Furuno SC-120 - Manual (Page 60)

4. MAINTENANCE, TROUBLESHOOTING
4-2
4.2 Troubleshooting
This section provides basic troubleshooting procedures which the user may
follow to restore normal operation.
Troubleshooting
Symptom Cause Remedy
Power connector on the
processor unit Firmly connect the power
connector.
Power supply failure Check the power supply.
Cannot turn on the power.
Blown fuse Check the fuse.
Heading indication
changes randomly when
ship is at anchor or does
not change when ship
moves. Sensor trouble Run the diagnostic test2 to
determine the cause.
Connection between
SC-120 and external
equipment has loosened Firmly fasten the
connector. Heading output from
SC-120 does not appear
on external equipment.
Sensor trouble Run the diagnostic test1 to
determine the cause.
If large hading error occurs or heading indication is frequently interrupted,
contact your dealer for advice.
4.3 Diagnostics
Diagnostic test1
The diagnostic test checks the equipment for proper operation.
Note: Heading is not output during the diagnostic test, and this is communicated
with an appropriate message. After completing the diagnostic test, turn the
power off and on to update heading data.
1. Press the [MENU] key to open the menu.
2. Choose SYS SETUP and press the [ENT] key.
3. Choose TEST? and press the [ENT] key.
TEST1
TEST2
Test menu options
4. Confirm that TEST1 is selected and press the [ENT] key.
TEST START?
(STOP: PWR OFF)
ARE YOU SURE?
YES NO
Test start prompt