Question about Onkyo SKW-200 Subwoofer

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Subwoofer issues It keeps blowing the 2 little fuses everytime i plug it in the wall. I bought 2 new fuses, and noticed that the speaker buzzes for about 5 seconds and then blows the fuses. And the circuit board smokes just a tad bit everytime i plug it back in with a little higher fuse. Its only a couple of years old and i dont hardly ever use it......

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  • technology1 Feb 23, 2008

    I think your right........

    I did already have it apart and i know exactly where the smoke is coming from, but i have no idea what it would be called. What i did was put in higher fuse ratings, so that it would not blow real fast, and as soon as it starts to smoke, i quickly unplug it.....Im not sure if you can post pics on here or not, as i am new here.........The best way to describe it i guess, would be that it looks like a thin hard piece of candy that is glossy looking....lol

    Here's a link, if it works.....I'm pointing at the spot where it smokes from with my OHM meter.....
    http://i95.photobucket.com/albums/l124/B...

  • technology1 Feb 23, 2008

    http://i95.photobucket.com/albums/l124/B...

    Not sure if u can get this or not. Im point at where it smokes from

  • technology1 Feb 23, 2008

    Okay, thanx for the tips...I'll get back to you tomorrow.......

  • technology1 Feb 23, 2008

    http://i95.photobucket.com/albums/l124/B...

    When i clicked the 2nd icon and picked a picture, it sat there for like 3 or 4 minutes while waiting for the hour glass, so i just did it the same way as before

    Here is the latest photo, i just took, to give u a picture of what is exactly heating up. It's the little black square thing. After u plug it in, 2 seconds later it starts to glow hot orange and then i immediately unplugged it. It looks like i may just buy another one, but its a shame, since it was hardly used.. In your opinion, who makes a good quality sub? I thought Onkyo was a pretty good brand....

  • technology1 Feb 24, 2008

    Okay, thanks for all your help. I think i will just go get another one and be done with it. I think this time i will try a Polk brand. I did take the subwoofer out and hooked it up to a different stereo, and it sounded fine, so i guess i will just keep the subwoofer itself and junk the rest of it....lol I am surprised that the subwoofer says 4 ohms on the back of it, because i always thought that home speakers were 8 ohms........Again, thanks for all your input....James

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I have the Onkyo SKW-200 and the fuses are blowing also. Plug it in and the fuses blow instantly. My brother has the same sub and the same thing happened. Our subs only worked for about 1 month before they went out. Do you think it is the power supply?

Posted on Nov 20, 2008

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Hi,

The fuse blows when the current that passes through it are beyond its rating. This could be brought about by excessive consumption of the load, in this case the amplifier powering the sub-woofer.

Repairs would involve component level and require that you be familiar with electronic components and circuitry, use of a DVM and a soldering iron. Often it is just the finals that needs to be replaced. Of course we cannot discount the possibility of other components or section such as the power supply.

The smoke indicates something heating up such as a resistor or diode or a capacitor.

Should you be uncomfortable opening the unit and doing a DIY (do-it-yourself), then perhaps you need to seek the services of a qualified professional.

Should the downtime and cost of repair be no longer economically reasonable, purchase of a new unit might save you further trouble.

Hope 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 Feb 23, 2008

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  • Louie  Role
    Louie Role Feb 23, 2008

    Hi again,

    Appreciate the postback/update as well as the image. And yes I was able to view the picture.

    You can Add a video or photo to your post by clicking the "Insert Image" icon 2nd top left of the "Add a Comment" box.

    The black test prod is pointed to what appears to be a power pack IC. May I suggest that you remove it so as to be able to get the component number. It would be something like TA 12345 or HA 9876. Shouldn't be that expensive and based on the photo only a couple of pins to be desoldered and re-soldered.

    May I further suggest that you refrain from further testing since:
    1. the sub-woofer coils might get burned; and
    2. the component might get burned so much you won't be able to read the numbers.

    In the event that you have the burned component replaced, pls check likewise the coil of the subwoofer, it should read something like 4~8 ohms.

    Would appreciate if you can keep us updated.

    Cheers.

  • Louie  Role
    Louie Role Feb 24, 2008

    Was able to view your second image and can see the scorched mark. Looks like a uPC or a TDA IC.

    The "Insert Image" feature would only allow 150kb picture file size, I guess your image must be slightly over the limit (222kb?). No prob, your image link still work.

    Power pack ICs going bad is not uncommon. They can be caused by:
    1. defects in the speaker or the speaker wiring;
    2. continuous too high volume/level setting;
    3. humidity, ambient temperature, power spikes/surges and even powering off/on with signal input;
    4. heat buildup (continuous usage);
    5. inherent factory weakness/defect.

    Most big name manufactures are really good "subs", Onkyo being one. If you will notice, the defective component was manufactured by another company that Onkyo uses as part of its overall product. It just so happen that this particular part (which happens to be the major component) died ahead of the others.

    Again, may I suggest that you check the speaker/sub. Often when power packs die, the speaker(s) get toasted as well.

  • Louie  Role
    Louie Role Feb 25, 2008

    and hello again James,

    As you will note, I did initially suggest "purchase of a new unit might save you further trouble" and Polk Audio is a good brand.

    A request if I may, you posted "junk the rest of it", would you consider donating the "rest of it" to a university in my country? It would be a great teaching aid in educating my students to further their knowledge on electronics. Of course shipping & freight would be to my account if reasonable.

    Glad to be of some assistance and would appreciate if you can rate the solutions posted.

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