TM 1-1520-238-T-6 9–228 Change 8 9–52. 115 VAC IS NOT PRESENT – FROM AC ELEC UTIL PWR CIRCUIT BREAKER (CB6) 9–52 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer One person to assist References: TM 1-1520-238-T-7 TM 1-1520-238-23 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – R295 door opened WARNING Turn off power before detaching or attaching wires and connectors. High current 28 VDC or 115 VAC is present. Failure to do so could result in death or serious injury. 1. With power applied, and on ground service utility receptacle circuit breaker panel, check that AC ELEC UTIL PWR circuit breaker (CB6) is closed. Does AC ELEC UTIL PWR circuit breaker (CB6) stay closed? YES Go to step 3. NO Go to step 2. 2. Open AC ELEC UTIL PWR circuit breaker (CB6). Check for short between: J16-B and ground, J16-F and ground, J16-E and ground. Does short exist? YES Repair shorted wire. Go to paragraph 9–47. NO Replace AC ELEC UTIL PWR circuit breaker (TM 1-1520-238-23). 3. Check for open between: CB6-A2 and J16-E, CB6-B2 and J16-F, CB6-C2 and J16-B. Does open exist? YES Repair open wire. Go to paragraph 9–47. NO Go to step 4. 4. With AC ELEC UTIL PWR circuit breaker (CB6) closed, check for continuity (less than 1 ohm) between: CB6-A1 and CB6-A2, CB6-B1 and CB6-B2, CB6-C1 and CB6-C2. Does continuity exist? YES Go to step 5. NO Replace AC ELEC UTIL PWR circuit breaker (TM 1-1520-238-23). 5. Check for open between: (A402)XK1-A1 and CB6-A1, (A402)XK1-B1 and CB6-B1, (A402)XK1-C1 and CB6-C1. Does open exist? YES Repair open wire. Go to paragraph 9–47. NO Go to paragraph 9–12 to troubleshoot ac electrical power generation. END OF TASK