TM 5-6350-264-14&P-3
NAVELEX EE 181-AA-OMI-040/E121 R1860 M9443
TO 31S9-2FSS9-1-3
Table 5-1. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective action
1. (cont)
c. (cont)
(2)
To install new PC board, orient
board so the terminal strips are
adjacent to conduit entrance
holes. Secure the PC board to
the chassis with screws. Con-
nect wires to TB1 and TB2.
(3)
Adjust sensitivity control per
steps in TM 5-6350-264-14/1.
d. If voltage at TB2-1 and TB2-2 is good,
check interconnecting wiring for
open circuits and shorts-to-ground.
(1)
To check for a grounded circuit,
disconnect wires from TB2-1
and TB2-2 in the Processor and
TBl-1 and TB1-2 in the Re-
ceiver. Set multimeter to ohms,
and check between each wire
and conduit or between each
wire and shield. An indication
of infinity means a good wire.
Any indication of less than in-
finity means a short-to-ground.
(2)
To check for an open circuit,
ground the wires at one end of
the conduit. At the other end,
check between each wire and
the conduit. A low or zero in-
dication means a good wire; an
indication of infinity means an
open wire.
(3)
Replace any wire that checks bad.
e. If wiring is good, replace Receiver PC
board.
(1)
To remove Receiver PC board, tag
and remove the wires from TB1.
Remove screws holding the PC
board in the housing. Remove
the PC board.
(2)
To replace the PC board, orient
the board so that terminal strip
TB1 is adjacent to the conduit
5-4
