5-11
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
tow vehicle is not connected or the
IP address is misconfigured. If the
response is “Hardware error.”, then
there is no connection to the
topside processor.
Poor electrical contacts inside the
tow vehicle or the topside
processor.
Contact EdgeTech Customer Service
for assistance.
Distortion and noise in the port
and starboard images.
Noise or interference from the
ship’s wake.
Check if the tow vehicle is in the
ship’s wake. If it is, reposition it
away from the wake.
the ship’s echo
Turn off the ship’s echo sounder.
The shear pin is fractured.
Check the shear pin for damage.
Replace it if it is.
One or more fins are missing,
damaged or obstructed.
Inspect the tow vehicle fins.
Remove any debris and repair
replace any damaged fins.
GPS data are not displayed in the
DISCOVER 4125 Status bar.
The GPS is not connected to the
laptop computer.
Verify that the GPS is connected to
the laptop computer.
Incorrect selection or setup of the
GPS serial port on the
laptop
Use HyperTerminal to verify that
the navigation string is being input
on the correct serial port. If not,
choose the correct serial port in
DISCOVER and configure it in
accordance with the GPS serial
interface requirements.
above the GPS
Remove the obstruction. Also verify
that the antenna is not close to the
ship’s antenna.
Table 5-2: 4125 Tow Vehicle Troubleshooting Guide
5
If you think cable or connector has malfunctioned, perform the following three simple cable inspections:
x Check for cable twisting.
x Check the external jacket.
x Perform a point to point continuity test of the conductors.
Inspect whether any part of cable was bent beyond the allowable radius. The minimum bending radius of
tow cable used with the 4125 Series Dual-frequency Side Scan Sonar System is 6 inches. The cable may
suffer damage when the cable is wound or twisted with less than this radius.
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