Step up transformer for altec lansing atp3 that runs on 220 volts

The problem is usually getting into them.

https://www.google.com/search?q=Altec+Lansing+ATP3+speaker+volume+control+repair

different model

these should help or contact them direct

https://electronics.stackexchange.com/questions/100624/short-circuit-or-disconnect-to-bypass-a-compressor

http://www.kk4ice.com/?p=570

https://www.google.com/search?q=Altec+lansing+atp3+control+board+schematics

..

reinstall driver and select correct playback device in 'options'

Is the label missing? All the information is printed on a label or stamped into the plastic housing. Have you opened it? Many have an internal fuse you can replace.

Check fuse, but if there wasn't a fuse , your Altec need repaired to fix broken components in power circuits, could be the resistors, diodes or even transformer.

check the port to which u have connected ur speakers. And also install proper driver

Best bet would be to just strip the wire with a wire stripper or utility knife and twist the bare ends together to fix the connection. A little electrical tape around those wires and you should be almost good as new. Of course you might notice some difference in quality but I'm pretty sure the only way round that would be replacing the cable.

Try it out and let me know how it works out for you. If you know how to solder it might be a good idea to solder the connection as well.

there is a lose connection near the main speaker .When i move it sound stops 

Hi Saburine
http://www.teksale.com/computers/computerparts/listings/ALTEC%20LANSING%20ATP3%2027W%20RMS%20BLACK%203PC%20SPEAKERS.htm
here you can get the complete drivers.