Simple Troubleshooting - Furuno GP-3500 Operator's Manual

11. MAINTENANCE & TROUBLESHOOTING
11.5

Simple 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.
If...
you cannot turn on the power
no picture appears
there is no response when a key
is pressed
position is not fixed within 90 seconds
position is wrong
the track is not plotted
Loran C (or Decca) TDs are wrong
Loran C (or Decca) TDs are wrong
Bearing is wrong
The ship's speed indication is not zero after
the ship is stopped
11-4
General troubleshooting
●check for blown fuse
●check that the power connector is firmly fastened
●check for damaged power cable.
●check battery for proper voltage output.
●press the [POWER] key a little harder.
●press the [BRILL] key for several times.
●turn off and on the power.
Plotter troubleshooting
If...
Then...
Then...
●check that antenna connector is firmly
fastened.
●check number of satellites received, on the
GPS STATUS display.
●check that the correct geodetic chart system
is selected on the NAVIGATOR SETUP menu.
●enter position offset, on the NAVIGATOR
SETUP menu.
●check that "1. ON" is selected at DISP
TRACKS (HOLD) in the MARKS/SHIP'S
TRACKS SETUP menu.
●check that "1. ON" is selected at SHIP'S
TRACKS DISP in the MARKS/SHIP'S
TRACKS SETUP menu.
●enter TD offset, on the PLOTTER SETUP
menu.
●enter TD offset, on the
●check the MAGNETIC VARIATION in the
DISPLAY SETUP menu.
●try to decrease speed/course smoothing.