91
9.1 FAULT FINDING
In case of semiconductor circuits, it is deemed that there are few cases in which the used semiconductor
devices have inferior quality or performance deterioration except due to insufficient design or inspection
or by other external and artificial causes. In general, the relatively many causes are disconnection in a
high-value resistor due to moisture, a defective variable resistor and poor contact of a switch or relay.
Some troubles are caused by defective parts, imperfect adjustment (such as tuning adjustment) or
insufficient service (such as poor cable contact). It will also be effective to check and readjust these points.
9.1.1 List of Alarms and other Indications
The system automatically recognizes an internal alarm and displays the alarm message. If an event which
is not trouble but must be reported to the operator occurs, the system notifies the operator of the event.
This section gives the list of alarms displayed by the system and other display lists.
Table 9-1 List of Notification
Message Description
Set GYRO Set a course with the gyro.
TM Reset TM reset will be executed shortly.
Position Reset Own ship position has been reset.
CCRP Changed The CCRP position has been changed.
Weather Information Weather information has been received.
Copying The card is saving the data.
GPS(Low Integrity) GPS Low integrity
TXRX(Standby) Antenna Ready for transmission
PM Test Performance monitor Being tested
GPS (HDOP) The HDOP level is increased (Decrease in the GPS accuracy.).
Table 9-2 List of Target Tracking Alarms and AIS Function Critical Alarms
Message Description
TT(CPA/TCPA) TT Dangerous target
AIS(CPA/TCPA) AIS Dangerous target
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