Furuno 520, 511 Maintenance & Troubleshooting, Preventive Maintenance, Do not open the equipment

6.MAINTENANCE & TROUBLESHOOTING

This chapter provides information necessary for keeping your unit in good working order and remedying simple problems.

WARNING

Do not open the equipment.

Hazardous voltage which can cause electrical shock exists inside the equipment. Only qualified personnel should work inside the equipment.

6.1Preventive Maintenance

Regular maintenance is important for optimum performance. A maintenance schedule should be established and should at least include the items below.

Maintenance program

Item	Check point	Remedy
Control unit connector	Check for tight connection.	Tighten loosened connectors.
LCD	The LCD will, in time, accumulate	Wipe the LCD carefully to prevent
	a coating of dust which tends to	scratching, using tissue paper
	dim the picture.	and an LCD cleaner. To remove
		dirt or salt deposits, use an LCD
		cleaner, wiping slowly with lens
		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.
Ground terminal	Check for tight connection and	Clean or replace ground wire as
	corrosion.	necessary.

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