Honda HE-670 Operation Manual page 50

Symptoms
Image does not
sometimes appear.
Bottom or fish
school is not
displayed well.
Many noise appear
on the screen.
Causes
Transducer is not immersed
into water well.
When installation of transducer is
bad, air bubbles wind easily at high
speed sailing. It results in no
display.
Influence of air bubble when
the boat runs across the wakes of
.
another boat
Too low sensitivity.
<Installation of transducer is
bad>
• Transducer glued inside the boat's
bottom almost come loose.
• Transducer installed on boat does
not face just under the boat.
Rubbish, weed or etc. attached on
the surface of transducer.
In case of installing boat's bottom or
liquid is dirty, the transducer inside
the hull.
As the reflected echoes are very weak at the below described place,
the image low sensitivity may be shown. But it is not trouble.
where there are where there are
many sea weeds.
many sludge.
Too high sensitivity.
Interference with other boat's
fish finder
Noise from engine
45
Remedy
Install the transducer where it is
always immersed
waterline.
Check the installation of
transducer.
Move the own boat or wait
until air bubbles disappear.
Increase the sensitivity.
Or set to Auto Gain (automatic
sensitivity control).
Re-install the transducer at
adequate position.
Remove the attachment well.
Remove the stain from boat's
bottom. Replace the liquid.
where there are where the water
many mud of
is whirled by
rubbish. rapid current.
Decrease the sensitivity.
Or set to Auto Gain (automatic
sensitivity control).
Noise disappears if the
adequate distance between
own boat and other keeps.
Change the routing of cables
such as transducer cable,
power supply cable, or etc.
(Separate from engine as far
as possible.)
under the