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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)
d. (cont)
b. Use the multimeter set on ohms to
check between Transceiver TB1-9,
chassis, and conduit. Check between
TB1-4 and receive transducer (blue
dot), blue lead. If any of these indi-
cations is not 0 ohms, check the
wire connection at the terminal
strip, conduit connection, and PC
board connections to the chassis.
Ensure that all transducer leads are
making good mechanical connec-
tions.
e. Bad Transceiver
a. Remove wire from TB1-7 in the Pro-
PC board.
cessor. Set the multimeter to ohms,
and check between the R4 lead
nearest the edge of the Transceiver
PC board and the positive lead of
C2 (lead nearest the same side of the
board as R4).
b. Note the setting of the range control
so it may be returned to its original
position after testing. Turn the
range control as far as it will go in
each direction. As the range con-
trol is turned, the meter should
sweep between 0 and approximately
2,500 ohms.
c. If the meter does not sweep between
0 and approximately 2,500 ohms or
if the needle moves in a jerky or
erratic manner, replace the PC board.
(1)
To remove Transceiver PC board,
remove cover, tag and disconnect
wires from TB1. Disconnect
transducer leads from PC board.
Disconnect black ground lead
from PC board. Remove and
keep three 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
5-22
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