TM 5-6675-323-14
Table 6-4. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LIGHT GRIDS ARE TOO DIM OR TOO BRIGHT.
Measure light intensity to determine if high and low level potentiometers on
c a r d Al or A2 are out of adjustment.
Adjust light grid intensity to 2500 and 500 ft lamberts (paragraph
2. Z-AXIS MOVEMENT IS SLUGGISH OR HARD TO MOVE.
Test for free movement without binding.
If movement binds or lugs, adjust, and lubricate Z-axis as
required (paragraph 6-20.4).
3.
LIGHT GRID LIGHTS BUT INTENSITY WILL NOT CHANGE.
Reverse connector to dimmer card.
NOTE
Dimmer card connector is not keyed and may be reversed. If card is
reversed, grid lamp will operate at maximum intensity and lamp intensity
will not change.
(a) Mark card and connector to indicate proper connection.
(b) Replace dimmer circuit assembly (paragraph 6-20.8).
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