I need a circuit diagram for My Logitech Z-640 Computer Speakers

The different connectors are for 5.1 surround audio, and are for different speakers with your system.

• The green connector is for your front-right/front-left speakers
• The black connector is for your rear-left and rear-right speakers
• The orange plug is for your center speaker.

Most laptops do not have support for 5-speaker audio, so if you want to test each individually, you will need to plug them in one at a time and test playing sounds through them.
Hope this helps,

I have the same problem but its all the speakers, move the control pannal around and it should work. If yours is broken like mine call Logitech and they will help you.

logitech rarely has replacement parts. and for this model is not for the u.s. distribution so youcan not even call u.s tech support for help. try ebay or craiglist. if the connector is not proprietary you might be able to get a electronic repair shop to repin the connector.

Ya, here is a diagram I made of my Acoustimass 10 IV input cable. All you need is a female 15-pin d-type connector and a bunch of speaker cable (also one RCA connector for sub connection). Here's my diagram:

Here's a diagram of the 15-pin serial input cable that came with my Acoustimass 10 IV system. You just need a 15-pin female d-type connector, one RCA connector and a lot of speaker wire. Here's my diagram:

you have to reload the machine and if it continues like that,you have to buy a sound blaster

1.  Check the orange multi-pin connector the sufwoofer for a broken or bent pin.  If there is a broken pin you can bypass it by cutting open the cable jacket and tap onto the affected wire with a 6 inch or so jumper, and then attach a jumper to the appropriate point inside the subwoofer.  Pass the subwoofer jumper out of the case (drill a small hole) and connect it to the jumper you added to the cable.

2.  Try wiggling and rapidly rotating the volume control.   There are reports this control may become a problem as it ages.

3. I haven't been able to find a schematic.  My only recourse was to google the output amp and the 2 op-amp packages for data sheets.  They are readily on the internet.  Then I laboriously traced out the stereo paths.  I found that red and black fine tip felt pens were helpful in marking out the signal paths through the circuit boards.

check te switch wether its work...... or check your connection 15pin all the pins are in place if that okay its need to go into the main board

thanks

toki

Dell (Altec Lansing) A425 Subwoofer Pinouts

This is a standard female DB-9 serial port.
Here are the pinouts.

Pin 1 = Left Speaker Out +

Pin 2 = Left Speaker Out - (Common Ground)

Pin 3 = Left Line In +

Pin 4 = Right Line In +

Pin 5 = Left/Right line In - (Common Ground)

Pin 6 = Right Speaker Out +

Pin 7 = Right Speaker Out - (Common Ground)

Pin 8 = Power A

Pin 9 = Power B

Jumper (short) Power A to B to turn on.
If you want a volume control you need to put one on the inputs. You will buy buy a stereo volume control or potentiometer.
Here is some info on how to do this.
http://g4tv.com/screensavers/features/43665/Pump-Up-The-Volume.html

Cheers!

pls swap the spk pin in to your sound card jack socket . bye