TM-9-2350-275-BD Battlefield Damage Assessment and Repair for M113 Family Download
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TM 9-2350-275-BD COMMUNICATIONS SYSTEM 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. Check 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. Check 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. 11-35. (3) Repair the cable in accordance with the procedures in para. 11-30. b. If a defective cable is not found, then follow 10. 10. Replace the radio with a known operational radio. the procedures Operate radio. a. If communication has been restored, repair the radio in standard maintenance procedures. indicated in step accordance with b. If the problem still exists, refer to the troubleshooting procedures in TM 11- 5820-401-12. 11-11. OBSERVABLE SYMPTOM: RADIO DOES NOT WORK IN “NEW SQUELCH “ON” Detailed Assessment Steps 1. Verify that the distant station is transmitting with the squelch switch in the NEW ON position by setting your squelch to NEW OFF and telling the distant station to place his squelch in NEW ON. 11-11