Quantcast Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-20031

 

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Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-20030
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TM-5-6350-264-14-P-2 Transceiver Ultrasonic Motion Signal RT-1 161 / FSS-9(V) NSN
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Table 5-1. Troubleshooting Procedures - Continued - TM-5-6350-264-14-P-20032
TM 5-6350-264-14&P-2
NAVELEX EE181-AA-OMI-030/E121 RT1161 M9443
T.O. 31S9-2FSS9-1-2
Table 5-1. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective action
2. (cont)
h. (cont)
all the way out. Disconnect wire
from TB1-2. Set multimeter to ohms
and connect leads to TB1-5 and
TB1-6. With all Transceiver covers
closed, resistance indication should
be 2,000 ohms or less. Slowly open
the first Transceiver housing cover.
While the cover flanges are still
engaged, the meter indication should
change to over 100,000 ohms. Re-
move cover. Pull the TAS plunger
all the way out; the resistance indi-
cation should drop to its former
level. Repeat the test on remaining
Transceivers.
b. Use a straightedge across the Processor
chassis to hold TAS plunger down.
Slowly raise the straightedge to
simulate opening the cover. A move-
ment of less than 1/4 inch (0.635 cm)
should cause the meter indication to
change to over 100,000 ohms.
c. If the TAS on any unit fails, replace
the PC board in that unit.
(1)
To remove Transceiver PC board,
tag and disconnect wires from
TB1. Disconnect transducer
leads from PC board. Disconnect
black ground lead from PC
board. Remove screws that
secure PC board. Remove PC
board.
(2)
To install new PC board, shift
board off center toward receive
transducer (blue dot). Align
single screw hole in board with
screw hole in center of receive
transducer mount. Ensure that
black ground wire is not caught
under board. Insert screws
through PC board and tighten
them to secure board. Connect
wires to TB1. Connect trans-
ducer leads and black ground
lead to PC board.
5-15

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