TM 5-5420-226-20-1
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(
—
.
DETAILED TROUBLESHOOTING
PROCEDURE
Symptom-6 1.1
SUPPORT SYSTEM - SMOKE GRENADE LAUNCHER
.
FROM STEP
(Continued)
Q24.
) Check firing pins in left discharger barrels 3, 4,
and 6 for electrical power.
First Technician (Operatm’s Station)
l Press and hold LEFT button on pushbutton
unit.
Second Technician (Left Discharger)
l Connect red probe of meter to pin in bottom
of left discharger barrel 3, and black probe to
ground.
l Check if meter indicates 18 to 30 volts
dc.
l Repeat above steps for discharger barrels 4
and 6.
Firat Technician (Operator’s Station)
l Release LEFT button on pushbutton unit.
Doss meter indicate 18 to 30 volts de at all
three pins?
n
I
\
-
PUSHBUTTON
+--F
UNIT
TO VEHICLE
GROUND
PIN
-
‘6
LEFT
DISCHARGER
Check if any pin has electri-
Check
firing
pins in
ca 1 power.
left discharger
barrels
1, 2, and 5 for electri-
l
Does meter
indicate
18 to
ca I power.
30 volts dc at any pin?
-
l
See sten 37.
Replace left smoke grenade
discharger (page 18. 1-25).
TA248697
Change 1
4-554.9
