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) c. (Cont) f. Turn on switch S1 on power supply. De- press TRANSMITTER RESYNC switch 82. Wait about 5 minutes for system to stabilize. During 5-minute stabilization period, check power supply. Set multi- meter to dc volts and connect negative lead to chassis (ground). Connect posi- tive lead to power supply, TB2-3. Meter should indicate 20 +1 vdc. Connect posi- tive lead to TB2-5. Meter should indicate 5 +0.25 vdc. Connect positive lead to TB2-2. Meter should indicate 28 +2 vdc. Turn mode switch to TEST/RESET and then to SECURE. d. Incorrect sup- a. Set multimeter to dc volts and connect ply voltage positive meter lead to PC board A10, or bad tamper TP1 (brown), and negative lead to chas- circuitry. sis (ground). Turn mode switch to SE- CURE and ensure that no alarms are acti- vated. Meter should indicate 18.5 to 21 vdc. b. If meter indicates less than 1 vdc, turn mode switch to ACCESS. Connect posi- tive meter lead to power supply TB2-3. Meter should indicate 20 + 1 vdc. Connect positive meter lead to TB2-5. Meter ,should indicate 5 +0.25 vdc. Connect positive meter lead to TB2-2. Meter should indicate 28 +2 vdc. c. If any of these indications are not cor- rect, turn off switch S1 on power supply. Check wiring for poor or loose connec- tions, broken wires, or frayed insulation. Repair or replace any bad wiring. d. If wiring is good, replace power supply. (1) To remove power supply, pull main circuit breaker to remove 120 vac from CU. Disconnect wires from battery. As battery is heavy, lift and turn it to remove from bottom of CU enclosure. Tag and disconnect wires from TB2 5-19