Re: Altec Lansing MX5021 silent, need Schematics..

I have a few pictures. It may be varnish that covers the first one (U13), but the TDA7433D (U8) looks like it has been too hot.

They designed the speakers so that these two ICs are literally covered in rockwool, so i'd image they can accumulate some heat during longer use.




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Re: Altec Lansing MX5021 silent, need Schematics..

I know this is an old thread, but it is the closest thing to a solution, i have been able to find.

I have two sets of the Altec Lansing's MX5021. One of them doesn't work. The other one still works.

There are two ICs located on the back of the PCB. The first one is ST TDA7433D located at U8, which is partially melted on both of my speaker-sets, but the label is still readable.

The second one is unidentifiable, since it has melted/ deformed to a degree where the model-number is unreadable....