will change to the factory defaults. See the default settings on page 82.
2.If the power wiring includes a fuse, it may be blown. Also check the circuit breaker or main battery switch.
3.You may have reversed the power connections. Follow the DC power lines all the way back to the battery. The red wire should connect to the positive terminal (+) on the battery or power source, and the black wire should connect to the negative terminal
4.The battery or DC power source may not be producing the correct voltage. The FishFinder needs at least 10.8 volts to operate. If the voltage is lower, check for loose or corroded connections, or a problem with the power source.
The display unit “freezes” (temporarily or permanently) –
1.Check that the display has not been stopped using the Chart Speed Menu Item. (If the adjustment bar is moved all of the way to the left, the display will freeze.)
2.A source of electrical “noise” may be interfering with the unit’s operation. Both the transducer cable and the power cable for the FishFinder should be routed as far as possible from all other wiring on the boat.
To locate the source of the noise, turn on the FishFinder. Next, turn on each electrical device on the boat, but just supply power to one device at a time. This may reveal the cause of the problem. Move the FishFinder, the other unit, or the wiring. A movement of just a few inches can make a big difference. If it is necessary to cross any wires, make the crossing at a right angle.
Start the motor in neutral and increase the RPM speed. This can reveal a problem with the wiring for the boat’s ignition, alternator, or tachometer. It may help to use
3.One of the wiring connections may be loose. All of the connections should be clean, tight, and insulated. Soldering is the best way of making these connections. Protect each connection with a piece of
84 | Maintenance and Troubleshooting |