21
MAINTENANCE & TROUBLESHOOTING
Do not open the cover.
There are no user-serviceable parts inside.
Refer any repair work to a qualified
technician.
WARNING
4.1 Checking
Regular maintenance is essential for good per-
formance. Checking the items listed in the
table below on a regular basis will keep the
equipment in good shape for years to come.
Table 4-1 Checking
metInoitcA
nurelbaCerasrotcudnocfI
ecalper,desopxe
.elbac
,elbacrewoP
gulpelbacrecudsnart
,denesoolfI
.nethgit
dnuorgtinuyalpsiD.naelc,dedorrocfI
niams'pihSs
egatlov
,gnitarfotuofI
melborptcerroc.
4.2 Cleaning the Display Unit
Dust or dirt on the display unit can be removed
with a soft cloth. If desired a water-moistened
cloth may be used. Do not use chemical clean-
ers to clean the display unit; they can remove
paint and markings.
4.3 Transducer Maintenance
Marine life on the transducer face will result
in a gradual decrease in sensitivity. Check the
transducer face for cleanliness each time the
boat is dry-docked. Carefully remove any
marine life with a piece of wood or fine-grade
sandpaper.
4.4 Replacing the Fuse
The fuse on the power cable protects the sys-
tem from reverse polarity of the ship’s mains
and equipment fault. If the fuse blows, find
the cause before replacing it. Use only a 3A
fuse. Using the wrong fuse will damage the
unit and void the warranty.
Use only a 3A fuse.
Use of a wrong fuse can result in equipment
damage and void the warranty.
WARNING
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