4-10 SECTION 4: Maintenance and Troubleshooting
3200-XS Sub-Bottom Profiling System User’s Manual Doc. No. 990-0000026-1000, Rev. 2.3
Vertical black streaks are
present in the Sonar display.
One or more of the underwater
connectors are loose or have
corroded contacts.
Refer to “Inspecting and Cleaning
the Underwater Connectors” on
page 4-2 and inspect and clean
the connectors. Reconnect the
connectors, and if necessary,
secure them using duct tape.
Extended use has caused a
conductor in the tow cable or the
cable harness in the tow vehicle to
break.
Check the continuity of the
conductors in the tow cable and in
the cable harness.
There is white data dropout in
the Sonar display.
The Power Amplifier is
overheating.
Check the Power Amplifier for
excessive heating.
A connector is loose or flooded. Wiggle the tow cable connections
and the connectors of the cable
harness in the tow vehicle while
watching the Sonar display for
white streaks. If white streaks are
present, refer to “Inspecting and
Cleaning the Underwater
Connectors” on page 4-2 and
inspect and clean the connectors.
Reconnect the connectors, and if
necessary, secure them using
electrical tape or locking sleeves.
There are periodic streaks in
the Sonar display from AC
noise.
The system is not properly
grounded.
Check the continuity between the
GND connection on the back of
the Deck Unit to ship’s ground.
The return signals from the
hydrophone arrays are being
clipped.
Reduce the preamplifier gain or
the transmit power, or both.
Noise is present in the Sonar
display.
Engine noise is coupling into the
sonar frequency band.
Isolate the engine noise.
The tow vehicle is in or near the
ship’s wake.
Tow the tow vehicle at a deeper
depth and farther away from the
ship.
The tow vehicle is not level when
being towed.
Level the tow vehicle by adjusting
the tow point such that the tow
vehicle is level when moving
through the water at 3 to 5 knots.
The tow vehicle is being towed too
fast.
Lower the speed of the tow
vehicle.
Table 4-1: System Troubleshooting Guide (Continued)
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
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