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11. MAINTENANCE & TROUBLESHOOTING
11-4
Sounder troubleshooting
If ... Then ...
picture does not move although marks
and characters appear
check if STOP is not selected at PICTURE
ADVANCE on the SOUNDER menu.
check for loosened transducer connector.
on SOUNDER SETUP menu, set TRANS-
MISSION POWER to High.
zero line does not appear though the pic-
ture appears
the picture is shifted. Confirm shift setting.
picture sensitivity is too low
check gain setting, if using manual opera-
tion.
marine life or air bubbles may be clinging to
transducer face.
on SOUNDER SETUP menu, set TRANS-
MISSION POWER to High.
the depth indication is not displayed
adjust gain and range to display the bottom
echo in reddish brown, if you are using the
manual operation.
noise or interference shows on the dis-
play
if no noise appears after turning the engine
off, the engine interference is suspected.
Call your dealer.
check the ground.
other video sounder of the same frequency
as yours may be operating near you.
temperature of the water on the water
temperature graph is wrong.
check that sensor cable is tightly fastened.