Troubleshooting; General Troubleshooting; Radar Troubleshooting; Plotter Troubleshooting - Furuno TZTL12F Operator's Manual

14.4

Troubleshooting

This section provides simple troubleshooting procedures that the user can follow to re-
store 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.
Picture is not displayed properly.
Nothing appears on the screen
after you press the power switch.
The display has frozen.
14.4.2

Radar troubleshooting

Problem
You tapped the [TX] icon on the
radar display to transmit but
nothing happens.
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 tapped the [TX] icon to
transmit. The "TX screen" ap-
pears momentarily, but the ra-
dar soon goes into stand-by.
14.4.3

Plotter troubleshooting

Problem
Position is not fixed.
The track of your ship is not
plotted.
• Check for blown fuse.
• Check that the power connector is tightly fastened.
• Check for corrosion on the power cable connector.
• Check for the power cable for damage.
• Check battery for correct voltage output.
• Use bare finger to turn on the power. (The power cannot be
turned with gloved hands.)
Turn off and on the power. If the picture is still improper, contact
your dealer for instructions.
Check if the unit is plugged into the power source.
Push the power switch until the power goes off. Turn the power
on again.
• Tap the [TX] icon again. (The icon is filled in white when the ra-
dar is in transmit state.)
• Check that the antenna cable is tightly fastened.
• Check if the radar source is correct.
Check that the antenna cable is tightly fastened.
• Check the antenna cable for damage, loose connection.
• If the picture has frozen, turn the power off and on again.
The life span of the magnetron is over. Have a technician check
the magnetron.
• Try to change the range again.
• Turn the power off and on again.
Adjust the sea control.
Check if [Range Rings] is turned on in the [Layers] menu.
The overload protection has activated. To restore normal opera-
tion, turn off all equipment in the network. Wait a few seconds then
turn on all the equipment.
Check for interfering objects near the display unit that might be
blocking reception.
Check if [Tracks] is turned on in the [Layers] menu.
14. MAINTENANCE, TROUBLESHOOTING
Remedy
Remedy
Remedy
14-3