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JRC JLR-7500 Instruction Manual: Troubleshooting

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5.3 Troubleshooting

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

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Jlr-7800, Nwz-4740

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