Question about JBL PSW-D110 Speaker

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My JBL PSW-D110 started humming loud... The fuse is fine and the power LED displays is illuminated in green. However the sound is unbearable... It would like to replace the entire IC panel if its most cost effective. I contacted JBL online and they have no authorized service center in my area.  Based on the description below does anyone have any idea where to start as I don't have the schematic? Any help would be appreciated. Thanks. MARK

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  • jsa386 Nov 10, 2008

    Real loud humming noise on my JBL psw-d110 and have to unplug power

  • rosabear Jan 31, 2009

    I have a constant loud hum coming from my subwoofer.  I would like to repair it however, need some guidance as I have never done anything like this before or should I take it into a generic repair shop.  Is it smarter and cheaper to fix or just replace with a new one?


    Thanks for the assistance


    G

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  • Master
  • 1,512 Answers

Hi calsunbelt

there are some caps that fail in the power supply. If you are up to doing some electronic repairs, I could talk you through it and tell you what parts to check.

regards
robotek

Posted on Jun 19, 2008

  • Brian Carman
    Brian Carman Jan 27, 2013

    Hi Graeme I am a technician and would like help fixing the hum coming from my DPS-10 Velodyne subwoofer.

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1 Answer

Hi, Here's the problem with my PSW-D110. When I plug in the power cord I get a loud humming sound and the speaker thumps every couple of seconds. Anyone know what the problem may be. Thanks, Tim


I would say it's a case of bad filter capacitors in the power supply. Without the capacitors, the AC power line doesn't get smoothed out enough when converted to DC by the supply, and you hear the hum that gets through. I have never worked on on one of these so I can't tell you how to open the case to get at the supply. It's not always a simple job. But if you can get at those caps and check them, you'll probably find them at fault. It's not a difficult job to remove and replace bad capacitors if you are comfortable using a soldering iron. Just make sure that replacement parts have at least the same voltage voltage rating and capacitance values as the originals. It never hurts to go higher by a little, but not lower.

Feb 24, 2011 | JBL PSW-D110 Speaker

1 Answer

No output from d110


You can use a cap of same or bigger voltage,

Oct 17, 2008 | JBL PSW-D110 Speaker

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JLB PSW-D110 Subwoofer Issues


Hi,
Hummmm is from Output amplifier and you need to replace it because power supply blow it too.

Sep 09, 2008 | JBL PSW-D110 Speaker

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here is the manual, I am looking for a more detailed version

Mar 25, 2008 | JBL PSW-D110 Speaker

1 Answer

JBL d110 /w no sound output


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.

Jun 17, 2008 | JBL PSW-D110 Speaker

1 Answer

No output from d110


Hi Chadwik

The fact that you do get hum when you partially remove one of the RCA's would tend to say that the output stages are working ok. Is the hum "solid" and bassy, or distorted?

There are a few issues that these subs have had, mostly to do with capacitors in the power supply failing. If you are up to it, I can talk you through repairs to it.

regards
robotek

Jun 16, 2008 | JBL PSW-D110 Speaker

1 Answer

JBL PSW-D110 Humming Loud


If I remember these correctly, there is a bad coupling cap in the amp section. You should see it as the top should have ballooned up. Replace the cap and you should be OK.
Dan

Mar 25, 2008 | JBL PSW-D110 Speaker

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