TM-9-2350-273-BD M60 M48 Battle Damage Assessment and Repair Download
Page 165 of 288
TM 9-2350-273-BD COMMUNICATIONS SYSTEM Detailed Assessment Steps (Cont'd) 3. Make sure the circuit breaker has not been tripped by turning the radio power switch to OFF BREAKER RESET and then back to LOW or HIGH. 4. Make sure the MK-2096 Transient Voltage Suppressor is operational by checking for a red light on the suppressor. If the light is lit, replace or remove the suppressor. 5. Make sure the MK-7777 or MK-7778 Transient Voltage Suppressor is operational by depressing the Battle-Override switch. If the suppressor is bad, replace or repair as necessary. 6. Check the antenna coax cables from the radio to the MX-6707 to make sure they are connected properly. a. If a defective cable is found, follow the procedures listed below: (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, then go to step 7. (3) Repair the cable in accordance with the procedures in para. 11-29. b. If a defective cable is not found, go to step 7. 7. Replace radio with a known operational radio. If the problem no longer exists, then the radio should be replaced or repaired using standard maintenance procedures. 11-10. OBSERVABLE SYMPTOM: THE DISTANT STATION DOES NOT ANSWER RADIO CALLS. Detailed Assessment Steps: 1. Make sure the radio is transmitting by listening for sidetone when transmitting. 2. Make sure the tuning controls on the radio are set on the proper frequency by tuning them to a different frequency and then resetting them on the assigned frequency. 3. Make sure there is sufficient transmitter power to reach the distant station by transmitting on HIGH power and/or repositioning the vehicle with the whip antenna untied. 4. Check radio by attempting to communicate on an alternate frequency. 11-10