Question about Altec Lansing AVS 500 Computer Speakers

2 Answers

Rippling vibration in sub woofer seems to be transformer related

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 2 Answers

The power supply outputs DC voltage so there is a 2200uF cap inside it.  If this goes bad you get a humming out (usually from the base speaker) even at minimum volume.  Inside the base there are 3 TDA2007a 6 + 6W stereo amplifier 9 pin inline ICs, one voltage regulator IC, 5 other ICs, 2 more tiny transistors, 1 2200 UF capacitor, plus a bunch of small caps. Usually one of the TDA2007a amp ICs has gone bad (in my case it was the one that drives the base so the popping sound was coming out the subwoofer).   The TDA2007a seems to be a faily common audio power amp IC.  The main problem with the Altec Lansing AVS500 is that there are no screws to be able to take apart the base so you have to brute force pry it apart and then the jacks and controls are also glued onto the front plastic face of the subwoofer so that must be carefully pryed apart also to get the small circuit board out to be able to work on it.  It's all too easy to break something if you're not carefull, but what the heck, if the speakers aren't workiing you don't have anything to lose and if you are proficient with a soldering iron and have or can get a TDA2007a audio power amp IC you might be able to repair it.   My own speaker problem was easy to determine as one of the TDA2007a was overheating super quickly after plugging in the power.   Good luck to anyone else attemping a repair.

Posted on Jun 26, 2009

  • guruMarkB Jun 26, 2009

    If you are only experiencing a humming out of the base then just replace the power supply.


  • Cat_in_aShop Sep 30, 2010

    The humming sound starts when the IC gets overheated. I would not say for sure that the IC is bad because the sound is Ok you just have to keep it cool. Put a wet napkin on the heat sink ( make sure that water does not touch body of IC ot it will crack it and probably kill the IC). Mine works fine long time whis way. I suspect that some component on the board, probably a capasitor goes bad takin the IC off proper mode. It's hard to say without osciloscope, but presence of sound and not burned speaker means that final IC amplifier's pair of transistors is not dead or burned, it's just off ballance.

×

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

How to connect headphone with computer pc to use for video call

Posted on Jun 24, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

What is a sound bar woofer and function


A woofer is a device that producers low frequency bass sounds. Often in a form of Sub Woofer. Bass sounds are not directional. So once set up it will give the rumble and vibration needed to the sound system.

Dec 27, 2016 | Audio Players & Recorders

1 Answer

I have AIWA NSX-RV85. The sub-woofer surround tore leaving just the cone. When I play, The woofer just makes a rattling sound coming out of vibrating cone.Any advise on how to fix my speakers.Thanks


Refit the rubber, you can find itbon eBay, its called reconing actually in this case the cone is the inlybpart wich you dont want to replace... The rattling is beingproducer due to the fact the rubber normally holds the cone ibto positionering over the coils. This rattling is not good can defect your cone. So dont play it roll you got a new rubber fitted!

Nov 08, 2016 | Aiwa Audio Players & Recorders

1 Answer

Megaworks 550d doesn't switch on


Step 1:

i had same problem with my magaworks 5.1 thx550.
i have tried to find solution in web but it was only one which voltage sense resistor 2Mohm track in PCboard was damaged.
after check PCboard in my megaworks thx 550 i found that tracks are quite well and voltage sense resistor is well too.

Step 2:

REPAIRING PROCEDUREin below items there are repairing procedures that i did with my THX550.to access to BCboards it is required to remove electronic boards from woofer case.
1- remove cover of woofer.2- remove woofer speaker from case by cutting and marking connected wires.
3- remove all Philips screws around cover and remove electronic parts smoothly, care about glues around power cord.4- remove and disconnect power supply board from other parts.


3_12_2013_7_45_42_am.jpg5- replaced switcher TOP234Y and capacitors C102, C206, C205 and D10 as below photos.3_12_2013_8_08_28_am.jpg6 check all of related tracks in repairing area.3_12_2013_8_10_00_am.jpg


3_12_2013_8_48_15_am.gif7- now it is time to re assemble electronic parts very carefully and prepare for test. it is better to use isolated transformer and put a lamp in serial to protect PCboard against short circuit. if green LED (POWER LED) is on it means that every thing is O.K.
8- in this step all of electronic parts should return back to case and reconnect sub woofer connections.3_12_2013_9_02_39_am.jpg

Step 3:

after replacing damaged parts my THX 550 is working well maybe for next 10 years.
i hope above mentioned instruction can be useful and helpful.



Nov 14, 2011 | Creative Labs MegaWorks THX 550 Computer...

1 Answer

The transformer of my sub-woofer is burnt. When i take it to the repair shop, they say that the transformer is not available. I badly need to fix the speaker as i love them very much and the new ones are...


Sub woofers have small amplifiers , not transformers. The amplifier is removable and replaceable. The The overall size and the output wattage are the spec's you need . The output wattage is on the label which is attached somewhere on the speaker. You do NOT need to replace the amp with the Altec Lansing brand. Have you contacted Altec Lansing to purchase a replacement Amp? That's where I would start. If they cannot help you I would Google replacement amp sub-woofer, Altec Lansing model MX5021.
good luck

Apr 15, 2011 | Altec Lansing MX5021 System

2 Answers

I have a sony str de 325 receiver....what sub woofer will go with it and where do you plug it into the receiver?? Thanks


You will need a powered sub, one that has a built in amp. It will also need speaker terminal type inputs. Use the B channel to send signal to the woofer. Since the audio from the B channel is full range, use the crossover on the sub to determine which frequencies you want to hear. I would start at 100Hz and go up and down from there. Use the gain to adjust the volume in relation to the other speakers. The sub volume will be affected by the master volume.

Please rate if this helpful

Apr 05, 2011 | Sony STR-DE325 Receiver

1 Answer

Car audio sub woofers


is it the car vibrating or the sub making the noise ? if its the sub making the noise check all the screws holding in the sub and make sure they are tight or make sure nothing got sucked into your box if it is the car making the noise try using dyna mat to help stop the noise also check the surround on the sub and make sure there is no seperation of the surround from the cone

Aug 12, 2008 | Car Audio & Video

1 Answer

Sub woofer flashing red and green


sir,,i think there is something wrong with the connections or the cross over,,,kindly check it out or mjaybe the cone of ur speaker is damage,,,hope too help you thnkss??

Jan 27, 2008 | Kenwood SW36HT Subwoofer

2 Answers

Sub woofer amp blown


The output of the transformer goes to a RS404L bridge Rectifier. the 4700uF cap are leaking. Did you work in this area?

Dec 30, 2007 | Audio Players & Recorders

6 Answers

Intermittent Problem


One thing that comes to mind is you said the heatsink had come loose. if this was the case and it was the heatsink for the output transistors. Then this seems to be the best place to look for a broken solder joint. When either the unit heats up or vibration. One of the legs to one of the transisters opens this would case a half wave cycle drop. Do not know if I would consider the sound it would make as static. But it would become very garbled. get a bright light a slowly look over the circuit for broken solder joints use a magnifier if you have one. also wiggle the wires and tap on the circuit with something non-conductive like wood or plactic see if you can make this cause the condition. This may help narrow your search. Check as well on the top of the circuit look close at the transistor leads, because flexing back and forth can case them to break if flexed in the right place.

Aug 08, 2006 | Bazooka BTA10100 Car Subwoofer

Not finding what you are looking for?
Altec Lansing AVS 500 Computer Speakers Logo

944 people viewed this question

Ask a Question

Usually answered in minutes!

Top Altec Lansing Audio Players & Recorders Experts

Carlos L. Burgos
Carlos L. Burgos

Level 2 Expert

618 Answers

The Knight
The Knight

Level 3 Expert

74243 Answers

Jerry Umali

Level 3 Expert

979 Answers

Are you an Altec Lansing Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...