Question about Altec Lansing ADA995 Speaker
Came with Dell desktop. Stopped working. Got nothing when checked using the rear panel diagnostic jack. Fuse is good. I need a schematic of the subwoofer assembly. Any ideas? Thank you.
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: This resistor was blown out.
Positive Voltage Regulator is blown out:
Notice the traces where corrosion caused a short:
Another Altec Lansing ADA995 does not work - 8_18_2012_3_30_13_am.jpg:
I pAltec Lansing ADA995 does not work - 8_18_2012_3_31_59_am.jpgok the picture I went ahead and replaced all of the 4.7 ohm 1/4 watt resistors:
BlownAltec Lansing ADA995 does not work - 8_18_2012_3_33_48_am.jpgistor:New goods!
Just before surgery on the amp chips:
Re-jumpered the traces:
Re-jumpered the traces: Boy that "Heat Sink Transfer Paste" is really messy!!!:
New amp chips are all nestled down in their new home!:
Boy that's a big heat-sink:
This resistor was blown out.
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
Posted on Aug 18, 2012
I've managed to fix the amp in the ADA995 when I blew the rear channel amp. There is a design fault with the voltage regulator that causes it to run very hot, which frys the plastic housing glued near it, which corrodes the circuit board trace.
Getting the sub/amp apart is a *****. But doable. You need to not only remove the screws in the back under the flat grills, but ALSO 3 screws behind the top speaker that also hold the amp in place. And getting the power supply out is another rather difficult procedure, which is needed if you want to run the amp on the bench to troubleshoot.
Posted on Apr 22, 2012
Does the unit have a fuse??
If so I would start there, making sure that I replace it with a like fuse.
I don't believe you are going to find a schematic outside of a repair center. Leaving you with a repair center or replacing the speaker system.
Looking quickly on the web, I see a great many refurbs not sure why, but a question.
Posted on Aug 20, 2008
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Posted on Jan 02, 2017
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