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TABLE 6.2 OPERATOR TROUBLESHOOTING FOR ATN NVM-14
Malfunction Test or inspection Corrective Action
1. Monocular fails to
activate.
Visual.
Check for defective, missing or improp-
erly installed batteries.
Turn switch to OFF position and then
ON.
Replace batteries or install correctly.
2. IR illuminator fails
to activate.
In a dark location with system turned on,
activate IR. Visually check IR illuminator
operation; scene should brighten.
If IR illuminator fails to activate, refer to
higher level of maintenance.
3. IR indicator fails
to activate.
Visual. Refer to higher level of maintenance.
4. Poor image
quality
• Check objective lens or ey piece focus.
• Check for fogging or dirt on lens.
•Refocus.
•Clean lens surface.
• If image quality is still poor, refer to
higher level of maintenance.
5. Light visible
around eyecup
• Check eye-relief distance.
• Check eyecup for resiliency.
• Readjust for proper eye-relief distance.
• If eyecup is defective, refer to higher
level of maintenance.