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
should indicate 28 ±2 vdc. Turn
identification
mode switch to TEST/RESET
circuitry.
and then to SECURE.
(Cont)
g.
Connect negative meter lead to chassis
and positive meter lead to TP1 on
each PC board, Al through A6. If
voltage at TP1 on any PC board is
18.5 to 21 vdc, then the same vol-
tage should be present on associated
A12 pin. Terminals on J11 are
associated with PC boards as
follows:
J11
A12
CARD NO.
PIN NO.
PIN NO.
A1-TP1 to J1-6 to J11-16 to A12-F
A2-TP1 to J2-6 to J11-18 to A12-A
A3-TP1 to J3-6 to J11-14 to A12-B
A4-TP1 to J4-6 to J11-12 to A12-C
A5-TP1 to J5-6 to J11-4 to A12-D
A6-TP1 to J6-6 to J11-2 to A12-E
If voltage is not present on A12, turn
off switch S1 on power supply. Re-
move PC board A11.
(1) To remove PC board A11, turn off
switch S1 on top of power sup-
ply. Place thumb or finger un-
der board ejector on A11 and
lift up until board pops out of
receptacle at back of status pro-
cessor. Then grasp PC board and
pull straight out.
(2) 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.
5-104
