TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–106 3–3 TROUBLESHOOTING — CONTINUED i. INTERCOMMUNICATION SYSTEM — CONTINUED (2) AMPLIFIER AM1780/VRC DOES NOT KEY WHEN MIC BUTTON IS PUSHED. INITIAL SETUP Tools Artillery and turret mechanic’s tool kit (SC 5180–95–CL–A12) Equipment Condition Vehicle MASTER switch to OFF (TM 9–2350–311–10) Amplifier AM 1780/VRC POWER switch to OFF (TM 9–2350–311–10) 1. Disconnect cable CX4723 from J506 connector at amplifier AM 1780/VRC. 2. Turn MASTER and amplifier AM 1780/VRC POWER switches to ON. 3. Place a jumper wire in socket H and socket A of J506 connector. 4. Repeat steps 1. through 3. for connectors J507, J505, J510, and J504. Is a clicking noise heard in amplifier AM 1780/VRC for each test? yes no A Replace amplifier AM 1780/VRC (para 8–16). Troubleshoot faulty control box circuit (para 3–3i.). END OF TASK J507 J506 J505 J504 J510 AMPLIFIER AM 1780/VRC J506, J507, J505, J510, OR J504 CONNECTOR