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
1.
(Cont)
d.
(Cont)
(3) 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/RE-
SET and then to SECURE.
q.
If meter indicates 20 + 1 vdc at S3, ter-
minal 2-1, replace PC board A10.
(1) To remove PC board A10, turn off
switch S1 on top of power supply.
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 board A10, turn
board so plastic ejector is toward
top. Align board with guides at
top and bottom of status proces-
sor. Slide board straight in until
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 sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait about
5 minutes for system to stabilize.
Turn mode switch to TEST/RE-
SET and then to SECURE.
e.
Bad alarm
a.
Tag, remove, and isolate any wires or
identification
jumpers from TB6, terminals S1-I, S1-IR,
circuitry.
S1-D, and S1-DR to Data Transmitter or
Monitor Cabinet. Ensure that no LED’s
are lighted. Set multimeter to dc volts
and connect negative lead to chassis
(ground). Connect positive lead to TP1
(brown), and then to TP2 (red), on each
PC board, A1, A2, A3, A4, A5, A6, and
A7. A meter indication of 18.5 to 21 vdc
on either test point on any of these PC
boards indicates an alarm condition. Less
than 0.5 vdc indicates a non-alarm con-
dition.
5-25
