JRC NWZ-4740 - 5.3 Troubleshooting

5-3
5.3 Troubleshooting
5.3.1 Troubleshooting
The following is reference information concerning identification of problems.
Problem Behavior Possible Causes Troubleshooting Measures
Power is not being supplied
by the ship junction box.
Check the cabling from the junction
box.
Power is not being supplied
by the power supply
equipment (option).
Check the power supply unit cabling.
The fuse connected to the
power cable has blown.
If there are no problems in the cabling,
replace the fuse.
The power supply equipment
(option) fuse has blown.
If there are no problems in the cabling,
replace the fuse.
The power does not turn on
when the power switch is
pressed.
The display unit switch is
broken.
Consult with JRC or an affiliate.
The LCD display does not
display anything.
The display does not light
up.
The LCD display is broken. Consult with JRC or an affiliate.
The buzzer is broken. Consult with JRC or an affiliate. The alarm sound. Is not
generated
The alarm sound is turned off. Refer to 4.11.2 for setting the alarm
sound.
The click does not sound. The key press sound is
turned off.
Refer to 4.14.3 for setting the Click
sound.
The sensor connection cable
is cut.
Check the connection cable. There is no reception.
(from sensor)
The sensor is broken. Consult with JRC or an affiliate.
The polarity of the serial cable
is incorrect.
Check the polarity of the cable.
The interface does not match. Check the interface.
There is no reception.
(from external devices)
An unsupported sentence has
been entered.
Check the entered commands and
version.
Output settings have not
been configured.
Refer to 4.20.
The configured channel is
incorrect.
Refer to 4.20.
There is no transmission.
(to external devices)
The DISP-DPU or connector
board is broken.
Consult with JRC or an affiliate.
Do not perform internal inspections or modifications of the equipment.
Inspection or modification by unauthorized personnel may result in fire, electric
shock, or equipment failure. Please consult with JRC or an affiliate to perform
internal inspections or repair.
WARNING