Troubleshooting - Furuno FCV-1200L Operator's Manual

5.3

Troubleshooting

This section provides simple troubleshooting procedures which the user may follow to restore
normal operation.
there are no echoes but the scale appears
there is no zero line or zero line is not in correct
position
you suspect low sensitivity
the bottom is traced in zigzag pattern or you
experience occassional loss of echo
there is no depth readout
automatic shift is inoperative
picture is distorted
color is strange in a given area
occasional noise is seen
there is noise and interference
If... Then...
check if the transducer is properly connected.
check if the range shifted. (Zero line does not
appear when the range is shifted.)
press the [-] key so as the scale appears from
0.
check that gain control is properly set.
the sea may be rough. Bottom is traced zigzag
when the sea is rough.
own boat may have passed over other boat's
wake, which blocks propagation of sound wave.
check to see if bottom is present on the normal
picture range.
check if bottom echo is strong enough (red,
reddish brown in color).
check if bottom echo is strong enough (red,
reddish brown in color)
check if magnetic field generating equipment
(transformer, rectifier) are nearby.
check if a magnet is near the equipment.
check if the cables of pulse generating
equipment are near the equipment.
check that GAIN and CLUTTER properly
adjusted.
check the setting of the noise limiter.
check the equipment's ground.
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