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27" JVC Model AV-27920

Discussion in 'Electronic Basics' started by Comteck, Aug 28, 2005.

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  1. Comteck

    Comteck Guest

    I've got a 27" JVC TV. The TV works ok, but there is about an inch of
    space on the left hand side of the screen that does not display the
    picture. It looks like the screen has moved slightly to the right.
    Does anyone have any ideas where the problem might be?

    Any help would be appreciated. Thanks!

  2. Jasen Betts

    Jasen Betts Guest

    Could be a fault developing, or it could just need adjusting. the control
    will labeled h-phase, or h position (or have a picture of a square
    overlapping the side of another square) and if you're lucky it'll be
    accessible from outside the TV - possibly using a philips head
    screw-driver in the apropriattely labeled hole..

  3. If you are smart you will keep your screwdriver out of the set. There are
    no controls in the set. All is controlled through the service menu. The set
    needs service by a tech with the right experience and access to the service
    literature. There may or may not be a phase adjustment, but if there is and
    it needs adjustment it is likely that either lots more adjustments are off
    if the EEPROM is corrupt, and/or there is a problem causing the shift that
    needs to be fixed. Likely the latter.

  4. Mike Berger

    Mike Berger Guest

    Unless the TV is at least 15 years old, odds of finding a horizontal
    position control are virtually nil. And it's almost certainly
    developed a problem. Making a setting adjustment may mask it
    for a while, but it will almost certainly get worse. It's
    generally cheaper to fix problems when they develop.
  5. Guest

    Since that set is completely digitally controlled for all adjustments,
    it is highly unlikely any adjustment is going to fix the problem. You
    have a parts failure that needs to be repaired. Could be in either the
    h-deflection or video h-phase circuit.

    Although possible, the eeprom could have become corrupted, in which
    case the full chassis alignment will need performed after replacement
    per the service manual.

    Time to take it into a JVC experienced shop that has the service manual
    and equipment on hand in order to complete a diagnosis and repair.
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