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4. MAINTENANCE,TROUBLESHOOTING
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel should work
inside the equipment.
4.1 Maintenance
Regular maintenance is important for good performance. Following the recommended
maintenance procedures will help keep your set in good working condition.
4.1.1 General checking
Important points to be checked from time to time are tabulated below.
Maintenance check points
Check point Action
Transducer cable
Power cable plug/transducer cable plug
Display unit ground .
Ship’s mains voltage
4.1.2 Replacement of fuse
The fuse on the power cable protects the equipment against overvoltage/reverse polarity of the
ship’s mains or internal fault of the equipment. If the fuse blows, find the cause before replacing
the fuse. If the fuse blows again after replacement, call for service. A fuse rated for more than 3A
should not be used since it would damage the equipment and void the warranty.
CAUTION
Use the proper fuse.
Use of a wrong fuse can cause fire or
equipment damage.
4-1
If conductors are exposed, replace cable.
If loosened, tighten.
If corroded, clean
If out of ratings, correct problem.