Question about Kenwood SW-38HT Subwoofer

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Woofer will not turn on. fuse was bad but i replaced it and still no power.

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Had the same problem, no power from the sub, no light. Opened the box, fuse was bad, replaced the fuse...pop...blew again. Found out that on the bigger middle board next to the power plug there are two capacitors on either side, the inner one burned and crumbled to pieces. I called Kenwood, they said that I would have to bring it to a Electronic Service Specialist that they will give you a number to in your area...or...Ship it yourself to their East Coast Center in Virginia. I already asked if Kenwood is going to send an RMA or Shipping Label and they will not. You will be responsible for the shipping there, but they will pay for the shipping back. Kenwood's East Coast Center in Virginia's number: 757-340-1702 - Good luck

Posted on Jul 08, 2009

  • rbatten3
    rbatten3 May 09, 2017

    Thank you sup9042, I called the number you gave me and Amateur support gave me an answer right away. His name was Leo and he told me to push the button marked sub on the bottom right front of radio. When I pushed it, the display came back on. Thanks again.........Bob K4LOA in Inverness Florida

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Socket the power cord and check if there is supply around the capacitors that supply the circuit board

Posted on Feb 10, 2009

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2 Answers

Sub woofer not turning on


Is it receiving power? If not that is your answer - could be a blown fuse, bad wire, bad connection, etc.

If power is there and it still does not work then the problem coud be with a bad sub woofer on/off switch, internal fuse, or worse, blown amp from over driving.

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Woofer not powering on


Check the power unit inside woofer, it was cause for same problem in my creative surround.

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No power on my JVC Kaboom


I would rule out the power supply simply because the batteries won't run it either. The internal plug that takes the cord should be checked for cracked solder joints, because the plug goes to battery mode when cord is removed and AC fuction when cord is plugged in. It is possible it may be an audio output problem given the age of the item.

Feb 12, 2012 | JVC KABOOM RV-NB10 Boombox

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To Mr. Hyde: you appear experienced with Bose 501 Series III speakers. I need to replace a burned out glass bulb fuse inside the right speaker, the fuse for the woofer I believe. I think that you said that...


Hello whit_hughes,

Just received your request for some information regarding Bose 501's......... Series III. Your looking for te manufacturers part # for the fuse which is in line with the woofer? The fuses used ON the Series III Crossovers (hard wired/soldered directly to crossover board/componants) have been Identified as BUSS #2494, 2amp, Quick-Blow Glass Tube Type Fuses. The fuse which is in-series with the woofer & the fuse which is in-series with the pair of tweeters are the same! In theory this means that the woofer is capable of twice the wattage of the tweeters due to the tweeters being wired in series with each other..... which in turn divides the power beween the two equaly. On the woofer circuit there is only the one speaker or voice coil obsorbing the power. The woofer circuit being wired in parallel with the tweeter circuit again splits the power between the two cuircuits..... so in an ideal situation the woofer sees 50% total input power while the tweeters each see 25% total input power;;;; totaling 100% total. The way Bose has fused them in the Series III's is such that each branch can obsorb a total of 2 amps before shutting down each indivigual branch. This can be adventageous..... should peak power be exceeded causing loss of full load abruptly, Amplifier Power Output Transistors usually blow..... however when only half of the full cuircuit shuts down due to peak power exeeding limits causing one fuse to open (blow) ... the actual impedance (resistance) of the speaker increases protecting the Amplifiers Output Transistors! Thats the reason for the 2 fuses. Each of them are identical. They are soldered into place.... via the wire which is attached to each end of the fuse. (Note; the fuse "kit" Bose is trying to sell you is an external in line fuse holder for each speaker {costing 1.29 each} & 2 fuses for each holder, One for now & One for Later aftr it blows {costing 1.00 each}..... costing Bose 6.58, neting Bose $13.42 Profit!!!! Keep in mind that this fuse WILL NOT FIX YOUR PROBLEM EITHER! DUE TO THE FUSE WHICH IS PRESENTLY BLOWN HAS NOT BEEN REPLACED!!!!! ) The one that has to be replaced is on the crossover... not between the Amplifier & the Speaker Enclosure. Tools required = 1 Long Big Straight Blade Screwdriver to pry off speaker grill, 1 Phyllips Screwdriver to remove screws seccuring woofer to encloser... be carefull not to damage/tear gasket, 1 pair side cutters to cut blown fuse out of crossover curcuit, 1 pair needle nose pliers to attach NEW fuse to crossover curcuit, 1 soldering Iron & a small piece of solder to re-solder fuses leads securly to crossover curcuit. ( replace gasket, woofer, screws, & speaker grill. ENJOY! Should additionaL informaton be required please let me know.... you'll have to leave me your e-mail address for pictures or drawings.... as I don't think they can be sent through this site. Hope this helps ya..... Its an EASY JOB...... you CAN DO IT! & will be glad you did when your done, they'll sound GREAT! ) GOOD LUCK!

Jun 22, 2011 | Audio Players & Recorders

1 Answer

Can`t power it up. Connections and fuse OK. Stopped working after switching off and would never switch back on. LED indicator light`s neither green nor red but simply off.


Hi,
First, I have to commend you for having a really fine piece of equipment. Mission makes great products. Now down to business. Being where I am and not being next to your sub-woofer with test instruments and tools I'm going to be so basic as to almost be insulting. However, If I were there, I would be testing these things.
Normally, when one has a catastrophic failure. i.e. no power, and no indication of power present one starts with the power supply. And that starts at the power company.
1st Determine if there is power in the actual outlet that the unit is plugged into. I have found that when installing a sub-woofer on a two plug wall outlet, for example, it might be plugged into a plug intended for a floor lamp. and is turned on and off by a wall switch. Many residences have this feature. It is usually one of the two plugs in an outlet. So you have to test the actual physical outlet. If the outlet is off, check the light switches. If there is no power to the outlet, check the household circuit breaker.
Let's assume that everything works, so far.
The next thing to do is check the internal fuse with a meter. If you don't have one, pick up a multimeter from Radio Shack or Walmart for less than $20.00 or Harbor Freight for less than $7.00
If the fuse looks good but checks out bad (sometime happens) replace it with A FUSE OF THE SAME VALUE. DON'T STICK IN A PIECE OF ALUMINUM FOIL OR BYPASS THE FUNCTION AND PURPOSE OF THE FUSE. The fuse costs a dollar, at the most, the Sub-Woofer costs $800.00 at the most.
OK, so now you have either a working sub-woofer, or an elegant paper weight.
If it is still being a paper weight, contact mission to locate an authorized service company. This piece of equipment in not designed to be user servicable
Here is their link below,
I hope this helps,
Best Regards,
Mark
http://www.mission.co.uk/Default.aspx?lang=En

Jan 20, 2011 | Mission M5AS Subwoofer

2 Answers

Unit blew the internal fuse. SONY SA-WMS367 SUB-WOOFER


Bad output IC or voltage rectifier are the most likely at fault.

Nov 28, 2009 | Sony SA-WX700 Subwoofer

1 Answer

Klh powered subwoofer keeps blowing fuses?


then the circuits took a hit and the fuse didn't do it's job in the 1st place. best is too get new circuit thats inside the sub woofer.

sorry to be the bearer of bad news

Apr 26, 2009 | KLH BB-II Subwoofer

1 Answer

Could a ground stop your woofer from working?


First check the speaker wire from the amp to the sub, see if it's connected right. Second check the rca cables that goes from your amp to the back of the deck. I f both wires are still connected fine try to replace the rca cables. If it still doesn't work the rear out put at the back of your deck, where the rca's are connected are bad. FYI deck is bad.

Nov 29, 2008 | Jl Audio 12W3 Car Subwoofer

1 Answer

Need to repair my HKTS 14 Harman Kardon Subwoofer


Since this is a power sub woofer, it may have an amplifier problem that would require professional service. Yoiu can start by checking the fuse. Make sure the sub woofer is not plugged into the wall when you check it. Some of these powered sub woofers have the fuse right on the panel where the cord goes into. It may have a round cap and you turn it and pull the fuse out. If the fuse is blackend or you can see that the filiment inside the fuse it broken, you can replace the fuse with the same rating of fuse. The rating is on the metal tab at one end of the fuse or may also be listed right next to the cap for the fuse holder. If the fuse is not accesable from the panel, you need to remove panel and look for it where the power cord comes into the panel. It will be right in line with the power cord. The panel for most sub woofers are normally held on by screws all the way around the panel. You should only need to take the outside screws (around the edge of panel) off of the panel. The inside screws hold on the circuit boards, connectorsm and transformer.

If you had given more information about the problem with your sub woofer I could have given you a better answer, but with the limited information given all I can suggest right now is to check the fuse. That is always a good starting point. If you give me more information I may be able to help you much more, I have repaired many powered sub woofers but not this model. Most are very similar and can be checked with minimal effort. You would need to have a multimeter to check almost everything else with the sub woofer. Let me know if you have a multimeter and are willing to check it further. Anything less than a "FixYa!" rating is really not a good rating, so please do not rate this solution until we have had a chance to communicate more about the problem. That way I will not be given a bad rating when I have not had a chance to actually help you yet since I can not tell you how to fix your problem without more information.

Dave

Oct 14, 2008 | Audio Players & Recorders

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