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 TM 55-1905-220-14-3
Table 3-92. Ship's Course Indicator Troubleshooting (Cont).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
No response.
Step 1.
Inspect for fouled gear train.
Refer to Direct Support Maintenance.
Step 2.
Check for burned out rotary components.
Refer to Direct Support Maintenance.
Step 3.
Check for no power to servomotor.
Refer to Direct Support Maintenance.
4.
Dial of two-speed unit rotates continuously in an increasing direction.
Step 1.
No signal from control transformers to amplifier; anti-stickoff voltage drives servo.
Refer to Direct Support Maintenance.
5.
Dial travels slowly in one direction only.
Step 1.
Amplifier is unbalanced or open circuited.
Refer to General Support Maintenance.
6.
Dial moves sluggishly.
Step 1.
Check for dirt in gear train.
Refer to Direct Support Maintenance.
Step 2.
Damping is excessive.
Adjust damping rheostat. Refer to paragraph 3-218.
Step 3.
Amplifier unbalanced or lacking in gain.
Refer to Direct Support Maintenance.
3-245
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