5. MAINTENANCE, TROUBLESHOOTING
5-5
5.4
Easy Troubleshooting
This section provides troubleshooting procedures that the user may follow to restore
normal operation. If you cannot restore normal operation, do not attempt to check in-
side any unit. Leave any repair work to a qualified technician.
Easy troubleshooting
Problem
Remedy
You can not turn on the pow-
er.
• 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 the input source for monitor.
There is no response when a
key is pressed.
Long press the
POWER
key for approx. seven seconds to turn off the
power. Then, turn on the power again.
Key beep inaudible
Adjust key beep level on the [OPERATION] menu, referring to
paragraph 1.39.4.
Picture not updated or pic-
ture freeze.
Long press the
POWER
key for approx. seven seconds to turn off the
power. Then, turn on the power again.
The power is on and you op-
erated the STBY/TX key to
transmit. The marks and
characters appear, but no
echo appears.
• Check that the antenna cable is fastened.
• Adjust the GAIN and STC levels.
• Adjust the echo brilliance.
Tuning is correctly adjusted,
but sensitivity is poor.
• Clean the radiator face.
• Replace the magnetron. Contact your dealer.
There are unwanted echo
around own ship.
Adjust the STC level.
• The icons are automatical-
ly hidden.
• You can not find the icon.
Turn [HIDDEN ICON] to [OFF]. See paragraph 1.38.2.
You can not adjust the bril-
liance of the screen.
Turn [EXT BRILL CTRL] to [ON] on the monitor MU-190RH.
You can not set the orienta-
tion mode.
• Check the connected equipment.
• Check the heading input (Sentence monitor, Input port, Baud
rate).
• The AIS symbols are not
shown.
• The true trails are not
shown.
• The radar map is not
shown.
Check the connected equipment.
Range rings are not shown.
Adjust their brilliance with [FIXED RING]. See paragraph 1.6.3.
