Night Optics Argus 740 4x Gen 3 Gated Night Vision Scope - Manual (Page 12)

11 NIGHT OPTICS USA WEAPON SIGHTS
TROUBLESHOOTING
MAINTENANCE
!WARNING!
Improper care or unauthorized maintenance can damage device and may result
in warranty nullification.
Image dimmer than usual.
SYMPTOMS PROBABLE CAUSE CORRECTIVE ACTION
No visible Image a. Objective lens cap not
been removed.
b. Battery cover is loose.
c. Incorrect battery polarity
d. Weak battery
a. Remove cap
b. Tighten cover
c. Reinsert battery
d. Replace battery
Image flickers, flashes, or
clicking is heard
a. Normal for new battery to
cause this for first five
minutes.
a. If condition continues
contact manufacturer for
service instructions
Dark spots on screen a. Cosmetic blemishes.
Normal for this technology.
a. Acceptable as long as it
does not interfere with
operation of the device
Image not clear a. Focus is not adjusted.
b. Too close to object
a. Adjust focus
b. Increase viewing distance.
Fixed pattern noise.
(honeycomb)
a. Cosmetic blemishes
caused by too much
illumination.
a. Acceptable as long as
target resolution can be
resolved.
Pattern of dark thin lines
(chicken wire)
a. Normal under worst
conditions. These lines will
form hexagonal or square
wave-shaved lines.
a. Weak batteries
b. Low natural illumination
level.
a. Acceptable as long as it
does not interfere with
operation of the device
a. Replace the batteries.
b. Turn on IR illuminator.