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bill ebert Posted on Mar 16, 2007
Answered by a Fixya Expert

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No Sound - boat stereo

My boat's system consists of: 1) Kenwood KDC-2019 AM/FM/CD Tuner 2) Kenwood KDC-C??? 6 CD Auto Changer 3) Kenwood KAC-749S Amp Suddenly no sound thru Speakers (4). Tuner head is getting power and appears to "tune" and play CD (haven't tried the 6 CD Changer). The Amp has an external (flat) fuse that I pulled and it look "OK". There is also a small remote mounted on the back end of the boat. No hand-held remote. Can't get anyone to come to storage to work on it. Any suggestions before I stumble thru pulling the units and taking them "somewhere" to have them looked at? Thank you.

  • 1 more comment 
  • bill ebert Mar 16, 2007

    Thank you for the quick response. The boat is in a storage unit, away from my location, but I'll head over that way and look for a "power lite".

    Yesterday when I was fooling around I don't remember seeing any power lite on the Amp "on". The unit, however, is mounted inside a smallish, cramped cabinet that I've got to "crawl" into in order to see the unit face-on (where the lite is located). I'll post what I see (or don't see) this evening.

    I didn't check for a fuse at the battery, but will.

    Question: Would the wire carrying the power to this set-up be right at the battery or would it be somewhere along some sort of "harness"? (I see on the Amps very basic wiring diagram that the fuse is located near the battery, but..) And, would that fuse be "only" for the Amp (and not also the Tuner & CD Changer)? I know that's a hard question to answer without seeing the set-up but perhaps you could relate what's "normal".

    Oh, the 1 page "instruction manual" for the Amp shows the location of the power lite.

    Question: if there's no power lite "on" then I would presume the problem would be with the Amp or one of it's fuses, correct? Thanks once again.

  • bill ebert Mar 17, 2007

    Thanks all. I've replaced the Amp and the world is good again ;-)

  • Anonymous Mar 19, 2014

    kenwood amp


1 Answer

Brian Neathery

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  • Posted on Mar 16, 2007
Brian Neathery
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Assuming that the four speakers are connected to the amplifier, then the amp is the most likely problem component. Does the amplifier show a power light when the system is turned on? Note that there is probably another fuse in the amplifier power wire, near the battery.

  • Brian Neathery
    Brian Neathery Mar 17, 2007

    Typically, the amplifier would have its own power wire direct to the battery, and the radio/CD player would be wired to the switch panel area, but a boat is always a custom installation and there's no telling for certain how it was done. There's probably a ground wire present at the battery too.

    The easiest way to troubleshoot would be with a digital multimeter or voltmeter. Your amp has a main power terminal, a "remote" terminal, and ground terminal; for it to turn on there needs to be 12 volts present on the main power and remote terminals. If you find voltage on those terminals and the amp doesn't turn on, you probably have a defective amp.

    If you do have a power light at the amp, but still have no sound, I'd check the wires at each speaker. A shorted speaker wire can put the amp into a "protect" mode so that none of the speakers will play. However, in a boat the only thing a loose terminal wire could short against would be the other terminal on the speaker.


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