TM 55-1905-223-24-14
Table 2-3. Unit Maintenance Troubleshooting - CONT
Malfunction
Test or Inspection
Corrective Action
GYRO COMPASS SYSTEM - Continued
31.
Loss of all auxiliary gyro compass outputs; direction finder, omega receiver, 3CM radar, 1OCM radar, auto pilot
and all bearing repeater lamps not lit and repeaters inoperative.
STEP 1.
Check to see if relay transmitter is defective.
Replace relay transmitter (para. 2-16).
MAGNETIC COMPASS SYSTEM
1.
Binnacle hood lamp not lit.
STEP 1.
Check to see if input power 24 Vdc from pilothouse dc panel is defective.
a.
Check dc panel circuit breaker No. 1F. Reset.
b.
If hood lamp does not light, replace lamp (para. 2-28a.).
c.
If hood lamp still does not light, internal wiring is defective.
Replace binnacle (para. 2-27).
2.
Magnetic compass erratic.
STEP 1.
Check for defective compass (needles sluggish or not moving).
Replace magnetic compass (para. 2-27).
STEP 2.
Check for low fluid level.
Replace/add compass fluid (para. 2-28).
3.
Bubbles in magnetic compass.
STEP 1.
Check for loss of compass fluid.
Replace compass fluid (para. 2-28).
2-15
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