−30 −
−31 −
TROUBLE SHOOTING
When the condition of this unit is bad, please check the following points before asking to repair.
Symptoms
Causes
Remedy
Power can not be
turned on.
Voltage of battery is lower than
standard value (
11
V).
Recharge the battery.
Contact of power connector is
poor.
Tighten firmly. Clean and remove the
rust, dust, etc. In case of corrosion,
please replace.
・
Replace the power supply cable.
・
Replace the connector. (Ask to repair.)
Incorrect connection of power
cable to boat battery
Check the polarity and connect correctly.
Wire inside power cable is cut.
Replace with new power cable.
Blown fuse.
Ask to repair.
No display on the
screen.
Brightness control is set to
minimum.
Adjust the brightness control.
(Refer to "TO CONTROL BRIGHTNESS
OF SCREEN" page
6
.)
Bottom or fish can
not be displayed at
all.
Contact of transducer conne-
ctor 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.)
<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.
Transducer is not immersed
into water well.
Install the transducer where it is always
immersed under the waterline.
I n c a s e o f i n s t a l l i n g t h e
transducer inside the hull, it
is not immersed into water
b e c a u s e i n t e r n a l l i q u i d
becomes less.
Supplement liquid so that transducer
can be immersed into water.
