TM 11-5840-281-12-1
4-32. ORGANIZATIONAL TROUBLESHOOTING. (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Perform azimuth electronic filter angle volts test indicated in steps a through e.
a.
On receiver-transmitter main power panel, place SCAN switch to OFF position.
b.
On local control monitor, place LOCAUREMOTE switch to RT position and SCAN MODE switch to
NORM position.
c.
Set up multimeter to measure + 50 v.
d.
On azimuth electronic filter, connect negative lead of multimeter to TP701 GRD and connect positive
lead to TP703 ANGLE VOLTS.
WARNING
Be extremely careful when performing step e to avoid being struck by scanning elevation antenna.
e.
On receiver-transmitter main power panel, place SCAN switch to ON position.
If multimeter indication varies as azimuth antenna scans, refer to a higher category of maintenance.
Step 3. Perform the azimuth electronic filter angle data test indicated in steps a through d.
a.
On receiver-transmitter main power panel, place SCAN switch to OFF position.
b.
Set up multimeter to measure - 30 v.
c.
On azimuth electronic filter, connect negative lead of multimeter to TP702 ANGLE DATA and connect
negative lead to TP701 GRD.
WARNING
Be extremely careful when performing step d to avoid being struck by scanning elevation antenna.
d.
On receiver-transmitter main power panel, place SCAN switch to ON position.
If multimeter indication does not vary as azimuth antenna scans, refer to a
higher category of maintenance. If multimeter indication varies between - 9 and
- 18 v, replace azimuth electronic filter (para 4-40) and perform azimuth
electronic filter alinement (para 4-45).
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