L3 Comminications SERIES 5000 Operation And Maintenance Manual - page 251
D-48
APPENDIX D General Setup, Configuration and Troubleshooting
Series 5000 Sonar System Operations and Maintenance Manual
P/N 11210060, Rev. 13.0
The +5 volts is generated by 3 voltage regulators. Check for +5 VDC at U27, pin
3; U25, pin 3; and U31, pin 3 for the optional laser. TP 2 may be used as a
reference ground. Check for -5 VDC at pin 3 of U26. TP 2 may be used as a
reference ground.
Some useful test points and waveforms are shown in Figure D-23.
D.8.11 Checking the Transmitter Board
By probing on the Multiplexer board you can check that the Transmitters are
working. Probe each transmitter trace as shown in Figure D-24 on page D-50, and
you should see a scope trace similar to the one shown in the figure. You can
change the pulse width to 100 µsec and back to 50 µsec on the System 5000
Control tab of the Sonar Interface dialog box. If you do not see anything on the
altimeter transmitter, check that it is turned on by sending an Altimeter ON
command, $TA1, to the towfish. The command is sent from the Towfish
Diagnostics tab.
D.8.12 Checking the Receiver Boards
If your sonar image seems to be having problems on one side, this is an indication
that you may have a receiver problem. Try swapping the receiver boards and see if
the problem follows the board.
Figure D-22:
The Multiplexer Board