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TABLE 6.2 OPERATOR TROUBLESHOOTING FOR ATN NVM-14 (CONT.)
Malfunction Test or inspection Corrective Action
6. Diopter adjust-
ment cannot be
made
Check to see if the diopter adjustment ring
is bent or broken
If damaged, refer to higher level of
maintenance.
7. Battery adapter
difficult to remove.
• Visually inspect for the presence of an
o-ring
• Check for damaged battery adapter.
• If o-ring is missing, replace.
• If damaged, refer to higher level of
maintenance.
8. Head straps
cannot be tightened
Check for defective buckles, fasteners or
straps.
If damaged, refer to higher level of
maintenance.
9. Headmount
or helmet mount
socket and
head/helmet mount
adapter latch does
not catch.
• Check socket or latch for dirt.
• Check socket or latch for damage.
• Clean socket and latch.
• If damaged, return both headmount or
head/helmet mount adapter to higher
level of maintenance.
10. Helmet mount
will not tighten to
helmet.
Inspect mounting hardware for damage. If damaged, refer to higher level of
maintenance.