Question about Logitech Z-680 Computer Speakers
The Left Rear channel is out. I've tried the speaker on a different channel - it works fine. I isolated windows and my sound card by plugging in my MP3 player; nothing comes out of that channel.
If the Logitech Pulse 475 is the same as the Labtech Pulse 475 then the left channel amplifier probably blew. The Labtec uses a 5 pin TDA2030A, which costs around $3. You will need to know how to solder to repair this. The back of the case comes off by removing the 8 screws around the back of the case and lifting it out by the power cord. Then, simply desolder the left channel amplifier marked IC201 (it's on the leftmost side of the board, next to the volume potentiometer) and solder the new amplifier in it's place.
Posted on Oct 30, 2006
My guess is that there is an output failure on that particular speak channel. Take the unit in for service.
Posted on Jun 09, 2007
This is a product defect. Logitech knows about it and wounldn't replace my speakers. It's in the remote volume control. There defective part is the volume control variable resistor and they know. Very expensive speakers that I shouldn't be throwing out becuase of a defective part. NEVER BUYING A LOGITECH PRODUCT AGAIN!!!!
Posted on Dec 09, 2006
Check input cable, if ok , it's possible that a channel died on the audio output IC .
Posted on Jun 20, 2006
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