TM 5-6350-264-14&P-10
NAVELEX EE 181-AA-OMI-110/E121 C-9412
T.O. 31S9-2FSS9-1-10
Table 5-2. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective action
6.
(Cont)
Improper
(3) Turn on switch S1 on power sup-
operation of
ply. Depress TRANSMITTER
audible signal
RESYNC switch S2. Wait
device. (Cont)
about 5 minutes for system to
stabilize. Turn mode switch
to TEST/RESET and then to
SECURE.
h.
Turn mode switch to TEST/RESET.
Press and release CU TAS. Audible
signal device should sound. Turn
mode switch to ACCESS and then
to TEST/RESET. Audible signal
device should continue to sound
for 10 ±2 seconds, and then stop.
i.
If audible signal device still does not per-
form properly, turn off switch S1
on power supply. Remove PC
boards A8 and-A9. Set multimeter
to ohms and connect leads to the
following points:
TB3-3 to audible signal device
positive terminal;
TB3-4 to audible signal device
negative terminal;
TB3-3 to mode switch,
terminal 2-2;
TB3-4 to J12/P1 pin 38;
J12/P1 pin 38 to J8-13;
J8-14 to J9-R.
Meter should indicate 0 ohms.
j.
If meter does not indicate 0 ohms at any
point, inspect wires for broken or
loose connections. Resolder any
bad connections.
NOTE
If Data Transmitter is installed,
it must be removed to reach
TB8-F through TB13-E. Re-
move screws that secure trans-
mitter and carefully move it
aside. Reinstall transmitter
after tests.
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