TM 5-6350-264-14&P-9NAVELEX EE 181-AA-OMI-100/E121 DZ-204T.O. 31S9-2FSS9-1-9Table 5-1. Troubleshooting Procedures - ContinuedTroubleProbable causeCorrective action1. (Cont)d. (Cont)switch S3. Ensure that switch S3 is on. Set multimeter toohms. Connect meter leads to S3-1 and 2 (red wires). Notemeter indication. Connect meter leads to S3-3 and 4 (blackwires). Note meter indication.b.If meter indicates 0 ohms, inspect wiring for broken or looseconnections at the following points: fuse F1 to S3-4; S3-3 toT1; T1 to TB3-1 and 2; TB3-1 and 2 to P1-1 and 2; batteryred 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 connectionpoints of transformer wires. Disconnect wires. Removemounting screws and washers. Remove transformer.(2) To install new transformer, cut transformer wires toproper length and install crimp lugs. Position transformeron inner enclosure and install mounting screws andwashers. Connect transformer wires.d.Set multimeter to ac volts. Disconnect P1/J1 and connectmeter leads to P1-i and P1-2. Turn on switch S3. If voltageis not within tolerance, 68 +7 vac),replace power transformer.If voltage is within tolerance, replace electronics assembly.CAUTIONInner enclosure is heavy. Use caution when removingfrom outer enclosure.(1) To remove electronics assembly, loosen collar onconnector P2. Turn metal tab 90 degrees anddisconnect P2 from J2. Tag and disconnect wires thatrun from terminal boards to conduit. Slide the inner5-12
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