NorthStar Navigation EXPLORER 435 - Manual (Page 28)

Northstar Explorer 435/438 Installation and Operation Manual 28
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.
Repairs to the product may only be carried out
by a service centre approved by Northstar. If the
product must be sent into a service centre 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. The fishfinder won’t turn on:
a) The Explorer 435 and Explorer 438 are
designed to operate on a 12 volt battery
system, where the voltage may vary from
10 to 16.5 volts. If an excessive voltage is
supplied, a resettable fuse will be tripped,
turning the display unit off.
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.
Appendix B - Troubleshooting
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) Ensure that the red wire is connected to the
positive battery terminal and the black wire to
the negative battery terminal. If wired for the
Auto Power option, ensure the yellow wire is
connected to the ignition circuit. Also check
the boat’s main switch circuit (see section 6-5
Wiring options).
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.
2. The fishfinder won’t turn off:
The fishfinder may have been wired for Auto
power. In this case, the fishfinder cannot be
turned off while the ignition power is on.
(See Auto power wiring in section 6-4 Wiring
options.)
Explorer 435 and 438
5.0" (126.0 mm)
3.5" (88.5 mm)
1.1" (27.9 mm)
5.7" (143.5 mm)
5.0" (126.0 mm) Explor
er
435: 89
mm (3
.5")
1.2" (30.5 mm)
Explor
er
438: 97 mm
(3
.8")