TM 1-1520-238-T-7 11–246 11–30. ASE DC CIRCUIT BREAKER – DOES NOT STAY CLOSED 11–30 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Extractor, Relay CTJ-RO6 Personnel Required: 68X Armament/Electrical Systems Repairer References: TM 1-1520-238-T-6 TM 1-1520-238-23 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. Open ASE DC circuit breaker. Check for short between P1–34 and ground. Does short exist? YES Refer to TM 1-1520-238-T-6 to troubleshoot circuit protection system (dc essential bus 3 – pilot station). NO Go to step 2. 2. Check for short between P441–B1 and ground. Does short exist? YES Go to step 3. NO Go to step 4. 3. Check for short between (A137)J1–A10 and ground. Does short exist? YES Replace pilot ASE panel (TM 1-1520-238-23). NO Repair shorted wire between P441–B1 and P170–A10. Go to paragraph 11–23. 4. Detach P431 and P441. Check for short between (A402)J1–34 and ground. Does short exist? YES Go to step 6. NO Go to step 5. 5. Detach P682. Check for short between P431–B1 and ground. Does short exist? YES Repair shorted wire between: P682 SP5 and P682–75, P682 SP5 and P682–121, P682 SP5 and P682–73, P682 SP5 and P682–79, P682 SP5 and P682–77, P431–B1 and P682 SP5. Go to paragraph 11–23. NO (ACA) Replace DASEC (TM 1-1520-238-23). (ACB) Go to step 7. 6. Check for short between (A402): Wire end K4–1/2–B3 and ground, wire end K4–1/2–B2 and ground. Does short exist? YES Repair shorted wire between (A402): TB2–7–D and J1–34, TB2–7–G and J24–B1, TB2–7–A and J27–B1, TB2–7–K and K4–1/2–B3, J27–B4 and K4–1/2–B2. Go to paragraph 11–23. NO Replace relay XK4–1/2 (TM 1-1520-238-23). 7. (ACB) Attach P682. Detach filter adapter A705. Check for short between P431–B1 and ground. Does short exist? YES Replace filter adapter (TM 1-1520-238-23). NO Replace DASEC (TM 1-1520-238-23). END OF TASK