Operation Manual

2-6
TABLE 2.2. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE MUNVM.
ITEM
NO.
INTER-
VAL
LOCATION
PROCEDURE
NOT FULLY
MISSION
CAPABLE IF:
CHECK/
SERVICE
1 Before Open carrying case and check the inven-
tory items
2 Before/
After
MONOCULAR Optical Surfaces
Inspect all lenses (objective, eyepiece, IR lens and high light cut-off window) for dirt, fingerprint residue, chips, or cracks. If nec- essary, clean and dry lenses with water and lens tissue.
Scratches or heavy scratches that hinder vision with monocu- lar turned ON, or if cracks are present.
3 Before/
After
Battery Cap Housing
Inspect external surfaces for cracks or damage. Scratches, cracks, and gouges are OK if operation is not affected. Inspect battery compartment. Check to make sure battery cap is present. Re- move battery cap and inspect for moisture, cracks, corroded or defective spring con- tacts, and o-ring present in cap.
Cracks or damage in the battery housing. Cap is missing, con- tacts damaged, or corroded, o-ring is missing.