TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–130 3–3 TROUBLESHOOTING — CONTINUED j. NBC SYSTEM CIRCUIT — CONTINUED (3) NBC CONTROL BOX ASSEMBLY INDICATOR LIGHT ILLUMINATES, BUT M2A2 AIR PURI- FIER DOES NOT OPERATE. — CONTINUED 1. Reconnect lead 135 to M2A2 air purifier. 2. Place one multimeter lead in socket B and other lead to pin B of J2 connector on NBC control box assembly. 3. Check for continuity. Is continuity present? CONTINUED FROM STEP B C yes no Repair wire 135 of NBC power lead assembly (para 8–9). D yes no Replace J2 connector of NBC control box as- sembly (para 17–4). Repair wire 9 (para 17–4). END OF TASK WIRE 9 1. Turn MASTER and CAB NBC POWER switches to OFF. 2. Disconnect NBC power lead assembly at J2 connector of NBC control box assembly. 3. Place one multimeter lead in wire 135 and other lead to pin B of NBC power lead assembly connector. 4. Check for continuity. Is continuity present? J2 CONNECTOR SOCKET B J2 CONNECTOR PIN B NBC CONTROL BOX ASSEMBLY WIRE 135 + – NBC POWER LEAD ASSEMBLY CONNECTOR PIN B + –