TM 11-5821-333-30
3-9. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 2. OUTPUT CHECKS
a. Set uut switches:
a. No response.
FUNCTION
SQ ON
PRESET
MAN
IFM-RF PWR
OFF
MODE
HOM
b. Set S3 on test adapter to 7 and read DMM.
c. Set S3 on test adapter to 8 and read DMM.
d. Set uut MODE switch to SC.
e. Check LAMP 4 on test adapter.
f. Check uut display.
g. Set test adapter switches:
S3
9
TEST EQUIPMENT
SELECTOR
Ics
h. On uut, set FUNCTION switch to SQ OFF.
Listen to headset.
i.
Set S3 on test adapter to 10.
j.
Vary uut VOL control and listen to noise in
headset.
k. Set TAKE CTRL switch on test adapter to RT.
l.
Vary VOL control on uut.
m. Set test adapter switches:
S3
11
TEST EQUIPMENT
SELECTOR
DMM
TAKE CTRL
RCU
n. Set uut FUNCTION switch to RXMT. Read
DMM.
b. Greater than 26 V dc. If not, go to chart 8.
c. Greater than 26 V dc. If not, power supply
(A4) is bad.
e. LAMP 4 is lit. If not go to chart 9.
f. Response:
If not, W2 flex cable assembly is bad.
g. No response.
h. Noise is present. If not, go to chart 10.
j.
A changing noise level is present. If no
noise is heard, go to chart 11. If noise is
heard but does not change, go to chart
12.
l.
Noise level in headset does not change. If
it changes, power supply (A4) is bad.
m. No response.
n. DMM reads 6.70 to 6.80 V dc. If not, go to
chart 13.
3-9
