Table 3-3. DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. UNEVEN TRANSILLUMINATION.
CAUTION
Use cotton gloves when working on transilluminator assemblies. Damage to
equipment may occur.
Step 1.
Remove covers and check that both lamps are lighted in each
transilluminator.
(a) If lamps are not defective, proceed to step 2.
(b) If lamps are defective, replace as necessary (paragraph
3-20.1).
CAUTION
Be sure that the equipment is unplugged before making continuity checks or
damage to meter may result.
Step 2.
Check continuity at potentiometer terminals with multimeter. With
multimeter in place, slowly rotate transilluminator knob fully right
and then fully left.
Observe for multimeter deflection reading of
15 ohms.
(a) If this condition exists, replace transillumination
potentiometer (paragraph 3-20.5).
(b) If no deflection is observed, replace illuminator controller.
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