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The 4200 Series High Definition Dual-frequency Side Scan Sonar System is ruggedly designed and built,
and therefore requires little maintenance. However, to ensure long-lasting and reliable service, some
periodic maintenance is recommended.
This section provides maintenance recommendations, and includes instructions on how to disassemble
and reassemble a tow vehicle should any internal components need replacing.
4.1 Clean the 4200 Topside Processor
Maintenance on the 4200 Series High Definition Dual-frequency Side Scan Sonar System should be
performed regularly or as often as necessary, depending on use. However, most of the maintenance is
performed after each deployment and recovery cycle of the tow vehicle.
Other maintenance, such as cleaning of the air filter in the 4200 Rack Mount Topside Processor and 701-
DL Digital Link, can be performed as necessary. Maintenance is not required for the 4200-P Portable
Topside Processor.
4.1.1 Clean the Air Filter in the 4200 Rack Mount Topside Processor
The 4200 Rack Mount Topside Processor includes an air filter located behind the front panel vent. Keeping
the air filter clean will prevent heat buildup that can cause damage to heat-sensitive electronics. Clean
the filter regularly, as often as necessary, to ensure that it functions properly.
To access the filter, open the front panel vent, and then slide the filter out by pulling it to the right. Clean
the filter using a vacuum cleaner or compressed air.
4.1.2 Clean the 4200-P Portable Topside Processor
The 4200-P Portable Topside Processor requires no maintenance other than to inspect and lubricate its
connectors with silicone dielectric grease, such as Novagard G624, the connectors on the side panel.
4.1.3 Clean the 701-DL Digital Link
The 701-DL Digital Link requires no maintenance other than cleaning the cooling fan on the front panel.
To clean the fan, lightly vacuum it from the front.
4.2 Inspect and Clean the Tow Vehicle and Tow Cable after
Use
After retrieving the tow vehicle from the water, use a freshwater hose to wash it down, along with the
tow cable. Thoroughly spray the transducer arrays and remove any buildup of debris. Inspect the cables
and connectors for any damage and check for loose connections. Also, inspect the tow cable and the
connectors on each end.
M A INTEN ANCE
4-1
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