Night Optics D-930 Gen 3 Gated Clip-on Night Vision Scope - Manual (Page 9)

Refer to Image Intensifier Inspection to
inspect for operational defects.
Flickering, Flashing,
edge glow, or
shading is observed.
4.
5.
6.
Before/After
Before/After
Before/After
Power ON/OFF
Switch
Turn the switch from OFF to ON. Each
position should have a definite
stopping point. Inspect for broken or
missing knob.
Switch has no
definite stopping
points or knob is
broken or missing.
Check for free movement and
operation per Instruction
Variable Gain Cracked or damaged.
Viewed Image
Item
#
Interval Procedure
Not Fully Mission
Capable if:
Location
(Item to
Check/Service)
PREVENTIVE MAINTENANCE CHECKS
continued...
IMAGE INTENSIFIER INSPECTION
As directed in the Preventative Maintenance Table, image intensifier assembly operation must
be checked before each use. This section provides information for the operator concerning
what to look for, how to look for it, and how to determine if the NO/D-930 should be returned
to the manufacturer.
There are two groups of “defects” that you may encounter - operational defects and cosmetic
blemishes. Operational defects are an immediate cause to reject the NO/D-930. Cosmetic
blemishes are not a cause for rejection unless they become severe enough to interfere with
the ability to perform the operation. The rejection of any NO/D-930 for cosmetic defects must
be based on an outdoor evaluation.
OPERATIONAL DEFECTS
These defects relate to the reliability of the image intensifier and are an indication of
instability. If identified, they are an immediate cause for rejecting the NO/D-930. They include
shading, edge glow, flashing, flickering, and intermittent operation.
1) Shading - If shading is present, you will not see a fully circular image. Shading is very dark
and you will not see an image through it. Shading always begins on the edge and migrates
inward eventually across the entire image area. Shading is a high contrast area with a distinct
line of demarcation. Return the NO/D-930 to the manufacturer.
NOTE - Make sure the shading is not the result of improper eye-relief adjustment.
WARNING - Perform the following inspection in the dark!
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