TM 1-1520-238-T-6 9–740 9–390. CPG MISSILE INDICATOR – IS NOT LIGHTED WITH MSL SWITCH IN ON 9–390 POSITION 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 TM 9-1230-476-20-2 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – R90 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. On pilot forward circuit breaker panel, check that MISSION ARMS CONTR circuit breaker (CB46) is open. Check for 28 VDC between P699-121 and P699-114. Is voltage present? YES Go to step 2. NO Go to step 4. 2. Check for 28 VDC between P19-35 and ground. Is voltage present? YES Go to paragraph 9–331 to troubleshoot CPG caution/ warning indicators. NO Go to step 3. 3. Check for open between P699-69 and P19-35. Does open exist? YES Repair open wire between: P699-69 and J416-A2, P416-A2 and P19-35. Go to paragraph 9–364. NO Refer to TM 9-1230-476-20-2 to troubleshoot MRTU. 4. On CPG circuit breaker panel 1, open MUX CPG circuit breaker (CB15). On pilot ELEC PWR panel, set BATT/EXT PWR switch to OFF. Check for open between P699-114 and ground. Does open exist? YES Repair open wire. Go to paragraph 9–364. NO Go to step 6. 5. Check for 28 VDC (A77)J2-7. Is voltage present? YES Go to step 5. NO Go to paragraph 9–249 to troubleshoot circuit protection system (dc essential bus 3 – CPG station). 6. Check for open between P419-B11 and P699-121. Does open exist? YES Repair open wire between P699-121 and J523-A10, P523-A10 and P419-B11. Go to paragraph 9–364. NO Go to step 7. 7. Check for open between (A402)J13-B11 and (A402)XK1-3-A3. Does open exist? YES Repair open wire. Go to paragraph 9–364. NO Go to step 8.