TM 11-5821-333-30
4–11. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 1. SELF TEST
a. Set up equipment using figure 4-2.
b. Turn power supply on and set to 28 V dc.
c. Listen to headset and set DC switch on test
adapter to ON.
d. Set test adapter:
DC
OFF
S5,
S6
2
e. Listen to headset and set DC switch on test
adapter to ON.
Step 2. OUTPUT CHECKS
a. Set test adapter:
S 5
1
S 6
2
PTT(S8)
UUT
b. Talk into headset. Listen to audio and check
lamps on test adapter.
c. Set test adapter:
PTT (S8)
OFF
PTT(S13)
UUT
d. Talk into headset. Listen to audio and check
lamps on test adapter.
a.
No response.
b. No response.
c. Short two-tone beep is heard. Continuous
1200-Hz tone is not heard.
If not, go to chart 1.
d. No response.
e. Two-tone beep is not heard. If heard, go to
chart 2.
a. No response.
b. Audio is clear and intelligible and
lamps are as follows:
LAMP 2
off
LAMP 3
off
LAMP 5
on
LAMP 7
off
LAMP 8
off
If not, go to chart 3.
c. No response.
d. Audio is clear and intelligible and
lamps are as follows:
LAMP 7
on
LAMP 8
on
If not, go to chart 4.
4 -9
