Question about Dell A525 Computer Speakers

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No sound from Subwoofer. Traced fault to subwoofer volume control after checking solder joints on switch pcb. Sprayed switch lubricant into the switch which helps. Where can I obtain parts for the A525 (namely the subwoofer volume switch/pcb assembly)?

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You can't get an original part unless you find a system on eBay or somewhere similar and take the part from it. Computer companies buy these speaker systems from other manufacturers, and treat them as just one big part. Under warranty they simply replace the entire unit. No components are offered (other than the wall-wart AC adapters when used). I went through this with Compaq/HP and Dell when I worked in service for a big retailer. Most people just buy a new system when theirs goes bad out of warranty.

Now, if you're like me (and I know you are since you're asking), you don't like to throw anything away if it can be fixed. Since this is the subwoofer, it's probably going to be on the floor or otherwise out of sight. So another possible repair is to get a replacement control with the same value as the original, solder some leads onto it, tack them to the pcb pads of the original, and just let the replacement hang out the hole where the original came through. Or you can be a little more ambitious and mount the new control properly, then wire it to the pcb.

Good luck in the repair, and thanks for using Fixya!

Posted on Feb 01, 2010

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My subwoofer will not wake up, regardless of whether I flip the switch from Auto to On or not. Suggestions?


The sub settings for testing should be: Crossover frequency - Max; Volume - Mid; Phase - Normal.

As a quick test, unplug the sub cab from the amplifier/receiver end. Switch on the sub and turn the volume down all the way. Briefly put your finger across to short the RCA/phono tip and ring. The sub should make a buzzing sound. You now know that the sub is working and the cable appears to be okay or not.

If you've got power then that's a good thing. It could be something simple as a broken solder joint or bulging capacitor.

Aug 05, 2014 | Harman Kardon HKTS 14 System

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Basslink has no output, but Power LED and Servo LED always on.


Hi,

One or more of the DC to DC outputs might be bad. Check the
/- 54v on the main PCB and the /-15v on the switching controller PCB.
Losing one side of the 15v will cause the limit comparator to rail and force the servo protection, even with no input signal.

Apr 02, 2010 | Infinity BASSLINK Car Subwoofer

1 Answer

I have an Infinty Bass Link hooked up to my 2002 Honda Accord sedan for extended bass response on the standard stereo. I hook it up with premium power cables, etc...according to manual. I then hooked it up...


Hi,

Does the servo led stay on? If so, you might have a fractured solder joint. Inspect the switch control PCB for fractured solder joints and check the Positive and Negative 15v outputs on the same board.

Jan 14, 2010 | Infinity BASSLINK Car Subwoofer

1 Answer

Subwoofer volume raises and lowers ...sounds like some sort of short in the voice coil. limited knowledge in this and haven't yet figured out how to open the cabinet on this Lifestyle 12.


Hiya, sounds like it could be dry joints (bad solder), loose connections or maybe the pot is dirty. I would suggest someone with experience with a soldering iron though as mistakes can produce a big bang!

If the speaker is really sounding scratchy then could be the coil, but still prefer the dry joints...

Best of luck

Jul 14, 2009 | Bose Lifestyle 12 System

1 Answer

I have an infinity sw12 that is for some reason making a high pitched noise and some cracking noises as well. It does seem to work otherwise. I get the same noise when the cable to the stereo is unplugged....


It could be an internal "cold solder joint" however, if your lucky, it may just be dust buildup on the control pods and switches. Radio Shack sells "Tuner Wash" which will clean potentiometers (volume controls) and other electrical contact points. It's an inexpensive "try". Pull the volume and crossover knobs and lightly spray down with the wash. Let it set 10-15 seconds then move the control pod back and forth. Turn it back on and see if it's better. Hope this helps

Jun 26, 2009 | Infinity SW-12 Subwoofer

1 Answer

Velodyne SPL8R - same problem...


The first thing to do is unplug it, then pull the sub out of the cabinet, then pull the amp out of the cabinet. If you can take out the amp w/o taking out the sub, great. If there are any exposed printed circuit boards, look for dust buildup. Sounds like you've got alot of static energy built up in the internal electronics. If you have to disassemble the casing to get to the circuitry, do so, just do it carefully. Look at the boards. If there's alot of dust, get some printed circuit board cleaner.(pcb) cleaner found at Radio Shack. Then spray off the boards and the subs volume control as well as the crossover control. This will Not hurt any electronics.Re-assemble and test. If you still have noise: Take a careful look at the input side of the amps circuits and traces, if you have a magnafying glass it helps. What your looking for is a bad solder joint. You will see all the little dimples on the boards from soldering at factory. When you look at the solder point, look for a circular ring generally midpoint on the solder or right at board level. This can take some time, however, it's free and it's more than likely the problem. To fix a cold solder joint you need a fine point solder gun, just touch the point that is bad and it will re-seal, then test. Plug n Play. Hopefully it's just dust and you don't have bad solder joints. Velodyne makes an awesome product!, very rarely do I see problems with them. If you need some more help with this, post a comment and we can dig further. Hope this helps

Jun 08, 2009 | Velodyne DD-10 Subwoofer

1 Answer

Subwoofer switching off


have you checked all speaker conections? is the cooling fan working ?are you using the correct speakers supplied with the unit ? have you tried using headphone's if so could you then increase the volume .hope this helped.if you tried everything and are still having problem's i think the amps output transistor's or module is failing.you could try tapping the unit if you get a crackling sound you might have dry joints ..good luck farr64

Apr 29, 2009 | Televison & Video

2 Answers

No Output Subwoofer


hi, ya , some recievers have its setup where u have to enable the sub out,, check the menu carefully, also the player menu if the sub is on or off, let me know..

Jan 10, 2008 | Sony SA-W305 Subwoofer

4 Answers

Yamaha YST-MSW10 subwoofer quits after about 10 minutes


This problem can be solved by either of the following:
1/ Modify the PCBA to prevent the auto shut off feature from working. This is done by adding a 20k ohm resistor across pins 1 & 2 on the timer IC6. This resistor will prevent the timer from turning off the amp. To do this, unplug the amp. Remove the 8 screws on the perimeter of the rear of the amp. Carefully remove the rear plate. Disconnect the speaker wires at the speaker and the front panel connection on the main board. Locate IC6 on the bottom of the main board. Solder a 20k ohm resistor (1/4W) across pins 1 & 2. Pin 1 and Pin 8 are noted on the board. Be sure to insulate the leads of the resistor to prevent contact with the board. See picture. Re-assemble in reverse order.
2/ Some 5.1 channel amps allow independent control of the volume for the subwoofer in their setup. Check your amp to see if you can raise the signal level going to the subwoofer to prevent the amp from shutting off. You can then dial back the volume of the subwoofer using the volume control on the front._436.jpg

Aug 07, 2007 | Yamaha YST-MSW10 Computer Speakers

1 Answer

Regarding Sony SA-WM250 Subwoofer


There is probably a bad solder joint or loose wire inside of the sub box. If you can, unplug the sub, take the screws out and remove the back to inspect the circuit board. A clean solder joint is pointed and shiny, with the solder evenly distributed in the hole. Also check to see if any plugs are loose. Plug in the audio input and then the power, but be very carefull not to touch anything inside the box while the cord is plugged in!! Play some bass at moderate volume so there is pretty constant sound. Now, take a screwdriver with an insulated handle and gently tap around on the connectors and circuit board. Tap a little harder if nothing happens, also tap in different areas to try to force the sound to cut out. You can try to locate where the bad connection may be by tapping lightly and zeroing in on the location. When and if you find the problem, you will need to solder the connection with a soldering iron. If you don't have a friend to help, try a local electronics store. Good luck!

Jul 12, 2007 | Sony SA-WM250 Subwoofer

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