Mr. Land wrote:
Greetings...

I have a Labtec powered speaker system model LCS-2412. This is a 2.1
system intended for computer use. It is quite old, purchased circa
1991.

Around '96 or so, I noticed that the treble control was only working on
one channel. The unit was out of warranty by then, but since these
speakers have just the right features for me, I decided to try to fix
them myself rather than try to find a replacement for them.

But Labtec support refused to sell me a schematic, stating that it was
"proprietary information" and per their policy they could not provide
it.

Since then I've simply put up with the problem, but recently the front
panel headphone jack was damaged, so I called Labtec to see if I could
get a replacement part.

They informed me that Logitech had acquired Labtec a while ago, and
when I then called Logitech, they informed me that the schematic was no
longer available! (gee, when was it ever available?)

Is there any remote chance someone here might have this? I know it's a
long shot, but I'm desperate!

Thanks...


I have the LCS2420, but mine has only the bass control.
What usually happens is that someone smacks the knob and busts the pot.
They're typically a dual planar pot that's gonna be hard to replace.
The circuitry is usually so simple that you can download the chip
datasheet and the sample application schematic will be real close.
mike

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