TM 11-5840-281-12-1
4-32. ORGANIZATIONAL TROUBLESHOOTING. (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11.
No vertical deflection on elevation display of either control-indicator.
Step 1.
Place ANGLE VOLTS switch on pulse generator to EL position and rotate ART ANGLE V control
clockwise and counterclockwise.
If artificial sweep on elevation display does not move up and down, refer to a
higher category of maintenance.
Step 2.
Perform elevation 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 elevation 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 elevation antenna scans, refer to a higher
category of maintenance.
Step 3.
Perform elevation 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 electronic filter connect negative lead of multimeter to TP702 ANGLE DATA and connect negative
lead to TP701 GRD.
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