Question about KLH ASW10-120 Subwoofer

1 Answer

Hum no audio output - KLH ASW10-120 Subwoofer

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 547 Answers

There are a lot of folks who've had power supply issues with this sub. Typically, the large resistors fail, which takes out the capacitors.

If you know how to read schematics and replace parts, then these might be helpful to you:

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board

Posted on Dec 22, 2009

  • 1 more comment 
  • Brian Oliver May 09, 2012

    I just had this problem occur on my ASW 10-120 a few days ago, and I guessed it was one of the power supply caps (6800 uF). I replaced both caps and a couple of other nearby ones and the loud hum has gone away, but it still has an offset on the speaker output (~1 volt). Unfortunately, the schematic you posted doesn't appear to be the same as my unit (S/N 23785). The most obvious difference is that my power supply has both +16V and -16V for the preamp which are regulated by individual zener diodes, but these zeners are not connected to the base of any transistors. Your schematic shows only a +16V (or perhaps +18V - it's hard to read) from the power supply controlled by one zener/transistor combination. I got this used from a fellow down the street in about 2000.

  • jcqcomm Oct 23, 2016

    |Your provided link for the upper board is still good, but the document for the lower board is no longer there. Is it possible to re-post it?

    Thank you

  • Rob C Oct 29, 2016

    Looks like scribd killed off the old docs. Here they are in Drive: Lower Board:https://drive.google.com/open?id=0B5m1Ao... and upper board:https://drive.google.com/open?id=0B5m1Ao...

×

Ad

1 Suggested Answer

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

LG 55LS4500 55 in. TV has sound through speakers, no audio except a hum from headphones and the optical digital to analog output fiber lights up but no sound output What board is bad?


Hi Louis,
The audio circuitry is located in the main board. Try unplugging the TV for a while and try again if the audio comes back.
I would suggest to check all your settings in the audio section first and if everything seems OK then the main board should be replaced.

Feb 26, 2017 | LG 55LS4500 55 Inch 1080p LED LCD HDTV -...

2 Answers

Pioneer VSX108


You have an amp problem or maybe a short in the output area

Dec 16, 2007 | Audio Players & Recorders

1 Answer

Hi, I have a B&O beocenter 1800 with a really load hum on the right hand speaker. This occurs on both radio and turntable. I have swapped speakers and cables and hum stays with RHS speaker output


this old timer probably has an output amplifier fault.with a circuit diagram any competent engineer shoulb able to locate the problem with the turntable removed access is easy and so is replacing parts

Nov 19, 2013 | Bang and Olufsen Audio Players & Recorders

1 Answer

Peavey 150m power amplifier - no audio, hum


Bad caps probably..old unit, do you have a capacitor analyzer...if not you might find a Sencore LC102 to test caps with on ebay...

Jan 16, 2013 | Peavey Xr600b Mixer Amplifier "last One"...

1 Answer

No sound on toshiba 36 tube TV


Check its speaker/s. If it is OK, the audio output IC should be checked.

Jul 14, 2012 | Toshiba 36A43 36" TV

1 Answer

How do I GET THE HUMMING SOUND OUT


Hello
The audio output section of your tV has the fault. The main reason for HUM on output, is due to a shorted audio output IC. Never use the TV, until the fault has been rectified. Prologed use at this state will damge the speakers, and speakers may also be replaced. OK.

Feb 02, 2012 | Sansui Televison & Video

1 Answer

Acoustic solutions as122 40w x1 , 20w x3 . awfull buzz/hum on right channel output similar to the hum from a 50hz strip light


You're half-way there. Web search "audio system hum" and factor in those things that match your scenario.

Sep 07, 2011 | Audio Players & Recorders

1 Answer

"60-Hertz hum that comes from


What does monitor speaker MS16 have to do with an organ? To use these on an organ you should be using DI boxes to convert to balanced lines into these speakers. Who knows what type organ you have as you did not give us a clue. There are some POOR QUALITY audio output add-ons that are foisted on people that supposedly put out line level audio from older Hammond organs... these are noisy and generate hum as they have not been engineered but instead tinkered.

Sep 02, 2011 | Behringer MS16 Monitor Speaker

1 Answer

Noisy NS50P DVD audio output.


Ok, Please open tope cover then DVD processing board and check any dry solder joint at Red pin area.

Jan 10, 2009 | Sony DVP-NS50P DVD Player

1 Answer

Constant hum


CHECK THE ALL THE CABLES (RCA) .
i think missing ground sheeld .
or smoothing capacitors are leak.or power output section faulty.
can you poen the cover and check circuit board get wet anyhow,
nuwan

Sep 23, 2008 | Sherwood RD-6500 Receiver

Not finding what you are looking for?
KLH ASW10-120 Subwoofer Logo

Related Topics:

3,556 people viewed this question

Ask a Question

Usually answered in minutes!

Top KLH Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5699 Answers

The Knight
The Knight

Level 3 Expert

76143 Answers

Gil Shultz

Level 3 Expert

3388 Answers

Are you a KLH Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...