Question about Kenwood SW-303 Speaker

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Always turns to standby

I have had this sub for quite sometime without any problems at all.  Recently when i turn my receiver on the light that is normally green on the back indicating it is on goes red for 'standby' and the sub will not work.  How do i fix this?

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Hi, I was able to take care of this issue by talking to Onkyo tech support. They diagnosed over the phone and concluded that the receiver set the volume for the sub way too low (-12), therefore sub was not receiving the input and was doing what it was supposed to be doing. They walked me through manually increasing the volume and now everything works great.  Good luck! I hope this helps.

Posted on Apr 13, 2008

  • dadara Apr 14, 2008

    I doubted this theory too. When I asked in the electronic stores people that should know these things all told me that it is a bad subwoofer and that I should return it. One other thing that the Onkyo support tech told me was to try and restore settings to factory default on my receiver, and then do the auto setup again, but we were able to identify the speaker volume issue before we got to that step. One other thing that crosses my mind is to try connecting your sub to some other receiver just to make sure that it is the subwoofer that is at fault.....

    Good luck!

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The best thing to try is a factory reset of the Onkyo. The subwoofer out may be stuck off, even if the settings say its on.

hold down the Video 1 and Power on/ Standby buttons. The display should say Clear, then enter standby

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http://www.pioneerprodj.eu/eur/products/42/99/S-21W/media.html

Flashing Blue is not defined in the manual.

Have you tried changing the Auto Standby switch to ON?

You can prove if the sub amp will respond to a known good input by TURNING ITS VOLUME DOWN tp start and just feeding it ANY RCA output from the receiver while playing, say, FM (to keep it simple). That way you would known in which direction the problem actually lies (internal or external).

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It is basically an indicator that there is potential life in the unit. If it ever truly turns OFF, that is a problem.

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henrylshelt,
Your sub should turn on into standby mode when plugged into AC power without being attached to the receiver. If it does not follow the list below. If it does, the sub needs a signal from your receiver via either by line-level (RCA) or the speaker wires to turn on out of standby. Ensure that the cable or wires going to your sub is in fact sending a signal while the receiver is on. To Test, (speaker wires) hook up a different known working speaker; (line-level) Some receivers have a menu option to turn the LFE output on and off, ensure that it is on and producing a signal.

Diagnose the problem:
1) Remove all wiring to/from the unit except for the AC plug (use a different known working AC outlet), will it turn on? If so the other outlet is not working.
2) Remove the woofer, does the amp have a fuse that need to be changed? Change the fuse. If it blows again after replacing and turning back on, the speaker is blown; go to #4.
3) Unplug the woofer from the amp, does it turn on? If so, go to #4.
4) The sub need to be serviced. http://www.jbl.com/EN-US/Support/Pages/SupportOverView.aspx

-Hope this helps, Chris.

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Have you looked in the manual?

No sound from subwoofer. • Make sure the subwoofer is switched on.
• If the subwoofer has a volume knob, make sure it’s turned up.
• The Dolby Digital or DTS source you are listening to may not have an LFE channel.
• Switch the subwoofer setting in Speaker Setting on page 40 to YES or PLUS.
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There is a standby indication that activates after 10-15 minutes without any input signal. I suspect that might be what the red light is telling you - no signal.

Loud hum from a loosened cable is normal as hum usually means there's an ungrounded connection somewhere acting as an antenna and the amp is doing its job to amplify what it thinks is a signal, in this case 60hz stray ac current is being sensed nearby. It's a good sign that you get hum from the sub because that means the amp is alive.

Avoid manipulating cable connections with the Sub or Receiver turned on as you could introduce a static spike that could harm any connected equipment.

Are you certain a bass signal is making it into the sub? The complexities of modern AV receivers vary in how you configure them to direct LFE to a sub. Bone up on that end of the chain.

Or, just hang a CD player on the Inputs of the sub and play something with a reassonable amount of Low Frequencies.

>>>> Be advised that this way of testing has NO VOLUME CONTROL because amps without volume controls always operate at maximum gain, relying on your external controls to attentuate it (hence, the loud hum from a loose cable); so choose a track that eases into the loud parts with some quiet parts up front and BE READY TO PAUSE THE PROGRAM AT ANY SIGNS OF STRESS. <<<<

A living sub will produce only muffled rumble in the absence of other speakers producing the higher frequencies which carry the intelligence of the signal. If that works, back to the receiver for settings. If not... sigh.

-----

For hum problems, even those you cause yourself:

Disconnect all inputs to see if that helps. If it goes away start with the signal cables and add in things until it comes back.

Sometimes the reversing the orientation of the AC plug can help with hum. Or it could be something like a loose or high resistance connection internal to the sub. Good luck.

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1 Answer

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Speaker wire contact with each other is the problem. Check the back of ALL SIX speakers including sub-woofer. You should find wires contacting each other. Fix that and your problem will be solved.

Barry Scholles
Strasburg, OH

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