Ptw82a1.tmp Ch2

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TC 23-11

CHAPTER 2

MECHANICAL TRAINING

Section I. DISASSEMBLY AND ASSEMBLY

6. General.

The purpose of mechanical

training is to give the operator a knowledge of

the basic functioning, controls, and adjustable

parts of the Starlight Scope so that he will under-

stand its operation and be able to properly care

for it.

The operator is authorized to disassemble

the Starlight Scope

only

to the extent described

in paragraph 7.

Even though detail disassembly is not

authorized, this should not preclude teaching the

operator the nomenclature of the component

parts and accessories.

The Starlight Scope should be disassembled

and assembled only when necessary for instruction

or maintenance.

7. Disassembly.

Caution:

Before releasing the shipping con-

tainer's latches, turn the core of the relief valve

as instructed on the side of the shipping container.

This valve will release any internal pressure in

the shipping container that may have built up

during storage or shipment.

a. Shipping Container.

(1)

(2)

(3)

Place the shipping container flat on the

ground or table and raise the latches to

remove the lid from the bottom of the

container.

Remove the Starlight Scope and acces-

sories from the container.

The top and bottom foam contour liners

are force-fitted into the shipping con-

tainer. There are no screws or bolts

holding them in place. The liners are

removed by forcefully pulling them from

the shipping container.

b. Starlight Scope.

The operator is authorized

to remove the objective lens cap, focusing knob

and locking lever, azimuth and elevation adjust-

ment knobs, battery cap, rubber eyeshield, and

the telescope mount assembly.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

The objective lens focusing knob is re-

moved by using the allen wrench and

unscrewing the socket head screw located

in the center of the knob. Lift the knob

from the collet (fig. 4).

Remove the locking lever from the collet

by turning counterclockwise (fig. 4).

The azimuth adjustment knob is removed

by using the allen wrench to loosen the

socket head screw located on the side of

the knob. Lift the knob from the sight

plate (fig. 5).

The elevation adjustment knob is re-

moved as described in (3) above (fig. 6).

Remove the battery cap from the battery

housing by turning in a counterclockwise

direction (fig. 9).

The rubber eyeshield is removed by

forcefully pulling it from the eyepiece

assembly (fig. 7).

Remove the two locking screws which

secure the telescope mount assembly to

the main housing (fig. 8).

Note.

A screwdriver is required for this

operation.

8. Assembly.

The sequence in which the dis-

assembled parts are assembled is not important;

however, during training the operator should use

the reverse procedure of disassembly.

a. Starlight Scope.

Aline the telescope mount assembly with

the mounting studs on the base of the

main housing and secure with the two

locking screws.

(1)

TC 23-11

(2)

(3)

(4)

(5)

Replace the rubber eyeshield on the

(6) Seat the focusing knob onto the collet

eyepiece assembly.

and secure with the socket head screw.

Replace the battery cap on the battery

b. Shipping Container.

housing.

(1)

Position the elevation and azimuth ad-

justment knobs onto the sight plate and

secure by tightening the socket head

screws.

Replace the locking lever to the collet

(2)

and turn until finger tight. Unthread

the locking lever ½-turn to provide the

(3)

required movement for locking and un-

locking action.

Insert foam liners in top and bottom of

shipping container.

Make certain the

cutouts in the top and bottom match so

that the lid will close when the Starlight

Scope and accessories are installed.

Replace the Starlight Scope and acces-

sories in the shipping container.

Aline the lid with the bottom of the

shipping container and secure with latch

and latch clasps.

TC 23-11

Section II. OPERATION AND FUNCTIONING

9. Operation. a. General. The Starlight

Scope, although designed to function under the

most rugged conditions, is a precision electro-

(2)

optical instrument and must be handled carefully.

b. Precautions.

To prevent damage to the

equipment and injury to himself, the operator

should observe the following safety precautions:

(1)

The contents of the mercury battery are

highly irritable to the eyes and oral and

nasal tissues; therefore, caution must be

exercised when handling and discarding

(3)

the batteries. To prevent explosion, the

battery should not be disposed of by

fire. Batteries should be disposed of by

burying, or dumping them into a large

body of water.

When the image intensifier tube is in-

advertently exposed to intense light, it

will automatically cut off to prevent

burning out the tube and to protect the

operator’s eye. Continuous exposure of

an activated tube to intense light should

be avoided.

The Starlight Scope should never be

aimed directly at the sun (image intensi-

fier tube ON or OFF) since it will result

in a complete failure of the tube.

TC 23-11

When operating the Starlight Scope, care

must be taken in the viewing procedure.

If the rubber eyeshield is not positioned

around the eye and against the face,

visible light emitted from the eyepiece

assembly will “leak” around the eye-

shield, illuminating the operator’s face.

c. Preoperational Inspection.

Open the shipping container as described

in paragraph 7a(l) and remove the

Starlight Scope.

Visually inspect all external parts, sur-

faces, and threads for dust, cracks, chips,

or other damage.

Visually examine the

objective lens assembly and eyepiece

assembly for lens fogging or other signs

of moisture.

Operate the focusing and

adjustment knobs to determine their

operability.

Check the telescope mount assembly to

insure it is secured to the main housing.

Inspect lock knobs for freedom of move-

ment. Examine guide groove for burrs,

cracks, or any other damage that would

prevent mounting.

During daylight operations, insure the

lens cap is properly positioned over the

objective lens assembly.

d. Installation of Battery.

Insure control switch is in OFF (center)

position.

Remove. battery cap as described in

paragraph 7

(5).

Insert battery, positive end first, into the

battery housing (fig. 9). To identify

the positive end, note the (+) or (–)

markings on opposite ends of the battery.

Should it be necessary to install a

battery during the hours of darkness,

the positive end can readily be identified

by feeling for the “raised portion”

located on the positive end of the

battery.

Replace the battery caps as instructed in

paragraph 8

(3).

e. Operational Sequence.

A definite sequence

should be used when placing the Starlight Scope

in operation. This sequence should be continu-

ously stressed with the new operator until it

become second nature and automatic. To place

(4)

(1)

(2)

(1)

(2)

(3)

(4)

(3)

(4)

the Starlight Scope in operation during the hours

of daylight (the lens cap must be positioned over

the objective lens) or darkness:

Position the rubber eyeshield around

the eye so as to prevent the visible light

emitted from the eyepiece assembly

from illuminating other areas of the face.

Move the control switch to the ON

(passive reticle) position. If the reticle

pattern is not visible, move and hold

the control switch in the reticle CHARGE

position. Normally, a 5-second charge

is sufficient to activate the reticle.

Return control switch to the ON position.

Focus the eyepiece assembly by rotating

the eyepiece focus ring until the reticle

pattern is sharp and clear.

Point the Starlight Scope at a distant

target.

After insuring the objective lens

focusing knob locking lever is in the unlocked

position,

rotate the focusing knob until

the image being viewed is clear and

sharp. To retain a clear and sharp

image, the operator must make an

objective lens focal adjustment whenever

the range between the Starlight Scope

and the target changes.

After operation, return the control switch

to the OFF position and remove the

rubber eyeshield from the eye.

Caution:

When removing the “non-

secure” rubber eyeshield from the eye,

the operator must exercise care to pre-

vent the visible light from illuminating

his face or l portion of his body. When

the Starlight Scope is turned off, visible

light will continue to be emitted from the

eyepiece assembly for a few moments.

f. Extreme Cold.

A low temperature adapter

assembly is provided as a special accessory to the

Starlight Scope to permit operation in tempera-

tures as low as –65° F. The assembly is installed

(fig. 10) to the Starlight Scope as follows:

Insure the control switch is in the OFF

position.

Remove the battery cap and battery

from the battery housing.

Insert the low temperature adapter tube

into the battery housing and turn the

tube cap clockwise until secured.

(5)

(1)

(2)

(3)

(4)

(1)

(2)

(3)

TC 23-11

(4)

(5)

(6)

Insert the battery, positive end first,

into the adapter battery case.

Secure

with the buttery cap from the Starlight

Scope.

The battery and adapter buttery case

are carried inside the operator’s clothing

for protection against extreme low

temperatures.

Once the low temperature adapter as-

sembly has been installed, the Starlight

Scope is operated in the normal manner.

The lenses may have a tendency to fog

and frost up in cold weather and will

require frequent clearing. The operator

should avoid breathing into the rubber

eyeshield as this will increase the fogging

and frosting of the eyelens.

g. Extreme Heat.

The Starlight Scope is de-

signed for operation without damage at tempera-

tures up to +125° F.

h. Dusty or Sandy Conditions.

The lens will

require frequent cleaning when the Starlight

Scope is operated in dusty or sandy areas. The

operator should first remove most of the accumu-

TC 23-11

lated dust or sand with the lens cleaning brush,

then use the lens tissue for thorough cleaning

of the lenses.

i. Rainy or Humid Conditions.

The Starlight

Scope is capable of satisfactory operation in

rainy or humid conditions.

Caution:

To prevent corrosion or deteriora-

tion, thoroughly dry all parts of the Starlight

Scope after exposure to rain or high humidity.

10. Functioning.

For reasons of clarity and to

preclude discussions of a classified nature, only

the basic functioning of the Starlight Scope is

described in this training circular.

a. Power Supply.

When the control switch

is moved to the ON position, the 6.75-volt battery

furnishes power to the oscillator. The oscillator

receives this 6,75 voltage and increases it to

2,800 volts. The increased voltage is transmitted

to the multiplier plate of the image intensifier

tube. The multiplier plate insures that each

stage of the three-stage image intensifier tube

receives the required voltage for operation.

b. Objective Lens Assembly.

The objective lens

assembly, utilizing the ambient light of the night

sky, focuses an image of the scene being viewed onto

the front face (cathode) of the image intensifier

tube. Under nighttime illumination conditions,

this image is very dim and not visible to the

naked eye.

c. Image Intensifier Tube.

The image inten-

sifier tube receives the dim image and transmits

it to the screen (anode) at the rear of the tube.

In so doing, the brightness of the image is amplified

to such a degree it can be seen with the naked eye.

d. Eyepiece Assembly.

The eyepiece magnifies

and focuses the image, enabling the operator to

view the amplified image displayed on the anode

of the image intensifier tube.

e. Sight Reticle.

The sight reticle pattern (fig. 3)

is composed of eight reticle beads. Positioned

in the center of each bead is a small dot of phos-

phor. The phosphor, when subjected to radia-

tion, gives off light.

The intensity of light

radiation striking the phosphor determines the use

of the PASSIVE or CHARGED reticle.

(1)

(2)

When the control switch is moved to the

ON passive reticle position, light radia-

tion from the night sky entering the

Starlight Scope through the objective

lens strikes the phosphor dots causing

them to illuminate. Under moonlight

rind/or starlight conditions, light radia-

tion is intense enough to illuminate the

phosphor dots.

When operating the Starlight Scope

under low light level conditions (no

moonlight or starlight), the intensity of

light may not be sufficient to activate

the phosphor dote.

To compensate for

this, the operator moves the control

switch to the reticle CHARGE position,

turning on the sight reticle lamps. The

intensity of light emitted by the lamp is

sufficient to charge the phosphor dots.

It may be necessary to maintain the

reticle CHARGE position of the control

switch for a few seconds to provide an

adequate charge to the phosphor dote

(switch is spring loaded and auto-

matically returns to the OFF position

when pressure is released). After charg-

ing, the control switch must be manually

returned to the ON position to resume

operation.

Caution:

When charging the reticle,

the operator should insure the lens cap

is positioned over the objective lens to

prevent the visible light, emitted by the

sight reticle lamp, from being detected.

TC 23-11

Section III. INSTALLATION

18. Weapons Adapter Brackets.

a. M414 or

M14A2 Rifle.

Aline the weapon adapter bracket

with the groove and screw recess on the left side

of the receiver (fig. 11). Secure the bracket to

the receiver by tightening the socket head screw

of the bracket with the allen wrench.

b. XM16E1 Rifle.

Unthread the wingnut to

the threadstop on the screw of the weapon adapter

bracket (fig. 12). Pull tab away from the bracket

and slide the mounting ear under the carrying

handle of the rifle. Position the slotted groove

in the hose of the bracket over the top of the

receiver group inside the opening of the carrying

handle. Firmly tighten the wingnut until the

tab is pulled tightly against the carrying handle

and bracket.

c. M72 Light Antitank Weapon.

Position the

weapon adapter bracket on the tube of the weapon

so that the bracket notch and location stops engage

the front of the firing mechanism. Swing the

hinged lower clamp around the bottom of the tube,

and engage and secure the dial lock latch (fig. 13).

d. 90-mm Recoilless Rifle M67.

Position the

backup plate of weapon adapter bracket against

the inside of the M103 sight mounting bracket

(fig. 14). Place the mounting pad of the bracket

against the left side of the M103 sight mounting

bracket so that the screw holes in the mounting

pad mate with the screw holes in the backup

plate. Install and tighten the three socket head

screws with the allen wrench.

e. M60 Machinegun.

The weapon adapter

bracket for the M60 machinegun consists of n

saddle block and a sight, adopter bracket (fig. 15).

TC 23-11

To install the saddle block to the M60 machinegun,

refer to figure 16 and mount as follows:

Clear the M60 machinegun as outlined

in FM 23-67.

Remove barrel group (1, fig. 16).

(4)

Cock the weapon.

Place safety (1) on the SAFE position.

Raise barrel lock lever (2).

Pu11 barrel group (3) straight forward

(4).

(1)

(2)

(a)

(b)

(c)

(d)

(3)

and remove.

Caution:

With the barrel group re-

moved, do not allow the bolt to go

forward as this will cause damage to the

cam roller on the bolt.

Apply pressure to the cartridge,

releasing the forearm latch; raise the

rear of the forearm assembly slightly and

remove it to the front (5).

Remove barrel lock lever and barrel

locking shaft ( fig. 16).

Caution:

The detent plunger (6) and

detent spring (7) are under spring ten-

sion. Before removing lock pin (8),

place hand over top of barrel lock lever

(9) to prevent loss of parts upon removal

of lock pin. Insure barrel lock lever is

in vertical position.

Remove forearm assembly (

fig. 16).

Remove lock pin (8), detent pin (1O),

Insert nose of cartridge into the latch

detent spring (7), and plunger (6)

hole in the bottom of forearm assembly

from barrel lock lever (9).

(a)

TC 23-11

(6)

Withdraw barrel lock shrift (11) from

left side of receiver group and remove

barrel lock lever.

Installation of saddle block (

(b)

(5)

fig. 16).

(a)

(b)

(c)

Loosen four set screws (13) and (14)

(two set screws are located on each

side of the saddle block). Remove

saddle lock shaft from saddle block

(15).

Place saddle block in position

weapon (12), insuring the half moon

recess on left side of the saddle block

is seated under the windage knob or

the rear sight.

Replace barrel lock lever and insert

saddle lock shaft (from the left side

of the machinegun) into its recess in

the saddle block (15). Insure the half

moon cut on the saddle lock shaft is

positioned down when replacing the

shaft.

(d)

(e)

Reassemble barrel lock lever (reverse

procedure given

in paragraph (4)

above) onto the saddle lock shaft.

Tighten four set screws (13) and (14)

and tighten saddle block screw (16).

Note. Since the saddle block will not

interfere with normal operation of the

machinegun, it should not be removed aftcr

installation. Install the sight adaptcr bracket

whenever the Starlight Scope is to be used.

Sight adapter bracket installation (

fig. 16).

(a)

(b)

(c)

Plato sight adapter bracket (19) in

place against saddle block (12).

Install and tighten lock washer (17) and

screw (18) through sight adapter

bracket into saddle block.

Replace forearm assembly and barrel

group by reversing procedure given in

(2) and (3) above.

f. 40-mm Grenade Launcher M79.

The weapon

adapter bracket for the M79 is not being produced

currently. A discussion of the correct mounting

procedures is withheld pending receipt and testing

of the item.

12. Starlight Scope.

a. General.

Regardless

of which weapon the Starlight Scope is employed

with, the procedure for mounting to the weapons

adapter brackets are the same. Each weapon

adapter bracket has an identical guide rail (fig.

17)

which mates with the telescope mount assembly

of the Starlight Scope.

b. Mounting.

The Starlight Scope is mounted

to the weapon adapter bracket as follows:

(1)

(2)

(3)

Rotate lock knobs of the telescope

mount assembly forward (toward ob-

jective lens) until they come to stop

on the pins Iocated on the assembly,

Slide the telescope mount assembly onto

the guide rail of the weapons adapter

bracket from the rear until positioned

against the pin stop of the guide rail.

The Starlight Scope is locked to the

weapons adapter bracket by rotating

the two locking knobs of the telescope

mount assembly in a rearward direction.

TC 23-11

Section IV. MAINTENANCE, TROUBLESHOOTING, AND DESTRUCTION

13. General.

This section contains information

on maintenance, troubleshooting, and destruction.

The discussion on maintenance is confined to that

information necessary for the operator to main-

tain the Starlight Scope. For information con-

cerning organizational and higher echelons of

maintenance see TM 11-1090-268–15.

14. Tools and Equipment.

The wrenches,

batteries, and other accessories contained in the

shipping container, with the exception of a screw-

driver, provide the tools and equipment necessary

for operator maintenance. A screwdriver is re-

quired to disassemble the telescope mount as-

sembly from the main housing.

15. Care and Cleaning.

a. General.

To insure

the Starlight, Scope is ready for operation at all

times, inspect it systematically to discover and

correct defects before serious damage or failure

results.

Note defects during operation and insure

appropriate corrective action is taken upon

completion of operations. All defects, deficiencies,

and corrective action taken will be recorded on

DA Form 2404 (Equipment Inspection and

Maintenance Worksheet) at the earliest oppor-

tunity.

b. Special Instructions.

(1)

(2)

(3)

Clean exposed glass surfaces of the

objective lens and eyepiece lens by

removing loose dirt with the lens brush

and then clean the glass surfaces with

lens tissue. Dampen lens tissue with

water if necessary (distilled water if

available).

Clean all exposed metal surfaces on the

Starlight Scope and low temperature

adapter assembly with a cloth. Dampen

cloth with water if necessary.

No lubricating materials are required

by the operator for maintenance of the

Starlight Scope.

c. Daily Preventive Maintenance.

The operator

must perform

the following daily preventive

maintenance services:

Inspect and service the shipping container

(1)

TC 23-11

for dirt, dents, holes, damaged latches,

latch clasps, missing parts, identification

and instruction plates, and for movability

of pressure relief valve. If unservice-

able, replace the shipping container.

Remove the Starlight Scope and acces-

sories from the shipping container and

inspect top and bottom liners for tears,

dirt accumulation, and water-soaked

condition. Remove loose dirt with a

soft brush and clean with a damp cloth.

Remove wet liners and allow to dry.

Replace liners if damaged.

Inspect and service canvas carrying case

for holes, tears, dirt, and water-soaked

condition. If damaged or mildewed, re-

place canvas carrying case.

Inspect and service main housing of

Starlight Scope for dents, cracks, and

loose or missing parts. Tighten loose

parts and report missing parts or

damaged main housing to organizational

maintenance.

Inspect and service objective and eyepiece

lenses for dirt, dust, cracks, scratches,

and signs of fogginess or moisture. If

lenses are scratched, cracked, and foggi-

ness or moisture appears to be within

the objective or eyepiece assembly,

report condition to organizational main-

tenance.

Inspect objective lens focus knob and

locking lever for dirt, free operation,

positive locking action, or damage.

Remove

only

the focus knob and locking

lever if dirty or damaged. Clean the

focus knob and locking lever and reas-

semble to the collet. Replace damaged

knob or lever and reassemble. Report

faulty operation of focus knob or locking

lever to organizational maintenance.

Inspect the azimuth and elevation adjust-

ment knobs for dirt, damage, and

freedom of operation. Remove

only

the

azimuth or elevation adjustment knobs

if dirty or damaged. Clean dirty knob

and reassemble. Replace damaged knob

and reassemble. Report faulty opera-

tion to organizational maintenance.

Inspect battery for corrosion, leakage, or

(9)

(2)

(10)

(3) (11)

(4)

(5)

other damage.

Dispose of a defective

battery.

Remove battery cap from battery housing

and inspect and service for dirt, cracks,

dents, and damaged battery spring or

O-ring. Replace damaged battery cap,

spring, or O-ring. Install new battery

and reassemble battery cap.

Inspect exterior of oscillator cap for

dirt, cracks, and dents.

Do not

remove

oscillator cap from oscillator housing.

Clean outside surfaces only. Report

damaged oscillator cap to organizational

maintenance.

Although the operator is not authorized

to remove the oscillator cap, it is possible

to check the functioning of the oscillator.

Move the control switch to the ON

position and listen for operating hum

which is audible if oscillator is working.

If operating hum cannot be heard,

report condition to organizational

maintenance.

With control switch in the ON position,

look into the eyepiece and inspect for

operation of the image intensifier tube.

Do not attempt removal of the image tube

from the main housing.

Return control

switch to the OFF position.

Report

all failures or malfunctions of image tube

to organizational maintenance.

Inspect telescope mount assembly for

cracks, breaks, dents, dirt, and oper-

ability of locking knobs. Service and

replace as required,

Inspect rubber eyeshield for dirt, oil,

cracks, flexibility, and other damage.

Remove eyeshield if dirty or damaged.

Clean with a clean, wet cloth. Replace

damaged eyeshield and assemble new

eyeshield onto the eyepiece assembly.

Insuring the control switch is in the

OFF position, remove the lens cap and

inspect for dirt, obstructed holes, cracks,

or other damage.

Clean with wet cloth

and reassemble to objective lens as-

sembly, Replace damaged lens cap and

reassemble.

16. Troubleshooting.

This paragraph provides

information useful in diagnosing and correcting

(12)

(6)

(13)

(14)

(7) (15)

(8)

TC 23-11

unsatisfactory operation or failure of the Starlight

site the probable cause. Since the operator is

Scope. Each trouble symptom stated is followed

limited to only minor corrective actions, most

by a list of probable causes of the trouble. The corrective measures will be performed at orga-

possible remedy recommended is described oppo- nizational or higher support levels.

TROUBLESHOOTING GUIDE

(1)

(2)

(3)

Probable cause

a. Objective Lens Will Not Focus.

Damaged eccentric shaft. . . . . . . . . . . . .

Damaged focus knob. . . . . . . . . . . . . .

Damaged objective lens assembly. . . . . . . . .

b. Eyepiece Assembly Will Not Focus.

Damaged eyepiece focus ring

. . . . . . . . . .

Dirt or sand accumulated around focus

ring.

(1)

(2)

(3)

(1)

(2)

c. Weak or No Illumination of Imaae Intensifier Tube.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Weak or defective battery . . . . . . . . .

Defective oscillator

. . . . . . . . . . . . . . . . . .

Defective image intensifier tube.

. . . . . . . . .

Defective control switch

. . . . . . . . . .

Loose battery cap

. . . . . . . . . . . . . . . . . . . . . . . . .

Defective battery cap spring

. . . . . . . . .

Defective oscillator cap and/or assembly

d. Image Blurred.

Objective lens dirty or fogged . . . . . . .

Eyepiece lens dirty or fogged

. . . . . . .

Objective lens out of focus

. . . . . . . .

Eyepiece out of focus

. . . . . . . . . . . .

Weak battery

. . . . . . . . .. . . . . . . . . . . .

Defective oscillator

. . . . . . . . . . . . . . . . . .

Defective image intensifier tube . . . .

. . . . .

Defective objective lens assembly

. . . . . . . . .

Defective eyepiece assembly . . . . . . . .

. . . . . . .

e. Focusing Knob Will Not Rotate.

Dirt or sand accumulated around

focusing knob.

Locking lever dammed . . . . . . . . . . . . . . .

Collet damaged . . . . . . . . . . . . . . . . . . . . .

f. Control Switch Will Not Detent.

Defective control switch . . . . . . . . .

Possible remedy

Report to organizational maintenance.

Replace focus knob.

Report to organizational maintenance.

Clean area around focus ring.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Replace battery.

Report to organizational maintenance.

Tighten battery cap.

Replace battery cap spring.

Report to organizational maintenance.

Clean lens.

Adjust by rotating focus knob.

Adjust by rotating eyepiece focus ring.

Replace battery.

Report to organizational maintenance.

Clean focusing knob.

Replace locking lever.

Report to organizational maintenance.

(1)

(2)

(3)

(2)

(3)

(1)

(2)

(1)

(2)

g. Elevation or Azimuth Adjustment Knob Will Not Rotate.

Dirt or sand accumulated around knob. . . .

Defective adjustment assembly . . . . . . . .

Report to organizational maintenance.

h. Reticle Will Not Adjust.

Defective azimuth or elevation adjust-

Report to organizational maintenance.

ment knob assembly.

(1)

TC 23-11

(1)

(2)

(3)

Defective reticle lamp . . . . . . . .

Defective power switch . . . . . . .

Weak or defective battery . . . . .

(1)

(2)

(3)

TROUBLESHOOTING GUIDE—Continued

Probable cause Possible remedy

i. Reticle Lamp Will Not Illuminate.

Report to organizational maintenance.

Replace battery.

j. Low Temperature Adapter Assembly Will Not Operate.

(1)

(2)

(3)

Wrong polarity

of battery in adapter . . . . . . .

battery case.

Defective or weak battery . . . . . . . .

Defective cable assembly . . . . . . . .

k. Starlight Scope Will Not Mount on Weapon.

Dirt or sand between mounting grooves. . . . . .

Telescope mount assembly damaged. . . . . . . .

Damaged weapn adapter bracket . . . .

(1)

(2)

(3)

(1)

(2)

(3)

(4)

(1)

(2)

(3)

Damaged lock knobs . . . . . . . . . . . . .

17. Destruction To Prevent Enemy Use.

(4)

General.

(1)

(2)

Destruction of the Starlight Scope and

related material, when subject to capture

or abandonment in the combat zone, will

be undertaken by the using unit when,

in the judgment of the unit commander,

such action is necessary in accordance

with the unit’s mission, or policy estab-

lished by the commander concerned. If

at all possible, the Starlight Scope should

be evacuated.

When the commander concerned con-

(a)

(b)

(c)

siders it necessary, he orders the Star-

light Scope’s destruction to prevent one

or more of the following:

Capture by the enemy.

Abandonment in the combat zone.

To deprive enemy intelligence agencies

knowledge of its existence, functioning,

or exact specifications.

b. Principles of Destruction.

Destruction should be as complete as

possible within limitations of time and

equipment. In any event, the most

important parts are destroyed or evacu-

ated.

The same essential parts are

destroyed or evacuated in all units to

prevent the enemy from constructing

Reverse position of battery.

Replace battery.

Report to organizational maintenance.

Clean telescope mount assembly.

Replace telescope mount assembly.

Replace weapon adapter bracket.

Replace telescope mount assembly.

(2)

(3)

(4)

one complete Starlight Scope from several

damaged ones.

Personnel are trained in the prescribed

methods of destruction.

The issue and use of special equipment,

such as incendiary grenades, are com-

mand decisions and depend on the

tactical situation.

Methods described are listed in the order

of their effectiveness. Follow the se-

quence in which the steps are given.

Methods of Destruction.

(1)

(2)

Destruction by burning.

Stand the Star-

light Scope on end, preferably in a hole,

with the objective lens up. Position a

thermate grenade on the objective lens

and pull the pin.

Insure that the grenade

has destroyed the optics and image

intensifier tube.

Destruction by weapons fire.

Place the

Starlight Scope on end, preferably in a

hole, with the objective lens up. Fire

one or more rounds into the Starlight

Scope through the objective lens. Insure

that the round(s) penetrates completely

through the objective lens, reticle lens,

image intensifier tube, and the eyepiece

assembly.

(1)

Ptw82a1.tmp Ch2

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