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
4. (Cont)
f. (Cont)
h.
Disconnect and then reconnect wire on
TB8-F-1. Meter should indicate more
than 100,000 ohms and then return to
less than 2,000 ohms 10 ‘2 seconds
after wire is reconnected.
i.
If meter does not indicate more than
100,000 ohms with wire disconnected
from TB8-F-1, replace PC boards A8
and A9.
(1) To remove PC boards A8 and A9, turn
off switch S1 on top of power sup-
ply. Place thumb or finger under
board ejector and lift up until
board pops out of receptacle at
back of status processor. Then
grasp PC board and pull straight
out.
(2) To install new PC boards A8 and A9,
turn board so plastic ejector is to-
ward top. Align board with guides
at top and bottom of status pro-
cessor. Slide board straight in un-
til it contacts receptacle at back of
processor. Then press firmly on
board until it seats completely in
receptacle.
(3) Turn on switch S1 on power supply.
Depress TRANSMITTER RESYNC
switch S2. Wait about 5 minutes
for system to stabilize. Turn mode
switch to TEST/RESET and then
to SECURE.
j.
Turn mode switch to SECURE. Set
LATCH/NON-LATCH switch S5 to
LATCH. Set multimeter to ohms and
connect leads to TB6, terminals S1-D
and S1-DR. Meter should indicate less
than 2,000 ohms.
k.
Remove and then reconnect wire on
TB8-F-1. Meter should indicate more
than 100,000 ohms until mode switch
is turned to RESET.
5-72
