TM
5-5420-226-20-1
DETAILED TROUBLESHOOTING
PROCEDURE
Symptom-51.1
SUPPORT SYSTEM - SMOKE GRENADE
LAUNCHER
FROM STEP
(Continued)
Check
harness
forcontinuity
between
socket
C
of connector
at left discharger
and socket
D of
connector
at pushbutton
unit.
First Technician
(Operators
Station)
l
l
l
l
l
Second
l
l
Set GRENADE
POWER
switch OFF.
Set MASTER
BATIERY
switch OFF.
Remove
harness connector
from pushbutton
unit.
Set multimeter
ta OHMS XI scale and zero
meter.
Connect black probe of meta
to socket D of
harness connector
at pushbutton
unit,
Technician
(Left Discharger)
Connect
red probe of meter to socket C of
harness connector
at left discharger.
Check if meter indicates
continuity.
Does
meter
indicate
continuity?
-
nector
to jack
on left
discharger.
l
Replace smoke
grenade
pushbutton
unit (page
18.1-4).
GRENADE 1
m.
POWER
Cl
L4
I
SWITCH
PUSHBUTTON
~
//
UNIT
U
r
TA248716
4-554.28
Change
1