TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 446 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED af. VENTILATED FACE PIECE SYSTEM CIRCUIT — (2) AIR PURIFIER FAILS TO OPERATE; HEATERS CONTINUED OPERATE PROPERLY TOOIS General mechanic’s tool kit (item 64, Appx H) Multimeter (item 36, Appx H) TA-1 probe kit (item 43, Appx H) A 1. Disconnect lead 439A from air purifier. 2. Place red lead of muitimeter in lead 439A and black lead to ground. 3. Turn MASTER and NBC switches ON and check for voltage. 4. Turn MASTER and NBC switches OFF. Is voltage present? I I I Repair or replace lead 439A of ventilated face piece system harness I I (para 8-62). I I 1. Reconnect lead 439A to air purifier. I 2. Disconnect ground lead from air purifier. 3. Place red lead of multimeter on ground lead I and black lead to ground. 4. Check for continuity. II s continuity present? I I . Replace air purifier ground lead (para 12-1). I Replace air purifier (para 12-1). END OF TASK B 3-346