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
(1) To remove PC board A12, turn off
identification
switch S1 on top of power sup-
circuitry.
ply. Place thumb or finger un-
(Cont)
der board ejector on A11 and
lift up until board pops out of
receptacle at back of status
processor. Then grasp PC board
and pull straight out. Carefully
pull A11 and A12 apart.
(2) To install new PC board A12, align
sockets on A12 with pins on
A11. Carefully press board to-
gether until pins are fully en-
gaged in sockets. Ensure that
pins on A11 are not bent or
otherwise damaged. Turn PC
board A11 so plastic ejector is
toward top. Align board with
guides at top and bottom of
status processor. Slide board
straight in until it contacts re-
ceptacle at back of processor.
Then press firmly on board
until it seats completely in re-
ceptacle on P1.
e.
If meter indicates 0 volts on bottom pin,
remove PC board A11 and connect
positive meter lead to J11-17.
(1) If meter indicates 0 volts, turn off
switch S1 on power supply.
Set meter to ohms and connect
leads to power supply TB2-3
and J12/P1 pin 36, and then to
J12/P1 pin 36 and J11-17.
Meter should indicate 0 ohms.
(2) If meter does not indicate 0 ohms,
inspect wires for broken or
loose connections. Resolder
any bad connections on P1.
5-102
