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VCR - very low sound on some channels

Discussion in 'Electronic Repair' started by larrymoencurly, Apr 9, 2004.

  1. I have a Panasonic PV-V4521 VCR that gave low sound volume on some
    channels, whether the VCR was used to record or used as a tuner, but
    the sound was fine on other channels. However the bad channels aren't
    confined to any one band -- 3, 8, 12, 15, and 61. The sound is fine
    on the other channels -- 5, 10, 21, 25, 27, 33, 39, 45, 51, and 55,
    and even weak stations 4 and 48. The picture looks good on all but
    those latter two channels. All the channels give normal sound level
    with the TV and with another VCR (JVC U4600). I have an outdoor
    antenna and no cable.

    Deleting all the channels from the Panasonic VCR and having it rescan
    for channels didn't help, but unplugging the VCR for a few minutes
    apparently did.

    Do quartz tuners ever act up like this? I thought that they usually
    either gave bad reception for all channels or only for one band of
    channels.
     
  2. exray

    exray Guest

    Hmmm, I don't have an answer but I'll put in some food for thought.
    I work in cable and balancing audio levels across channels is nothing
    more than guesswork even with scopes and spectrum analyzers at hand.
    The audio bandwidth of the program content is a major factor in how it
    'sounds' on any individual receiving device.
    For my purposes a cheapo 13" no-frills TV set is the best common
    denominator for average audio. It may take me a week or two to level
    out audio from 60+ channels given the combinations of local vs network
    vs 800number commercials vs old movies, etc, audio sources.
    After all is said and done its not unusual to find certain sets that
    behave differently to the compression and af program bandwidth
    transmitted by the source and that indeed varies wildly.
    You don't have to be a nitpicky person to notice this because the
    differences can be very obvious to a casual listener on some sets and
    not on others.
    Unless someone has some particular clues on your specific model, and I
    can't imagine what they might be, I think what you are experiencing is
    'normal' in the broadcasting environment.
    FWIW
    -Bill M
     
  3. RonKZ650

    RonKZ650 Guest

    If it's a stereo VCR, make sure the audio is not set to SAP. This is a common
    thing causing sound problems.
    Ron
     
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