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SONY GDM-FW900 Brightness issues Strange!

Discussion in 'Electronic Repair' started by mike, Sep 24, 2003.

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  1. mike

    mike Guest

    I have a 24" Sony flat trinitron monitor, model GDM-FW900 that has the
    following symtomps:

    There are several horizontal strips of the reduced brightness. One
    large strip(2") is located on top, and there are several smaller
    strips(1/2") between center and top of the screen.

    I still can see the text in those areas, but it is approximately 35%
    darker. This problem appears when monitor warms up. There is slight
    vibration of these dark horizontal strips. The text behind doesn't
    move.

    Any ideas? Anybody has a schematic they would be willing to share?

    Thanks
     
  2. Jerry G.

    Jerry G. Guest

    Check for high ESR caps in the power supply and the horiz scan, and blanking
    areas to start with.

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    Jerry Greenberg GLG Technologies GLG
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    I have a 24" Sony flat trinitron monitor, model GDM-FW900 that has the
    following symtomps:

    There are several horizontal strips of the reduced brightness. One
    large strip(2") is located on top, and there are several smaller
    strips(1/2") between center and top of the screen.

    I still can see the text in those areas, but it is approximately 35%
    darker. This problem appears when monitor warms up. There is slight
    vibration of these dark horizontal strips. The text behind doesn't
    move.

    Any ideas? Anybody has a schematic they would be willing to share?

    Thanks
     
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