Furuno GP-33 - Manual (Page 66)

8. MAINTENANCE, TROUBLESHOOTING
8-2
8.2 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.
Symptom Remedy
You cannot turn on the power. Check that power cable is firmly fastened.
Check for damaged power cable and connector.
Check battery for proper voltage output.
No picture appears.
Press the /BRILL key several times to adjust the
brilliance.
There is no response when a key
is pressed. Turn off and on the power. If no change, ask your
dealer.
Position is not fixed within 90 sec-
onds. Check that antenna connector is firmly fastened.
Check the number of satellites on Satellite Monitor
display. If there are two or less, check for obstruc-
tions between antenna unit and satellites.
Position is wrong. Check that the correct geodetic chart system is se-
lected on the GPS Setting screen.
Enter position offset on the GPS Setting screen.
Loran C TDs do not appear. Check Loran C chain data on the Pos/TD Setup
screen.
Loran C TDs are wrong. Enter TD offset on the Pos/TD Setup screen.
Bearing is wrong. Check Magnetic Variation on the Plotter Setup
screen.