TM 1-1520-238-T-7 11–317 11–78. LONG ACTUATOR NO-GO – APPEARS ON HOD 11–78 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 1-1520-238-23 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – R295 door open 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. Check for 1800 to 2200 ohms between P688–49 and P688–50. Is resistance present? YES Go to step 3. NO Go to step 2. 2. Check for open between: P220–4 and P688–49, P220–5 and P688–50. Does open exist? YES Repair open wire. Go to paragraph 11–23. NO Replace longitudinal servocylinder (TM 1-1520-238-23). 3. Check for 90 to 100 ohms between: (ACA) P683–109 and P493–B9. (ACB) P683–109 and ground. Is resistance present? YES Go to step 5. NO Go to step 4. 4. Check for open between: P683–109 and P220–2. (ACA) P493–B9 and P220–9. (ACB) P220–9 and ground. Does open exist? YES Repair open wire. Go to paragraph 11–23. NO Replace longitudinal servocylinder (TM 1-1520-238-23). 5. Check for 90 to 100 ohms between P683–101 and P683–102. Is resistance present? YES Go to step 7. NO Go to step 6. 6. Check for open between: P683–101 and P220–11, P683–102 and P220–10. Does open exist? YES Repair open wire. Go to paragraph 11–23. NO Replace longitudinal servocylinder (TM 1-1520-238-23). 7. Check for 364 to 424 ohms between P688–23 and P688–24. Is resistance present? YES Go to step 9. NO Go to step 8.