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TX DS797 popping sound, need subboard

Local repair shop tried replacing the digital processing chip (DSP), and failed by over heating the sub board.
I want to replace the subboard myself.
How do I get the right part?
I assume the sub board is a snap in, connect repair.
Do I need to ship unit to a authorized dealer?
It is past warrenty period, Im sure.
Give my toll free phone numbers to call.
I live in California

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  • Master
  • 734 Answers

Do you need service manual??

Posted on Dec 11, 2008

  • futureloginn
    futureloginn Dec 11, 2008

    download service manual from the above link ------



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I have the same problem with the static and distortion

I can only assume that the unit either produces noise or no sound at all. The DSP board contains all of the digital processing circuits. Even with all surround processing turned of, the signal still passes through this board. It is possible to repair the board, but special tools and techniques are required and most shops are not set up for that level of repair. Unfortunately, the safest option is to replace the board. Inquire whether or not there is a "core" charge. This means that there is some value to the bad board that can be refunded to you upon its return to the manufacturer. With a $300 board, you may be able to recover up to $100 by returning the defective board. Dan

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I have the exact same amplifier with what sounds like the exact same problem. I opened up the amplifier, and while it was powered on started tapping around until I heard the popping and crackling suddenly increase. I was using a piece of wood and the plastic part of a screw driver for this. The popping and crackling suddenly burst out onto all channels when I was tapping on the DSP board (encased in a metal enclosure to the very right of the amplifier).

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Finally I tried applying pressure to the chip while the popping was going on, and it stopped. Further investigation revealed that bending the board around the chip produced the same effect.

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