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6.0 TROUBLESHOOTING
The 3400 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
for updated instructions, drawings, documentation, tools, and guidance. This ensures success and is
necessary to maintain the product's warranty.
The 3400 Towfish is a software-controlled computer system that includes both digital and analog
connections between components. Many digital connections share and are dependent on the same data
and address lines, so one component's failure 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.
Should some operational or performance problems occur with the 3400 Sub-Bottom Profiling System, it
may be possible to correct them using the troubleshooting guide below.
This troubleshooting guide identifies some symptoms that could occur and presents one or more possible
causes and the recommended corrective action for each. When using the troubleshooting guide, perform
the corrective action for any given symptom in the order of possible causes, which generally corresponds
to the degree of troubleshooting difficulty, from the simple to the more complex.
Before proceeding with any corrective action(s), verify the following:
•
The topside is plugged into an appropriate power source
•
The 3400 Portable Topside is switched on
NOTE:
Be sure to verify that all the cables in the topside and the Tow
Vehicle are correctly mated and are not loose or damaged. Most causes
of operational or performance problems are a result of a poor
connection.
6.1 Computer System Restoration
The following section outlines the procedures for backing up and restoring the system drive.
CAUTION!
settings. Be sure to backup all data before performing the procedure
below.
1. Ensure that the topside is off.
3400 Portable Sub-bottom System
All data will be lost upon restoring the system to factory
6-98
CUSTOMER SERVICE
0021270_REV_C
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