Simrad NX40/45 Installation and Operation Manual
108
Troubleshooting
22
This troubleshooting guide is written with
the assumption that the user has read and
understood the relevant sections in this
manual.
It is possible in many cases to solve
difficulties without having to send the
display unit back to the manufacturer for
repair. Please follow this troubleshooting
section before contacting the nearest
Simrad dealer.
There are no user serviceable parts.
Specialized methods and testing equipment
are required to ensure that the display unit
is reassembled correctly and is waterproof.
Users who service the product themselves
will void the warranty.
Repairs to the product may only be carried
out by a service center approved by Simrad.
If the product must be sent into a service
center for repair, it is essential to send in
the transducer(s) at the same time.
More information can be found on our
Website: www.simrad-yachting.com.
B-1 General problems
1-1 The unit won’t turn on:
The unit is designed to operate on a
•
12/24 volt battery system, where the
voltage may vary from 10.5 to 32 volts.
If an excessive voltage is supplied, a
fuse will be tripped, turning the display
unit off. Check the fuse.
Check that the power cable connector at
•
the back of the display unit is securely
plugged in and the collar is locked in
place. The collar must be secure for
watertight connection.
Measure the battery voltage while
•
the battery is under load - turn on
some lights, radio or other electrical
equipment connected to the battery. If
the voltage is less than 12 volts:
- the battery terminals or wiring on the
•
terminals may be corroded.
- the battery may not be charging
•
correctly or may need replacing.
Inspect the power cable from end to
•
end for damage such as cuts, breaks,
squashed or trapped sections.
Check power wiring.
•
Check for corrosion on the power
•
cable connector and clean or replace if
required.
Check fuses that are placed in line with
•
the power cable. A fuse can be blown
despite appearing to be good or the
fuse may be corroded. Test the fuse
or replace it with a fuse known to be
good.
1-2 The unit won’t turn off:
The unit may have been wired for Auto
•
power. In this case, the unit cannot be
turned off while the ignition power is
on.
1-3 If the unit beeps when turned on
but nothing is shown:
The unit may be operating, but the
•
backlight settings may have been set
too low.
B-2 GPS navigation problems
2-1 No GPS fix or long time to get fix
at startup:
May occur occasionally if the antenna
•
does not have a clear view of the sky.
The satellite positions are constantly
changing.
SimNet cable not connected to display
•
unit.
2-2 GPS position different from true
position by more than 10 m (33 ft):
The unit is in simulate mode. Turn
•
simulate mode off.
The normal error in GPS position will
•
exceed 10 m (33 ft) for about 5% of
the time.
Under special circumstances the US
•
Department of Defence may introduce
a deliberate and changing error in
the GPS positions of up to 300 m
(1000 ft).
