Koden CVS-705D, Installation Manual

Page: 72 / 74

Chapter 3 Maintenance CVS-705D/707D
3-6 0092607052-03
3.5 If you suspect a failure
Symptom Possible cause of trouble Measure
Even with power on,
nothing is displayed.

Fuse is blown.

Power voltage is out of
specification (21.6 to 31.2
VDC)

Poor connection between
power cable and battery

Replace the fuse (See “3.3
Fuse Replacement
”, page
3-2.

Use a proper power as per
specification.

Check the connection
between power cable and
battery.
After starting up, nothing is
displayed

Poor connection between
transducer and Display unit

Failure of LCD display panel

Check the connection
between transducer and
Display unit.

Consult a repair shop or
sales agent.
Much interference noise

Improper installation of
transducer

Interference from the echo
sounder on other boats.

Check the installed position
of transducer (See “1.5
Installation of transducer”,
page 1-10.

Implement interference
rejection.
Display of
water temperature / Speed
is abnormal or not
displayed.

Poor connection of sensors
connectors

Input sources may be
abnormal.

Check the connection at
sensor connectors.

Check the input sources.
Display of present
location/course is
abnormal or not displayed.

Poor connection between
this unit and navigation
equipment

Check the connection
between this unit and
navigation equipment.