopter power is to be used, connect extension

3-4. General.

cable W5 in series with W4 and connect to helicopter

receptacle on left side of gunner's compartment.

This section contains preliminary setup and self-test

procedures.

d. Set POWER switch to ON-60 Hz if 60-Hz power is

3-5. Preliminary Setup Procedures.

used. Set to ON-400 Hz if 400-Hz power is used. Observe

that the POWER indicator illuminates.

a. Set all switches having an OFF position to OFF (fig.

3-6. Self-Test Procedures.

b. Connect the appropriate power cable from the test

set to the power sources as follows:

Perform procedures of table 3-3. If failures occur, refer

to troubleshooting procedures in Chapter 4.

(1) If a 115-volt, 60-Hz power source is to be used,

connect power cable W3 between J3 on the test set and the

power source.

3-7. Operating Instructions.

(2) If a 115-volt, 400-Hz power source is to be used,

Refer to TM 9-1270-212-14&P for additional operating

connect power cable W4 between J3 on the test set and the

instructions for the test set.

power source.

3-8