Armasight NSGN150001F6DA1 N-15 FLAG Night Vision Goggles - Manual (Page 29)

29
4.4 MAINTENANCE
4.4.1 GENERAL
The section regarding N-15 operator maintenance consists of operational tests, inspections for the unit
serviceability, cleaning and mounting procedures, troubleshooting, and replacement instructions for
a limited number of parts. Maintenance instructions covered elsewhere in this manual (PMCS, trouble-
shooting, etc.) are not repeated in this section.
CAUTION:
The N-15 is a precision electron-optical instrument, and must be handled carefully at all times
to prevent damage to the device’s body or mechanisms.
4.4.2 CLEANING PROCEDURES
CAUTION:
The coating on the demist shield can be damaged if the shield is cleaned while wet, or if it is
cleaned with wet lens paper. Clean the shield only when it is dry, and only use dry lens paper.
CAUTION:
Thoroughly dry each item before placing them into the storage case.
Clean the N-15 as follows:
1. Gently brush off any dirt from the unit’s body using a clean, soft cloth.
2. Moisten the cloth with fresh water and gently wipe external surfaces (except for glass surfaces).
3. Dry any wet surfaces (except for glass surfaces) with another clean, soft, dry cloth.
4. Using a lens brush, carefully remove all loose dirt from the glass surfaces.
5. Slightly dampen a cotton swab with ethanol. Gently and slowly wipe the lenses (including the pho-
toreceiver and the pivotal focusing lens). Without touching the lens holders, clean the glass surfaces
in circular movements, beginning in the center and moving out towards the edge. Change the cotton
swab after each circular stroke. Repeat until the glass surfaces are clean.
6. Clean the battery contact surfaces and contact springs with a pencil eraser and/ or alcohol-damp-
ened cotton swabs.
Clean optional mounting devices with a soft brush (cloth), soap, and water as required.
Clean optional lenses as detailed in items 4 and 5 above (except for the demist shield).
4.4.3 BATTERY REMOVAL AND REPLACEMENT
Refer to Part 3.1.1 for battery installation procedures. No special tools are required to replace the bat-
tery.
4.4.4 GOGGLE KIT MAINTENANCE
A. Browpad Replacement
Replace the browpad when cracked, torn, or contaminated. Perform the following to remove and re-
place the browpads:
1. Firmly grasp the goggle kit and remove the old browpad.
2. Gently press on the new browpad. Gently smooth out any wrinkles in the new browpad.