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 1. (Cont) d. (Cont) switch S3. Ensure that switch S3 is on. Set multimeter to ohms. Connect meter leads to S3-1 and 2 (red wires). Note meter indication. Connect meter leads to S3-3 and 4 (black wires). Note meter indication. b. If meter indicates 0 ohms, inspect wiring for broken or loose connections at the following points: fuse F1 to S3-4; S3-3 to T1; T1 to TB3-1 and 2; TB3-1 and 2 to P1-1 and 2; battery red lead to S3-2; S3-1 to Pl-19. c. If wiring connections are good, replace power transformer. (1) To remove transformer, note length and connection points of transformer wires. Disconnect wires. Remove mounting screws and washers. Remove transformer. (2) To install new transformer, cut transformer wires to proper length and install crimp lugs. Position transformer on inner enclosure and install mounting screws and washers. Connect transformer wires. d. Set multimeter to ac volts. Disconnect P1/J1 and connect meter leads to P1-i and P1-2. Turn on switch S3. If voltage is not within tolerance, 68 +7 vac),replace power transformer. If voltage is within tolerance, replace electronics assembly. CAUTION Inner enclosure is heavy. Use caution when removing from outer enclosure. (1) To remove electronics assembly, loosen collar on connector 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 5-12