TM 9-1240-382-34
TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
FOGGY VISION THROUGH IMAGE INTENSIFIER
ELBOW.
NOTE
Cover objective lens and
apply 24 volts dc power
to the elbow assembly.
Step 1.
Check for proper focus adjustment using the
green ring and diopter ring.
a. Adjust either ring.
b. If vision is still foggy proceed to step 2.
Step 2.
Check for fingerprints or dirt on all exposed
optical surfaces.
a. Clean optics as required.
b. If vision is still foggy, proceed to step 3.
Step 3.
Check for condensation inside head or elbow.
a. If moisture is present, check for defective
sealing or a defective valve.
c. If sealing is defective, repair where authorized
or replace elbow.
d. Purge and charge assembly (p 2-30).
5.
FOGGY VISION THROUGH DAYLIGHT BODY.
Step 1.
Check for proper focus adjustment.
a. Adjust focus ring.
b. If vision is still foggy, proceed to step 2.
Step 2.
Check for dirt or fingerprints on all exposed
optical surfaces.
a. Clean optics as required.
b. If vision is still foggy, proceed to step 3.
Step 3.
Check for condensation inside head or body.
a. If moisture is present, check for defective
sealing or a defective valve.
c. If sealing is defective, repair where authorized
or replace body.
d. Purge and charge assembly (p 2-30).
6.
NO ELECTRICAL POWER WHEN EMERGENCY
POWER IS CONNECTED
Step 1.
Check emergency power source.
Step 2.
Check diode for open circuit (p 2-12).
2-4
