Quantcast Table 5-1. Troubleshooting Procedures - continued - TM-5-6350-264-14-P-30031

 

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Table 5-1. Troubleshooting Procedures - continued - TM-5-6350-264-14-P-30030
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TM-5-6350-264-14-P-3 Receiver Passive Signal Ultrasonic R-1860/FSS-9(V) Processor Passive Signal Ultrasonic TMX-9442/FSS-9(V) Manual
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Table 5-1. Troubleshooting Procedures - continued - TM-5-6350-264-14-P-30032
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
2. (cont)
e. (cont)
(3)
To check for a grounded circuit,
disconnect wires from TB2-7
and TB2-8 in the Processor, the
Ultrasonic Motion Sensor, and
the Passive Ultrasonic Sensor.
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
infinity means a short-to- ground.
(4)
To check for an open circuit,
ground the wires at one end of
the conduit. 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.
(5)
Replace any bad wires.
c. If the signal on the wires removed
from TB2-7 and TB2-8 is correct,
check that the notch filter in the
Processor is hooked up. To verify
hook-up, ensure that there are
jumpers from TB3-1 to TB3-2 and
from TB3-3 to TB3-4.
d. If the notch filter is hooked up, re-
place the Processor PC board.
(1)
To remove Processor PC board,
tag and disconnect wires from
TB1 and TB2. Remove screws.
Remove PC board.
(2)
To install new PC board, ensure
that the new board has jumpers
from TB3-1 to TB3-2 and from
TB3-3 to TB3-4. Orient the
board so the terminal strips are
adjacent to conduit entrance
holes. Secure the PC board to
5-13

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