| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-219-14-11
5-117. SHIP'S COURSE INDICATOR - MAINTENANCE INSTRUCTIONS (Continued).
Troubleshooting Procedures for Fault Isolation
Symptom
Probable cause
Verification and Remedy
Dial of two-speed
No signal from
Check synchro circuits for
unit rotates
control trans-
signal transmission from
continuously in
formers to amp-
external transmitters
an increasing
lifier; anti-
through to control trans-
direction
stickoff voltage
formers in indicator.
drives servo.
Dial travels
Amplifier is un-
Check amplifier circuits
slowly in one
balanced or open
with attention to symmetry.
direction only
circuited.
Dial moves sluggishly
Dirt in gear
Inspect and clean gear train
train
(paragraph c(3)).
Darmping is
Adjust darmping rheostat as
excessive
in step 4.
Amplifier is
Check amplifier circuits.
unbalanced or
lacking in gain
Dial of two-speed
No signal from
Check 1X sychro.
indicator moves
1X.
alternately fast
and slow and may
lock occasionally
1X and'36X
Readjust anti-stickoff
synchros not
positions of synchros (step
set at proper
4).
electrical
position
5-1316
|
||
|
||
