Lexicon Lx-7 buzz sound

Are there any labels on the fan?

If you are saying that it only works on say the left channel in stereo mode, but both channels come on in mono, then there's a fault in the amplifier's pre-amp. These days they are an IC, it can be traced by following the input wires to the point on the PC Board and then looking around for an IC with all inputs going in. If you are lucky there might be two! One for each channel. Replace the one on the dead channel. You can test it, either the single IC or both, touching it's pins with an insulated tool while the amp is on. It will buzz on the channel. Stereo amps have two sets of identical parts, except when an IC is involved. But even then that will have two halves (inside it). You just need to touch the pins of the IC, with the tool, but don't short the pins together! You should hear at least 4 buzzers. One at the right input, one at the left input, one each at the left and right output. If you only get the left an right output buzz, plus the good channel input buzz, you know it's the IC that's gone.

I assume you're wrestling with the choice of using its onboard amp fed by the MV-5 or driving it from the CX-7's unused channel.

Of course either way will work. I'd go with the preamp-to-REL method as the REL engineers undoubtedly gave some thought to the amp design for the price paid.

Attach it to the Sub1 Preamp out

http://www.retrevo.com/support/Lexicon-MV-5-Receivers-manual/id/22990ci271/t/2/

I don't think the Antex Electronics Antex LX 44 Sound Card has support for Windows 7, as far as I have found out it is compatibly with Win NT4.0, 2000 and XP.

Under the channel setup menu there should be a way to change the input type of the channel. When you go to edit a channel look for this setting. If all your channels are grainy this is probably the solution also.

I had the same problem on my VTX65. I noticed it would oscillate with different effects so I removed the effects module. Problem solved. Now it's dead quiet. I use a Digitech RP500 so removing the effects module was a non issue.

Might be caused by any of the Large Capacitors in the power supply section of the amp.

There are a few fuses inside the amplifier. The case lid will come off pretty easily once you remove all the screws. You can visually inspect fuses looking for the blown one (filament will be broken), or use a multimeter for ceramic fuses. However, the fuses in my B&K ST-1400 do have transparent cases. If once you replace the fuse, it blows again, then that would suggest an underlying problem.,
Cheers Jeremyt

I just purchased Sidekick 3 and have the same problem. I think we should return them =(

push the monitor button to go mono instead of stereo.