Troubleshooting Procedures

TM 5-6350-264-14&P-9 NAVELEX EE 181-AA-OMI-100/E121 DZ-204 T.O. 31S9-2FSS9-1-9 Table 5-1. Troubleshooting Procedures - Continued Trouble Probable cause Corrective action 2. (Cont) e. (Cont) into outer enclosure. Route wires through hole in rear of inner enclosure. Connect wires that run from terminal boards to con- duits. Align notch on P2 with J2 and con- nect P2 to J2. Lock metal tabs together and tighten collar on connector P2. f. Poor ground Set multimeter to ohms. Connect meter leads to each of connections. the following points: TB2-2 to outer enclosure; TB2-2 to TB3-3; TB2-2 to P1-3, 4, 16, 17; TB2-2 to battery negative lead. If the multimeter indicates more than 0 ohms at any of the above points, inspect wiring for broken or loose connections, inspect plugs for bent or broken pins, and inspect conduit for poor connections. 3. No alarms. a. Shorted or bro- a. Set multimeter to dc volts. Connect positive meter ken wires, lead to TB1-2 and negative meter lead to TB2-2. loose con- Ensure that an alarm condition is being presented nections, or by the Control Unit. bent pins. b. If meter indicates 5 +0.5 vdc, turn power switch S3 to POWER OFF. Inspect wiring and Pi/J1 for shorts, frayed wires, bent pins, or foreign materi- al. P1-12, 13, and 24 carries 5 vdc, which is shorted to P1-25 will not allow an alarm to be re- ceived by the Audible Alarm. c. Set multimeter to ac volts. Connect leads to P1-9 and P1-23. If meter indicates 12 +2 vac, inspect wiring from P1 to TB3 and T2 for broken wires, loose connections, or bent pins. d. Connect meter leads to TB3-6 and TB3-7. If meter indicates 18 ±2 vac, inspect wiring from T2 to TB3 and speaker DS1. 5-20