TM 5-6675-328-14
Table 2-3. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
OPTICAL PLUMMET MOTORS DO NOT OPERATE.
WARNING
Electrical shock hazard. You must stand on rubber matting as a protective measure while performing
these procedures. Death or serious injury could result.
Step 1.
Check for 120 V ac at motor connections by operating the switches on OPC handle.
(a) If voltage is not present, proceed to Step 2.
(b) If voltage is present, replace motor (paragraph 2-20.3).
Step 2.
Disconnect control handle at cannon plug and use an ohmmeter to check for continuity between
terminals by operating the switches on OPC handle.
(a) If continuity exists, proceed to step 3.
(b) If open circuit exists, replace control handle (paragraph 2-10.2).
Step 3.
Check for 120 V ac at terminals B and A of cannon plug.
(a) If no voltage present, repair or replace wiring and connections from power plug.
(b) If voltage is present, replace defective cannon plug or wiring to motor.
2-20. MAINTENANCE PROCEDURES.
a.
This section contains instructions covering direct/general support maintenance functions for the short-range
optical calibrator. 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.
2-66
