4.5 Troubleshooting
The table below provides simple troubleshooting procedures which you may follow to restore normal operation. If you cannot restore normal operation, contact your dealer.
Table 4-2 Troubleshooting
If... | Then check... |
|
|
neither echo nor fixed range scale | • battery voltage. |
appears | • fuse. |
| • power supply. |
| • power cable. |
|
|
no echo appears but fixed range | • if display advance speed is set to STOP . |
scale appears | • transducer plug. |
|
|
echo appears but no zero line | • if range shifting is set t o 0. |
|
|
sensitivity is low | • gain setting. |
| • if air bubbles are present or marine life is stuck to |
| the transducer. |
| • if water is dirty. |
| • if bottom is too soft to return an echo. |
|
|
there is extreme interference or | • if transducer or cable is close to engine. |
noise | • if unit is properly grounded. |
| • if other echo sounders of the same frequency as own |
| are being operated nearby. |
|
|
there is no or unrealistic | • sensor plug. |
speed/temperature readout |
|
|
|
there is no or unrealistic ship's | • connection between sounder and navigator. |
position readout | • navigator itself. |
|
|
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