TM 11-6625-3087-12
Table 3-1. Troubleshooting-Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. AUDIO NOT OPERATIVE.
Step 1. Verify in LO DIST, LO NOISE, or NOISE/DEMOD measurement modes.
Make proper selection.
Step 2. Check to see if the audio volume knob is fully CCW.
Increase volume (CW).
Step 3. Perform operational test (para 3-7).
If audio present at end of test, recheck operating instructions.
If audio is missing or weak, notify next higher level of maintenance.
7. LEVEL METER WILL NOT MEASURE INPUT SIGNAL.
Step 1. Check to see if the unit under test is on.
Apply power.
Step 2. Press AUTO CAL push button.
If calibration error is displayed, notify next higher level of maintenance.
If no calibration error is displayed, proceed with step 3.
Step 3. Perform operational test (para 3-7).
If test passes, recheck operating instructions (para 2-9).
If test fails, notify next higher level of maintenance.
8. OVLD INDICATOR FLASHING.
Step 1. Check full scale setting on Level Meter.
Select AUTO or increase full scale setting.
Step 2. Check amplitude of input signal.
Decrease amplitude until indicator goes out.
Notify next higher level of maintenance.
9. OL/UL IN MEASUREMENT/ENTRY DISPLAY.
Step 1. Check amplitude of input signal.
Adjust amplitude until indicator goes out.
Step 2. Press AUTO CAL push button.
If no calibration error is displayed, recheck operating instructions.
If calibration error is displayed, notify next higher level of maintenance.
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