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
3 (cont)
(cont)
(3)
Adjust sensitivity control per
steps in TM 5-6350-264-14/1.
e. If voltage on these terminals is good,
check 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 TB2-2 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 circuit. At the other end,
use the multimeter set on ohms
to check between each wire and
conduit. A low or zero indica-
tion means a good wire; an in-
dication of infinity means an
open wire.
(3)
Replace any bad wires.
f
If voltage on wires removed from
TB1-1 and TB1-2 in the Receiver
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
connections. Secure the PC
board to the housing with screws.
Attach the wires to TB1.
5-15
