Furuno FR-8122, FR-8252 Simple Troubleshooting, Simple troubleshooting, But Then, STBY/TX key to

6. MAINTENANCE & TROUBLESHOOTING

6.6Simple 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.

Simple troubleshooting

If...	But...	Then...
you cannot turn on		• check for blown fuse.
the 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
		(10.8-31.2 V).
there is no response		turn off and on the power. If there still is no
when a key is		response the key may be faulty. Contact your
pressed		dealer for advice.
the power is on and	no echo appears	check that the antenna cable is firmly fastened.
you operated the
STBY/TX key to
transmit and marks
and legends appear
tuning is properly	sensitivity is poor	the magnetron may need to be replaced.
adjusted		Contact your dealer.
the range is changed	but radar picture does not	• try to hit the RANGE key again.
	change	• turn the display unit off and on.
poor discrimination		try to adjust A/C SEA control.
in range
the true motion	• Poor contact of MODE	• try to press the key a little harder.
presentation is not	key.
working properly	• TM display is inaccurate	• check if heading and speed are input and
		accurate.
the range rings are		check that the setting of Range Rings Brill in the
not displayed		Brill/Color sub menu is set to other than Off.
target not tracked	Poor definition of targets in	adjust A/C SEA and A/C RAIN controls.
correctly	sea clutter

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