7-98
4205 SIDE SCAN SYSTEM 0021769_REV_D
Improper settings in DISCOVER
(if used on external topside).
Check settings under
“Configuration” and “Network”
the displayed address is
192.9.0.101 with “Port” set to
1700.
The tow vehicle is faulty.
Verify the tow vehicle using a
different digital link. Verify the
digital link with a different tow
vehicle.
Table 7-5: Starmux III Troubleshooting Guide
7.9 Towfish Troubleshooting Guide
The 4205 Towfish is a complex computer-controlled system that requires engineering expertise and the
proper test equipment to service. For any service or troubleshooting, please contact EDGETECH
CUSTOMER SERVICE for updated instructions, drawings, documentation, tools, and guidance. This
ensures success and is necessary to maintain the product’s warranty.
The 4205 Towfish is a software-controlled computer system that includes both digital and analog
connections between components. Many of the digital connections share and are dependent on the same
data and address lines, so the failure of one component may cause others to fail. Therefore, to
successfully troubleshoot an issue, it is best to understand the dataflow and methodically test to isolate
the problem.
An example methodical test procedure is as follows:
1. Ensure that the system is properly installed with all cables connections mated with connectors.
2. Check that fuses have not blown and that the lines connecting them are to the specified electrical
limits. Fuses may fail if a wrong connection has been made during setup. They have also been
known to fail for no apparent reason. Always replace fuses with those of the same value. If a fuse
fails again within a short time, there are more serious problems within the corresponding unit.
3. Check that the cards installed on the topside electronics are properly seated and that any attached
cables are connected, especially if the unit has been in transit. Cards and cables can be checked
visually by opening the top cover of the topside. If the problem persists, disengage, and then
reengage all PC boards. Do the same for all board cable connections, before going on to any
electrical testing.
4. Check the system’s calibration. All calibration adjustments are preset at the factory and should
not require any modifications in the field unless certain mechanical and/or electrical components
are changed, or the adjustments are inadvertently altered. Please contact E
DGETECH CUSTOMER
SERVICE to learn what the default settings are and instructions on how to reset or change them.
5. Ensure that any optional internal or external components aren’t causing the problem by
disconnecting them from the system.
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