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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
3. (cont)
b. (cont)
k. If voltage on TB2-3 and TB2-4 is be-
tween 5 and 7 volts and if wiring is
good, replace Transceiver PC board.
(1)
To remove Transceiver PC board,
tag and disconnect wires from
TB1. Disconnect transducer
leads from PC board. Discon-
nect 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.
c. Bad transmit or
a. Set multimeter to ac volts. Connect
receive transducer.
leads to Transceiver TB1-1 and
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. Disconnect
one of the added pieces of wire from
5-19
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