ATN 3 Operator Troubleshooting for ATN NVM-14, Malfunction Test or inspection Corrective Action

Table 6.2 Operator Troubleshooting for ATN NVM-14

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