The document provides operating instructions for a monocular night vision device (MNVD). It contains safety warnings and precautions, descriptions of components and controls, and procedures for operation and maintenance. Key steps include inspecting equipment and batteries for damage before use, installing batteries, assembling the headmount, mounting the device to a weapon, and operating controls like focus and gain. Maintenance involves troubleshooting, cleaning, and replacing parts as needed.

1. MNVD-TM-ITI
OPERATOR MANUAL
FOR THE
Monocular Night Vision Device (MNVD)
Rev. 1 11 October 2011

3. i
SAFETY SUMMARY
GENERAL
This manual contains operating instructions and
maintenance procedures which may cause injury or death to
personnel, or damage to equipment if not properly followed.
Prior to performing any task, the WARNINGs, CAUTIONs
and NOTEs included in that task shall be reviewed and
understood.
DEFINITIONS
WARNING
Highlights an essential operating or maintenance
procedure, practice, condition or statement, which,
if not strictly observed, could result in injury to, or
death of, personnel or long term health hazards.
CAUTION
Highlights an essential operating or maintenance
procedure, practice, condition or statement, which,
if not strictly observed, could result in damage to,
or destruction of, equipment or loss of mission
effectiveness.
NOTE
Highlights an essential operating or maintenance
procedure, condition or statement.

4. ii
SAFETY PRECAUTIONS
The following general safety precautions supplement the
specific WARNINGs, CAUTIONs and NOTEs that appear
elsewhere in this manual.
WARNING
The Infrared (IR) LED Illuminator is detectable by
an enemy using night vision devices. Detection is
easier in smoky, foggy, or rainy conditions. To
reduce the risk of detection by an enemy using
night vision devices, avoid prolonged activation of
the IR LED Illuminator.
WARNING
Emission of stray light from the eyepiece (even
with eyecup installed) may be detectable by the
enemy.
WARNING
Do not touch, ingest, or inhale particles or
fragments of a broken objective lens. Lens
contains material that may cause irritation to eyes,
skin, upper and lower respiratory tracts, or
gastrointestinal tract. If contacted, flush eyes or
skin with large amounts of water. If ingested, DO
NOT induce vomiting. Rinse mouth with water
and give victim 2-4 cupfuls of milk or water.
Fragments of lens may be sharp enough to cut
personnel if touched.

5. iii
WARNING
Remove the MNVD from the weapon before
inspecting, cleaning, or performing other
maintenance functions.
WARNING
• Do not short circuit, puncture, incinerate, or
disassemble battery.
• Do not attempt to recharge battery.
• Prior to use, inspect battery for cracks, dents,
leakage, or bulging. Never install a defective
battery in the MNVD.
WARNING
Lithium batteries can explode or cause burns if
disassembled, shorted, recharged, exposed to
water, fire, or high temperatures (above 100°C or
212°F). Do not place loose batteries in a pocket
or other container containing metal objects. Do
not store batteries with hazardous or combustible
materials. Store in a cool, dry, ventilated area.
WARNING
Use of off-brand batteries poses a risk of fire or
explosion. Ensure that only a 1.5V AA battery
produced by a well-known battery manufacturer is
installed in the MNVD. These batteries are
specifically designed for use in high performance,
high-drain devices, and contain built-in fault and
heat protection features.

6. iv
CAUTION
Do not ship or store the MNVD with the battery
installed.
CAUTION
Pointing the MNVD at the sun without the lens
cover installed may damage internal imaging
components.
CAUTION
The coating on the demist shield may be damaged
if cleaned while wet. Clean the demist shield only
when dry and using dry lens tissue.
CAUTION
Use of acetone or gun cleaning agents containing
perchloroethylene or methylene chloride may
permanently damage the MNVD.

7. v
TABLE OF CONTENTS
SAFETY SUMMARY.......................................................................i
TABLE OF CONTENTS.................................................................v
LIST OF FIGURES .......................................................................vii
LIST OF TABLES.........................................................................vii
CHAPTER 1......................................................................................1-1
INTRODUCTION .........................................................................1-1
SECTION I..............................................................................1-1
GENERAL INFORMATION...............................................1-1
1.1 SCOPE..................................................................1-1
1.2 MODEL NUMBER AND EQUIPMENT NAME......1-2
1.3 MANUFACTURER................................................1-2
1.4 PURPOSE OF EQUIPMENT................................1-2
1.5 ABBREVIATIONS AND ACRONYMS ..................1-2
SECTION II.............................................................................1-3
EQUIPMENT DESCRIPTION ...........................................1-3
1.6 SYSTEM DESCRIPTION......................................1-3
1.7 TECHNICAL SPECIFICATIONS ..........................1-4
1.8 MAJOR COMPONENTS.......................................1-5
1.9 FEATURES AND CONTROLS .............................1-8
CHAPTER 2......................................................................................2-1
OPERATING INSTRUCTIONS ...................................................2-1
SECTION I..............................................................................2-1
PREPARATION FOR USE ...............................................2-1
2.1 PREPARATION FOR USE ...................................2-1
2.2 BATTERY HANDLING..........................................2-2
2.3 HEADMOUNT ASSEMBLY ..................................2-3
2.4 WEAPON MOUNTING INSTRUCTIONS ...........2-11
2.5 LENS ACCESSORIES........................................2-14
SECTION II...........................................................................2-16
OPERATING INSTRUCTIONS.......................................2-16
2.6 MODES OF OPERATION...................................2-16
2.7 IR LED ILLUMINATOR .......................................2-17
2.8 GAIN (CONTRAST) ............................................2-18
2.9 FOCUS................................................................2-18
2.10 DIOPTER ADJUSTMENT.................................2-19
2.11 STARTUP PROCEDURES...............................2-19

8. vi
TABLE OF CONTENTS – Continued
CHAPTER 3......................................................................................3-1
MAINTENANCE ..........................................................................3-1
SECTION I..............................................................................3-1
OPERATOR MAINTENANCE...........................................3-1
3.1 TROUBLESHOOTING PROCEDURES ...............3-1
3.2 INSPECTION / CLEANING...................................3-3
3.3 CORRECTIVE MAINTENANCE PROCEDURES 3-5
SECTION II.............................................................................3-7
SERVICE / PACKING AND UNPACKING........................3-7
3.4 SERVICE / REPAIR..............................................3-7
3.5 WARRANTY INFORMATION ...............................3-8
3.6 NON-WARRANTY INFORMATION......................3-8
APPENDIX A ...................................................................................A-1
REPAIR PARTS LIST ................................................................A-1
APPENDIX B ...................................................................................B-1
ACCESSORIES..........................................................................B-1

9. vii
LIST OF FIGURES
Figure 1-1 Headmounted MNVD .....................................................1-1
Figure 1-2 Major Components.........................................................1-5
Figure 1-3 Features and Controls....................................................1-8
Figure 2-1 Battery Installation..........................................................2-2
Figure 2-2 Low Battery Indicator......................................................2-3
Figure 2-3 Headmount Assembly ....................................................2-4
Figure 2-4 Headmount Adapter Installation.....................................2-6
Figure 2-5 Mounting to Headmount Assembly................................2-7
Figure 2-6 Fore / Aft Release Button...............................................2-8
Figure 2-7 Adjustment Knob............................................................2-9
Figure 2-8 Weapon Mount Assembly ............................................2-11
Figure 2-9 Weapon Mount Assembly Installation..........................2-12
Figure 2-10 Mounting the MNVD...................................................2-13
Figure 2-11 MNVD Eyecups ..........................................................2-15
Figure 2-12 IR LED Illuminator Indicator .......................................2-18
Figure 3-1 Neck Cord Replacement ................................................3-6
Figure A-1 End Item Components .................................................. A-1
Figure A-2 MNVD Assembly........................................................... A-3
LIST OF TABLES
Table 1-1 Technical Specifications..................................................1-4
Table 1-2 List of Major Components ...............................................1-6
Table 1-3 List of Features and Controls ..........................................1-9
Table 2-1 Field of View and Positioning Adjustments ...................2-10
Table 2-2 Mode Switch Operation .................................................2-17
Table 3-1 Troubleshooting Procedures ...........................................3-1
Table A-1 List of End Item Components......................................... A-2
Table A-2 List of Repair Parts......................................................... A-3
Table B-1 List of Accessories ......................................................... B-1

11. 1-1
CHAPTER 1
INTRODUCTION
SECTION I
GENERAL INFORMATION
Figure 1-1 Headmounted MNVD
1.1 SCOPE
This manual is intended for use by operators of the
Monocular Night Vision Device (MNVD). It provides a
system description, operational procedures, and
maintenance responsibilities. Complete familiarization with
this manual prior to using the equipment will ensure safe
operation and maximum effectiveness of the MNVD.

12. 1-2
1.2 MODEL NUMBER AND EQUIPMENT NAME
245620, Monocular Night Vision Device (MNVD)
1.3 MANUFACTURER
L-3 Communications Corporation
Warrior Systems Division
Insight Operations
9 Akira Way
Londonderry, NH 03053 USA
1.4 PURPOSE OF EQUIPMENT
The MNVD allows for observation under adverse conditions
including light rain, smoke, light snow, and low light to total
darkness.
1.5 ABBREVIATIONS AND ACRONYMS
Abbreviations and acronyms used in this manual are listed
as follows:
cm Centimeter
g Gram
I2
Image Intensifier
IR Infrared
ITAR International Traffic in Arms Regulations
LED Light Emitting Diode
mm Millimeter
MNVD Monocular Night Vision Device
NSN National Stock Number
RMA Return Material Authorization
TBD To Be Determined
V Volt

13. 1-3
SECTION II
EQUIPMENT DESCRIPTION
1.6 SYSTEM DESCRIPTION
The MNVD is a portable, battery operated night vision device
with an integrated IR light source. It can be used as a
handheld device or may be mounted to a weapon, helmet, or
headmount assembly.
When used in the normal operating mode (ON), the MNVD
amplifies available ambient light to allow for observation
under adverse conditions including light rain, smoke, light
snow, and low light conditions. When used in the IR mode,
the MNVD generates its own light with an integrated IR LED
Illuminator to allow for observation, map reading, etc. even in
complete darkness.
The MNVD is a ruggedized system designed for operation in
battlefield environments.

14. 1-4
1.7 TECHNICAL SPECIFICATIONS
Table 1-1 provides technical specifications for the MNVD.
Table 1-1 Technical Specifications
WEIGHT AND DIMENSIONS
Weight < 14.1 ounces (400 g)
Length
(with standard eyecup)
6.5 inches (16.5 cm)
Width 2.8 inches (7.1 cm)
Height 2.4 inches (6.1 cm)
POWER AND PERFORMANCE
Battery One 1.5V AA lithium battery
Battery Life
1
> 15 hours
Magnification 1x
Field of View 40° (± 2°)
Objective Focus 9.8 inches (25cm) to infinity
Diopter Adjustment +2 to -6
Immersion 1 meter for 30 minutes
Operating Temperature -60°F (-51°C) to 120°F (49°C)
Storage Temperature -60°F (-51°C) to 185°F (85°C)
1
Performance will vary depending on actual environmental and
atmospheric conditions.

15. 1-5
1.8 MAJOR COMPONENTS
The MNVD system includes the components shown in Figure
1-2. Table 1-2 provides a brief functional description of each
item. The “Key” column in Table 1-2 corresponds to the
label numbers in Figure 1-2.
Figure 1-2 Major Components
1
2 3
4
5
67
8
9
10
11
12
13
15
14

16. 1-6
1.8 MAJOR COMPONENTS – Continued
Table 1-2 List of Major Components
Key
Major
Component
Function
1 Brow Pads Used on the headmount assembly to
provide maximum comfort and best fit.
2 Headmount
Assembly
Worn on the head to permit hands-free
operation of the MNVD.
3 Soft Carrying
Case
Protects the MNVD and accessories
while in a field environment.
4 Operator Manual Provides detailed operating and
maintenance procedures specific to the
MNVD.
5 Quick Reference
Guide
Provides at-a-glance operating
instructions for the MNVD.
6 Lens Tissue Used to clean the optical surfaces of the
MNVD.
7 Retainer Cord May be tied to the MNVD and clipped to
the operator to secure the MNVD when
not in use.
8 Sacrificial
Window
Protects the objective lens from
becoming scratched or otherwise
damaged.
9 Demist Shield Protects the eyepiece from becoming
scratched or otherwise damaged and
prevents fogging of the eyepiece.

17. 1-7
1.8 MAJOR COMPONENTS – Continued
Table 1-2 List of Major Components – Continued
Key
Major
Component
Function
10 Headmount
Adapter
Allows the MNVD to be installed on the
headmount assembly or a suitably
configured helmet.
11 Weapon Mount
Assembly
Allows the MNVD to be mounted to
weapons equipped with a MIL-STD-
1913 rail.
12 Eyecup,
Shuttered
Reduces emission of stray light from the
eyepiece when the MNVD is used in a
weapon-mounted configuration.
13 MNVD Assembly A portable, battery operated night vision
device with integrated IR light source.
14 AA Lithium
Battery (2)
Provides power to the MNVD.
15 Shoulder Strap Allows the soft carrying case to be slung
across the shoulder for ease of carrying.

18. 1-8
1.9 FEATURES AND CONTROLS
Figure 1-3 shows features and controls for the MNVD. Table
1-3 provides a brief functional description of each item. The
“Key” column in Table 1-3 corresponds to the label numbers
in Figure 1-3.
Figure 1-3 Features and Controls
1
2
5 6
7
8
1112
3
10 9
4

19. 1-9
1.9 FEATURES AND CONTROLS – Continued
Table 1-3 List of Features and Controls
Key
Major
Component
Function
1 Objective Lens Collects available light within the viewed
scene and focuses it onto the input
surface of an image intensifier (I2
) tube.
2 Focus Ring Used to focus the MNVD from 9.8
inches (25cm) to infinity.
3 High Light Sensor Detects ambient light conditions so that
the I
2
tube will be automatically shut off
if conditions are so bright as to risk
damaging internal components.
4 Mounting
Interface
Provides female threading to accept the
headmount adapter and weapon mount
assembly.
5 Diopter Adjuster Used to focus the eyepiece lens to
compensate for the visual acuity of the
operator.
6 Eyecup Assists in positioning the MNVD relative
to the operator’s eye in handheld and
headmounted configurations. Reduces
emission of stray light from the
eyepiece.
7 Mode Switch A 3-position switch used to turn the
MNVD on in a selected operating mode.
8 Lens Cover Protects the objective lens and internal
imaging components and prevents glare
or reflection off the objective lens when
the MNVD is not in use.

20. 1-10
1.9 FEATURES AND CONTROLS – Continued
Table 1-3 List of Features and Controls – Continued
Key
Major
Component
Function
9 Neck Cord Holds the objective lens cover captive to
the MNVD. Allows for the MNVD to be
worn around the neck during periods of
nonuse.
10 IR LED
Illuminator
Used to provide a supplementary light
source in conditions of extreme
darkness.
11 Gain Control
Knob
Used to adjust the gain (contrast) of the
viewed image.
12 Battery Cap /
Compartment
Provides secure housing for the single
AA battery that powers the MNVD.

21. 2-1
CHAPTER 2
OPERATING INSTRUCTIONS
SECTION I
PREPARATION FOR USE
2.1 PREPARATION FOR USE
Unpacking the Equipment
Open the soft carrying case and verify that all major
components listed in Table 1-2 are present. Check the
MNVD to ensure the following additional items are included:
a. Eyecup
b. Lens Cover
c. Battery Cap
d. Neck Cord
If any of the major components or items listed above are
missing, seek guidance from the equipment issuing
authority.
Inspection of the Equipment
Before use, inspect all pieces of equipment for any damage
such as cracks, loose parts, faulty cables, or other visible
defects. If any damage or defects are noted, seek guidance
from the equipment issuing authority.

22. 2-2
2.2 BATTERY HANDLING
Battery Inspection
Before installation, inspect the battery for any cracks, dents,
leakage, or bulging. Never install a defective battery in the
MNVD.
Battery Installation
Access the battery compartment by turning the battery cap
counterclockwise. Install one AA lithium battery with the
positive terminal facing in as shown in Figure 2-1. Proper
battery orientation is clearly marked on the MNVD housing.
Replace the battery cap and turn clockwise to tighten.
Figure 2-1 Battery Installation

23. 2-3
2.2 BATTERY HANDLING – Continued
CAUTION
Do not ship or store the MNVD with battery
installed.
Low Battery Indicator
A red light visible through the eyepiece, just outside the
intensified field of view, indicates a low battery condition. It
will illuminate when approximately 30 minutes of operation
remain.
Figure 2-2 Low Battery Indicator
2.3 HEADMOUNT ASSEMBLY
The MNVD system comes with a headmount assembly that
may be worn on the head to permit hands-free operation of
the MNVD.
FIELD OF VIEW
LOW BATTERY
INDICATOR

24. 2-4
2.3 HEADMOUNT ASSEMBLY – Continued
Donning the Headmount Assembly
The following procedures for donning the headmount
assembly should be performed before attaching the
headmount adapter and MNVD.
1. Review Figure 2–3 to gain familiarity with the labeled
items that will be referred to in this section.
Figure 2-3 Headmount Assembly
FRONT CHIN
STRAP (2)
REAR CHIN
STRAP (2)
VERTICAL
ADJUSTMENT
STRAP
NECK PAD
SNAPS (4)

25. 2-5
2.3 HEADMOUNT ASSEMBLY – Continued
2. Loosen the four chin straps until the ends of each strap
are approximately two inches from the sliding bar
buckles.
3. Ensure the front and rear snaps are engaged.
4. Position the neck pad on the back of the neck and pull the
headmount assembly over the head.
5. Remove slack from the two rear chin straps but do not
tighten.
6. Adjust front and rear chin straps and vertical adjustment
strap until the headmount assembly is in a comfortable
but firm position.
NOTE
Minor strap adjustments may be necessary after
installing the headmount adapter and MNVD.
Headmount Adapter
The headmount adapter allows the MNVD to be installed on
the headmount assembly or a suitably configured helmet.
1. With the MNVD in one hand, use the free hand to orient
the headmount adapter above the mounting interface as
shown in Figure 2-4. Keying features in the headmount
adapter and mounting interface allow only one
orientation.
2. Rotate the thumbscrew clockwise to secure the
headmount adapter to the MNVD, taking care not the
cross threads.

26. 2-6
2.3 HEADMOUNT ASSEMBLY – Continued
Figure 2-4 Headmount Adapter Installation
3. The headmount adapter is now installed on the MNVD.
Mounting
Align the headmount adapter with the receptacle on the
headmount assembly as shown in Figure 2-5 and push the
parts together until the mating features engage. To
disengage, press the release lever shown below.
THUMBSCREW
MOUNTING
INTERFACE

27. 2-7
2.3 HEADMOUNT ASSEMBLY – Continued
Figure 2-5 Mounting to Headmount Assembly
Positioning Adjustments
With the MNVD system installed, positioning adjustments
must be made for maximum performance and comfort.
Figures 2-6 and 2-7 show controls used for positioning
adjustments.
NOTE
Positioning adjustments are made with the MNVD
attached to the headmount, the eyecup installed,
and the headmount properly donned. The MNVD
cannot be properly adjusted until the headmount
itself is correctly fitted.
RELEASE
LEVER

28. 2-8
2.3 HEADMOUNT ASSEMBLY – Continued
NOTE
Optimal system performance and comfort of the
operator rely on carefully following the procedures
below. The best visual performance is possible
only when the optical axis of the device is aligned
with the visual axis of the eye.
• Fore / Aft Adjustment. The MNVD can be moved
forward or backward relative to the head. Press the
fore / aft release button and slide the MNVD forward
or backward to achieve optimal eye relief.
Figure 2-6 Fore / Aft Release Button

29. 2-9
2.3 HEADMOUNT ASSEMBLY – Continued
• Height Adjustment. The headmount’s vertical
adjustment strap (see Figure 2-3) provides for height
adjustment of the MNVD. Tighten or loosen the
vertical adjustment strap until the MNVD is level with
the operator’s eyes.
• Pupillary Adjustment. The MNVD can be moved in
an arc to provide best alignment with the operator’s
eye. Unscrew the adjustment knob to its full and
open position (see Figure 2-7). Gently push the
MNVD away from the operator’s head and rotate
clockwise or counterclockwise until proper
positioning is achieved. Screw in the adjustment
knob to lock the MNVD in place.
Figure 2-7 Adjustment Knob

30. 2-10
2.3 HEADMOUNT ASSEMBLY – Continued
The first row in Table 2-1 shows the optimal field of view for
the MNVD when positioning adjustments are correctly
performed. The remaining rows show unsatisfactory fields of
view when positioning adjustments are performed
incorrectly, along with corrective action that can be taken to
resolve the problem.
Table 2-1 Field of View and Positioning Adjustments
Field of View Remarks / Corrective Action
Optimal alignment.
Eye relief too long. Correct fore and aft
adjustment.
Eye relief too short. Correct fore and aft
adjustment.
Eyepiece set too left. Correct pupillary
adjustment.
Eyepiece set too right. Correct pupillary
adjustment.

31. 2-11
2.3 HEADMOUNT ASSEMBLY – Continued
Table 2-1 Field of View and Positioning Adjustments –
Continued
Field of View Remarks / Corrective Action
Positioned too high. Correct height
adjustment.
Positioned too low. Correct height
adjustment.
MNVD field of view
Eyepiece field of view
Obstructed MNVD field of view
2.4 WEAPON MOUNTING INSTRUCTIONS
The weapon mount assembly allows the MNVD to be
mounted to weapons equipped with a MIL-STD-1913 rail.
Figure 2-8 Weapon Mount Assembly
THUMBSCREW
MOUNTING SCREW
JAWS

32. 2-12
2.4 WEAPON MOUNTING INSTRUCTIONS – Continued
Installing the Weapon Mount Assembly
1. With the MNVD in one hand, use the free hand to orient
the weapon mount assembly above the mounting
interface as shown in Figure 2-9. Keying features in the
weapon mount assembly and mounting interface allow
only one orientation.
2. Rotate the thumbscrew clockwise to secure the weapon
mount assembly to the MNVD, taking care not the cross
threads.
Figure 2-9 Weapon Mount Assembly Installation
3. The weapon mount assembly is now installed on the
MNVD.
MOUNTING
INTERFACE
THUMBSCREW

33. 2-13
2.4 WEAPON MOUNTING INSTRUCTIONS – Continued
Mounting the MNVD
WARNING
Be sure the weapon is CLEAR and SAFE before
proceeding.
1. Loosen the mounting screw on the weapon mount
assembly until the jaws have sufficient space to fit over
the weapon rail.
2. Position the MNVD facing forward, ensuring the recoil lug
is seated in the desired recoil groove of the rail. While
pushing down and forward on the MNVD, turn the
mounting screw clockwise until snug.
Figure 2-10 Mounting the MNVD

34. 2-14
2.5 LENS ACCESSORIES
Objective Lens Cover
The objective lens cover affords additional protection to the
objective lens and protects the MNVD’s internal imaging
components. It should be pressed into place (installed) over
the objective lens whenever the MNVD is not being used. It
should also be installed when the MNVD is being used in
brightly lit environments. A small hole in the center of the
lens cover allows enough light to enter the MNVD when
operating in these conditions. In darker environments, better
performance will be observed with the lens cover uninstalled.
The objective lens cover is held captive to the MNVD by the
neck cord.
Sacrificial Window
A sacrificial window is provided to protect the objective lens
from becoming scratched or otherwise damaged. The
sacrificial window should be pressed into place (installed)
over the objective lens whenever the lens cover is not
installed.
Demist Shield
CAUTION
The coating on the demist shield may be damaged
if cleaned while wet. Clean the demist shield only
when dry and using dry lens tissue.

35. 2-15
2.4 LENS ACCESSORIES – Continued
The demist shield is provided to protect the eyepiece from
becoming scratched or otherwise damaged, and to prevent
fogging of the eyepiece. It should be installed whenever the
MNVD is in use. With the eyecup removed, place the demist
shield over the eyepiece with the narrow side in. Taking
care not to smudge the eyepiece or demist shield, press the
demist shield into place.
Eyecups
The MNVD is equipped with both a standard and shuttered
eyecup to accommodate a variety of tactical situations and
mounting configurations.
Figure 2-11 MNVD Eyecups
To install, press the desired eyecup over the end of the
eyepiece. If installing the standard eyecup, rotate to obtain
proper eye / cheek weld.
STANDARD EYECUP SHUTTERED EYECUP

36. 2-16
SECTION II
OPERATING INSTRUCTIONS
2.6 MODES OF OPERATION
The MNVD is powered on by turning the Mode Switch to the
desired position.
CAUTION
Pointing the MNVD at the sun without the lens
cover installed may damage internal imaging
components.
NOTE
The MNVD is equipped with a high light sensor
(see Figure 1-3) that detects ambient light
conditions and automatically shuts down the I2
tube if conditions are so bright as to risk damaging
internal components. To reset (power on) the
MNVD after a high light shutdown, turn the Mode
Switch to the RESET / OFF position and then back
to the desired setting.

37. 2-17
2.6 MODES OF OPERATION – Continued
Table 2-2 Mode Switch Operation
Mode Switch
Position
Effect
RESET
OFF
Turns MNVD off. Resets the MNVD after a high
light shutdown.
ON
Activates the MNVD using (and amplifying)
available, ambient light.
IR
PULL
Activates the MNVD using the IR LED Illuminator
to provide an integrated light source in conditions
of extreme darkness.
2.7 IR LED ILLUMINATOR
WARNING
The IR LED Illuminator is detectable by an enemy
using night vision devices. Detection is easier in
smoky, foggy, or rainy conditions. To reduce the
risk of detection by an enemy using night vision
devices, avoid prolonged activation of the IR LED
Illuminator.
The IR LED Illuminator is used to provide a supplementary
light source in conditions of extreme darkness. In addition to
the IR mode described in Table 2-2, the IR LED Illuminator
may also be activated in a momentary setting. To
momentarily activate the IR LED Illuminator, turn the Mode
Switch to the ON position. Continue turning past the ON
position and hold. The IR LED Illuminator will remain
activated until the Mode Switch is released.
A red light in the eyepiece, just outside the intensified field of
view, indicates that the IR LED Illuminator is activated.

38. 2-18
2.7 IR LED ILLUMINATOR – Continued
Figure 2-12 IR LED Illuminator Indicator
2.8 GAIN (CONTRAST)
The MNVD is equipped with a gain control knob used to
adjust the gain (contrast) of the viewed image. When
looking through the eyepiece, turning the gain control knob
clockwise will provide more contrast. Turning the gain
control knob counterclockwise will provide less contrast.
2.9 FOCUS
The objective lens must be focused for the viewing distance
being observed. While looking at an object at least 9.8
inches (25cm) from the MNVD, rotate the objective focus
ring for best image clarity. A change in viewing distance
requires that the objective lens be refocused. If already
focused for a distance of at least 250 feet (76m), no change
in focus is required between this distance and infinity.
FIELD OF VIEW
IR LED ILLUMINATOR
INDICATOR

39. 2-19
2.10 DIOPTER ADJUSTMENT
The eyepiece may be focused to accommodate differences
in the visual acuity of individual operators, from +2 to -6
diopters. While looking at an object at least 9.8 inches
(25cm) from the MNVD, rotate the diopter adjuster to
achieve the sharpest possible image.
2.11 STARTUP PROCEDURES
To achieve optimal performance and image clarity, the
following procedures should be accomplished in the order
presented, each time the MNVD is placed into use.
1. Perform mounting procedures and positioning
adjustments as applicable:
a. For head or helmet-mounted configurations, don the
headmount and MNVD and make all positioning
adjustments per section 2.3.
b. For weapon-mounted configurations, install the
weapon mount assembly and mount to the host
weapon per section 2.4.
2. Turn the Mode Switch to the desired position per section
2.6.
3. Adjust the gain (contrast) to a comfortable viewing level
per section 2.8.
4. Rotate the objective focus ring for best image clarity.
5. Make diopter adjustments per section 2.10.

41. 3-1
CHAPTER 3
MAINTENANCE
SECTION I
OPERATOR MAINTENANCE
3.1 TROUBLESHOOTING PROCEDURES
The procedures below will help correct some of the basic
problems that may arise with the MNVD. If the equipment
malfunction is not listed, or the actions listed do not correct
the fault, refer to section 3.4 for additional guidance.
Table 3-1 Troubleshooting Procedures
Malfunction Probable Cause Corrective Action
1. No image is
present when
turning on the
MNVD.
a. Batteries are improperly
installed.
a. Verify batteries are properly
installed per section 2.2, Battery
Installation.
b. Battery power is low. b. Replace batteries per section
2.2, Battery Installation.
c. Battery contacts require
cleaning.
c. Clean battery contacts per
section 3.2, Battery Compartment
and Battery Cap.
2. Image abruptly
turns off when in
ON or IR modes.
a. High light shutdown has
been initiated.
a. Reset (power on) the MNVD
per section 2.6. Install the
objective lens cover per section
2.5, Objective Lens Cover, if
necessary.
3. Poor or
degraded image.
a. Lens cover installed
(dark ambient conditions).
a. Remove lens cover per section
2.4, Objective Lens Cover.
b. Lens cover not installed
(bright ambient conditions).
b. Install lens cover per section
2.5, Objective Lens Cover.

42. 3-2
3.1 TROUBLESHOOTING – Continued
Table 3-1 Troubleshooting Procedures – Continued
Malfunction Probable Cause Corrective Action
3. Poor or
degraded image –
Continued.
c. Insufficient ambient
light.
c. Turn the Mode Switch to the IR
position to provide IR light source
per section 2.6, or momentarily
activate the IR LED Illuminator per
section 2.7.
d. Gain (contrast) not
adjusted to an appropriate
setting.
d. Adjust gain (contrast) to a
comfortable level per section 2.8.
e. Not focused for viewing
distance being observed
(minimum 9.8 inches).
e. Focus objective lens per
section 2.9.
f. Diopter setting not
adjusted correctly.
f. Adjust diopter setting per
section 2.10.
g. Sacrificial window
and/or demist shield
obscured by dirt, dust, or
grime.
g. Clean sacrificial window and/or
demist shield per section 3.2,
Optical Surfaces.
h. Sacrificial window
and/or demist shield
cracked or scratched.
h. Replace sacrificial window
and/or demist shield per section
2.5.
i. Objective lens and/or
eyepiece obscured by dirt,
dust or grime.
i. Remove sacrificial window
and/or demist shield. Clean
objective lens and/or eyepiece per
section 3.2, Optical Surfaces.
4. IR LED
Illuminator does
not appear to
operate or
provides
insufficient light.
a. IR LED Illuminator exit
port is dirty.
a. Clean IR LED Illuminator exit
port per section 3.2, Optical
Surfaces.
b. Viewed scene is outside
effective range of IR LED
Illuminator.
b. Limit use of IR LED Illuminator
to viewed scenes within a few
meters of the MNVD.

43. 3-3
3.2 INSPECTION / CLEANING
The operator should inspect the MNVD before each use and
after it has been in extreme conditions, such as prolonged
exposure to intense temperatures. The following procedures
will extend the life of the MNVD and help ensure safe
operation.
WARNING
Remove the MNVD from the weapon before
inspecting, cleaning, or performing other
maintenance functions.
WARNING
Prior to performing any inspection or maintenance
procedure, verify that batteries are not installed.
MNVD Housing
To clean the MNVD housing, rinse with water or mild soap
and water and then wipe dry with a soft cloth. Clean around
adjusters, levers, and interfaces with a cotton swab.
Battery Compartment
Inspect the battery compartment for dirt, dust, or corrosion.
Dirt or debris that cannot be shaken loose from the battery
compartment may be removed using a clean cloth or cotton
swab. Periodically lubricate the o-ring with fluorinated
grease. The o-ring should be replaced if it becomes cut,
nicked, or dried out per section 3.3, Replacing Battery
Compartment O-Ring. If necessary, clean battery contacts
with a cotton swab and isopropyl alcohol.

44. 3-4
3.2 INSPECTION / CLEANING - Continued
Battery Cap
Inspect the battery cap for dirt, sand, and grime. Thoroughly
clean the battery cap and o-ring by flushing with water and
wiping with a cotton swab. Periodically lubricate the o-ring
with fluorinated grease. If necessary, clean the battery
contact with a cotton swab and isopropyl alcohol.
Optical Surfaces
CAUTION
The coating on the demist shield may be damaged
if cleaned while wet. Clean the demist shield only
when dry and using dry lens tissue.
Inspect optical surfaces for dirt, dust, and grime. Except for
the demist shield, clean with water or mild soap and water.
Fine cleaning of the optical surfaces should be performed
using the provided lens tissue and lens cleaning solution, or
the flexible tip of the lens pen. Avoid using excessive force
as this may scratch the lenses. The sacrificial window and
demist shield should be replaced if scratches degrade
performance or cracks are present.
Neck Cord
Inspect the neck cord for any signs of cuts, nicks, or fraying.
Replace as necessary per section 3.3, Lens Cover / Neck
Cord Replacement.

45. 3-5
3.3 CORRECTIVE MAINTENANCE PROCEDURES
The MNVD has no internal parts or assemblies replaceable
by the user or organizational level personnel. Refer to
section 3.4 regarding maintenance and/or repair actions
beyond those described in this manual.
Replacing Battery Compartment O-Ring
No tools are required to perform this procedure.
1. Access the battery compartment by turning the battery
cap counterclockwise.
2. Use the fingers of one hand to squeeze the battery
compartment o-ring while simultaneously pushing it out of
its retaining groove. Grasp the o-ring with fingers of the
other hand and pull it off the battery compartment.
3. Ensure the o-ring retaining groove is clean and free of
debris.
4. Stretch the replacement o-ring over the battery
compartment and into its retaining groove.
Neck Cord Replacement
No tools are required to perform this procedure.
1. Feed one end of the neck cord through the channel on
the MNVD housing as shown in Figure 3-1.
2. Feed the other end of the neck cord through the tab in the
lens cover.
3. Secure both ends with a knot.
4. Place the lens cover over the objective lens.

46. 3-6
3.3 CORRECTIVE MAINTENANCE PROCEDURES –
Continued
Figure 3-1 Neck Cord Replacement

47. 3-7
SECTION II
SERVICE / PACKING AND UNPACKING
3.4 SERVICE / REPAIR
For service, repair, or replacement, first e-mail
returns.insight@l-3com.com or call toll-free 1-877-744-4803.
To assist with determining if the item is repairable, the
following information will be requested:
a. Serial number of the defective item;
b. Thorough description of the malfunction, defect, or
damage; and
c. If known, an explanation as to how the malfunction,
defect or damage occurred.
If the item is determined to be beyond economical repair,
follow applicable replacement procedures through your
Property Officer. If it is determined that the item is under
warranty, or should be returned for repair, a Return Material
Authorization (RMA) number will be provided.
When returning the MNVD for service / repair, the following
procedures should be followed to prevent any additional
damage:
1. Be sure that the MNVD is free of all contaminants such as
dirt or any other foreign material.
2. Remove battery.
3. Place the MNVD in the soft carrying case.

48. 3-8
3.4 RETURN INSTRUCTIONS – Continued
Place the item and a copy of the test report or detailed
description of the failure in a suitable packing container.
Mark the package with “Field Return” and the RMA number.
Ship via fastest, traceable, pre-paid means to:
L-3 Communications Corporation
Warrior Systems Division
Insight Operations
9 Akira Way
Londonderry, NH 03053
3.5 WARRANTY INFORMATION
The MNVD is under warranty from defects in material and
workmanship for a minimum of one (1) year from the date of
manufacture. This warranty does not protect against
damage due to misuse, mishandling or battery leakage.
Additional warranty coverage may have been provided
through the contract or via subsequent contract extension.
Specific warranty terms can be obtained from your
procurement agent, Contracting Officer or L-3 Warrior
Systems, Insight.
3.6 NON-WARRANTY INFORMATION
Non-warranty repairs are subject to an evaluation fee. The
item will be tested and evaluated for failure, then customer
permission and payment terms are obtained prior to any
repairs being performed.

49. A-1
APPENDIX A
REPAIR PARTS LIST
SCOPE
This Appendix lists end item components and repair parts for
the MNVD.
Figure A-1 End Item Components
1
3 4
5
6
78
9
10
11
12
13
14
16
15
2

50. A-2
SCOPE – Continued
Table A-1 List of End Item Components
ITEM
NO.
NATIONAL
STOCK NUMBER
PART
NUMBER
DESCRIPTION QTY
1 8415-01-560-1800 7B435 Browpad, Medium 1
2 8415-01-560-1799 7B436 Browpad, Thick 1
3 TBD 7B268 Headmount Assembly 1
4 TBD 7B262 Soft Carrying Case 1
5 N/A MNVD-TM-ITI Operator Manual 1
6 N/A MNVD-QRG-ITI Quick Reference Guide 1
7 6760-01-556-4306 7B626 Lens Tissue 1
8 TBD MND-187 Retaining Cord 1
9 TBD 7B264 Sacrificial Window 1
10 5855-01-444-1230 MND-200 Demist Shield 1
11 TBD MND-160 Adapter, Headmount / Helmet Mount 1
12 TBD MND-140 Mount Assembly, Weapon 1
13 6650-01-444-1229 A3256345 Eyecup, Shuttered 1
14 N/A 245000
MNVD Assembly
(see Figure A-2 for parts breakdown)
1
15 6135-01-559-9637 M30-044 Battery, 1.5V, AA Lithium 2
16 8465-01-559-8427 7B267 Shoulder Strap Assembly 1
- 8415-01-598-3125 7B280
Browpad, Thin
(pre-installed on Headmount Assembly)
1

51. A-3
SCOPE – Continued
Figure A-2 MNVD Assembly
Table A-2 List of Repair Parts
ITEM
NO.
NATIONAL
STOCK NUMBER
PART
NUMBER
DESCRIPTION QTY
1 5855-01-556-2660 7B422 Eyecup, Standard 1
2 4520-01-455-6662 7B306 Neck Cord 1
3 TBD 7B318 Lens Cover 1
4 TBD A3256356 O-Ring, Battery Compartment 1
1
2
34

53. B-1
APPENDIX B
ACCESSORIES
SCOPE
This Appendix lists accessories available for support of the
MNVD.
Table B-1 List of Accessories
NATIONAL STOCK
NUMBER
PART NUMBER DESCRIPTION
QTY
RECM
TBD ICS-024-US Compass 1

55. The MNVD
Is designed and produced by:
L-3 Communications Corporation
Warrior Systems Division
Insight Operations
9 Akira Way
Londonderry, NH 03053
USA
Phone 603.626.4800 / Fax 603.626.4888
www.l3warriorsystems.com
This manual contains technical data whose export is governed
by the U.S. International Traffic in Arms Regulations (ITAR).
This information must not be transferred to a foreign person
without the proper authorization of the U.S. Government. Please
contact L-3 Warrior Systems for more information.
© 2011 L-3 Communications Corporation
Warrior Systems Division