C6, TM 9-2350-230-12
TABLE 8-4. TROUBLESHOOTING - CONTINUED
Malfunction
Probable cause
Corrective action
MISSILE SUBSYSTEM
Continued
121.1. Tracker lamp fails
a.
Defective signal data con-
a.
Replace the signal data con-
to glow when the ALIGN
verter
verter.
and ERROR levers are
in the fully left position
b. Defective test checkout panel.
b.
Replace the test checkout
and the system test
panel.
switch is in the up posi-
tion.
121. 2. Sig data conv lamp
a.
Defective signal data con-
a. Replace the signal data con-
fails to glow when the
verter
verter.
ALIGN lever is posi-
tioned fully right and
b.
Defective test checkout panel.
b.
Replace the test checkout
the ERROR lever is
panel.
fully left with the
system test switch in
the up position.
121. 3. Test checkout panel
a. Defective test checkout panel.
a.
Replace the test checkout
fails to reset; ALIGN
panel.
lever fails to move
fully left; tracker
b.
Vehicle firing circuit
b.
Notify support maintenance.
motor fails to stop
defective.
running within 3
seconds after the fire
c.
Defective tracker mount
c.
Notify support maintenance.
trigger is pulled and
ALIGN lever is fully
right and system test
switch is in the up
position.
M81/El GUN-LAUNCHER
122. Insufficient current
a. Firing probe assembly front
a.
Clean contact with fine steel
available at firing
contact corroded and/or
wool or replace firing
probe to fire
defective
probe if cracked or
weapon
defective (fig. 11-13).
b.
Firing probe contact assem-
b.
Make adjustment and per-
bly not adjusted properly
form continuity check
c.
Open or grounded firing
c. Check continuity between
circuit in electrical
plug at firing probe (P107,
wiring harness
circuits a and b) and large
input power receptacle
(P102, circuits a and p)
respectively. Replace
harness if defective.
(See caution note below. )
8-39
