Night Optics TG-7 Thermal Goggle/Binocular (30Hz) - Manual (Page 14)

CHAPTER 7. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND TROUBLESHOOTING
7-1. Preventive Maintenance Checks: The table of Preventive Maintenance Checks provides
inspection criteria to ensure proper operator-level maintenance of the NO/TG-7 system and required
evacuation for additional maintenance services.
Seq Interval Item to Check Procedure
Evacuate to
Maintenance if:
1
Before/
After
Optical surfaces
Inspect all lenses for dirt, fingerprint
residue, chips or cracks. If necessary,
clean and dry lenses as prescribed in
4-5 above. Scratches or cracks
hinder vision with
goggle turned on, or if
cracks are present.
2
Before/
After
External surfaces
Inspect for cracks or damages.
Scratches and gouges are OK if
operation is not affected.
Cracked or damaged.
3.
Before/
After Battery
compartment Ensure battery cap, battery cap
retainer and o-ring are present.
Cap or o-ring is missing
or contacts are
damaged or corroded.
4.
Before/
After
Diopter
Adjustment
Rings Rotate diopter rings to ensure
eyepieces move freely and are not
loose. Range is almost ½ turn.
Binding, not moving
freely or too loose.
5.
Before/
After
Eyecups
Inspect for: dirt, cracked or torn cups;
bent, broken or improperly fitting
eyecup ring. If necessary, clean with
water.
6.
Before/
After Interpupillary
Adjustment Slide each eyepiece back and forth to
check for binding or looseness.
Inability to achieve or
maintain interpupillary
adjustment.
7.
Before/
After Object lens
focus.
Rotate objective lens to ensure free
movement (range is approximately
1/3 turn).
Not free moving.
8.
Before/
After
RESET/OFF-ON-
IR/PULL Switch
Knob
Remove any batteries and turn the
switch knob from RESET/off to ON to
IR/PULL. Each position should have a
definite stopping point. Inspect for
broken or missing knob.
Switch has no definite
stopping points or
knob broken or
missing.
9.
Before/
After
Latch Inspect for damage. Damaged.
10.
Before/
After Neck cord and
Lens Cap
Inspect for cracked, torn, or missing
lens cap. Inspect cord for cut,
damage, or frayed ends. Re-tie ends if
necessary.
11.
Before/
After
Viewed image.
With fresh batteries inserted, turn ON
as per 3-2.
12.
Before/
After
Lenses
Inspect for indication of moisture
inside housing.
Any indication of
moisture inside
housing.
The operator of the NO/TG-7 is restricted to the simple cleaning of the exterior body and optical
surfaces; exchange of batteries; and replacement of the objective lens-cap, eyepiece and neck lanyard.
Refer all other discrepancies to support maintenance. If the equipment malfunction is not listed or
actions listed do not correct the fault, notify the next higher echelon of maintenance or Night Optics
USA, Inc.