TM 11-5840-281-12-1
SYMPTOM INDEX (CONT)
No vertical deflection on elevation and azimuth displays of either .................................................
control-indicator ............................................................................................................... *
No vertical deflection on azimuth display of either control-indicator .............................................. 4-112
No vertical deflection on elevation display of either control-indicator ............................................ 4-114
Displaced centering on any or all scan mode displays on either control-
indicator ........................................................................................................................... *
No azimuth or elevation cursor on crt of either control-indicator in
NORM, 35EL, or 60AZ mode ........................................................................................... *
Azimuth antenna will not scan in any mode .................................................................................. 4-115
Azimuth antenna scans erratically ................................................................................................ 4-115
Azimuth antenna will not scan in all precision modes (NORM, 350EL, and
60AZ) ............................................................................................................................. *
Azimuth antenna scans wrong sector in NORM, 350EL, or 600AZ mode ...................................... *
Elevation antenna will not scan in any mode ................................................................................ *
Elevation antenna will not switch between 10-degree elevation scan and
35-degree elevation scan.................................................................................................. *
Elevation and azimuth antennas will not scan in any mode .......................................................... *
Azimuth antenna will not tilt up or down......................................................................................... *
Elevation antenna will not servo right or left ................................................................................. *
PART 2
Radar and IFF video not synchronized on both control-indicators at any
range in SEARCH and SIMULT modes............................................................................. 4-115
Intensified dot but not timebase sweep on crt of both control-indicators
in Search and SIMULT modes .......................................................................................... 4-116
No timebase sweep on either control-indicator in IFF mode .......................................................... 4-116
Timebase sweep on both control-indicators will not rotate in IFF mode ........................................ 4-116
*If this symptom is observed, report the problem to a higher category of maintenance.
4-32. TROUBLESHOOTING PROCEDURES.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Radar set does not operate when MAIN POWER switch on receiver-transmitter main power panel Is placed to
ON position.
Step 1.
Check that primary power source is turned on.
Turn on primary power source.
Step 2.
Check cables W3007, W3003, and W3004 for defective connections.
Tighten loose connections.
4-106
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