KLH ASW10-120 Subwoofer - Answered Questions & Fixed issues

If the sound is more of a low hum than a buzz, you probably have bad capacitors in the power supply...Time to take it to a shop.

It's very likely that lightning has damaged the internal parts of the speaker. You may be able to get it fixed, but it may cost more than the sub is worth.

Other than its a power board for a KLM 10" powered subwoofer board I can't really help you. I have been looking for a schematic for it for months. I am looking for were the black wire connects from the selector board to the power board. I guess a photo of it would work for me, it connects the base of q1 to the other board.

I would fit the same type, unless the schematic shows a change, which clearly it doesn't. However I would be surprised if R42 burnt up alone! Look at the schematic, is R42 linked to any other transistor or part? If so check them if you can.
By the way is R42 a fuseable resistor, for example is the symbol on the schematic or on PC board different to most other resistors?

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

There is a small plastic plug just above the power cord. Remove it to find the fuse. http://product-images.highwire.com/4442801/6385-5.jpg

Is the vibration coming from the heatsink itself or from the fan running at high speed?I highly doubt the processor itself is vibrating; no moving parts to vibate. A more likely suspect would be one or more of the fan blades having gone out of balance and causing it to resonate at certain RPMs.What cooler are you using?Increase Engine Horsepower.

HelloIt 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.

if your a good craftsman it is possiblle with a new hook upbest buy has them for like 20$

The amps do have issues that is for sure - That is where I step in - I can repair your amp and make it so it won't burn up (catch on fire) again. When the amp goes it burns a hole in the board - but it can be repaired. I have done several hundred and all customers are happy :) ... Look for my add here and also on ebay

 Try here: http://www.parts-express.com/home-audio-video.cfm

I've purchased from them before and found thier products to be quality and the company is trustworthy.

 

I think it wants you to raise the volume high enough on the sub so IT can hear at least 75dB. It can always adjust the sub downward if necessary. Max it out at the sub and let Audyssey deal with the adjustment.

Your crossover frequency selection would be a piont below which you want the sub to activate. It depends on the bass capabilities of your other speakers. You want some overlap so there's no droop in the crossover region where your main speakers roll off.

if you can look at the underside of the board with the resistor on it, take a magnifying glass and look around the pins poking through from the components. It may be that the heat as unsoldered a component (be it resistor, capacitor or otherwise). Look for gaps in the solder around each pin, and if there are any holes around the pins, try filling them in with a little solder.

Fuses only blow like that when a semiconductor device is acting like a piece of wire causing an overload. An ohmmeter on the ohms setting will show any transistor with this condition as a short, just like you had touched the test leads together! Follow where the fuse leads to. And look out for signs of damage too. The most obvious parts to go are the ones that do the work, in the power supply or the main amp device, often an IC.

This can be due to either the integrated power supply system or the amplifier itself. As a tecnician I can imagine the possible faulty components and I guess that the cost isn't too big. But since I don't know your area I suggest to ask from a technician at your area to check the subwoofer.

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Stelios
direct fixya link: http://www.fixya.com/users/technical114

The sub works but the speakers don't? Do you hook up the speakers to the subwoofer output "loop"? This is a circuit issue when it works and stops working. I have the same issue so I wound up joining the wires that go to the sub and the wires that go to the speaker together and place those connections into the sub. The sub works, the satellite speaker works and the impedance load is no issue for my system. Confused? Simply run your neg/pos wire to the sub and where it connects to the sub, run another cable to the speaker (pos to pos., neg to neg).

The only way to repair it would be to deal with component level repair. Although I have the experience, it is too petty and it works fine the way it is.

I realize that this is an old problem, but folks are still finding it on searches, so here goes.

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

http://www.docs.sony.com/release/STRDE335.PDF

I am basing hookup on my Bassbite !! manual. The procedure should be the same as on your Bassbite V

I have given you a link to your Sony Owner manual. It looks like you will connect your sub to the sub output on the rear of your reciever using the rca cable. Woofer out on the Sony to the R/Mono input on your Bassbite. If you have the front and rear speakers hook your rears into the rear speaker outputs then connect your front speakers to the front speaker outputs of your Sony. Your speaker jacks on the Bassbite will not be used for this configuration.

Now, adjust your speaker size setting for "SMALL" or "LARGE" speakers as appropriate for your setup (this is for the front and rear speakers and will not effect your Bassbite). Now set your Sony subwoofer output to "ON" You access this setting through your menu. That should be located on your remote for the Sony. You will want to refer to the manual to find the exact method to access your system menu.

If the link to your manual doesn't work for you then go to http://esupport.sony.com/US/perl/model-documents.pl?mdl=STRDE335 and click on Operating instructions.

Hope this helps. Let me know okay? By the way, if this works for you you should be very pleased with the sound quality :-)

Kindly, DAVID (sean1dave)

Fundamentally the same sub - use these instructions as a guide.

http://www.parts-express.com/pdf/300-635m.pdf

Check out this thread
http://www.fixya.com/support/t2753393-klh_subwoofer_about_6_yrs_old_keeps