19
4. When in very shallow water, I get gaps in the bottom reading
and inconsistent digital depth indication.
The
128
will work reliably in water 3' or deeper. The depth is measured
from the transducer, not necessarily from the surface.
5. The unit comes on before I press POWER, and won’t turn off.
Check the transducer cable—if the outer jacket of the cable has been cut
and the cable is in contact with bare metal, you need to repair the cut
with electrical tape. If there is no problem with the cable, disconnect the
transducer from the unit and see if the problem is corrected, to confirm
the source of the problem.
6. I get gaps in the reading at high speeds.
Your transducer needs adjusting. If the transducer is transom-mounted,
there are two adjustments available to you—height, and running angle.
Make small adjustments and run the boat at high speeds to determine
the effect. It may take several tries to optimize high speed operation. This
can also be a result of air or turbulence in the transducer location caused
by rivets, ribs, etc.
7. My unit loses power at high speeds.
Your
128
has over-voltage protection that turns the unit off when input
voltage exceeds 20 VDC. Some outboard motors do not effectively
regulate the power output of the engine’s alternator and can produce
voltage in excess of 20 volts when running at high RPMs. Check the
input voltage with a volt meter while operating the engine at various
speeds to confirm input voltages.
8. The screen begins to fade out. Images are not as sharp as
normal.
The
128
will not operate on input voltages below 10 VDC. Check the
input voltage at lower engine speeds for under voltage.
MAINTENANCE AND WARRANTY
TROUBLESHOOTING
Summary of Contents for TFX128
Page 1: ...TFX1 28 Operations Manual...
Page 26: ......
