GP1670F_1870F Operator's Manual - Furuno USA

12. MAINTENANCE,TROUBLESHOOTINGThis section provides maintenance and troubleshooting procedures that the user canfollow to get optimum performance from the equipment. Before attempting any maintenanceor troubleshooting procedure please review the safety information below. Ifyou cannot restore normal operation after following the troubleshooting procedures donot attempt to check inside the equipment; have a qualified technician check the set.WARNINGELECTRICAL SHOCK HAZARDDo not open the equipment.Only qualified personnel can workinside the equipment.IMPORTANTDo not apply paint, anti-corrosive sealantor contact spray to coating or plastic parts.Those items contain organic solvents that candamage coating and plastic parts, especiallyplastic connectors.12.1 MaintenanceCheck the items shown in the table below regularly to prevent unnecessary trouble.Check item Check point RemedyAntenna unitCableDIsplay unitconnectorGroundCheck for loosened andcorroded bolts.Check that cables are tightlyfastened, free of corrosionand not damaged.Check if tightly fastened.Check for tight connectionand rust.Tighten loosened bolts. Replace heavilycorroded bolts.Connect cable if it has loosened. Replacedamaged cables.Fasten if loosened.Fasten if loosened. Remove rust ifpresent.Display unit Dust on the cabinet, LCD Remove dust from the cabinet with a dryclean cloth.Wipe the LCD carefully to preventscratching, using tissue paper andan LCD cleaner. To remove dirt or saltdeposits, use an LCD cleaner, wipingslowly with tissue paper so as to dissolvethe dirt or salt. Change paper frequentlyso the salt or dirt will not scratch the LCD.Do not use commercial cleaners to cleanthe equipment. Those cleaners can removepaint and markings.Transducer Face of transducer Marine life and growth on the transducercan lower sensitivity. Remove any foreignmaterial from the face of the transducerwith a wooden stick or fine sandpaper.12-1