(
.—
(
TM
5-5420-226-20-1
DETAILED TROUBLESHOOTING
PROCEDURE
Symptom-61.1
SUPPORT
SYSTEM - SMOKE GRENADE
LAUNCHER
FROM STEP
(Continued)
o45
‘ Check socket F of harness connector at push-
button unit for electrical power.
FirstTechnician
(operator’s
Station)
l
l
Set NIASTER BA’ITERY
switch OFF.
Disconnect
harneae connector
from push-
button unit.
Second Ta9mician
(Right Discharger)
l Connect
harness connector
to right dis-
charger
receptacle.
First Technician
(Operator’s
Station)
l Set MASTER
BA’ITERY
switch ON.
l Set rnultimeter
to measure
18 to 30 volts dc.
l Connect
red probe of meter to socket F of
harness connector
at pushbutton
unit, and
black probe to ground.
l Check if meter indicates
18 b 30 volts dc.
Does meter indicate 18 to 30 volts dc?
switch OFF.
l
Set MASTER
BAT-
TERY switch OFF.
l
Replacesmoke grenade
pushbutton unit (page
18.1-4).
i
m’
TO VEHICLE
GROUND
H
RIGHT DISCHARGER
TA248705
Change
1
4-554.17
