TM 11-6625-3087-12
Table 3-1. Troubleshooting--Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. LEVEL METER QUITS DURING OPERATION
Step 1. Perform malfunction No. 1.
Step 2. Allow the Level Meter to cool and then try operating.
If Level Meter operates normally, check air filter. Clean as required.
If Level Meter does not operate, notify next higher level of maintenance.
3. FREQUENCY/ENTRY DISPLAY BLANK.
Step 1. Check to see if the Level Meter is in WIDEBAND mode.
Select another mode.
Step 2. Check to see if an ERROR message is present in the MEASUREMENT/ENTRY display.
If error is present, go to malfunction No. 4.
If error is not present, proceed with step 3.
Step 3. Press AUTO CAL push button.
If no calibration error is displayed, recheck operating instructions (para 2-9).
If calibration error is displayed, notify next higher level of maintenance.
4. ERROR MESSAGE PRESENT IN MEASUREMENT/ENTRY DISPLAY.
Step 1. Check to see if error is listed in table 2-2.
Perform required action as listed.
Step 2. Press MEAS CONT push button.
If error disappears, resume normal operation.
If error remains, notify next higher level of maintenance.
5. FREQUENCY TUNE KNOB WILL NOT CHANGE FREQUENCY.
Step 1. Check to see if AUTO or FREQ STEP push buttons are on.
Select proper push button.
Notify next higher level of maintenance.
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