User's Manual

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.
ALR No : Unique alarm number in ALR sentence and ACK sentence.
Table 9-1 List of System Alarm Message
Message Description ALR No.
TXRX (SSW Off) Scanner: Safety switch OFF. 308
TXRX (AZI) Scanner: BP error. 311
TXRX (HL) Scanner: HL error. 312
TXRX (MHV) Scanner: Modulator’s high voltage alarm. 315
TXRX (Data)
Scanner: No communication, communication mismatched, checksum
error, or collision.
326
TXRX (Heater) Scanner: Magnetron heater voltage error. 314
TXRX (Reverse) Scanner: Reverse rotation. 313
TXRX (Video) Scanner: VIDEO error. 309
TXRX (Trigger) Scanner: TRIGGER error.. 310
TXRX (Fan 1) Scanner: FAN 1 error. 320
TXRX (Fan 2) Scanner: FAN 2 error. 320
Keyboard (Data) Operation unit: Communication error or checksum error. 325
Keyboard2 (Data) Second operation unit: Communication error or checksum error. 325
GYRO I/F (Data) GYRO I/F: No communication or checksum error. 324
GYRO I/F (GYRO) GYRO I/F: GYRO error (error bit detected). 110
GYRO I/F (Log) GYRO I/F: Log error (error bit detected). 111
GPS (Status) GPS status error. 103
Position (Data) Latitude / longitude data: No communication or data error. 102
Date (Data) Date data: No communication or data error. 112
Speed (Log) 1-axis log: No communication or data error. 114
Speed (2AXW) 2-axis log (speed over water): No communication or data error. 114
Speed (2AXG) 2-axis log (speed over ground): No communication or data error. 114