Troubleshooting; General Troubleshooting; Radar Troubleshooting - Furuno TZT9 Operator's Manual

14. MAINTENANCE, TROUBLESHOOTING
14.3

Troubleshooting

This section provides simple troubleshooting procedures which the user can follow to
restore normal operation. If you cannot restore normal operation, do not check inside
the unit. Have a qualified technician check the equipment.
14.3.1

General troubleshooting

Problem
You can not turn on the power.
There is no response when a
key is pressed.
The message "HDD warning.
Please contact a dealer." ap-
pears at start up.
14.3.2

Radar troubleshooting

Problem
Nothing appears on the screen
after you press the
select [Tx Radar] from the Ro-
toKey menu to transmit.
Marks and characters appear,
but echoes do not appear.
Picture is not updated or the
picture freezes.
You tuned the receiver, but the
sensitivity is weak.
You changed the range, but the
radar picture does not change.
Poor discrimination in range.
Range rings are not displayed.
You selected [Tx Radar] from
the RotoKey menu to transmit.
The "TX screen" appears, but
the radar goes into stand-by.
14-4
• Check for blown fuse.
• Check that the power connector is fastened.
• Check for corrosion on the power cable connector.
• Check for damaged power cable.
• Check battery for correct voltage output.
Turn off and on the power. If you do not get a response, the key is
damaged. Contact your dealer for instructions.
The hard disk has been used 18,000 hours. See your dealer for
details.
• Select [Tx Radar] from the RotoKey menu again.
• Check that the antenna cable is fastened.
key and
• Check if the radar source is correct.
Check that the antenna cable is fastened.
• Check antenna cable.
• If the picture freezes, turn the power off and on.
Have a technician check the magnetron.
• Try to zoom in or out the radar display.
• Turn the power off and on.
Adjust the sea control.
Select [Rings] from the RotoKey menu to activate the range rings.
This problem indicates that the overload protection has activated.
To restore normal operation, turn off all equipment in the TZT net-
work. Wait a few seconds then turn on all the equipment.
Remedy
Remedy