TM 55-4920-390-13&P
TABLE 6-1. TROUBLESHOOTING CHECK CHART
Item
Trouble
Probable Cause
Corrective Action
1.
Broken Flash Tube.
Abusive handling.
Replace with spare as in
5-2.
Note - Air leak in a
flash tube from a small
break causes a weak,
violet flash.
2.
Light output gradually
a) Flash Tube used
Replace with spare as in
falls below useful
beyond its useful
5-2.
level.
life as evidenced
by darkened bulbous
center.
b) Flash Tube not
Check for crisp spot of light
focused.
on wall 10 to 30' distant.
Focus as in 5-2, a thru c,
and 5-2, h thru k, if focus-
ing is indicated.
c) Dull (dirty)
Remove plastic cover from
reflector.
front of hand-held lamp as
in 5-2, b. Clean reflector
with soft dry cloth or tissue.
It is permissible to use a non-
oily solvent, or water, as
required. Check focus and
re-focus as in (b) above if
required. If necessary,
replace as in 5-9.
3. Light fails to flash.
a) No DC power.
Check that DC source is
"hot", check fuses, connec-
tor, cables, etc. Remember
trigger on pistol grip must
be depressed.
b) No signal.
"Vernier" control on back
1-4) must be turned CW
6-2