Bedienungsanleitung Navman FISH 4500 (Seite 34 von 36) (Englisch)

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This troubleshooting guide is written with the as-

sumption 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 Navman dealer.

There are no user serviceable parts. Specialized

methods and testing equipment are required to

ensure that the display unit is reassembled cor-

rectly 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 Navman. 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.navman.com.

1. The fishfinder won’t turn on:

a) The FISH 4500/4600 is designed to operate

on a 12/24 volt battery system, where the

voltage may vary from 10 to 35 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 cor-

rectly 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).

Appendix C - Troubleshooting

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 cor-

roded. 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 6-5 Wiring op-

tions.)

3. The fishfinder operates erratically:

a) Check that the transducer does not have de-

bris (e.g. weed, plastic bag) caught around

it.

b) The transducer may have been damaged

during launching, running aground or while

underway with debris etc. If the transducer has

been impacted, it may have been kicked up

on the bracket. If it is not physically damaged,

reset the transducer back to its original posi-

tion. (See the Transom Transducer Installation

Guide.)

c) When the transducer is less that 2 ft. (0.6 m)

from the bottom, the depth readings may

become inconsistent and erratic.

d) Manual Gain may be set too low, which may

cause weak bottom echo or no fish signals. If

in Manual Gain, try increasing the Gain.

e) Ensure the back of the bottom surface of the

transducer is slightly lower than the front and

the front is as deep in the water as possible

in order to minimize the generation of bub-

bles through cavitation. (See the Transom

Transducers Installation Guide.)

f) Check the transducer and power cable

connectors at the back of the display unit

are securely plugged in and the collars are

locked in place. The collars must be secure

for watertight connection.

g) Inspect the power cable from end to end for

damage such as cuts, breaks, squashed or

trapped sections.

h) Ensure there is not another fishfinder or depth

sounder turned on, which may interfere with

this fishfinder.

i) Electrical noise from the boat’s engine or

an accessory may be interfering with the

transducer(s) and/or the Navman fishfinder.

This may cause the fishfinder to

FISH 4500/4600 Installation and Operation Manual34

NAVMAN

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