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JVC AV2749S No Sound at all,good picture though

Discussion in 'Electronic Repair' started by mlambert, Dec 9, 2004.

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  1. mlambert

    mlambert Guest

    I have a JVC AV-2749S, the problem is the audio, and there isn't any sound.

    The source power for the TA8200AH IC is fine. The SAMS photo fact power

    Source [5] say it should be 20.0V, and I'm reading 15.7 at its source. The
    reading

    I get at the positive side of the input cap699 just before going into the
    VCC pin 9 of

    IC says 15.3V. So with that reading I know I have power at the input without
    taking a

    reading at pin 9, for this IC can operate between 10v-37v. There is no
    static

    sound like one would normally hear, I mean not even a trackle, faint sound
    of any kind.

    All other features and Functions are fine. Meaning the picture is great. I
    don't have

    The original remote, but the universal I'm using works all the on-board
    functions

    brightness, volume, scan channel and so forth.

    The only tools I have to work with are a DMM and logic probe.

    Any input would be excepted and appreciated. Thanks for your time.
     
  2. Guest

    My info says to replace IC631(TDA1256).
     
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