TM 9-1240-216-34
CHAPTER 3
FAULT SYMPTOM INDEX
Fault Isolation Procedure or
Symptom
Maintenance Procedure
1.
Headrest does not move
Disassemble headrest assembly. Repair as required (Vol
smoothly
2.
Elevation lock does not move
Disassemble lock assembly, lubricate, repair or replace, as
smoothly
required (Vol II, para 4-8 and JPG)
3.
Elevation lock does not lock
Disassemble lock assembly, lubricate and repair, as
tight
required (Vol II, para 4-8 and JPG)
No image (in one or both
4.
eyepieces) when power supply
configurations)
is on
5.
Poor focus (one one or both
eyepieces)
configurations)
6.
Image dim (not bright) or
flickering (not stable)
configurations)
3-1/(3-2 blank)
Vol I
