Sony STR-DE635, Sound from left surround speaker but not right

Might be a bad speaker relay.

go to audio set up and configure the system for 5.1 or higher sound output.then only all the speakers ll work

The rear left and right channel has a audio output ic problem, first check rear speaker wires for shorts, if okay! the system will need to be assessed for repair costs.

There are a few things required for the rear surround channels to operate;

1. The surround back channels must be enabled in the surround setup menu.

2. The media being played through the receiver must have audio encoded for the rear surround
channels. There are only a few exceptions to this but I'll exclude the explanation for simplicity.

3. The audio level of the speaker channels must be set high enough to be audible.


Enter the surround setup menu with your remote. Use the center button on the remote to toggle through the selections, press down on it to enter the selection.
You will navigate to a selection in the surround setup menu that says "surround back" or S/B with a selectable yes or no indication. Press on the center button to enable them.

Media like DVD or Blu-ray that has 6.1 or 7.1 channel audio has separate, or often referred to as "discrete" or "matrixed" audio intended for playback through surround rear speakers, depending on the music or movie. If your media is encoded for 5.1, then there will be no audio sent to these speakers. However, with the different modes of on-board digital processing of this receiver you can still have audio through these speakers.

Last but not least is the actual playing level of these rear surround channels. They may simply be adjusted to quietly. Enter the setup menu with remote, choose "level" and navigate to the rear surround channels. You can adjust the level up or down in 1/2 dB level increments by toggling left or right with the center button. Each surround channel can and should be adjusted independently and equally.

I don' know what type of system you have, but try to switch system to "SURROUND" mode, or "DSP" mode.

Check in speaker setup menu that your rear surround channels are enabled.

I had this problem last night.

To solve it, you can reset the amp by:

1) Put the receiver on stand-by
2) Hold down "MODE" button and press on button
3) "S.F. CLR" appears in the display and surround is back on.


Good luck

Dr Gardner

Maybe, it worked for me. my rear speakers workt ramdomly, often not. so i re solder the relay for the rear speakers, now it works fine everytime, a hole movie and some random on and offs, it can't do any harme to try=)

sorry my expertise is in appliances, youl need to repost you question to another tech

Turn your volume down,press the tape monitor button.then turn up?