TM-9-2350-273-BD M60 M48 Battle Damage Assessment and Repair Download
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TM 9-2350-273-BD COMMUNICATIONS SYSTEM 11-11. OBSERVABLE SYMPTOM: RADIO DOES NOT WORK IN “NEW” SQUELCH "ON" Detailed Assessment Steps: 1 0 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 OFF. 2. Verify that the distant station is too far away for squelch operation by attempting to communicate with the distant station in the NEW ON squelch position. 3. Make sure the antenna system is properly connected. 4. Make sure the antenna system is properly orientated by untying the whip antenna and/or by repositioning the vehicle. 5. 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 problem still exists, go to step 6. 6. Replace the radio with a known operational 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. 11-12. OBSERVABLE SYMPTOM: THE AUXILIARY RECEIVER IS NOT OPERATING PROPERLY. Detailed Assessment Steps: 1. Verify that the aux receiver is firmly connected to its mount by loosening the receiver. Move the receiver forward. Line up the guide pins and push the aux receiver firmly back into place. Tighten the clamps. 2. Verify that the aux receiver circuit breaker has not been tripped by turning the aux receiver power switch to OFF and then back to ON RESET. 11-12