Question about KLH ASW10-120 Subwoofer

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Where can I buy printed circuit board for a KLH 6.5 subwoofer?

Circuit board is burned out

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  • KLH Master
  • 76,036 Answers

Hello
It will be very difficult to get its printed circuit board as it is. You can buy a populated board to your KLH from Ebay. Just search in with its part number.

Posted on Feb 12, 2012

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Bennytechkid
  • 99 Answers

SOURCE: i have a klh subwoofer about 6 yrs old.it keeps

Okay sounds like there is Fault in the power supply or the output transistor have shorted and is pumping the driver with DC....remove the driver and test with a muti-meter and using the 200 Ohm setting. put it across the terminals of the subwoofer make sure it is disconnected from the amp module....if it is a 8 ohm driver you may get somewhere from 4-8 ohm reading if its a 4 ohm somewhere from 3-6 ohms....if you are getting a 0 ohm or "short" or a really high or infinity "open" reading then the driver probably has caused damaged to the output transistors in the amplifier module. connect the muti-meter to to the red a black leads from the amp module that was going to the speaker...put the muti-meter on the highest possible DC voltage setting Mine goes to 1000VDC and power up the sub amp module now you may get a jump and power up but then it will drop to around 1.0v (or less) that is normal but if it stays high like anywhere from 30-150 VDC then you have blown output transistors (remember if you dont have this issue just skip forward!)...if this is the case pull out the amp module (remember to follow warnings and disconnect from mains power) now the DC filter caps in the module stay charged for long time after power is removed remember: test before touching!! now hopefuly all transistors are laid out infront and you wont have to dig for them the're normally are mounted flat and bolted to a external heatsink on the back. test between all junctions of the transistors B+E C+E C+B make sure there are no shorts...if there is a short replace the transistor. across from it there is its partner...replace him to! more than likely he's faulty because they work in whats called a Complimentary pair...the PNP pulls up the postive and the NPN pulls up the negative..together making a full audio signal. now after replacing all the faulty transistors test for DC on output leads. If there is none carefully connect a NEW driver of the same impendance as the old one.....but do not connect up the old one because you will blow the amp again....now power up and test for sound....all good????


Now if there is NO DC leaking on the Output leads but its still blows fuses there is a power supply fault! pull out the amp module now there is two types of power supply that this sub (or any amp for that matter) uses Switchmode Power supply (SMPS) or the normal transformer supply.im hoping for your sake it is a normal transformer supply it makes it soo much easier to fix....now be very careful you need to check the DC filter capacitors for shorting or any other issues! so undo the board from whatever it is mounted on, now remeber these capcitors can stay charged for along time so be sure to test before touching...if they are still charged and you want to dischrge them i use a 100W bulb (not an energy effiecnt bulb...but a Normal filament globe ) and connect up two leads to it...now put it across the capcitor banks...it will glow brightly and it will slowly dimm....power discharged!!
remeber to check that all caps are fully discharged!!
now test with muti-meter again on ohms mode and check for any shorts...now as you test the resistance will get greater as the caps charge up...this means all is good but if the meter stays at short then you have an issue with one of the filter caps (now if there is a short the caps will not have charge in them but still test!!) Now carefully remove each cap and test to finally locate the shorted one(s)...if there is no fault in Filter caps i would check the power transformer on the primarys so disconnect the leads from the power input socket (remembering the whole time we're doing this power is disconnected!!) and check with ohms meter there could be fault in which case you need to get a new transformer..if its not a faulty transformer.. i would be checking all mains power connections: the switch,interconnection leads,the fuse holder ect...to make sure there is no shorts...now if the power supply is a switchmode supply i would not even go there! i can repair them but it is way to hard to describe here and is not suggested for a DIY'er to attempt to repair but if its 6 years old it should be the way i have described above (normal transformer supply)......feel free to contact me if you need some more help in repairing this..E: ben@xdcpro.com.au
Depending where you are in the world most of the parts for amps can be sourced at local electronic stores or you could ask local repair stores to order parts in for you..if you are in Australia..if you want you can send me the numbers on the parts i can arrange them for you and post them out to you! good luck and i hope this can fix it,ben

Posted on Aug 11, 2009

  • 547 Answers

SOURCE: Have the KLH ASW10-120 Powered Subwoofer and it is blowing fuses

This model has a high failure rate with the power supply board. Typically, power resistors fail, which in turn burns out the big capacitors.

I have not heard of transformers failing though, so it shouldn't be too much to repair it.

Here are the schematics for the unit: Upper board and Lower board


Posted on Jan 11, 2010

renosean
  • 492 Answers

SOURCE: klh subwoofer asw80-80

Unfortunatly it is due to the wiring within the house. Short of buying an apc back up which will regulate the power there is not a powerstrip that will stop this. I used to have the same problem

Posted on Mar 08, 2008

  • 1 Answer

SOURCE: KLH ASW10-120 Subwoofer My KLH ASW10-120

Did you ever find a solution for this problem? I have the exact same thing happening with my KLH subwoofer and I'd love to know how to fix it!

Posted on Jan 26, 2010

dunnbiker
  • 8546 Answers

SOURCE: KLH subwoofer Model BASSBite V. Has a bad 60Hz buzz

Before you go throwing money at this problem, try to eliminate any external influences like track lighting. I myself am trying to figure out why mine makes a buzz throughout my system when the lights are on. I already replaced the variable light control with no improvement.

Bad cable ground can let airborne electronic noise into the Sub's amp.

Posted on Jan 31, 2010

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Schematic Diagrams for KLH ASW10-120


After acquiring a fried KLH ASW10-120, I write to the tech folks at KLH and they sent me the upper and lower board schematics. I asked if I could publish them online, and explicitly asked if I could share them on FixYa.com, and they gave me permission to do just that.


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

on Sep 25, 2009 | KLH ASW10-120 Subwoofer

1 Answer

How do you repair the surface light on microwave


You know how when you turn on a regular light bulb and it burns out with a bright flash? What happens is that when the filament burns out, it breaks and bounces back and hits the other electrical post and basically shorts out causing that bright flash. Sometimes, when the light bulb in the microwave burned out, it shorted out, and caused the circuit-board trace to burn up. (This is not just conjecture; I've seen it.) If that's the case, then you would have to replace the main control circuit board. Unfortunately, a rather expensive repair for no lights. (Although the circuit board trace can usually be repaired by direct-soldering a wire to replace the burned trace. Sears repairmen won't do this, but an independent electronic technician could do it.

If you need further help, reach me via phone at https://www.6ya.com/expert/ronald_e6b9572cebe3ad27

Apr 23, 2014 | Kenmore 62622 Microwave Oven

1 Answer

Hi :) I have the Trane Furnace that just turn on


on older tranes if 120v power is reversed it would do that try switching leads on pigtail to board. make sure to unplug first!

Oct 31, 2013 | American Standard Trane Ge Gas Furnace...

1 Answer

I burned up some resistors in my klh asw120 # r52 r48 and r49 i need the values to them so i can replace them they are too burnt to tell the color code please get back to me with the values! Thanks JASON


This is a pretty common problem with this sub.

Here's a solution that I posted earlier this year, including schematics for the upper and lower circuit boards. Be sure to check the circuit board revisions to make sure they match my schematics.

Aug 10, 2010 | KLH ASW10-120 Subwoofer

1 Answer

Hum no audio output


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

Dec 22, 2009 | KLH ASW10-120 Subwoofer

2 Answers

Have the KLH ASW10-120 Powered Subwoofer and it is blowing fuses


If it stays on for 3 seconds then it probally is not the transformer. However it may very well be the power amp no way to tell untill we operate. Call Pro Line Music 215-736-8055

Dec 11, 2009 | KLH ASW10-120 Subwoofer

1 Answer

COMBINATION OF PROBLEMS WITH MODEL 25 HOT POINT SIDE BY SIDE. UNPLUGGED IN FREEZER FAN SO REFRIDEGERATION UNIT WORKS AND TOOK OUT ICE/WATER CHUTE LIGHT SO WATER INDOOR DISPENSER WORKS. LOOKED AT CIRCUIT...


i think you answered your problem / sounds like the board. some times you can smell the burn and some boards have clicking sound . / from what you have stated . i would replace board. mm the burn is the price of the board .. mm

Dec 03, 2009 | Dryers

2 Answers

No sound and smells like burning


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 techdepartment 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


Nov 08, 2009 | KLH ASW10-120 Subwoofer

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