Lowrance HDS-5m Gen2 HDS 5m 7m Operation Manual - Page 97

Troubleshooting

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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 the transducer is pointing straight down like the following image. 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 95

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95
Troubleshooting
If your unit is not working, or if you need technical help, use the following
troubleshooting section before contacting the customer service department.
Check the power cable’s connection at the unit.
1.
Make sure the power cable is wired properly. The red wire
2.
connects to the positive battery terminal, black to negative
or ground.
Check the fuse.
3.
Measure the battery voltage at the unit’s power connector.
4.
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.
Electrical noise from the boat’s motor, trolling motor, or an
1.
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.
Inspect the transducer cable for breaks, cuts, or pinched
2.
wires.
Check the transducer and power connector. Make sure it’s
3.
securely plugged into the unit.
Make sure the transducer is pointing straight down like the
1.
following image.
If the transducer is mounted inside the hull, be sure it is
2.
shooting through only one layer of fiberglass, that it is
securely bonded to the hull and DOES NOT have air
Troubleshooting
Unit won’t turn on
Unit freezes, locks up, or operates erratically
Weak bottom echo, erratic readings or no fish returns