NorthStar Navigation EXPLORER 435 Manual Do Utilizador

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.

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")