Table 6.1 Preventive Maintenance Checks and Services for ATN NVM-14 (cont.)

Item

Interval

Location Item to

Procedure

Not Fully Mission

No.

 

Check/Service

 

Capable If

 

 

 

Check to make sure battery adapter

Adapter is missing,

 

 

 

is present. Remove battery adapter

 

 

Battery Adapter /

contacts damaged or

4.

Before/After

Compartment

and inspect for corrosion, moisture,

corroded, or o-ring is

 

 

 

corroded or defective contacts, and that

missing.

 

 

 

o-ring is present.

 

 

 

 

 

 

 

 

Diopter Adjust-

Rotate diopter adjustment ring to make

Binding, not moving

5.

Before/After

ment Ring

sure the eyepiece is not too tight or too

freely or too loose.

 

 

 

loose. Range is approximately ½ turn.

 

 

 

 

Inspect for dirt, dust, and cracked or torn

 

6.

Before/After

Eyecup

cup. Inspect for bent, broken or improp-

 

erly fitting eyecup. If necessary, clean

 

 

 

 

 

 

 

 

with water.

 

 

 

 

 

 

 

 

Objective Lens

Rotate objective lens focus knob

Binding or not moving

7.

Before/After

to ensure free movement (range is

Focus Knob

freely.

 

 

 

approx. 1/3 turn

 

 

 

 

 

 

8.

Before/After

Lens Cap

Inspect for cracked, torn, or missing

 

lens cap.

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn switch OFF to ON. Each position

Switch has no definite

9.

Before/After

On/Off Switch

should have a definite stopping point.

stopping points or knob

 

 

 

Inspect for broken or missing knob.

is broken or missing.

 

 

 

 

 

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Image 47
ATN 3 manual Missing