Troubleshooting; General Troubleshooting; Radar Troubleshooting - Furuno MFD12 Operator's Manual

14.4

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.
14.4.1

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.
14.4.2

Radar Troubleshooting

Problem
Nothing appears on the display
after you press the power
switch followed by the GAIN/TX
key to transmit.
Marks and legends 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.
True motion mode is not operat-
ing correctly.
Range rings are not displayed.
You pressed the GAIN/TX key
to transmit. The "TX screen" ap-
pears, but the radar goes into
stand-by.
• 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 (10.8 to 31.2 V).
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.
• Make sure to push the key for more than one second.
• Check that the antenna cable is fastened.
• Check if the radar source is correct.
Check that the antenna cable is fastened.
• Check antenna cable.
• If the picture freezes, turn the display unit on and off.
Have a technician check the magnetron.
• Try to hit the RANGE keys again.
• Turn the display unit off and on.
Adjust the Sea control.
• Select the true motion mode.
• Check if the heading and speed are input.
Use the Rings soft control to activate the range rings.
This problem indicates that the overload protection has activated.
To restore normal operation, turn off all equipment in the NavNet
network. Wait a few seconds then turn on all equipment.
14. Maintenance, Troubleshooting
Remedy
Remedy
14-3