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6. MAINTENANCE & TROUBLESHOOTING
6-3
6.2 Fuse Replacement
A fuse is in the fuse holder on the power cable and inside the power supply unit, and they protect
the equipment from reverse polarity of the ship's mains and equipment fault. If a fuse blows, find
out the cause before replacing it. Use the correct fuse. Using the wrong fuse will damage the
equipment and void the warranty.
6.3 Magnetron Life
When the magnetron (generates microwaves) has expired, distant targets cannot be seen on the
display. When you feel that long range performance has decreased, contact a FURUNO agent or
dealer about replacement of the magnetron.
6.4 LCD Backlight Life
The life of the LCD backlight, which provides illumination for the LCD, is approximately 4,300
hours. The display brilliance cannot be raised when the backlight has worn out. Have a qualified
technician replace the backlight when brilliance cannot be raised.
Unit and fuses
Unit Type Code No. Remarks
DIsplay unit
(fitted on power
cable)
FGBO 15A AC125V 000-549-014 12 VDC
FGBO 10A AC125V 000-549-065 24 VDC
Power supply unit
(for FR-8252)
FGBO 15A AC125V 000-549-014 12 VDC
FGBO 7A AC125V 000-549-013 24 VDC
Model and magnetron
Model Magnetron type Code no. Estimated life
FR-8062 MAF1422B 000-146-871 Approx. 3,000 hours
MG4006 000-150-838
FR-8122 MAF1425B 000-146-872
FR-8252 M1458F 000-140-344 Approx 1,000 hours
Part Type No. Code No.
Lamp holder complete set 121LHS18 000-158-827-10
WARNING
Use the proper fuse.
Use of a wrong fuse can result in damage
to the equipment or cause fire.