NAVELEX EE 181-AA-OMI-100/E121 DZ-204
Table 5-1. Troubleshooting Procedures - Continued
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.
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.
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.
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.
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