C8, TM 9-2350-230-12
TABLE 8-4. TROUBLESHOOTING - CONTINUED
Malfunction
Probable cause
Corrective action
MISSILE SUBSYSTEM -
Continued
120. 4. (Tracker alignment
Look into telescope. Tf
test) cannot null
checksight source spot-of-
meter using AZ or
light is not sharply defined
EL adjustment
or larger than normal,
screws, located on
there is moisture in teles-
telescope mount. -
cope or telescope mount.
Continued
Look into telescope from
outside turret to verify
that the align prism is
visible and in proper posi-
tion.
c.
Tracker or power supply
c. Listen for tracker motor. If
defective
operating, listen for rate
sensor.
ting; tracker motor not
operating. Replace
tracker. Repeat test.
Rate sensor gvros and
tracker motor not opera-
ting. Replace power
supply. Repeat test.
NOTE. With excessive
noise in turret, rate sensor
gyros and tracker motor may
be difficult to hear.
d. Signal data converter
d. Replace signal data converter
defective
Repeat test.
e.
Test checkout panel defective.
e. Replace test checkout panel.
Repeat test.
f. Telescope mount defective
f. Place EL or AZ adjustment
screws (on telescope
mount) at mid range, then
adjust the other screw for
a null on the meter. The
AZ or EL switch on test
checkout panel must be in
correct position.
8-38.3