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 3. (Cont) b. Defective a. Set multimeter to dc volts. Connect positive electronics meter lead to TB2-3 and negative meter lead to assembly. TB2-2. b. If meter indicates 5 +0.5 vdc, replace the elec- tronics assembly. CAUTION Inner enclosure is heavy. Use caution when removing from outer enclosure. (1) To remove electronics assembly, loosen collar on connect P2. Turn metal tab 90 degrees and disconnect P2 from J2. Tag and disconnect wires that run from terminal boards to conduit. Slide the inner enclo- sure out of the outer enclosure. Place inner enclosure on bench. Remove screws, lock washers, and washers and disconnect connector J1 from P1. Remove electron- ics assembly mounting screws from rear of inner enclosure. Remove electronics assembly. (2) To install new electronics assembly, position assembly on inner enclosure. Install mount- ing screws through rear of inner enclosure. Connect J1 to P1 and install screws, lock washers, and washers. Slide inner enclosure 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 to J2. Lock metal tabs together and tighten collar on con- nector P2. c. Set multimeter to ac volts. Connect leads to P1-9 and P1-23. d. If meter indicates less than 1 vac, replace electro- nics assembly. 5-21