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)
f.
(Cont)
b.
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.
g.
Defective
a.
Ensure that power switch S1 in Control Unit is
power trans-
turned off. Slide inner enclosure part way out.
former T1.
Remove screws that secure switch bracket.
Lower switch bracket to gain access to terminal
on 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 bro-
ken 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-l and 2; battery red lead to
S3-2; S3-1 to P1-19.
c.
If wiring connections are good, replace power trans-
former.
(1) To remove transformer, note length and con-
nection points of transformer wires. Discon-
nect wires. 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. Con-
nect transformer wires.
h.
Defective
a.
Interrupt ac power from Control Unit. Set multi-
battery.
meter to dc volts. Connect positive meter lead
to red battery terminal and negative meter lead
to black battery terminal. Ensure that power
switch S3 is set to POWER ON. Meter should in-
dicate 26 vdc or more.
5-24
