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Page Title:
Table 5-1. Troubleshooting Procedures - Continued |
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 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
4. (cont)
c. Bad transmit or
a. Set multimeter to ac volts. Connect
receive trans-
leads to Transceiver TB1-1 and
ducer.
TB1-2. The meter should indicate
7 to 14 vac. Remove the leads from
the transmit transducer (white dot).
The meter indication should increase
a few volts when the leads are dis-
connected.
b. Obtain two pieces of wire 18 to 28
AWG and about 12 inches (30.6 cm)
long. Disconnect all four transducer
leads from PC board. Use the two
pieces of wire to extend the receive
transducer (blue dot) leads so they
can be connected to the transmit
transducer terminals on the TAS end
of the PC board. The meter should
indicate 7 to 14 vac at TB1-1 and
TB1-2 in the Transceiver. Discon-
nect one of the added pieces of wire
from the PC board. The meter indi-
cation should increase a few volts.
c. If the meter indication does not in-
crease when one of the transducers
is disconnected, replace that transducer.
(1)
To remove a transducer, discon-
nect transducer leads from PC
board; disconnect black ground
lead from PC board; and remove
screws holding PC board to
transducer mounts. Remove PC
board. Remove hardware that
secures chassis to mounting
surface. Remove enough con-
duit clamps to swing Transceiver
chassis away from the mounting
surface. Remove screws that
secure transducer mounts to
sides of the chassis. From the
rear of the chassis remove screws
that secure the transducer mount
to the rear of the chassis. Re-
move the transducer mount.
Use a 7/8-inch (2.2-cm) rod,
such as a wooden dowel, to
5-25
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