Basic Troubleshooting.5-2 - Furuno 1751 Operator's Manual

5. TROUBLESHOOTING
Basic Troubløshooting
Basic Troubleshooting
In most cases when the unit fails to operate properly the cause is very simple. Before calling
for service or sending out the unit for repairs, check the following,
1) Nothing appears on screen, (Check that the &ont panel is illuminated. If it is not« check
the following.)
• Is the battery dead?
• Is the fuse blown?
• Supply voltage is normal?
• Corroded battery terminals?
• Poor contact of power cable?
2) No echo but numerical and character indications.
• Is the antenna plug loose?
3) Low sensitivity.
• Is the GAIN too low?
• Is the A/C SEA too high?
• Is the FTC ON?
• Is the brilliance too low?
• Is the surface of the radiator dirty?
4) Noise on screen.
• Is the unit grounded?
5) Sweep not rotating.
• Is the antenna plug loose?
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