I need a circuit schematic for Altec Lansing amplified speaker system 121

these should help or contact them direct

https://electronics.stackexchange.com/questions/100624/short-circuit-or-disconnect-to-bypass-a-compressor

http://www.kk4ice.com/?p=570

https://www.google.com/search?q=Altec+lansing+atp3+control+board+schematics

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Altec Lansing used to be good, but not any more. I had one that buzzed even when switched off. As it was in my bedroom, I put it all back in the box like new and gave it to a Christmas present drive for underprivileged children.

The speaker with the controls goes on the right. Here is the installation manual

https://www.manualslib.com/manual/365956/Altec-Lansing-Vs2621.html

Windows should find the driver, but here

https://www.driverguide.com/driver/company/Altec_Lansing/index.html

and here

https://answers.microsoft.com/en-us/windows/forum/windows_10-hardware-winpc/altec-lansing-vs-2621-speaker-compatibility/7a59abe5-2cd2-45fe-94eb-e2075508b466

Or contact direct via Support

https://alteclansing.com/product-category/all-speakers/

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You mean the internal schematic, as in diagnosing / repairing a fault?
Google is your friend.
Look in images section of your browser after entering "altec lansing FM501011854B, schematic".
OEM's / Original Equipment Manufacturers as a rule usually don't post full circuit diagrams of their products on the web, to avoid competitors pirating their products.
But you may come across the schematic on a site that stocks service /repair manuals.
Otherwise search for Altec Lansing (Consumer Electronics) website.

You don't. They're already amplified via the amp that's inside the subwoofer. They're only designed for a headphone output on a PV or portable audio player

You don't need theory of operation. Altec systems don't publich the schematics so your best bet would be component level work with an ESR meter, an oscilloscope, transistor tester and DMM.

We may not be able to find yet your free schematic diagram,

But if you insist on repairing your computer speaker,

• Open it up , and look for possible causes of

symptoms .

• Check on line for the datasheet of the amplifier,

• Use a multimeter to check for open and short

circuits.


Here is guide when repairing similar Computer Speakers
http://www.fixya.com/support/r4008719-diagnose_not_having_audio_right_channel

I am not sure what Altec Lansing product you are working on, but here are some sites with Altec Lansing schematics:

http://www.triodeel.com/altec.htm
http://www.schematics.ca/modules/PDdownloads/viewcat.php?cid=73
http://www.gourmetpa.com/a.html
http://www.altecpro.com/products/vintage/index.htm
http://www.schematicsunlimited.com/?z=altec-lansing
http://www.schematics-free.com/modules/PDdownloads/viewcat.php?cid=19

If you are unsucessful in finding the schematics for this Altec Lansing device, you may need to contact Altec Lansing for the schematics, service manual, or for them to have the device repaired.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

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

I suggest you to see this:
Altec Lansing Amplified Computer Speaker Repair

you need an amplifier