Furuno FR-8051 Interval Check point Check and measures Remarks, Part Type Life expectancy Remarks

3.1 Periodic Maintenance Schedule

Interval	Check point	Check and measures	Remarks
Weekly	Display unit	Periodically clean the exterior of	CRT screen produces static charge
		display unit using dry soft clean. Use	which would attract dust. DO
		of commercially available CRT	NOT use strong solvent like paint
		cleaner (spray) having antistatic	thinner or abrasive cleaners for
		effect is recommended.	cleaning.
			Dust and dirt on CRT creates
			symptoms similar to poor
			sensitivity.
3 to 6	Exposed nuts	Check for corroded or loosened nuts	Sealing compound may be used
months	and bolts on	and bolts. If necessary, clean and	instead of paint. Apply a small
	antenna unit	repaint them thickly. Replace them if	amount of grease between nuts
		heavily corroded.	and bolts for easy removal in
			future.
	Antenna	Check for dirt and cracks on radiator	Do not use plastic solvent
	radiator	surface. Thick dirt should be wiped	(acetone) for cleaning. If you need
		off with soft cloth dampened with	to remove ice from antenna unit,
		fresh water. if a crack is found, apply	use a wooden hammer or plastic
		a slight amount of sealing compound	head hammer. Crack on the unit
		or adhesive as a temporary remedy,	may cause water ingress, causing
		then call for repair.	serious damages to internal
			circuits.
	Terminal strips	Open antenna cover to check	When closing antenna covers in
	and plugs in	terminal strip and plug connections	position, be careful not to catch
	antenna unit	inside. Also check the rubber gasket	loose wires between covers and
		of antenna covers for deterioration.	unit.
6 months	CRT and	High voltage at CRT and	If CRT anode rubber cap or wire
to one	surrounding	surrounding components attract dust	sheath is cracked, ask your dealer
year	components	in environment which will cause	to replace it. Wait for at least 3
		poor insulation. Ask your nearest	minutes until high voltage
		FURUNO representative or dealer to	components (CRT and HV
		clean internal high-voltage	capacitors) discharge their residual
		components.	charges before accessing them.
	Terminal	Check for loose connections. Check
	strips, sockets,	contacts and plugs for proper seating,
	earth terminal	etc.

3.2 Life Expectancy of Major Parts

Part	Type		Life expectancy	Remarks
Antenna	D8G-516	(24 rpm	Gears more than	Wind load
motor	D8G-570	(36 rpm)	10,000 hours	100 knots
Magnetron	MG5232/E3560 (6 kW)		2,000-3,000 hours
	MG5241/E3566 (10 kW)
	9M752/M5187F (25 kW)

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