Furuno 1942 MARK-2 manual Troubleshooting, But Then

Page 34

5.3 Troubleshooting

Table 5-2 contains simple troubleshooting procedures which you can follow to try to re- store normal operation. If you cannot restore normal operation, do not attempt to check inside any unit of the radar system. Any re- pair work is best left to a qualified technician.

Table 5-2 Troubleshooting table

	If...	But...	Then...

	you pressed the	the control panel does	• try adjusting the control panel back-
	[POWER] key to turn	not light	lighting on the OTHERS menu.
	on the radar		• battery may have discharged.
			• check fuse in power cable.

		nothing appears on	• try adjusting the brilliance.
		the display or display
		contrast is poor

		characters are	• request service.
		distorted

	the radar has	the scanner does not	• the problem may be in scanner unit.
	warmed up and you	rotate	Request service.
	pressed the
	pressed the	characters and	• have a qualified technician check the
	[STBY TX] key to	characters and	• have a qualified technician check the
	transmit	indications are	set.
		abnormal

	you have adjusted	neither noise nor	• check signal cable for damage.
	the gain with A/C	targets appear
	RAIN and A/C SEA	(indications and
	off	markers do)

		neither indications nor	• check signal cable for damage.
		markers appear (noise
		and targets do)

		the sweep (radial line	• the problem may be in the scanner
		sweeping around the	unit. Request service.
		display) is not
		synchronized with
		scanner rotation

		there is no change in	• request service.
		sensitivity

	a key is pressed	nothing happens	• key may be faulty. Request service.

5-2

Image 34

Contents Marine Radar Page Worst case 1.70 m Stay away from transmitting scannerRadiator Distance to Nil Worst case 1.20 mUse the proper fuse Do not open the equipmentDo not disassemble or modify the equipment Keep heater away from equipmentCompliance with R&TTE Directive 1999/5/EC Features ForewordTable of Contents Menu Tree Menu KEYTable of Contents by INDICATION, Marker Scanner Unit System ConfigurationDisplay Unit How Radar Determines Range What is Radar?Principle of Operation How Radar Determines BearingHow radar works Basic Operation Control DescriptionStand-by Economy modeTurning the Radar On/Off TransmittingAdjusting the A/C SEA Control Reducing sea clutter Adjusting Picture BrillianceAdjusting Receiver Sensitivity Selecting the RangeTip for adjusting the A/C SEA Adjusting the A/C Rain Control Reducing rain clutterAdjusting the A/C SEA control Adjusting A/C RainMeasuring range by range rings Measuring the RangeErasing the Heading Marker, North Marker Measuring range by cursorUsing the Offset EBL Measuring the BearingOffcentering the Picture Cancelling offcentered pictureMeasuring range and bearing between two targets Cancelling zoom ZoomBasic Menu Operation Selecting the Presentation ModeMenu Operation Head upEcho Trail Magnifying Long Range Echoes echo stretchFixed time trail Cancelling echo trailSuppressing Radar Interference Continuous trailSelecting Pulsewidth Guard AlarmSetting a guard zone Selection of guard zone typeWatchman Silencing the audible alarmCancelling the guard zone and guard alarm How watchman worksTurning on watchman Cancelling watchmanDisplaying Navigation Data To turn navigation data on or offOther Menu Description Other Menu DescriptionSuppressing Noise Adjusting Brilliance of MarkersFunction Controls Outputting Target PositionMultiple Echoes False EchoesSide-lobe Echoes Indirect Echoes Blind and Shadow SectorsSummary to detect Sart response Sart Search and Rescue TransponderShowing Sart marks on the radar display General remarks on receiving SartThis page is intentionally left blank Preventive Maintenance Maintenance & TroubleshootingReplacing the Fuse Troubleshooting But ThenSelf Test This page is intentionally left blank Operation of ARP-10 Option Display accuracy is affected by the followingARP-10 Menu Operation Principal specificationsGeneral Keys used for auto plotterDeactivating the auto plotter ARP MenuManual acquisition Setting auto acquisition areaAcquiring Targets Automatic acquisitionIndividual targets Displaying Target DataTerminating Tracking of Targets All targetsCPA/TCPA alarm Mode and Length of VectorsTrue or relative vector vector mode Past Position DisplayLost target alarm This page is intentionally left blank Specifications of Marine Radar Display Unit Dimensions and Mass Index IN-1Page Page Page 00080835401