Furuno 1833, 1943, 1933 Simple Troubleshooting, General troubleshooting, Radar troubleshooting

7. MAINTENANCE, TROUBLESHOOTING

7.5Simple Troubleshooting

This section provides simple troubleshooting procedures which the user can follow to restore normal operation. If you cannot restore normal operation do not attempt to check inside the unit. Any trouble should be referred to a qualified technician.

7.5.1General

	General troubleshooting
If…	Then…
you cannot turn on the	• check for blown fuse.
power	• check that the power connector is firmly fastened.
	• check for corrosion on the power cable connector.
	• check for damaged power cable.
	• check battery for proper voltage output (10.8 to 31.2 V).
there is no response	• turn off and on the power. If there still is no response the key may
when a key is pressed	be faulty. Request service.

7.5.2Radar

Requires a network radar.

Radar troubleshooting

If…	But…	Then…
you pressed the	nothing appears on the display	• check that the antenna cable is
[POWER/BRILL] key		firmly fastened.
and the RADAR TX		• check if radar source is correct.
soft key to show the
radar picture
marks, legends	no echo appears	• check Tx fuse in the power cable.
appear		If it is blown, replace it.
the picture is not	—	• check antenna cable.
updated or it freezes		• for freeze up, turn the display unit
		off and on again.
tuning is adjusted	sensitivity is poor	• magnetron may need to be
		replaced. Contact your dealer.
the range is changed	radar picture does not change	• try to hit the [+] and [-] keys again.
		• turn off and on the display unit.
there is poor	—	• adjust A/C SEA.
discrimination in range
the true motion	—	• reselect true motion mode.
presentation is not		• check if heading and speed are
working properly		input.
the range rings are	—	• hit the RADAR DISPLY and
not displayed		RINGS soft keys to display them.

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