Question about Harman Kardon AVR 630 Receiver

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No surround sound

I have Klipsch speakers; one front, one subwolfer, four RX4s. I also have a 43 inch Pioneer Plasma TV. The Klipsch surround sound worked great, but now the only sound comes from the TV. I have checked all of the connections. Help Please!

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Hi,

As you already checked the speakers, the HK manual says to check if the audio analog chain is fine. That means selecting 6/8 direct channels as source and apply a sound source for each channel. You can use a CD and test each pair of the 6/8 inputs at a time or use the output from a PC sound card with a test generator software (some excellent free software available as from NCH swift). Adjust the volume and listen. I guess you will obtain sound from the right front channel.
If you have sound in all speakers at the end of the test it means all audio channels are fine end to end.
The good news according to HK manual is that you eliminated 90% of the component of the system. The bad news is the problem is in the DSP section. There are no instructions or tests for the DSP part so you will have to go to the service center.

Goodluck..

Posted on Feb 17, 2008

  • Priya darshan Feb 17, 2008

    I think the problem is the C657 capacitor, located on the DSP PCB. You can either replace it yourself, or just hand
    the info out at your local repair centre.

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  • Master
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Check the wiring while it is ON, there might be a loose wiring... also check the power of the amplifier... then check the TV setting for the activation of the surround system...

Post me the results... hope this Fixya the problem...

Posted on Feb 17, 2008

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Posted on Jan 02, 2017

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