Samyung Navis 3800, User Manual

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1. System Maintenance and Repair
It is essence to have a routine maintenance and troubleshooting for the equipment for keeping its
performance in a normal condition. Maintenance and troubleshooting means periodical check up
the system, software up-grade including following items.
Item Contents
Connector & Terminal
Check up whether Connector and terminal at the rear of the unit is
properly connected
.
Cables
Check up the condition for all sorts of the cables. Replace it with new
one if it is damaged or cut off
.
Earth Terminal and
cable
Check up the condition of the Earth terminal. If it is rusted or
defective, replace with new one or clean it. Also make sure the
connection status of the earth cable
.
Cleanliness
Remove out the dust from LCD by using clear, LCD should be
handled with care to prevent from damaging.
If salt or dirty is adhered to the unit, remove it by using clean tissue
or soft cotton. Using chemicals is prohibited for cleaning the surface
of the unit because it may cause to wash out the painting of letter..
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 Check whether power connector is properly fixed.
Check whether power connector is properly fixed.
Satellite data would not be
received.
Check whether the connector for GPS antenna and
antenna cable is defective.
Check if [GPS PORT Set] is in [Internal] or not.
Screen is shaking or white line
appears.
Screen
color is sometimes
changing.
Check LCD contact point.
Clean contact point for LCD connector.
Position coordinator is inaccurate Check whether 'KOREA' is selected at Geodetic tool.
Set the value ‘0” if compensating function for latitude and
longitude is set.
The value of the speed of the ship
is inaccurate. 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. Increase the sensitivity and decrease the attenuation.
A number of sea bottom appears. 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 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. If starting point of sea depth is not set “0”, adjust it to '0'.