Fuso FEG-881, Operation Manual

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2. Diagnosis
Following describes the general status of the troubles and how to treat the troubles.
Operator should not try to check inside the machine even the application of routine troubleshooting
described in Manual does not work. Wrong check and maintenance, repair can cause to
deteriorate the performance of the machine and reduce the lifetime of the machine.
Therefore be sure to leave any kinds of repair work to the hand of specialist.
Symptom How to treat with
Power would not turn on 1. Check whether power connector is properly fixed.
2. Check a Power supply unit and Fuze.
Satellite data would not be
received.
1. Check whether the connector for GPS antenna and antenna cable is defective.
Screen is shaking or white line
appears.
Screen color is sometimes
changing.
1. Check LCD contact point.
2. Clean contact point for LCD connector.
Position coordinator is
inaccurate
1. Check whether 'WGS-84' is selected at Geodetic tool..
2. Set the value ‘0” if compensating function for latitude and longitude is set.
The value of the speed of the
ship is inaccurate.
1. Adjust the smoothing function to make it high for slow speed ship and make it
low for fast speed ship.
Difficult to discriminate the
school of fish and the sea
bottom due to low sensitivity.
1. Increase the sensitivity and decrease the attenuation.
A number of sea bottom
appears.
1. It occurs due to wave being reciprocated often because sea depth is set too
low or sensitivity is set too high. Please adjust the sensitivity.
A record of the school of fish
and sea bottom is not constant
1.It occurs due to ship’s rolling and pitching, blowhole due to ship screw or
blowhole due to fore front ship.
Transmitting line does not
appear.
1. If starting point of sea depth is not set “0”, adjust it to '0'.