3. MAINTENANCE, TROUBLESHOOTING
3-2
3.3 Basic Troubleshooting
This section provides basic troubleshooting which the user may follow to restore nor-
mal operation. If the problem is not rectified, contact your dealer for advice.
Symptom Possible cause and remedy
Cannot turn the power on. Power cables may be damaged or corroded. Check the cables for cor-
rosion or damage; replace as necessary.
Power cable may be loose or disconnected. Check the cable connec-
tions are fastened firmly.
Blown fuse. Check the fuses. If blown, contact your dealer for replace-
ment.
Ship battery may have low voltage. Check that the battery voltage is
within rating.
Display screen is blank. Brilliance level may be too low. Press the BRILL key to adjust the bril-
liance.
No position fix. Antenna cable may be loose or disconnected. Check the antenna cable
is fastened firmly.
Unable to see more than two satellites. Check that there are no large
obstructions preventing a clear view to the sky.
GPS needs to be restarted. From the main menu, select [SYS-
TEM]o[RESET SETTINGS]o[CLEAR GNSS]o[YES].
Large error between actu-
al and indicated location.
Positioning system may be incorrect or sensor is faulty. From the main
menu, select [GNSS]. Confirm that the settings for [POSN. SYSTEM]
and [MODE] are correct.
Heading indication chang-
es randomly when the
vessel is anchored or
does not change when the
vessel is moving.
Antenna may be poorly located or unable to obtain a positioning fix.
1) Check that the antenna has a clear view to the sky.
2) Check that the installation location is not subjected to excessive vi-
brations.
3) Check that there the antenna is not subject to interference from
nearby equipment
Sensor may be faulty.
1) Check the sensor status from the [SENSOR] menu.
2) Run a [DIAGNOSTIC TEST] from the [MAINTENANCE] menu.
If one or more sensors are faulty, contact your dealer for advice.
Data output from the SC-
70/SC-130 does not ap-
pear on external equip-
ment.
Connection between the SC-70/SC-130 and external equipment is
loose or damaged.
Check connection, replace or reconnect/refasten as necessary.
Output settings are incorrect.
From the main menu, select [I/O], then select the output port. Confirm
that the settings are correct.
Sensor may be faulty.
1) Check the sensor status from the [SENSOR] menu.
2) Run a [DIAGNOSTIC TEST] from the [MAINTENANCE] menu.
If one or more sensors are faulty, contact your dealer for advice.
External equipment not set correctly.
1) Check the external equipment data input settings.
2) Output data and input data connection should set as follows:
SC70/SC-130=TD-A mconnectiono external equipment=RD-A
SC70/SC-130=TD-B mconnectiono external equipment=RD-B
The external equipment
can not received CANbus
(NMEA2000) data from
SC-70/SC-130.
Turn on the CANbus network (NMEA2000) before the SC-70/SC-130.
If the SC-70/SC-130 is turned on before the CANbus network
(NMEA2000), reboot the SC-70/SC-130.
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