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
8.
(Cont)
Bad alarm
(4) To install new status processor,
identification
position it under standoffs
circuitry.
in top of CU. Insert screws
(Cont)
and tighten to secure status
processor. Insert plug P1 into
connector on bottom of pro-
cessor, and push up. Tighten
screws to secure plug P1.
Position Data Transmitter
over standoffs in CU and in-
sert screws. Tighten screws to
secure Transmitter. Connect
wires to TB6 and TB7 in CU.
(5) Turn on switch S1 on power sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait
about 5 minutes for system to
stabilize. Turn mode switch to
TEST/RESET and then to
SECURE.
j.
Remove PC board A12. Set multimeter
to ohms. Connect negative lead to
chassis. Connect positive lead to
whichever gold pin on board A11
is associated with PC board where
18.5 to 21 vdc was present on TP1.
Meter should indicate 1,500 to
3,000 ohms after alarm ceases.
Turn mode switch to TEST/RESET
and then SECURE. After expira-
tion of time delay period, meter
should indicate more than 100,000
ohms. If indications are correct,
replace A12. If indications are
not correct, replace A11.
(1) To remove PC boards A11 and
A12, turn off switch S1 on
top of power supply. Place
thumb or finger under board
ejector on A11 and lift up un-
til board pops out of recepta-
cle at back of status processor.
Then grasp PC board and pull
straight out. Carefully pull A11
and A12 apart.
5-107
