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Panasonic VCR has snow in "play", picture OK in FF/ REW?

Discussion in 'Electronic Repair' started by Guest, Jul 6, 2006.

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  1. Guest

    Guest Guest

    Hopefully someone can help me troubleshoot this problem.

    I have a Panasonic PV-V4522 "omnivision" VCR, and a few days ago, I put an
    old rental tape in it. It played for just a second, then the picture got
    garbled and snowy. I figured it may be a bad spot on the tape, so I rewound
    it. It rewound at a curiously slow speed, and still had massive snow on
    playback. This tape also kept trying to eject from the standalone tape
    rewinder, so I don't know if it was sticking or what.

    Anyway, I tried a different tape, and it also showed snow. Tried yet
    another, and more snow. If I manually adjust the tracking enough, you can
    get a glimpse of a picture hidden in the snow.

    So I tried a head cleaning cassette. The VCR didn't seem to like that.
    Groaning and so forth. Problem remained. Got a newer "brush" style cleaner
    tape, and it didn't help either.

    So here are the symptoms: The sound is fine, but the picture is nothing but
    white "static". However, if you fast forward or rewind while the tape is
    playing, the image returns, color and all. If you pause the tape, the
    picture returns (although in a garbled "pause" state). Here's the
    interesting part: If you take the tape off "pause" (resume playing), it
    plays just fine for about a second, then the picture goes back to being
    white static.

    Do you have any idea what might cause this sort of behavior?

  2. The heads are probably still dirty. Hopefully they were not damaged by
    the bad tape. The reason that it works in FF/REW is that a different set
    of heads are likely used for those modes.

    You can try "playing" a brand new tape for awhlie. That may clean up
    the heads.

    Or, clean it manually using the proper technique, or have it cleaned

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  3. lsmartino

    lsmartino Guest

    Jamie ha escrito:
    What ???
  4. Jamie

    Jamie Guest

    take the cover off the top, and clean off the tracking wheels.
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