TM 55-1905-223-24-14
Table 2-3. Unit Maintenance Troubleshooting - CONT
Malfunction
Test or Inspection
Corrective Action
GYRO COMPASS SYSTEM - Continued
19.
Compass slews erratically when uncaged; level meter erratic.
STEP 1.
Check to see if gyro compass is defective.
Replace gyro compass (para. 2-12).
20.
Relay transmitter POWER lamp not lit when POWER switch is ON.
STEP 1.
Check to see if fuse F1 is defective.
Replace fuse F1 (para. 2-17).
STEP 2.
Check to see if POWER lamp is defective.
a.
Replace POWER lamp (para. 2-17).
b.
If FUSE F1 and POWER lamp are good, check pilothouse IC/ELEX panel circuit breaker No. 1. Reset.
STEP 3.
Check cable EP103-4 for security and condition.
Replace cable. Refer to TM 55-1905-223-24-18.
21.
Relay transmitter POWER lamp not lit when POWER switch is ON; FUSE F1 good, POWER lamp good, input
power good.
STEP 1.
Check to see if relay transmitter is defective.
Replace relay transmitter (para. 2-16).
22.
Open scale repeater does not track gyro compass.
STEP 1.
Check to see if bulkhead mounting bracket power switch is OFF.
On bulkhead mounting bracket, set power switch (under cover) to ON position.
STEP 2.
Check to see if open scale repeater is defective.
Replace open scale repeater (para. 2-18).
23.
Open scale repeater lamp(s) not lit.
STEP 1.
Check to see if bulkhead mounting bracket power switch is OFF.
On bulkhead mounting bracket, set power switch (under cover) to ON position.
STEP 2.
Check to see if open scale repeater lamps are defective.
Replace open scale repeater lamp(s) (para. 2-19).
2-13
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