Question about Altec Lansing MX5021 System

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Altec lansing v-2121

Pls. show me a schematic diagrams

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Altec Lansing VS 4121

It is unlikely that this is a problem with your speakers more likely that it is a problem with the DVD player itself. I would recomend trying another DVD player.

Regards, Andrew

Posted on Sep 17, 2008

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SOURCE: Can the Altec Lansing VS3251 5.1 work with a Xbox?

Because this system is made to work with the PCs, it has a 3.5 mm stereo input. The 360 has rca cable outputs. Fortunately, the signal is the same and all you need is a 3.5 mm to rca y adapter that you can find at radioshack or any local electronics store.

Posted on Apr 16, 2009

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SOURCE: Doesn't power on when you

Did you notice the plug to the wall outlet and make sure the wider blade is plugged into the longer slot? Is the other end of the power cable connected right to the speaker? Is the LED lit after you pushed the power button? Is it too dark but lit? Is there a surge protector not turned on? If you saw LED light on but hear no sound, there might be problems with the computer or devices connected to it or we can diagnose further.

Posted on Jan 13, 2011

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SOURCE: Altec Lansing ADA995 does not work

This is my Dell Altec Lansing 5.1 (ADA995) surround sound amplifier for my computer. There is a design flaw where the board gets corroded due to the fact they caulked or glued it togther and left some of the circuit board hanging out. Just thought I would point out my findings in case some of you had the same system. It's a relatively easy fix. I got all the parts from Newark for about $30.00, and it took roughly 2 hours. Original Amplifier Chips below:
8_18_2012_3_19_35_am.jpg

Positive Voltage Regulator is blown out:
8_18_2012_3_28_01_am.jpg

Notice the traces where corrosion caused a short:
8_18_2012_3_28_49_am.jpg

Another view of the burnt traces:

8_18_2012_3_30_13_am.jpg

The glue or caulk ran straight across here:
8_18_2012_3_31_05_am.jpg

This resistor was blown out.
I pulled it out before I took the picture I went ahead and replaced all of the 4.7 ohm 1/4 watt resistors:8_18_2012_3_31_59_am.jpg

Blown out 4.7ohm 1/4 watt resistor:8_18_2012_3_32_37_am.jpg

New goods!8_18_2012_3_33_48_am.jpg

Just before surgery on the amp chips:
8_18_2012_3_35_01_am.jpg

Re-jumpered the traces:8_18_2012_3_35_55_am.jpg

Re-jumpered the traces:8_18_2012_3_36_44_am.jpg

New amp chips are in! Boy that "Heat Sink Transfer Paste" is really messy!!!:8_18_2012_3_37_26_am.jpg

A peek at the underside:8_18_2012_3_38_11_am.jpg

8_18_2012_3_38_35_am.jpg

New L7815CV Positive Voltage Regulator (Shown here):
New L7915CV Negative Voltage Regulator is on the back side:8_18_2012_3_39_35_am.jpg

New amp chips are all nestled down in their new home!:
8_18_2012_3_40_22_am.jpg

Boy that's a big heat-sink:
8_18_2012_3_41_02_am.jpg

Time to try it out. And it works. Boy, going a week with out 5.1 audio on your computer is terrible! Nobody should have to live that way or be subjected to that kind of torture. I guess this would be considered a "first world problem"!

-Jason-

Posted on Aug 18, 2012

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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

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