NorthStar Navigation EXPLORER 657 - Manual (Page 86)

Northstar Explorer 657 Installation and Operation Manual 86
1-1 The 657 won’t turn on:
a The 657 is designed to operate on a 12/24
volt battery system, where the voltage may
vary from 10.5 to 30.5 volts. If an excessive
voltage is supplied, a fuse will be tripped,
turning the display unit off. Check the fuse.
b 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.
c 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 10 volts:
- the battery terminals or wiring on the
terminals may be corroded.
- the battery may not be charging
correctly or may need replacing.
d Inspect the power cable from end to end for
damage such as cuts, breaks, squashed or
trapped sections.
e Check power wiring (see section 18-4).
f Check for corrosion on the power cable
connector and clean or replace if required.
g 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.
Appendix B - Troubleshooting
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 Northstar 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.
B-1 General problems
Repairs to the product may only be carried out
by a service center approved by Northstar. 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.northstarnav.com.
1-2 The 657 won’t turn off:
The 657 may have been wired for Auto
power. In this case, the 657 cannot be turned
off while the ignition power is on (see section
2-2).
1-3 If the 657 beeps when turned on but
nothing is displayed:
The 657 may be operating, but the backlight
settings may have been set too low (see
section 2-3).
1-4 The wrong language is displayed:
See section 17-1.