TM 5-6675-317-14
Table 3-3.
DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
UNEVEN ILLUMINATION.
Check continuity at potentiometer terminals with
multimeter.
With multimeter in place, check map or photo potentiometer
continuity and observe for multimeter deflection reading of 15 ohms.
(a) If this deflection exists, replace map or photo illuminator
potentiometer (paragraph 3-20.5).
(b) If no deflection is observed, replace illuminator controller.
4.
ILLUMINATORS DO NOT BLINK WHEN FOOT SWITCH IS ACTIVATED. Check that foot switch
wiring is correctly connected to terminals and ground in the illumination
control assembly.
(a) Tighten connections.
(b) Change wiring positions on terminals if necessary.
(c) Replace foot switch (paragraph 3-20.4).
3-20. MAINTENANCE PROCEDURES.
a.
This section contains instructions covering direct/general support mainte-
nance functions for the stereo 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
PROCEDURE
Rep
Rep
Rep
ace Transilluminator Lamp . . . . . . . . . . . . . . . . . . . .
Replace Pilot Light . . . . . . . . . . . . . . . . . . . . . . . . .
Replace ON/OFF Switch . . . . . . . . . . . . . . . . . . . . . . . .
Replace Foot Switch . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Illumination Controller Potentiometer(s) . . . . . . . . . .
PARAGRAPH
3-20.1
3-20.2
3-20.3
3-20.4
3-20.5
3-39
