tions for the System Setup Menu.
2.The FishFinder will not display arches unless the boat is moving. If the boat is stopped, fish will appear on the display as straight lines.
3.The transducer may not be aimed straight down. In order to display complete arches, the transducer must be vertical.
4.The sensitivity setting may not be high enough. Go to the Setup Menu, choose Manual Sensitivity, and increase the sensitivity.
The display disappears or is unreliable when the boat is moving at high speeds –
1.Increased turbulence around the transducer may be “confusing” the unit. Move the transducer to a location where there is less turbulence when the boat is moving.
2.If the FishFinder is using the Auto Sensitivity setting, it may be reacting to an increase in electrical “noise.” As the level of noise increases, the sensitivity automatically adjusts, and the unit can lose its ability to see the bottom or fish. Check for problems with the wiring as described in the section on “The display unit freezes.”
The display unit shows lots of background “noise” –
1.The unit may be set to use the manual sensitivity adjustment, and the sensitivity may be set too high. See the information on “Setup Instructions.”
2.The transducer may be mounted incorrectly, or may be fouled. Check the mounting as described in Section 2. Clean the transducer as described earlier in this section.
The depth setting flashes often –
Note: Normally, this indicates that the bottom has moved out of range.
1.The transducer may not be installed correctly, or the signal may not be reaching the display unit. Recheck the instructions in “Mounting the Transducer” in Section 2. Check the transducer cable for signs of damage. If the cable is damaged, the transducer and cable should be replaced as a unit.
2.The voltage reaching the unit may be low, and this may be affecting the transmitting power. Check for problems with the wiring as described in the section on “The display unit freezes.”
86 | Maintenance and Troubleshooting |