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Furuno FCV-668 - User Manual

Furuno FCV-668
38 pages
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Questions and Answers

  • P
    Patricia SteinAug 13, 2025
    Why is there so much noise or interference on my Furuno Marine Equipment?
    • R
      Richard WarrenAug 13, 2025
      If you're experiencing excessive noise or interference with your Furuno Marine Equipment, consider these steps: * Ensure the transducer or transducer cable isn't too close to the engine. * Verify the unit's ground connection. * Check for other echo sounders operating on the same frequency nearby.
  • E
    Erica MartinAug 16, 2025
    What to do if Furuno Marine Equipment shows signs of low sensitivity?
    • J
      Jean RiveraAug 16, 2025
      If your Furuno Marine Equipment is showing signs of low sensitivity: * Verify that the gain setting is appropriately adjusted. * Inspect the transducer for any air bubbles or marine life attached to it. * Assess the water clarity, as dirty water can affect sensitivity. * Consider the possibility of a soft bottom, which may not return a strong echo.
  • M
    Monica LoganAug 20, 2025
    How to troubleshoot Furuno FCV-668 Marine Equipment when neither echo nor fixed range scale appears?
    • C
      Christopher HermanAug 20, 2025
      If neither the echo nor the fixed range scale is appearing on your Furuno Marine Equipment, you should: 1. Check the battery voltage. 2. Check the fuse. 3. Inspect the battery terminal for any signs of corrosion. 4. Ensure the power cable is securely plugged in.
  • J
    jennifernortonAug 25, 2025
    What to do if no water depth readout is shown on Furuno FCV-668?
    • J
      Jennifer HaysAug 25, 2025
      If your Furuno Marine Equipment isn't displaying the water depth, verify that the bottom echo is painted red or reddish-brown and ensure the bottom is displayed.
  • R
    Rebecca MedinaAug 27, 2025
    Why is the position indication absent or unrealistic on my Furuno FCV-668?
    • D
      doughertyrachelAug 27, 2025
      If the position indication on your Furuno Marine Equipment is absent or unrealistic, check that the sensor plug is securely fastened and verify the position-fixing equipment.
  • J
    Joseph JimenezSep 1, 2025
    What to do if Furuno FCV-668 Marine Equipment shows range scale but no echo?
    • B
      Bill PattonSep 1, 2025
      If your Furuno Marine Equipment shows the range scale but no echo, check that the display speed is not set to "0" and ensure the transducer plug is firmly connected.
  • P
    Patrick JacksonSep 4, 2025
    Why is the speed/water temperature indication absent or unrealistic on my Furuno Marine Equipment?
    • E
      Eric OnealSep 4, 2025
      If the speed or water temperature indication on your Furuno Marine Equipment is absent or unrealistic, ensure that the sensor plug is securely fastened.
  • R
    Renee VaughnSep 8, 2025
    How to fix echo when it appears but no zero line on Furuno FCV-668 Marine Equipment?
    • M
      Mrs. Emma OrtegaSep 8, 2025
      If the echo appears but there is no zero line on your Furuno Marine Equipment, check if range shifting is set to "0."

Summary

Safety Instructions

General Warnings

Covers electrical shock, opening equipment, liquid containers, smoke, fire, and water splash hazards.

Cautions and Warning Labels

Details on warning labels and precautions to avoid electrical shock.

Principle of Operation

Controls and Indications

Basic Operation

Menu Operation

Instructions for navigating the main and system menus.

Interpreting the Display

Maintenance and Troubleshooting

Maintenance Procedures

Covers general checking, fuse replacement, cleaning, and transducer maintenance.

Cleaning and Transducer Care

Instructions for cleaning the unit and maintaining the transducer.

Basic Troubleshooting Guide

Provides solutions for common problems like no echo, low sensitivity, or noise.

Diagnostics and Self-Tests

Details on running diagnostic self-tests for devices and controls.

Furuno FCV-668 Specifications

General IconGeneral
Resolution640 x 480 pixels
Frequency50/200 kHz
Power Output600W
Transmit Power600W
Operating Temperature-15°C to +55°C
CategoryFish Finder
Display TypeColor LCD
Beam Angle45° / 12°
Operating Voltage12-24 VDC

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