4-32. ORGANIZATIONAL TROUBLESHOOTING. (CONT)
TEST OR INSPECTION
Be extremely careful when performing step d to avoid being struck by scanning elevation antenna.
On receiver-transmitter main power panel, place SCAN switch to ON position.
If multimeter indication does not vary as elevation antenna scans, refer to a higher category of
maintenance. If multimeter indication varies between - 9 and - 18 v, replace elevation electronic filter (para
Azimuth antenna will not scan in any mode.
Check fuse F105 on receiver side of receiver-transmitter.
If fuse is blown, momentarily turn off power and replace fuse (para 3-8). If fuse
is not blown, or if new fuse blows after replacement, refer to a higher category of
Azimuth antenna scans erratically in any mode.
Perform azimuth antenna scan adjustment (paro 4-46).
If azimuth antenna scan adjustment does not correct problem, refer to a higher
category of maintenance.
Radar and IFF video not synchronized on both control-indicators at any range in SEARCH and SIMULT modes.
Perform IFF antenna orientation alinement. Refer to TM 11-5895-468-12.
If IFF antenna orientation alinement does not correct problem, IFF synchro data
is missing or incomplete. Refer to higher category of maintenance.