TM 5-5420-226-20-1
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(
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DETAILED TROUBLESHOOTING
PROCEDURE
Symptom-5 1.1
SUPPORT SYSTEM - SMOKE GRENADE LAUNCHER
FROM STEP
(Continued)
Check
firing pins inleft discharger barrels 1,2,
and 5 for electrical power.
First Technician (Operators Station)
l
Second
l
l
l
Press and hold RIGHT button on pushbutton
unit.
Technician (Left Discharger)
Connect red probe of meter to pin in bottom
of left discharger barrel 1, and black probe to
ground.
Check if meter indicates 18 to 30 volts dc.
Repeat above steps for discharger barrels 2
and 5.
First Technician (Operators Station)
l Release RIGHT button on pushbutton unit.
Does meter indicate 18 to 30 volts dc at all
three pins?
l
Check if any pin has electri-
ca1power.
l
Does meter indicate 18 to
30 volts dc at any pin?
(
LEFT
DISCHARGER
We
Return
grenade
launch-
er to service.
l
Set GRENADE POWER
switch on power control
box OFF.
l
Set MASTER BATTERY
switch OFF.
TA248699
Change 1
4-554.11