L3 Comminications SERIES 5000 Operation And Maintenance Manual - page 259
D-56
APPENDIX D General Setup, Configuration and Troubleshooting
Series 5000 Sonar System Operations and Maintenance Manual
P/N 11210060, Rev. 13.0
After a cable problem and the correction of the cable problem the ERROR and
LOCK LOSS lights are on. Do the following:
• Check the towfish fuse.
• Check the 200 VDC.
• Check that R80 is 4.7 ohms.
• Check the waveforms at TP4 and TP6 on the Multiplexer board.
• Check the diodes in the hybrid circuit.
• Replace the Demultiplexer board in the TPU.
• If you are using fiber optics, check that you have 5 volts in the
shackle termination.
D.11.1 Recommended Test Equipment
The following equipment is recommended when servicing or performing
troubleshooting operations.
• Fluke 87 multimeter
• Tektronix TDS 3014 4-channel digital oscilloscope
• Hewlett Packard 4194A impedance / gain – phase analyzer with
measurement unit
• Terminal program such as HyperTerminal
• Small flat blade screwdriver for adjustments
• Medium phillips head screwdriver for #4, 6, 8 screws
• 5/16-inch socket and ratchet head
• #4 hex T handle wrench
• #8 hex wrench
• ¾-inch wrench
• Flat blade screwdriver about 5 inches long for #4 screws
• Wire cutters
• 1-inch wrench
• 9/16-inch wrench
• 9-pin to 9-pin null modem cable