Sonar Troubleshooting - Eagle SUPRAPRO I.D. Installation And Operation Instructions Manual

Most bait fish concentrate within five feet of the surface where sunlight
promotes the growth of the plankton on which they feed. One method of
fishing is to use the SupraPro I.D. to find the bait fish first. With the Fish
ID feature off, a school of bait fish will look like a "cloud" on the display.
Usually, game fish will be nearby, often directly beneath the school of
bait fish.

SONAR TROUBLESHOOTING

If your unit is not working, or if you need technical help, please use the
following troubleshooting section before contacting the factory customer
service department. It may save you the trouble of returning your unit.
Unit won't turn on:
1. Check the power cable's connection at the unit. Also check the wiring.
2. Make certain 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. It should be at least
11 volts. If it isn't, the wiring to the unit is defective, the battery 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. Re-routing 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 certain it's securely
plugged in to the unit.
Weak bottom echo, digital readings erratic, or no fish signals:
1. Make certain transducer is pointing straight down. Clean the face of the
transducer. Oil, dirt, and fuel can cause a film to form on the transducer,
reducing its effectiveness. If the transducer is mounted inside the hull, be sure
it is shooting through only one layer of fiberglass and that it is securely bonded
to the hull. Do NOT use RTV silicone rubber adhesive or Marinetex
2. Electrical noise from the boat's motor can interfere with the sonar. This
causes the sonar to automatically increase its Discrimination or noise
rejection feature. This can cause the unit to eliminate weaker signals such as
fish or even structure from the display.
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