TM 5-5420-226-20-1
Symptom-49
T
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- COMMUNICATIONS
(Continued)
# Check if static
is caused by infrared
(iR)
powerpacks.
Second Technician
(Operators
Station)
l Set NIGHT VISION switch OFF.
First Technician
(Commanders
Station)
.
Wait two or three minutes for high voltage present
inside IR powerpacks
to discharge,
then ~sten for
static in radio helmet.
Did static stop when IR powerpacks
were shut off?
MASTER
CONTROL
PANEL
177*
l.c..!,.;-
D
-.,
:
~
.,.Iv
Q
Db
.
.
*a
,,.,-, .,.!(,
.!,,
7Q
?*
4
i -1
-,
. i\ / m:.
(
NIGHT VISION
SWITCH
)
l Check which IR powerpack
is causing
static.
o
l See Step
19
.
TA10722O
4-531