Unit installation

Troubleshooting and Maintenance
974-24007001/4.1 65
1. Trawl cable and/or winch slip-ring problems,
2. Sonar head and sensor module connector and interconnect cable
failures,
3. Excessive impacts and/or physical damage to trawl unit
electronics.
In all three cases, proper handling and maintenance can
significantly reduce the frequency of FS failures. The following
sections outline the recommended handling and maintenance for the
FS system.
5.3.1 Wheelhouse Electronics
Once installed these units require little maintenance other than
removing dust. A damp, lint-free cloth should be used for this
purpose.
5.3.2 Trawl Unit
The Trawl Unit is subjected to the harshest conditions and therefore
proper handling and maintenance is crucial to ensure trouble free
operation.
5.3.2.1 Handling Tips
Though the trawl unit electronics are ruggedized for the fishing
environment mishandling or repeated impacts may result in damage
to, or failure of, the electronic components. Care should be taken at
all times to avoid dropping or impacting the trawl unit or the
individual components.
Avoid scratching the surface of the sonar head housings. The
anodized surfaces (black coating) are there to protect the electronic
housings from corrosion and any damage to these surfaces will
increase the likelihood of corrosion.
Ensure correct installation of the sonar head into the trawl housing
to avoid improper operation. A locking block is located at the end
cap to secure the sonar head into the lower part of the housing.
Protect connector mating surfaces from corrosion and damage. At
the first sign of damage, connectors should be replaced!
Pigtails must be properly attached to the trawl cable and the