TM 55-1905-223-24-14
Section IV. UNIT MAINTENANCE TROUBLESHOOTING
2-9. Troubleshooting. Both a symptom index and a troubleshooting table are provided. The symptom index will help
you to locate the information you need for troubleshooting.
SYMPTOM INDEX
Troubleshooting
Procedure
GYRO COMPASS SYSTEM
AUXILIARY GYROCOMPASS OUTPUTS
Loss of all outputs
Item 31
BEARING REPEATER
Does not track gyrocompass
Item 30
Lamps do not dim
Item 29
Lamps not lit
Item 28, 29
CAGED LAMP
Does not light
Item 12
EIGHT-AMP DC FUSE
Continually blows
Item 5
FOLLOWUP ALARM LAMP
Lit
Item 6
GYRO CONTROL AND POWER ASSEMBLY LEVEL METER
Does not change when TILT/AZIMUTH
switch is operated
Item 16
Does not indicate level
Item 15
GYRO MOTOR
Does not come up to full speed
Item 14
Will not start
Item 13
2-8
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