18. CAUTION ON SAFETY (PLEASE MAKE SURE TO READ)
44
When the condition of this unit is bad, please check the following points before asking to repair.
Power can not be
turned on.
No display on the
screen.
Bottom or fish can
not be displayed at
all.
Symptoms
Causes
Voltage of battery is lower tan
standard value (11V).
Contact of power connector is
poor.
Incorrect connection of power
cable to boat battery
Wire insider power cable is
cut.
Blown fuse.
Brightness control is set to
minimum.
Transducer is not immersed
into water well.
In case of installing the
transducer inside the hull, it is
not immersed into water
because internal liquid
becomes less.
Remedy
Recharge the battery.
Tighten firmly. Clean and remove
the rust, dust, etc. In case of
corrosion, please replace.
• Replace the power supply cable.
• Replace the connector.
Check the polarity and
connect correctly.
Replace the power cable.
Replace fuse (5A)
Adjust the brightness control.
(Refer to page 19 )
Install the transducer where it
is always immersed under the
waterline.
Supplement liquid so that
transducer can be immersed
into water.
<Faulty of transducer>
Please check the followings. If you find abnormal symptom,
please replace.
1. If you hear the sound like “Bo Bo” from surface of
transducer, it is normal.
2. When you rub the surface of transducer after setting
sensitivity and depth to maximum, if dots like rain appears on
the screen, it is normal.
Contact of transducer connector is bad.
Connect surely. Clean the surface of transducer and remove
the rust, stain, etc.
Replace in case of corrosion.
• Replace the transducer cable.
• Replace the connector of unit. (Ask to repair.)