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Humminbird fishfinder keeps blowing 5v fuses .Power ok to base but as soon as you attach fishfinder fuse blows

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Hi,

Most probable component that has gone bad and capable of blowing the 5V fuse would be:

  • voltage regulator IV or transistor;
  • reverse protection diode;
  • zener diode;
  • shorted capacitor.
As the 5VDC normally supplies the logic circuitry, perhaps diagnosis and tests should be focused within that area.

Hope that this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Oct 24, 2008

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Posted on Jan 02, 2017

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