Furuno CH-300 - Manual (Page 111)

6. MAINTENANCE, TROUBLESHOOTING
6-3
6.4 Transducer Maintenance
When the ship is dry-docked remove marine growth from the transducer with fine
sandpaper or a piece of wood. Coat the transducer face with anti-fouling paint (Chugoku
MarineStar 20 Red or the equivalent)
NOTICE
Do not paint the transducer face.
Loss of sensitivity will result.
Do not use plastic solvents to clean the
transducer.
They can damage the transducer.
6.5 Fuse Replacement
The fuse in the hull and transceiver units protect them from overvoltage, equipment fault
and reverse polarity of the ship’s mains. If the power cannot be applied first check that the
power cable between the transceiver unit and the monitor unit is firmly connected. If the
power still cannot be applied, the fuse in the transceiver unit may have blown. Have a
suitably qualified technician check the fuse.
Unit Type Code No.
Transceiver Unit FGMB 10A AC125V 000-104-815
Hull Unit FGMB 7A 125V 000-105-868
Monitor Unit FGMB 3A 125V 000-104-909
Interface Unit FGMB 0.2A 125V 000-121-723
WARNING
Use the proper fuse.
Use of a wrong fuse can cause fire or
damage the equipment.