TM 11-6660-200-14
5-4.
GENERAL. (CONT)
When working on any problem, be sure to report your work on the forms prescribed by DA Pam 738-750.
First check the symptom index for symptom, then check the troubleshooting table for possible solution or corrective action.
SYMPTOM INDEX
Page
Vane tail of transmitter does not respond or responds slowly to changes
in wind direction..................................................................................................................
Vane tail of transmitter responds to wind direction change, but indicator
pointer remains stationary ..................................................................................................
Wind direction indicator pointer either spins or oscillates excessively .......................................
Wind direction indicator pointer points 180 degrees from correct direction ...............................
Wind measuring set emits rf interference ..................................................................................
Windspeed indicator shows erratic or no readings, all other functions
normal ................................................................................................................................
Windspeed indicator shows lower reading than actual windspeed ............................................
DIRECT SUPPORT AND GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Vane tail of transmitter does not respond or responds slowly to changes in wind direction.
Slowly turn transmitter and check for excessive friction.
a.
Replace transmitter synchro (para 5-21).
b.
Refer to higher category of maintenance
2. Vane tail of transmitter responds to wind direction change, but indicator remains stationary.
Remove transmitter synchro (para 5-21).
a.
Check for binding
b.
Refer to higher category of maintenance
3. Wind direction indicator pointer points 180 degrees from correct direction.
Check for reversed wires at transmitter synchro.
Correct wiring on synchro. (See FO-2).
5-2
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