Instruction Manual

7-3
7. 3 Trouble Shootings
7.3.1 Trouble Shootings
For reference, this section presents a troubleshooting guideline for finding defective sections.
Symptom of Error Possible Cause or Cause of Fault Countermeasures
Power is not distributed from the
inboard distribution panel.
Supply power from the distribution
panel.
Power is not supplied from the
power supply unit or NCR-333.
Check that the wiring of the power
unit is correct.
Check that the output voltage of the
power unit or NCR-333 is correct.
Power that the power unit supplies
is out of range.
Replace the power unit.
The fuses in the Power Supply Unit
(Option) are blown out.
Check that the wiring is correct and
replace the fuses.
The power supply cable is broken. Replace the power supply cable.
Power is not supplied
when the power switch
is pressed.
The controller switch is broken. Replace the CMD-953 circuit board.
The LCD malfunctions. Replace the LCD. Some dots are missing
on the LCD.
The control unit malfunctions. Replace the CMJ-501N circuit
board.
The buzzer malfunctions. Replace the CMD-953 circuit board.No alarming sound is
generated.
The control unit malfunctions. Replace the CMJ-501N circuit
board.
The control unit malfunctions. Replace the CMJ-501N circuit
board.
The illumination does
not light.
The LCD malfunctions. Replace the LCD.
The polarity or antenna cable is
incorrect.
Check if the polarity is correct and
connect it.
Neither the receiving station nor the
message type is selected correctly.
Refer to “6.3.1” or “6.3.2”.
The NAVTEX antenna (NAW-333)
is damaged.
Replace the NAW-333.
No NAVTEX message
is received.
The following alarm number
appears: 002, 003, or 004.
Internal receiver 1, 2 or 3 is broken.
Replace the CMN-2333.
The polarity of the serial cable is
incorrect.
Check if the polarity is correct and
connect it.
The interface between the sensor
and NCR-333 is incorrect.
Check if the interface is correct
before its connection.
The sentence that the sensor
generates is not supported by the
NCR-333.
Check the output command and the
version.
The serial format (baud rate, etc.)
does not meet the setting of the
controller.
Check the serial format of the
sensor.
The sensor (GPS, gyro, rate-of-turn
indicator) malfunctions.
Replace the sensor.
Sensor data (external
GPS, gyro, and
rate-of-turn) cannot be
loaded.
Do not attempt to inspect or repair the inside of this equipment with the
exception of qualified service personnel, as doing so may cause fire, electric
shock or malfunction. If any malfunctions are detected, contact our service
center or agents.
WARNING