TM 5-6675-317-14
Table 4-3. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
PILOT LIGHT IS OFF.
Check fuse for continuity with multimeter.
Replace fuse (paragraph 4-10.3).
2. ONE ILLUMINATOR DOES NOT WORK.
Step 1.
Check for 120 V ac at illuminator receptacle input.
(a) If voltage is present, replace receptacle (paragraph 4-20.7).
(b) If voltage is not present, proceed to step 2.
Step 2.
Check for correct voltage range at the potentiometer output
terminals.
(a) With multimeter leads in place, slowly rotate illuminator
knob fully right and fully left. Observe for 0-120 V ac
between fully left position and fully right position. If
correct voltage range is not present, repair or replace
wiring between potentiometer and receptacle.
(b) If correct voltage range is present, proceed to step 3.
4-34.2
