TM 9-2350-230-12
Malfunction
Probable cause
Corrective action
COMMANDER'S CUPOLA
M551A1 ONLY - Continued
81.11 Automatic
c Defective or
c Notify support
cupola align func-
- maladjusted limit
maintenance to
tion does not work -
switch in cupola
check cupola re-
continued
solver alignment
ment mechanism
mechanism limit
switches.
81.12 Cupola con-
Replace cupola/laser
tinues to oscillate
cupola/laser
control box assem-
after returning to
control box
bly (fig 10-35.2).
front position dur-
ing the automatic
align cycle.
TURRET ELECTRIC DRIVE CONTROL
a Check operation
82 Power light and
a No electrical
ready light do not
power to turret
of missile sub-
light after lamps
system; if no oper-
have been checked
ation, replace con-
tact ring. If
missile subsystem
operates, proceed
to step b.
b Replace accessory
b Defective con-
ponent in acces-
box (fig 10-4)
If
sory box
malfunction still
occurs, notify
support maintenance.
83 Power light
Defective component
Replace accessory box.
illuminates but
in accessory box
If malfunction still
ready light does
occurs, notify sup-
not illuminate
port maintenance.
84 Ready light
Defective component
Replace accessory
illuminates but
in accessory box
box.
earlier or later
than timer toler-
ance (18-22 sec-
onds) .
8-32.2