TM 9-1240-380-34
FAULT SYMPTOM INDEX (CONT)
Fault Isolation Procedure or
Maintenance Procedure(s)
Symptom
15. Infrared body assembly does not
operate on batter power
Purge and charge infrared body assembly ( Vol II,
16. Pressure cannot be held in infrared
body assembly
17. Reticle not sharply focused
Replace eyepiece assembly ( Vol II, para 6-10 and
6-13)
18. Infrared body assembly does not
Replace latch ( Vol II, para 6-27)
hold tightly to body assembly
19. Loose boresight knobs
Replace knob spring ( Vol II, para 6-36)
20. Binding or rough turning of
Replace knob assembly (Vol II, para 6-36)
boresight knobs
ELBOW ASSEMBLY (M36E1)
21. Image is bright when shutter
.
assembly switch is off
22. Image flickers or cannot be seen, or
brightness cannot be controlled
23. Reticle cannot be seen or brightness
cannot be controlled
24. Reticle does not move when
Replace knob assembly ( Vol II, para 7-26)
boresight knob is turned
25. Parallax error in eyepiece
Send elbow assembly to depot for repair
26. Reticle cannot be sharply focused
Replace eyepiece assembly ( Vol II, para 7-6)
27. No image or reticle when using
M30 instrument light electrical
connector
28. Pressure cannot be held in elbow
Purge and charge elbow assembly ( Vol II, para 8-5)
assembly
Vol I
