Furuno MU-155C 5. MAINTENANCE,

5. MAINTENANCE,

TROUBLESHOOTING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel

should work inside the

equipment.

Regular maintenance is important for good performance. Check the following on a regular

basis to keep the equipment in good operating condition.

• Check that the connectors at the rear of the display unit are tightly fastened.

• Check the ground wire and ground terminal for rust. Clean if necessary. Confirm that t he

ground wire is tightly fastened.

• Remove dust and dirt from the dis pla y unit and LCD with a dry, soft cloth. Do not use

chemical cleaners to clean any part of the display unit – they can remove paint and

markings.

• Wipe the LCD carefully to prevent scr atching, 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.

• Clean the filter at the intake vent r egularly. To remove the filter, grasp the intake vent

with fingers and pull forward. Us e an air blower to remove dust and dirt fr om the filter. If

it is particularly dirty, wash it in water or mild detergent and then let it dry. When

reattaching the filter, be sure it is not caught in the holes for the intake vent.

Intake vent

Display unit, rear view