TM 5-6675-323-14
Table 8-3. DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ONE ILLUMINATOR DOES NOT WORK - Cont
(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.
C h e c k for 120 V ac input at potentiometer.
S t e p 3.
(a) If correct voltage is not present, proceed to Step 4.
(b) If correct voltage is present, replace potentiometer
Check wiring for continuity between switch and potentiometer.
S t e p 4.
Repair or replace wiring.
3.
ILLUMINATORS WORK BUT PILOT LIGHT IS OFF.
Check for correct voltage at pilot light leads.
(a) If correct voltage is present, check wiring.
(b) If not present, replace pilot light (paragraph 8-20.2)
8-20. MAINTENANCE PROCEDURES.
a. This section contains instructions covering direct/general support mainte-
nance functions for the zoom transfer scope. Personnel required are listed only if
the task requires more than one.
b . After completing each maintenance procedure, perform operational check to be
sure that equipment is properly functioning.
INDEX
PARAGRAPH
PROCEDURE
Replace
Power
Switch.
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Replace
Pilot
Light
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8-35
