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3. MAINTENANCE AND
TROUBLESHOOTING
3.1 Checklist
Regular maintenance is essential for good performance. Checking the items listed below on a
regular basis will keep the equipment in good shape for years to come.
3.2 Cleaning the Display Unit
Dust or dirt on the cabinet can be removed with a soft cloth. If desired, a water-moistened cloth
may be used. Do not use chemical cleaners, they may remove paint and markings.
To clean the LCD, wipe the LCD carefully to prevent scratching, using tissue paper and an LCD
cleaner. To remove dirt or salt deposits, use an LCD cleaner, wiping slowly with tissue paper so
as to dissolve the dirt or salt. Change paper frequently so the salt or dirt will not scratch the LCD.
Do not use solvents such as thinner, acetone or benzene for cleaning. Also, do not use a
degreaser or an antifog solution, as they can strip the coating from the LCD.
3.3 Transducer Maintenance
Marine life on the transducer face will result in a gradual decrease in sensitivity.
Check the transducer face for cleanliness each time the ship is dry-docked. Carefully remove any
marine life with a piece of wood or fine-grade sandpaper.
Item Action
Cable run If conductors are exposed, replace cable.
Display unit ground If corroded, clean.
Ship’s main voltage If out of rating, correct the problem.
Do not open the cover.
There are no user-serviceable parts
inside.
Refer any repair work to a qualified
technician.
WARNING
WARNING
NOTICE
Do not apply paint, anti-corrosive
sealant or contact spray to coating or
plastic parts of the equipment.
Those items contain organic solvents that
can damage coating and plastic parts,
especially plastic connectors.