Troubleshooting Procedures

TM 5-6350-264-14&P-10 NAVELEX EE 181-AA-OMI-110/E121 C-9412 T.O. 31S9-2FSS9-1-10 Table 5-2. Troubleshooting Procedures - Continued Trouble Probable cause Corrective action 1. (Cont) d. (Cont) and TB4. Remove screws that se- cure cover, and remove cover. Tag and disconnect wires from TB1. Carefully remove screws that se- cure power supply to side of CU enclosure. Be careful not to drop it inside CU. Note cable clamp under screw near TB4 (bottom front). Support power supply and turn it so wires can be tagged and disconnected fromTB3 on bottom of power supply. (2) To install new power supply, re- move cover, and turn unit so TB3 is accessible. Support power sup- ply, and connect wires to TB3. Turn power supply upright and position it over standoffs on side of CU enclosure. Note that cable clamp goes under screw on bottom front of power supply. Insert screws and tighten to secure power supply. Connect wires to TB1. Replace cover and secure with screws. Connect wires to TB2 and TB4. Position battery outside CU enclosure. Carefully insert battery end first; turn and lower it into bottom of CU enclosure. Con- nect wires to battery terminals. Switch on main circuit breaker. (3) Turn on switch S1 on power sup- ply. Depress TRANSMITTER RESYNC switch S2. Wait about 5 minutes for system to stabilize. Turn mode switch to TEST/RESET and then to SECURE. e. Set multimeter to dc volts and connect positive meter lead to PC board A10, TP1 (brown), and negative lead to chassis (ground). Turn mode switch to SE- CURE and ensure that no alarms are acti- vated. Meter should indicate 18.5 to 21 vdc. 5-20