Furuno 1943, 1933, 1833 manual Preventive Maintenance, Replacement of Battery, Maintenance program

7.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.

7.1Preventive Maintenance

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

Maintenance program

Item	Check point	Remedy
Display unit	Check for tight connection.	Tighten loosened
connectors		connectors.
CRT	The CRT will, in time, accumulate	Do not use chemical
	a coating of dust which tends to	cleaners to clean any part of
	dim the picture. Wipe CRT lightly	the display unit; they can
	with soft cloth to remove dust.	remove paint and markings.
Ground terminal	Check for tight connection and	Clean or replace ground
	corrosion.	wire as necessary.

7.2Replacement of Battery

A battery fitted on a circuit board inside the display unit preserves data when the equipment is turned off, and its life is about three years. When its voltage is low the battery icon () appears at the top of the display. When the icon appears, contact your dealer to request replacement of the battery.

Parts Name	Type	Code No.
Lithium battery	CR2450-F2 ST2	000-133-495

7-1