Lowrance electronic HDS-8M, HDS-10M operation manual Troubleshooting, Unit won’t turn on, 117

Troubleshooting

Troubleshooting

If your unit is not working, or if you need technical help, use the following troubleshooting section before contacting the customer service department.

Unit won’t turn on

1.Check the power cable’s connection at the unit.

2.Make sure the power cable is wired properly. The red wire connects to the positive battery terminal, black to negative or ground.

3.Check the fuse.

4.Measure the battery voltage at the unit’s power connector. You will measure the two biggest pins. It should be at least 10 volts. If it isn’t, the wiring to the unit is defective, the bat- tery terminals or wiring on the terminals are corroded, or the battery needs charging.

Unit freezes, locks up, or operates erratically

1.Electrical noise from the boat’s motor, trolling motor, or an accessory may be interfering with the sonar unit. Rerouting the power and transducer cables away from other electrical wiring on the boat may help. Route the sonar unit’s power cable directly to the battery instead of through a fuse block or ignition switch.

2.Inspect the transducer cable for breaks, cuts, or pinched wires.

3.Check the transducer and power connector. Make sure it’s securely plugged into the unit.

Weak bottom echo, erratic readings or no fish returns

1.Make sure face of the transducer is parallel to the ground.

(Refer to the installation manual for more information.)

2.If the transducer is mounted inside the hull, be sure it is shooting through only one layer of fiberglass, that it is securely bonded to the hull and DOES NOT have air

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