Furuno 1942 MARK-2 manual Troubleshooting, But Then

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
	characters and	• have a qualified technician check the
[STBY TX] key to
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.

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