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Magnavox ZV457MG9a problem

Discussion in 'Electronic Repair' started by whois, May 24, 2013.

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  1. whois

    whois Guest

    The VCR side of my Magnavox ZV457MG9a now sounds like a person
    snoring
    when it plays or records a tape, anyone else have this problem?
     
  2. N_Cook

    N_Cook Guest

    assuming its a mechanical noise, not noise on the audio, check the back
    tension on the supply side
     
  3. whois

    whois Guest

    The "snoring" sound coming from the VCR part of my Magnavox ZV427MG9A
    (DVD recorder / VCR combo) is from the hardware and not audio. This
    sound
    has just been noticeable for about a month now and is audible from 25
    feet
    away, either in play or record modes and with multiple tapes,
    including both
    6 & 8 hour tapes. I've had this unit for a year, as the original
    purchased unit
    lost vertical sync and was replaced after 11 months under warranty, by
    FUNAI
    as a "reconditioned" unit.

    I can find nothing to adjust the brake (tension) straps on either of
    the supply or
    take-up reels or nothing to bend.

    A stethoscope indicates the loudest "snoring" sound is coming from the
    VCR tape cartridge, regardless of which cartridge is in the machine.

    Haven't found any help with this specific problem online from Magnavox
    or FUNAI.
     
  4. N_Cook

    N_Cook Guest

    The "snoring" sound coming from the VCR part of my Magnavox ZV427MG9A
    (DVD recorder / VCR combo) is from the hardware and not audio. This
    sound
    has just been noticeable for about a month now and is audible from 25
    feet
    away, either in play or record modes and with multiple tapes,
    including both
    6 & 8 hour tapes. I've had this unit for a year, as the original
    purchased unit
    lost vertical sync and was replaced after 11 months under warranty, by
    FUNAI
    as a "reconditioned" unit.

    I can find nothing to adjust the brake (tension) straps on either of
    the supply or
    take-up reels or nothing to bend.

    A stethoscope indicates the loudest "snoring" sound is coming from the
    VCR tape cartridge, regardless of which cartridge is in the machine.

    Haven't found any help with this specific problem online from Magnavox
    or FUNAI.

    ++++

    the cartridge is probably acting as a resonator, so perhaps misleading. What
    happens to the sound if you manually move the braking actuator pillar in and
    out?
    The other possibility is part of the slip clutch assembly is worn/misplaced
    and some part is rubbing on the deck or even the underside of cartridges.
     
  5. whois

    whois Guest

    Thanks for your replies; your theory is correct but I haven't found
    any means
    of viewing or accessing the straps when a cartridge is in place. Also,
    I have
    been unable to find a parts list/manual for this unit.
     
  6. whois

    whois Guest

    I have determined the location of the "snoring" sound. There is a flat plastic
    part which has a piece of rubber-type pad on one end and about 180 degrees
    on the other end is a spring; this flat plastic part has a pivot hole in between
    the two ends. The "snoring sound is coming from the rubber-type pad which
    is held against the supply spindle, on the same surface that the brake strap
    rides.

    I removed this flat plastic part and the "snoring" sound is eliminated. But
    this flat plastic part is required, because the the rubber-type pad is used
    to apply drag against the supply spindle during sudden stops (such as
    during fast forward or rewind).

    There is no visible wear on the rubber-type pad or on the supply spindle
    surface which it rides. I cleaned the surface of the rubber-type pad with
    a pencil eraser and that did not change the "snoring" sound problem.
    I thought about putting a oil or silicone lubricant on the pad surface but
    that would also affect the function of the brake strap since both ride on
    the same surface of the supply spindle.

    Suggestions would be appreciated.
     
  7. Guest

    UPDATE ON VCR SNORING NOISE:
    after running more tests, i found that the "snoring"
    sound only happens in the SLP speed, not the SP speed.
    and MAY be associated with the belt that drives the
    spindles. i can see a portion of the belt through
    a hole in the motherboard, and with a wet Qtip,
    moistened the inside of the belt, which solved the
    noise problem for a short time. After drying, the
    noise returned.

    since removal of the belt would be a significant
    task (because to remove the drive assembly, requires
    removal of motherboard from case), is there any
    acceptable "belt dressing" available that i could
    apply with a Qtip?
     
  8. chuck

    chuck Guest

    Fedron. Perhaps it is available from Shop Jimmy. Ness used to carry
    it.
     
  9. N_Cook

    N_Cook Guest

    talcum powder is useful against belt squeel, dusted in on a small paint
    brush perhaps
     
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