TM-9-2350-273-BD M60 M48 Battle Damage Assessment and Repair Download
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TM 9-2350-273-BD COMMUNICATIONS SYSTEM Detailed Assessment Steps (Cont'd) a. If communications are adequate on the alternate frequency, go to step 6. b. If there are no communications on the alternate frequency, go to step 5. 5. Check the transmitter for normal operation by attempting to communicate with another nearby station. a. If there is no output or if the output is low, then go to step 10. b. If the output power is within acceptable limits, go to step 6. 6. Ensure the antenna tuning circuits located in the antenna matching unit by having someone listen for the sound of relays operating when the frequency is changed. a. If the sound of relays operating is not heard, manually tune the MX-6707 to the proper frequency. b. If the sound of relays operating is heard, then go to step 7. 7. Make sure the antenna elements are tightly screwed together by turning off the transmitter and retightening the antenna sections. 8. Ensure that the antenna coax cable connectors are tight. 9. Inspect the coax cable for breaks or torn insulation. a. If a defective cable is found, follow these procedures: (1) Replace the defective cable in accordance with standard repair procedures. (2) Replace the defective cable with an acceptable replacement cable listed in para 11-34. (3) Repair the cable in accordance with the procedures in para. 11-29. b. If a defective cable is not found, then follow the procedures indicated in step 10. 10. Replace the radio with a known operational radio. Operate radio. a. If communication has been restored, repair the radio in accordance with standard maintenance procedures. b. If the problem still exists, refer to the troubleshooting procedures in TM 11-5820-401-12. 11-11